Dr. Nirmal Ch Roy

Assistant Professor
Department of Electronics & Communication Engineering
Motilal Nehru National Institute of Technology Allahabad, Prayagraj, India-211004
E-mail: nirmalroy[at]mnnit[dot]ac[dot]in
Telephone: NA(O)

Research Publications

Patents:

Nirmal Roy, Shirsendu Mitra, Dipankar Bandyopadhyay, Harshal B. Nemade, Tapas K. Mandal, "Point-of-care detection of ethanol in human breath and other analytes", Indian Patent Office, 446162, 21/08/2023 (Granted)

Rupam Sinha, Nirmal Roy, Tapas K. Mandal, "Paper based flexible and self-powered UV photodetector", Indian Patent Office, 202031051178, 24/11/2020 (Published)

Journals:

Nirmal Roy, Abhinav Gupta, Sanjeev Rai, "Analytical surface potential modeling and simulation of junction-less double gate (JLDG) MOSFET for ultra low-power analog/RF circuits", Microelectronics Journal, 46 (10), 916-922, 2015. DOI: 10.1016/j.mejo.2015.07.009 (IF: 1.992)

Nirmal Roy, Shirsendu Mitra, Nayan Mani Das, Nilanjan Mandal, Dipankar Bandyopadhyay, Harshal B. Nemade, Tapas K. Mandal, "Paper based enzymatic chemiresistor for POC detection of ethanol in human breath", IEEE Sensors Journal, 20 (5), 2278-2286, 2020. DOI:10.1109/JSEN.2019.2952940 (IF: 4.325)

Shirsendu Mitra, Nirmal Roy, Surjendu Maity, Dipankar Bandyopadhyay, "Multimodal chemo-/magneto-/phototaxis of 3G CNT-bots to power fuel cells", Microsystems & Nanoengineering, 6 (19), 1-12, 2020. DOI: 10.1038/s41378019-0122-x (IF: 8.006)

Rupam Sinha, Nirmal Roy, Tapas K. Mandal, "Growth of carbon dot-decorated ZnO nanorods on a graphite-coated paper substrate to fabricate a flexible and self-powered Schottky diode for UV detection", ACS Applied Materials & Interfaces, 12 (29), 33428-33438, 2020. DOI:10.1021/acsami.0c10484 (IF: 10.383)

Nirmal Roy, Rupam Sinha, Thomas T. Daniel, Harshal B. Nemade, Tapas K. Mandal, "Highly sensitive room temperature CO gas sensor based on MWCNT-PDDA composite", IEEE Sensors Journal, 20 (22), 13245-13252, 2020. DOI: 10.1109/JSEN.2020.3004994 (IF: 4.325)

Rupam Sinha, Nirmal Roy, Ravula Rajasekhar, Aabhas Karnawat, Tapas K. Mandal, "N-doped carbon dot from cigarette-tobacco: Picric acid sensing in real water sