Indian Institute of Technology Kharagpur |

We are involved in the research and development of semiconductor quantum and heterostructures for nanoscale electronic and photonic devices. Strained Ge alloy films and self-assembled quantum dots are grown by molecular beam epitaxy, sputtering and PLD deposition for silicon photonic devices. Mid infrared photodetectors and floating gate memory devices have been demonstrated using Ge nanocrystals. Silicon nanowires and heterojunction exhibit emission in the telecommunication wavelength and excellent antireflection characteristics. We demonstrated polarization sensitive ultra-high response photodetectors using single Si nanowire. Plasmonic ZnO nanostructures are being studied for multifunctional UV detectors, gas sensors and nano-generators. Currently we are involved on in the integration of 2D materials (graphene, MoS2 and WS2) on Si platforms for large area photonic devices. CMOS compatible gas sensing devices operated at room temperature are being studied using semiconductor nanostructures.
Major research activities of the group are outlined below:

* MBE growth of SiGe heterostructures, quantum wells and quantum dots
* Ge nanocrystals for light emitters and quantum dot memory devices
* Quantum cascade SiGe structures for THz sources and detectors
* Semiconductor nanostructures for photonic and electronic devices
* Si/Ge nanowires and their heterojunctions including single nanowire devices
* ZnO and other II-VI semiconductor nanostructures for sensing, memory and photonic devices
* 2D materials heterostructures on Si platforms
* Strained layer epitaxial growth of Si1-xGe, Si1-yCy and Si1-x-yGexCy films by MBE, UHVCVD and Solid phase epitaxy.
* Ultra-thin and high-k gate dielectric films on strained-Si and strained SiGe layers
* Ferroelectric thin films for memory and sensing applications

All Publications

Solution-Processed Black-Si/Cu2ZnSnS4Nanocrystal Heterojunctions for Self-Powered Broadband Photodetectors and Photovoltaic Devices Singh S., Sarkar A., Goswami D.K., Ray S.K. By ACS Applied Energy Materials - (2021)
Metal nanoparticles triggered persistent negative photoconductivity in silk protein hydrogels N. Gogurla, A. K. Sinha, D. Naskar, S.C. Kundu and S. K. Ray By Nanoscale 8 - (2016)
Low-noise, high-detectivity, polarization-sensitive, room-temperature infrared photodetectors based on Ge quantum dot-decorated Si-on-insulator nanowire field-effect transistors John J.W., Dhyani V., Singh S., Jakhar A., Sarkar A., Das S., Ray S.K. By Nanotechnology 32 - (2021)
A Photoswitchable and Photoluminescent Organic Semiconductor Based On Cationpi and CarboxylatePyridinium Interactions: A Supramolecular Approach S. Roy, S. P. Mondal, S. K. Ray and K.Biradha By Angew. Chem. Int. Ed., 2012 51 - (2012)
CdS-Decorated ZnO Nanorod Heterostructures for Improved Hybrid Photovoltaic Devices Tamita Rakshit, Suvra P. Mondal, Indranil Manna, and Samit K. Ray By ACS Appl. Mater. Interfaces 4 - (2012)
Invited Topical Review: , Nanocrystals for silicon-based light-emitting and memory devices S. K. Ray, S.Maikap, W Banerjee and S Das By J. Phys. D: Appl. Physics, 46 - (2013)
Multifunctional Au-ZnO Plasmonic Nanostructures for Enhanced UV Photodetector and Room Temperature NO Sensing Devices N. Gogurla, A. K.Sinha, S.Santra, S.Manna and S. K. Ray By Scientific Reports (A Nature Publishing Group journal) 4 - (2014)
Strained Silicon Heterostructures : Materials and Devices Institution of Electrical Engineers, c2001. IEE circuits, devices and systems series ; no. 12, ISBN. 0852967780 C.K. Maiti, N.B. Chakrabarti and S.K. Ray By IEE Circuits, Devices and Systems Series ; no. 12, - (2001)
Novel Colloidal MoS2 Quantum Dot Heterojunctions on Silicon Platforms for Multifunctional Optoelectronic Devices Sbhrajit Mukherjee, Rishi Maiti, Ajit K. Katiyar, Soumen Das & Samit K. Ray By Scientific Reports (A nature Publishing Group Journal) 6 - (2016)
Novel silicon compatible p-WS2 2D/3D heterojunction devices exhibiting broadband photoresponse and superior detectivity Rup K. Chowdhury, Rishi Maiti, Arup Ghorai, Anupam Midya and Samit K. Ray By Nanoscale 8 - (2016)

Completed Projects

Principal Investigator

Deasign and Fabrication of Piezo-phototronic and Tribotronic Devices using Band-engineered Two-dimensional Transition Metal Dichalcogenide Alloys for Self-powered and Mechanical Energy Harvesting Applications
Development of Novel Donor-Acceptor Covalent Organic Framework and Covalent Triazine Framework for Broadband and Tunable Photodetctor Devices
Ge Based Short-Wavelength Infrared (SWIR) Photodetectors for Imaging Application
Indian Nanoelectronics Users Program-Idea to Innovation (INUP I2I)
Morphology-Graded I-Dimensional Hybrid Nanostructures for Green Energy Conversion and Optoelectronic Applications
Nano-electronics Network for Research and Application (NNetRA)- IIT Kharagpur (MEITY Part)
Nano-electronics Network for Research and Applications (NNetRA)- IIT Kharagpur (DST Part)
Triboelectric Nanogenerator for Biomedical Sensing Applications
Usage charges for facilities under INUP i2i and NNetRA projects
XPS analysis of samples

Co-Principal Investigator

Air Quality Monitoring Prototype Ministry of Electronics and Information Technology
Development of Flexible Humidity and Temperature Sensors for Healthcare Applications (Meity Part) Ministry of Electronics and Information Technology

Alumni members

Ph. D. Students

Animesh Mandal

Area of Research: Optical properties of 2D heterostructures

Baidyanath Roy

Area of Research: Nanomaterials and senosrs

Deepak Kumar Sahu

Area of Research: Optoelectronic devices

Nikita Dey

Area of Research: Sensor

Santu Kumar Ghosh

Area of Research: Magnetic and semiconducting devices

Saranya Das

Area of Research: 2D materials heterostructures for photonic device applications

Saswata Goswami

Area of Research: 2D materials for energy harvesting

Satayender

Area of Research: Organic Electronics

Sayan Chakraborty

Area of Research: Flexible electronic devices

Sayori Biswas

Area of Research: Nanomaterial based devices for biosensing

Shaona Bose

Area of Research: 2D Heterostructures

Shreyasi Das

Area of Research: Nanomaterial based biosensing

Subham Saha

Area of Research: Nanoelectronic devices

Journal

One-pot liquid-phase synthesis of MoS2-WS2 van der waals heterostructures for broadband photodetection Bose S., Mukherjee S., Jana S., Srivastava S.K., Ray S.K. By Nanotechnology 34 - (2023)
Boron carbonitride (BxCyNz) nanosheets based single electrode triboelectric nanogenerator for wearable UV photodetectors Bayan S., Pal S., Ray S.K. By Applied Materials Today 30 - (2023)
Photosensitive Field-Effect Transistor with Enhanced Photoamplification Mediated by Charge Transfer in a Heterostructure of - CsPb I3 Nanocrystals and Two-Dimensional WS2 Das S., Ghorai A., Pal S., Mahato S., Das S., Ray S.K. By Physical Review Applied 19 - (2023)
Progress in group-IV semiconductor nanowires based photonic devices Singh S., Das S., Ray S.K. By Applied Physics A: Materials Science and Processing 129 - (2023)
CsPbI3/N-GQDs dual layer phosphor-converted white-LEDs with ultrahigh luminous efficiency and color rendering index Dey T., Ghorai A., Das S., Ray S.K. By Nanotechnology 34 - (2023)
Cu-Doping Induced Phase Transformation in CsPbI 3 Nanocrystals with Enhanced Structural Stability and Photoluminescence Quantum Yield Roy B., Mahato S. , Bose S. , Ghorai A. , Srivastava S. K., Das N. C., Ray S. K. By Chemistry of Materials 35 1601-1609 (2023)
Atomic Insights of Stable, Monodispersed CsPbI3 xBrx (x = 0, 1, 2, 3) Nanocrystals Synthesized by Modified Ligand Cell Ghorai A., Mahato S. , Srivastava S. K., Ray S. K. By Advanced Functional Materials 32 - (2022)
Atomic-Scale Imaging and Nano-Scale Mapping of Cubic CsPbI3 Perovskite Nanocrystals for Inverted Perovskite Solar Cells Mahato S., Ghorai A. , Mondal A. , Srivastava S. K., Modak M. , Das S. , Ray S. K. By ACS Applied Materials and Interfaces 14 9711-9723 (2022)
Functionalized Two-Dimensional Carbon Nitride Nanodots Detect and Reverse Lead Toxicity in the Physiological Milieu Mondal S., Bayan S., Ghosh R., Das M., Adhikari A., Mukherjee D., Mallick A.K., Ray S.K., Pal S.K. By ACS Applied Materials and Interfaces 14 27002-27012 (2022)
Ge-Ge0.92Sn0.08core-shell single nanowire infrared photodetector with superior characteristics for on-chip optical communication Singh S., Mukherjee S., Mukherjee S., Assali S., Luo L., Das S., Moutanabbir O., Ray S.K. By Applied Physics Letters 120 - (2022)
Interface engineered silver nanoparticles decorated g-C3N4 nanosheets for textile based triboelectric nanogenerators as wearable power sources Bayan S., Pal S., Ray S.K. By Nano Energy 94 - (2022)
Plasmonic Silver Nanoparticle-Mediated Enhanced Broadband Photoresponse of Few-Layer Phosphorene/Si Vertical Heterojunctions Jana S., Mukherjee S., Bhaktha B N S., Ray S.K. By ACS Applied Materials and Interfaces 14 1699-1709 (2022)
Black-Arsenic/Germanium-on-Insulator Heterostructure Field Effect Transistor for Ultrafast Polarization Sensitive Short-Wave Infrared Photodetection John J.W., Dhyani V., Jakhar A., Sandhu H.K., Dewan S., Ray S.K., Das S. By IEEE Electron Device Letters 43 1495-1498 (2022)
Light-induced enhancement of memory effect in self-assembled pyrene nanostructures Ghorai A., Basori R., Midya A., Ray S.K. By Journal of Materials Science 57 489-499 (2022)
Solvent-engineered performance improvement of graphene quantum dot sensitized solar cells with nitrogen functionalized GQD photosensitizers Dey T., Ghorai A., Das S., Ray S.K. By Solar Energy 236 17-25 (2022)
High-Performance Broad-Band Photodetection Based on Graphene-MoS2 xSe2(1- x)Alloy Engineered Phototransistors Mukherjee S., Bhattacharya D., Ray S.K., Pal A.N. By ACS Applied Materials and Interfaces 14 34875-34883 (2022)
High-Responsivity Gate-Tunable Ultraviolet-Visible Broadband Phototransistor Based on Graphene-WS2Mixed-Dimensional (2D-0D) Heterostructure Mukherjee S., Bhattacharya D., Patra S., Paul S., Mitra R.K., Mahadevan P., Pal A.N., Ray S.K. By ACS Applied Materials and Interfaces 14 5775-5784 (2022)
Two-Dimensional MoxW1 xS2 Alloys for Nanogenerators Producing Record Piezo-Output and Coupled Photodetectors for Self-Powered UV Sensor Bhattacharya D., Mukherjee S., Pal A.N., Mitra R.K., Ray S.K. By Advanced Optical Materials 10 - (2022)
Fabrication of a Vitamin B12-Loaded Carbon Dot/Mixed-Ligand Metal Organic Framework Encapsulated within the Gelatin Microsphere for pH Sensing and In Vitro Wound Healing Assessment Bhattacharya S. K., Nandi S. , Dey T. , Ray S. K., Mandal M. , Das N. C., Banerjee S. By ACS Applied Bio Materials 5 5693 57- (2022)
Vacancy-Mediated Anomalous Emission Characteristics of Size-Confined Semiconducting CoTe2 Das S., Pal S., Kumbhakar P., Tromer R.M., Negedu S.D., Galvao D.S., Das S., Tiwary C.S., Ray S.K. By ACS Applied Materials and Interfaces 14 53139-53149 (2022)
Synergistic Effects of Plasmonic Au Nanoislands on a MoSe2 Nanoflake/ZnO Nanorod Heterostructure for an Enhanced Broadband Photoresponse Jana S., Pal S. , N S. B., Ray S. K. By ACS Appl. Nano Mater. 5 18106-18115 (2022)
2D WS2embedded PVDF nanocomposites for photosensitive piezoelectric nanogenerators with a colossal energy conversion efficiency of 25.6% Bhattacharya D., Bayan S., Mitra R.K., Ray S.K. By Nanoscale 13 15819-15829 (2021)
Development of Triboelectroceutical Fabrics for Potential Applications in Self-Sanitizing Personal Protective Equipment Bayan S., Adhikari A., Pal U., Ghosh R., Mondal S., Darbar S., Saha-Dasgupta T., Ray S.K., Pal S.K. By ACS Applied Bio Materials 4 5485-5493 (2021)
MoSe2-Cu2- xS/GaAs Heterostructure-Based Self-Biased Two Color-Band Photodetectors with High Detectivity Sarkar S.S., Bera S., Hassan M.S., Sapra S., Khatri R.K., Ray S.K. By Journal of Physical Chemistry C 125 10768-10776 (2021)
MoSe2Nanosheets with Tuneable Optical Properties for Broadband Visible Light Photodetection Ghorai A., Ray S.K., Midya A. By ACS Applied Nano Materials 4 2999-3006 (2021)
Strain mediated light emission using heterojunctions of all-inorganic mixed-halide perovskite nanocrystals via piezo-phototronic effect Pal S., Ghorai A., Goswami D.K., Ray S.K. By Nano Energy 87 - (2021)
High-Performance Chlorophyll-b/Si Nanowire Heterostructure for Self-Biasing Bioinorganic Hybrid Photodetectors Mondal H., Ray S.K., Chakrabarty P., Pal S., Gangopadhyay G., Das S., Das S., Basori R. By ACS Applied Nano Materials - (2021)
Two-dimensional Re S2: Solution to the unresolved queries on its structure and inter-layer coupling leading to potential optical applications Gadde J.R., Karmakar A., Maji T.K., Mukherjee S., Alexander R., Sharma A.M.R., Das S., Mandal A., Dasgupta K., Naik A., Majumdar K., Hawaldar R., Adarsh K.V., Ray S.K., Karmakar D. By Physical Review Materials 5 - (2021)
Nanoceutical Fabric Prevents COVID-19 Spread through Expelled Respiratory Droplets: A Combined Computational, Spectroscopic, and Antimicrobial Study Adhikari A., Pal U., Bayan S., Mondal S., Ghosh R., Darbar S., Saha-Dasgupta T., Ray S.K., Pal S.K. By ACS Applied Bio Materials 4 5471-5484 (2021)
Plasmon Triggered, Enhanced Light-Matter Interactions in Au-MoS2Coupled System with Superior Photosensitivity Mukherjee S., Chowdhury R.K., Karmakar D., Wan M., Jacob C., Das S., Ray S.K. By Journal of Physical Chemistry C 125 11023-11034 (2021)
Substrate-dependent synergistic many-body effects in atomically thin two-dimensional WS2 Das S., Chowdhury R. K., Karmakar D. , Das S. , Ray S. K. By Physical Review Materials 5 124001- (2021)
Substrate-dependent synergistic many-body effects in atomically thin two-dimensional W S2 Das S., Chowdhury R.K., Karmakar D., Das S., Ray S.K. By Physical Review Materials 5 - (2021)
Nitrogen vacancy and hydrogen substitution mediated tunable optoelectronic properties of g-C3N4 2D layered structures: Applications towards blue LED to broad-band photodetection Ghosh A., Saini H., Sarkar A., Guha P., Samantara A.K., Thapa R., Mandal S., Mandal A., Behera J.N., Ray S.K., Goswami D.K. By Applied Surface Science 556 - (2021)
Room Temperature Detection of Formaldehyde with Economical and Ecofriendly Graphene Quantum Dot Ink Treated Paper-Based Sensor Das S., Chakrabarty P. , Dey T. , Santra S. , Das S. , Ray S. K. By Advances in Medical Physics and Healthcare Engineering 265-276 (2021)
Low-noise, high-detectivity, polarization-sensitive, room-temperature infrared photodetectors based on Ge quantum dot-decorated Si-on-insulator nanowire field-effect transistors John J.W., Dhyani V., Singh S., Jakhar A., Sarkar A., Das S., Ray S.K. By Nanotechnology 32 - (2021)
WS2Nanosheet/Si p-n Heterojunction Diodes for UV-Visible Broadband Photodetection Pal S., Mukherjee S., Jangir R., Nand M., Jana D., Mandal S.K., Bhunia S., Mukherjee C., Jha S.N., Ray S.K. By ACS Applied Nano Materials 4 3241-3251 (2021)
Electron-hole plasma formation dynamics observed through exciton-plasma interactions in transition metal dichalcogenides Karmakar M., Mukherjee S., Ray S.K., Datta P.K. By Physical Review B 104 - (2021)
Boron Carbonitride Nanosheet/ZnO Nanorod Heterojunctions for White-Light Emission Pal S., Bayan S., Goswami D.K., Ray S.K. By ACS Applied Nano Materials 4 8572-8585 (2021)
Solution-Processed Black-Si/Cu2ZnSnS4Nanocrystal Heterojunctions for Self-Powered Broadband Photodetectors and Photovoltaic Devices Singh S., Sarkar A., Goswami D.K., Ray S.K. By ACS Applied Energy Materials - (2021)
Highly Air-Stable Single-Crystalline -CsPbI3 Nanorods: A Platform for Inverted Perovskite Solar Cells Mahato S., Ghorai A. , Srivastava S. K., Modak M. , Singh S. , Ray S. K. By Advanced Energy Materials 2001305- (2020)
Negative Thermal Quenching and Size-Dependent Optical Characteristics of Highly Luminescent Phosphorene Nanocrystals Jana S., Mukherjee S. , Ghorai A. , Bhaktha Bn S. , Ray S. K. By Advanced Optical Materials 8 2000180- (2020)
Resonant and non-resonant coupling of one-dimensional microcavity mode and optical Tamm state Das P., Mukherjee S. , Jana S. , Ray S. K., Bhaktha Bn S. By J. Opt. 22 065002- (2020)
Ultrafast Investigation of Individual Bright Exciton Plasmon Polaritons in Size Tunable Metal WS2 Hybrid Nanostructures Chowdhury R., Datta P. K., Bhaktha Bn S. , Ray S. K. By Advanced Optical Materials 8 1901645- (2020)
Ultrafast real-time observation of double Fano resonances in discrete excitons and single plasmon-continuum Chowdhury R., Mukherjee S. , Bhaktha Bn S. , Ray S. K. By Phys. Rev. B 101 245442- (2020)
Plasmon charge transfer dynamics in layered Au-ZnO nanocomposites Gogurla N., Chowdhury R. K., Bhattacharya S. , Datta P. K., Ray S. K. By Journal of Applied Physics 127 053105-9 (2020)
Superior optical ( ~1550 nm) emission and detection characteristics of Ge microdisks grown on virtual Si0.5Ge0.5/Si substrates using molecular beam epitaxy Singh S., Katiyar A. K., Sarkar A. , Shihabudeen P. , Roy Chaudhuri A. , Goswami D. K., Ray S. K. By Nanotechnology 31 115206- (2020)
Superior optical ( 1550 nm) emission and detection characteristics of Ge microdisks grown on virtual Si0.5Ge0.5/Si substrates using molecular beam epitaxy Singh S., Katiyar A. K., Sarkar A. , Shihabudeen P. , Roy Chaudhuri A. , Goswami D. K., Ray S. K. By Nanotechnology 31 115206- (2020)
Superior Performance Self-Powered Photodetectors Utilizing the Piezo-Phototronic Effect in SnO Nanosheet/ZnO Nanorod Hybrid Heterojunctions Pal S., Bayan S., Goswami D.K., Ray S.K. By ACS Applied Electronic Materials 2 1716-1723 (2020)
Polymer Thin-Film Dewetting-Mediated Growth of Wettability-Controlled Titania Nanorod Arrays for Highly Responsive, Water-Stable Self-powered UV Photodetectors Chakrabarty P., Ghorai A., Ray S.K., Mukherjee R. By ACS Applied Electronic Materials 2 2895-2905 (2020)
FexNi(1-x)O/NiO heterojunction based selective VOC sensor device by using temperature tunability Dey S., Santra S. , Ray S. K., Guha P. K. By IEEE Sensors Journal 20 7503-7508 (2020)
Polymer Thin-Film Dewetting-Mediated Growth of Wettability-Controlled Titania Nanorod Arrays for Highly Responsive, Water-Stable Self-powered UV Photodetectors Chakrabarty P., Ghorai A. , Ray S. K., Mukherjee R. By ACS Applied Electronic Materials 2 2895-2905 (2020)
FexNi(1-x)O/NiO Heterojunction-Based Selective VOC Sensor Device by Using Temperature Tunability Dey S., Santra S., Ray S.K., Ray S.K., Guha P.K. By IEEE Sensors Journal 20 7503-7508 (2020)
Effects of Size and Localized States in Charge Carrier Dynamics and Performance of Solution-Processed Graphene Quantum Dots/Silicon Heterojunction Near-UV Photodetectors Dey T., Mukherjee S., Ghorai A., Das S., Ray S.K. By Journal of Physical Chemistry C 124 12161-12167 (2020)
Voltage controlled NiO/ZnO p-n heterojunction diode: A new approach towards selective VOC sensing Dey S., Nag S. , Santra S. , Ray S. K., Guha P. K. By Microsystems & Nanoengineering 6 - (2020)
Self-powered flexible photodetectors based on Ag nanoparticle-loaded g-C3N4nanosheets and PVDF hybrids: Role of plasmonic and piezoelectric effects Bayan S., Bhattacharya D., Mitra R.K., Ray S.K., Ray S.K. By Nanotechnology 31 - (2020)
Photoresponse characteristics of MoS2 QDs/Si nanocone heterojunctions utilizing geometry controlled light trapping mechanism in black Si Sarkar A., Mukherjee S., Das A.K., Ray S.K. By Nanotechnology 30 - (2019)
Light Trapping-Mediated Room-Temperature Gas Sensing by Ordered ZnO Nano Structures Decorated with Plasmonic Au Nanoparticles Chakrabarty P., Banik M. , Gogurla N. , Santra S. , Ray S. K., Mukherjee R. By ACS Omega 4 12071-12080 (2019)
Ultrafast time-resolved investigations of excitons and biexcitons at room temperature in layered WS2 Chowdhury R.K., Nandy S., Bhattacharya S., Karmakar M., Bhaktha S.N.B., Datta P.K., Taraphder A., Ray S.K. By 2D Materials 6 - (2019)
Ultrafast time-resolved investigations of excitons and biexcitons at room temperature in layered WS2 Chowdhury R. K., Nandy S. , Bhattacharya S. , Karmakar M. , N S. B., Datta P. K., Taraphder A. , Ray S. K. By 2D Materials 6 015011- (2019)
Liquid Exfoliated NiO Nanosheets for Trace Level Detection of Acetone Vapors Dey S., Santra S., Guha P.K., Ray S.K. By IEEE Transactions on Electron Devices 66 3568-3572 (2019)
Liquid exfoliated NiO nanosheets for trace level detection of acetone vapours Dey S., Santra S. , Guha P. K., Ray S. K. By IEEE Transaction Electron Devices 66 3568-3572 (2019)
Surfactant-induced anion exchange and morphological evolution for composition-controlled caesium lead halide perovskites with tunable optical properties Ghorai A., Midya A., Ray S.K. By ACS Omega 4 12948-12954 (2019)
FÃ¶rster Resonance Energy Transfer Mediated Charge Separation in Plasmonic 2D/1D Hybrid Heterojunctions of Ag-C3N4/ZnO for Enhanced Photodetection Bayan S., Gogurla N., Ghorai A., Ray S.K. By ACS Applied Nano Materials 2 3848-3856 (2019)
Selective photoresponse of plasmonic silver nanoparticle decorated Bi2Se3 nanosheets Gupta A., Chowdhury R. K., Ray S. K., Srivastava S. K. By Nanotechnology 30 435204- (2019)
Selective photoresponse of plasmonic silver nanoparticle decorated Bi2Se3 nanosheets Gupta A., Chowdhury R. K., Ray S. K., Srivastava S. K. By Nanotechnology 30 435204- (2019)
Application of tungsten disulfide quantum dot-conjugated antimicrobial peptides in bio-imaging and antimicrobial therapy Mohid S.A., Ghorai A., Ilyas H., Mroue K.H., Narayanan G., Sarkar A., Ray S.K., Biswas K., Bera A.K., Malmsten M., Midya A., Bhunia A. By Colloids and Surfaces B: Biointerfaces 176 360-370 (2019)
Mesoporous GO-TiO2 nanocomposites for flexible solid-state supercapacitor applications Rani P., Ghorai A., Roy S., Goswami D.K., Midya A., Ray S.K. By Materials Research Express 6 - (2019)
P-type -MoO2 nanostructures on n-Si by hydrogenation process: synthesis and application towards self-biased UV-visible photodetection Guha P., Ghosh A. , Sarkar A. , Mandal S. , Ray S. K., Goswami D. K., Satyam P. V. By Nanotechnology 30 35204-35219 (2019)
Infrared tunable, two colour-band photodetectors on flexible platforms using 0D/2D PbS-MoS2 hybrids Mukherjee S., Jana S., Sinha T.K., Das S., Ray S.K. By Nanoscale Advances 1 3279-3287 (2019)
Colloidal Transfer Printingâ Mediated Fabrication of Zinc Oxide Nanorods for Self-Cleaning Applications Banik M., Chakrabarty P., Das A., Ray S.K., Mukherjee R. By Advanced Materials Interfaces 6 - (2019)
Colloidal Transfer Printing Mediated Fabrication of Zinc Oxide Nanorods for Self Cleaning Applications Banik M., Chakrabarty P. , Das A. , Ray S. K., Mukherjee R. By Advanced Materials Interfaces 6 1900063- (2019)
Solution Processed Highly Responsive UV Photodetectors from Carbon Nanodot/Silicon Heterojunctions Maiti R., Mukherjee S., Dey T., Ray S.K. By ACS Applied Nano Materials 2 3971-3976 (2019)
Optical Tamm state aided room-temperature amplified spontaneous emission from carbon quantum dots embedded one-dimensional photonic crystals Das P., Mukherjee S., Wan M., Ray S.K., Shivakiran Bhaktha B.N. By Journal of Physics D: Applied Physics 52 - (2019)
Optical Tamm State Aided Room temperature Amplified Spontaneous Emission from Carbon Quantum Dots Embedded One-dimensional Photonic Crystals Das P., Mukherjee S. , Wan M. , Ray S. K., Bhaktha Bn S. By J. Phys. D: Appl. Phys. 52 035102- (2019)
Raman investigation of N-implanted ZnO: Defects, disorder and recovery Mondal A., Pal S., Sarkar A., Bhattacharya T.S., Pal S., Singha A., Ray S.K., Kumar P., Kanjilal D., Jana D. By Journal of Raman Spectroscopy 50 1926-1937 (2019)
Rapid growth of fully-inorganic flexible CaxCoO2 thin films from a ligand free aqueous precursor ink for thermoelectric applications Sinha T.K., Lee J., Kim J.K., Ray S.K., Paul B. By Chemical Communications 55 7784-7787 (2019)
Highly emissive fluorene and thiophene based Ï -conjugated A-alt-B copolymers: Synthesis, characterization and electroluminescence properties Islam S.N., Gogurla N., Giri D., Ray S.K., Patra S.K. By Journal of Luminescence 208 509-518 (2019)
MoSe2-Cu2S Vertical p-n Nanoheterostructures for High-Performance Photodetectors Hassan M.S., Bera S., Gupta D., Ray S.K., Sapra S. By ACS Applied Materials and Interfaces 11 4074-4083 (2019)
Selective chloroform sensor using thiol functionalized reduced graphene oxide at room temperature Midya A., Mukherjee S., Roy S., Santra S., Manna N., Ray S.K. By Materials Research Express 5 - (2018)
Highly Responsive, Polarization Sensitive, Self-Biased Single GeO2-Ge Nanowire Device for Broadband and Low Power Photodetectors Mukherjee S., Das K., Das S., Ray S.K. By ACS Photonics 5 4170-4178 (2018)
Si membrane ZnO heterojunction-based broad band visible light emitting diode for flexible optoelectronic devices Sarkar A., A. , Das A. K., Ray S. K. By Flexible and Printed Electronics 3 025004- (2018)
Si membrane-ZnO heterojunction-based broad band visible light emitting diode for flexible optoelectronic devices Sarkar A., Katiyar A.K., Das A.K., Ray S.K. By Flexible and Printed Electronics 3 - (2018)
Coral like CuxNi(1-x)O based resistive sensor for humidity and VOC detection Dey S., Santra S. , Ray S. K., Guha P. K. By IEEE Sensors Journal 18 6078-6084 (2018)
Coral-like CuxNi(1-x)O-based resistive sensor for humidity and VOC detection Dey S., Santra S., Ray S.K., Guha P.K. By IEEE Sensors Journal 18 6078-6084 (2018)
Raman spectroscopic analysis on Li, N and (Li,N) implanted ZnO Mondal A., Pal S., Sarkar A., Bhattacharya T.S., Das A., Gogurla N., Ray S.K., Kumar P., Kanjilal D., Devi K.D., Singha A., Chattopadhyay S., Jana D. By Materials Science in Semiconductor Processing 80 111-117 (2018)
Tunable Optical and Electrical Transport Properties of Size- and Temperature-Controlled Polymorph MoS2 Nanocrystals Mukherjee S., Biswas S., Ghorai A., Midya A., Das S., Ray S.K. By Journal of Physical Chemistry C 122 12502-12511 (2018)
Tuning Emission Properties via Aromatic Guest Inclusion in Organic Salts Composed of 4, 4 -Dinitro-2, 2 , 6, 6 -tetracarboxybiphenyl and Acridine Garai A., Mukherjee S. , Ray S. K., Biradha K. By Crystal Growth & Design 18 581-586 (2018)
Ultrafast time-resolved investigations of excitons and biexcitons at room temperature in layered WS2 Datta P. K., Ray S. K., Taraphder A. , Chowdhury R. K., Bhattacharya S. , Nandy S. , N S. B., Karmakar M. By 2D Materials 6 0150011- (2018)
A comprehensive dual beam approach for broadband control of ultrafast optical nonlinearity in reduced graphene oxide Bhattacharya S., Ghorai A., Raval S., Karmakar M., Midya A., Ray S.K., Datta P.K. By Carbon 134 80-91 (2018)
A comprehensive dual beam approach for broadband control of ultrafast optical nonlinearity in reduced graphene oxide Datta P. K., Ray S. K., Bhattacharya S. , Ghorai A. , Raval S. , Karmakar M. , Midya A. By Carbon 134 80-91 (2018)
Superior charge storage performance of WS2 quantum dots in a flexible solid state supercapacitor Ghorai A., Midya A., Ray S.K. By New Journal of Chemistry 42 3609-3613 (2018)
Photon-assisted ultra-selective formaldehyde sensing by defect induced NiO-based resistive sensor Dey S., Santra S., Sen S., Burman D., Ray S.K., Guha P.K. By IEEE Sensors Journal 18 5656-5661 (2018)
Enhanced performance of hybrid self-biased heterojunction photodetector on soft-lithographically patterned organic platform Chakrabarty P., Gogurla N., Bhandaru N., Ray S.K., Mukherjee R. By Nanotechnology 29 - (2018)
Geometry controlled white light emission and extraction in CdS/black-Si conical heterojunctions Sarkar A., A. , S. , S. , S. , Das A. K., Ray S. K. By ACS Applied Electronic Materials 1 25-33 (2018)
Piezo-phototronic mediated enhanced photodetection characteristics of plasmonic Au-g-C3N4/CdS/ZnO based hybrid heterojunctions on a flexible platform Pal S., Bayan S., Ray S.K. By Nanoscale 10 19203-19211 (2018)
Surface state selective tunable emission of graphene quantum dots exhibiting novel thermal quenching characteristics Dey T., Mukherjee S. , Ghorai A. , Das S. , Ray S. K. By Carbon 140 394-403 (2018)
Surface state selective tunable emission of graphene quantum dots exhibiting novel thermal quenching characteristics Dey T., Mukherjee S., Ghorai A., Das S., Ray S.K. By Carbon 140 394-403 (2018)
Germanium growth on electron beam lithography patterned Si 3 N 4 /Si(001) substrate using molecular beam epitaxy Sarkar S.S., Katiyar A.K., Sarkar A., Dhar A., Rudra A., Khatri R.K., Ray S.K. By Applied Surface Science 437 144-151 (2018)
Plasmon mediated enhancement of visible light emission of Au-ZnO nanocomposites Gogurla N., Bayan S., Chakrabarty P., Ray S.K. By Journal of Luminescence 194 15-21 (2018)
Surface potential, charging and local current transport of individual Ge quantum dots grown by molecular beam epitaxy Singha R. K., Manna S. , Bar R. , Das S. , Ray S. K. By Applied Surface Science 407 418- (2017)
Synergistic effect of polymer encapsulated silver nanoparticles doped WS2 sheets for plasmon enhanced 2D/3D heterojunction photodetectors Chowdhury R. K., Sinha T. K., Katiyar A. K., Ray S. K. By Nanoscale 9 15591-155597 (2017)
Synthesis of Cu x Ni (1 x) O coral-like nanostructures and their application in the design of a reusable toxic heavy metal ion sensor based on an adsorption-mediated electrochemical technique Dey S., Santra S. , Midya A. , Guha P. K., Ray S. K. By Environmental Science: Nano 4 191-202 (2017)
Enhanced UV visible photodetection characteristics of a flexible Si membraneZnO heterojunction utilizing piezo-phototronic effect 145104 (2017) Sarkar A., Katiyar A. , Mukherjee S. , Ray S. K. By J. Phys. D: Appl. Phys. 50 145104- (2017)
Highly Luminescent WS2 Quantum Dots/ZnO heterojunctions for Light Emitting Devices Ghorai A. K., Bayan S. , Gogurla N. , Midya A. , Ray S. K. By ACS Applied materials & Interfaces 9 558-565 (2017)
Highly Luminescent WS2 Quantum Dots/ZnO heterojunctions for Light Emitting Devices Ghorai A., Bayan S. , Gogurla N. , Midya A. , Ray S. K. By ACS Appl. Mater. Interfaces 558-565 (2017)
Role of vacancy sites and UV-ozone treatment on few layered MoS2 nanoflakes for toxic gas detection Burman D., Ghosh R. , Santra S. , Ray S. K., Guha P. K. By Nanotechnology 28 - (2017)
Hybrid Opto-chemical doping in Ag nanoparticle decorated monolayer CVD graphene probed by Raman spectroscopy Maiti R., Haldar S. , Majumdar D. , Singha A. K., Ray S. K. By Nanotechnology 28 075707- (2017)
A Facile One Pot Synthesis of Highly Stable Graphene-Ag0 Hybrid Nanostructures with Enhanced Optical Properties Datta P. K., Bhattacharya S. , Maiti R. , Sinha T. K., Ray S. K. By The Journal of Physical Chemistry C 121 21591-21599 (2017)
Topical Review: One-dimensional Si/Ge nanowires and their heterostructures for multifunctional applications A review Katiyar A. K., Raychaudhuri A. K., Ray S. K. By Nanotechnology 28 092001- (2017)
Solution processed, hybrid 2D/3D MoS2/Si heterostructures with superior junction characteristics Mukherjee S., Biswas S. , Das S. , Ray S. K. By Nanotechnology 28 135203- (2017)
Plasmonic enhanced optical characteristics of Ag nanostructured ZnO thin films Sarkar A., Gogurla N. , Bhaktha Bn S. , Ray S. K. By Materials Research Express 3 046403- (2016)
Studies on nanotribological and oxidation resistance properties of yttria stabilized zirconia (YSZ), alumina (Al 2 O 3) based thin films developed by pulsed laser deposition Nath S., Manna I. , Ray S. K., Majumdar J. D. By Ceramic International 42 7060-7071 (2016)
White light emission characteristics of two dimensional graphitic carbon nitride and ZnO nanorod hybrid heterojunctions Bayan S., Gogurla N. , Midya A. , Ray S. K. By Carbon 108 335- (2016)
Novel Colloidal MoS2 Quantum Dot Heterojunctions on Silicon Platforms for Multifunctional Optoelectronic Devices Sbhrajit Mukherjee, Rishi Maiti, Ajit K. Katiyar, Soumen Das & Samit K. Ray By Scientific Reports (A nature Publishing Group Journal) 6 - (2016)
Novel silicon compatible p-WS2 2D/3D heterojunction devices exhibiting broadband photoresponse and superior detectivity Rup K. Chowdhury, Rishi Maiti, Arup Ghorai, Anupam Midya and Samit K. Ray By Nanoscale 8 - (2016)
Novel thermal quenching characteristics of luminescent carbon nanodots via tailoring the surface chemical groups Maiti R., Mukherjee S. , Halder S. , Bhowmick D. , Ray S. K. By Carbon 104 226-232 (2016)
High energy density layered-spinel hybrid cathodes for lithium ion rechargeable batteries Majumder S. B., S. B., Dahiya P. P., Akhtar M. , Ray S. K., Chang J. K. By Materials Science and Engineering B 148-156 (2016)
Metal nanoparticles triggered persistent negative photoconductivity in silk protein hydrogels N. Gogurla, A. K. Sinha, D. Naskar, S.C. Kundu and S. K. Ray By Nanoscale 8 - (2016)
Efficient control of ultrafast optical nonlinearity of reduced graphene oxide by infrared reduction Bhattachraya S., Maiti R. , Das A. , Saha S. , Mondal S. , Ray S. K., Bhaktha Bn S. , Datta P. K. By J. Appl. Phys. 120 013101- (2016)
Efficient control of ultrafast optical nonlinearity of reduced graphene oxide by infrared reduction Datta P. K., Ray S. K., N S. B., Bhattacharya S. , Saha S. , Maiti R. , Das A. C., Mondal S. By Journal of Applied Physics 120 013101-013107 (2016)
Hydrothermal Growth of Few Layer 2H-MoS2 for Heterojunction Photodetector and Visible Light Induced Photocatalytic Applications Midya A., Ghorai A. , Mukherjee S. , Maiti R. , Ray S. K. By Journal of Materials Chemistry A 4 4543- (2016)
Effect of SnO2 concentration on the tuning of optical and electrical properties of ZnO-SnO2 composite thin films Rakshit T., Manna I. , Ray S. K. By Journal of Applied Physics 117 025704-8 (2015)
CMOS integration of inkjet-printed graphene for humidity sensing Santra S., Hu G. , Howe R. , Luca A. , Ali S. , Udrea F. , Gardner J. , Ray S. K., Guha P. K., Hasan T. By Nature Scientific Report 5 1-12 (2015)
Fabrication of Si/ZnS radial nanowire heterojunction arrays for white light emitting devices on Si substrates Ajit K. Katiyar, Arun Kumar Sinha, Santanu Manna, and Samit K. Ray By ACS Applied Materials and Interfaces 6 - (2014)
Multifunctional Au-ZnO Plasmonic Nanostructures for Enhanced UV Photodetector and Room Temperature NO Sensing Devices N. Gogurla, A. K.Sinha, S.Santra, S.Manna and S. K. Ray By Scientific Reports (A Nature Publishing Group journal) 4 - (2014)
Multifunctional White Light-Emitting Metal-Organic Gels with a Sensing Ability of Nitrobenzene Roy S., Katiyar A. , Mondal S. , Ray S. K., Biradha K. By ACS Applied Materials & Interfaces 6 11493-11501 (2014)
Enhanced sensitivity and selectivity of brush-like SnO2 nanowire/ZnO nanorod heterostructure based sensors for volatile organic compounds Rakshita T., Santra S. , Manna I. , Ray S. K. By RSC Advances 4 36749-36756 (2014)
Invited Topical Review: , Nanocrystals for silicon-based light-emitting and memory devices S. K. Ray, S.Maikap, W Banerjee and S Das By J. Phys. D: Appl. Physics, 46 - (2013)
A Photoswitchable and Photoluminescent Organic Semiconductor Based On Cationpi and CarboxylatePyridinium Interactions: A Supramolecular Approach S. Roy, S. P. Mondal, S. K. Ray and K.Biradha By Angew. Chem. Int. Ed., 2012 51 - (2012)
CdS-Decorated ZnO Nanorod Heterostructures for Improved Hybrid Photovoltaic Devices Tamita Rakshit, Suvra P. Mondal, Indranil Manna, and Samit K. Ray By ACS Appl. Mater. Interfaces 4 - (2012)
Room temperature infrared photoresponse of self assembled Ge/Si (001) quantum dots grown by molecular beam epitaxy R., Ray S. K. By Applied Physics Letters - (2010)
Electrical properties of SrBi2Ta2O9 thin films deposited on Si(100) substrates by rf magnetron sputtering Roy A., Jha G. , Dhar A. , Manna I. , Ray S. K. By Indian Journal of Engineering and Materials Sciences 167-170 (2008)
Effect of annealing temperature on the structural and electrical properties of SrBi2Ta2O9 thin films for memory based applications Jha G., Roy A. , Dhar A. , Manna I. , Ray S. K. By Physica B: Condensed Matter 400 33-37 (2007)

Conferences

Doping-induced phase transformation in all-inorganic perovskite CsPbI 3 with enhanced structural and optical stability Bose S., Mahato S. , Roy B. , Ghorai A. , Srivastava S. K., Das N. C., Ray S. K. By IEEE International Conference on Emerging Electronics (ICEE) - (2022)
Room Temperature Detection of Formaldehyde with Economical and Ecofriendly Graphene Quantum Dot Ink Treated Paper-Based Sensor Das S., Chakrabarty P., Dey T., Santra S., Das S., Ray S.K. By Lecture Notes in Bioengineering 265-276 (2021)
Exotic ultrafast optical nonlinearity in reduced graphene oxide via comprehensive dual beam approach Bhattacharya S., Raval S., Ghorai A., Karmakar M., Dey A., Midya A., Ray S.K., Datta P.K. By Proceedings of SPIE - The International Society for Optical Engineering 10672 - (2018)
Volatile Aroma Sensing Performance of High Quality Pristine Graphene, obtained via a facile Exfoliation technique Sinha T.K., Maiti R., Adhikari B., Ray S.K. By Materials Today: Proceedings 5 9888-9891 (2018)
Broadband absorption in Au nanoparticle-decorated chlorophyll b for biophotonic applications Mondal H., Chakrabarty P., Sarkar A., Gangopadhyay G., Basori R., Ray S.K. By 2018 4th IEEE International Conference on Emerging Electronics, ICEE 2018 - (2018)
Humidity Sensing of Zinc Oxide Nanorods Based Prototype Using Arduino Uno Microcontroller Platform Santra S., Jana U., Pal S., Ray S.K. By Proceedings of IEEE Sensors 2018-October - (2018)
Carbon-dots embedded glass based inverse micropillar structures by two-photon polymerization process Das P., Wan M., Mukherjee S., Ray S.K., Shivakiran Bhaktha B.N. By Optics InfoBase Conference Papers Part F114-FIO 2018 - (2018)
Carbon-dots Embedded Glass Based Inverse Micropillar Structures by Two-photon Polymerization Process Das P., Wan M. , Mukherjee S. , Ray S. K., N S. B. By Frontiers in Optics: The OSA Annual Meeting and Exhibit/Laser Science - (2018)
A Flexible Room Temperature Ammonia Sensor Based on Large Area, Transparent Single Wall Carbon Nanotube Thin Film Santra S., Sinha A.K., Ray S.K. By Proceedings of IEEE Sensors 2018-October - (2018)
Effect of size confinement in C exciton dynamics of few-layered MoS2 nano-sheets Karmakar M., Bhattacharya S., Mukherjee S., Chowdhury R.K., Ray S.K., Datta P.K. By Proceedings of SPIE - The International Society for Optical Engineering 10673 - (2018)
Studies on carbon dots embedded Tamm plasmon polariton structures Das P., Mukherjee S., Wan M., Ray S.K., Bhaktha S.B.N. By Proceedings of SPIE - The International Society for Optical Engineering 10683 - (2018)
Studies on carbon dots embedded Tamm plasmon polariton structures Das P., Mukherjee S. , Wan M. , Ray S. K., Bhaktha Bn S. By Photonics Europe - (2018)
Temperature Tunable Selectivity of NiO/Fe x Ni (1-x) O Heterojunction Device Based VOC Sensor Dey S., Santra S., Ray S.K., Guha P.K. By Proceedings of IEEE Sensors 2018-October - (2018)
Temperature Tunable Selectivity of NiO/FexNi(1-x)O Heterojunction Device Based VOC Sensor Dey S., Santra S. , Ray S. K., Guha P. K. By IEEE Sensors 2018 1-4 (2018)
Chemically synthesized CuxNi(1-x)O hierarchical nanostructures as room temperature humidity sensors Dey S., Santra S. , Ray S. K., Guha P. K. By EMRS Spring Meeting - (2017)
Photon assisted ultra-selective Formaldehyde sensing by defect induced NiO nanostructured sensing layer Dey S., Santra S. , Sen S. , Burman D. , Ray S. K., Guha P. K. By IEEE Sensors Conference - (2017)
RGO/Ni2O3 composites as a multifunctional material for efficient water quality monitoring Kar A., Dey S. , Santra S. , Ray S. K., Guha P. K. By EMRS Spring Meeting - (2017)
Integration of Au-SnO2 Nanocomposites with Power Efficient MEMS Substrate for Acetone Sensing Santra S., Luca A. , Guha P. K., Udrea F. , Ray S. K., Gardner J. W. By IEEE Sensors Conference - (2017)
Few-layered graphene oxide embedded 1DPhC microcavity for amplified spontaneous emission source Das P., Maiti R. , Baratto C. , Sberveglieri G. , Bhaktha Bn S. , Ray S. K. By Graphene 2016 - (2016)

Symposium

Plasmonic and polarization effects in a strongly scattering random laser Yadav R., Pal S. , Jana S. , Ray S. K., Brundavanam M. M., N S. B. By National Laser Symposium NLS-31 1-1 (2022)
Plasmonic Au-Nanoislands Mediated Enhanced Photoresponse of 2D MoSe2 Nanoflakes/1D ZnO Nanorods Mixed-Dimensional Heterostructure Jana S., Pal S. , N S. B., Ray S. K. By National Laser Symposium NLS-31 1-1 (2022)

Workshop

Optically tuned many-body phenomena in atomically thin two dimensional WS2 Das S., Chowdhury R. K., Karmakar D. , Das S. , Ray S. K. By XXI International Workshop on Physics of Semiconductor Devices - (2021)

Book Chapter/Section

Shape and sized control ZnO nanostructures for multifunctional devices Ray S. K., Gogrula N. , Rakshit T. By Semiconductor Nanocrystals and Metal Nanoparticles Physical Properties and Device Applications - (2017)

Book

Strained Silicon Heterostructures : Materials and Devices Institution of Electrical Engineers, c2001. IEE circuits, devices and systems series ; no. 12, ISBN. 0852967780 C.K. Maiti, N.B. Chakrabarti and S.K. Ray By IEE Circuits, Devices and Systems Series ; no. 12, - (2001)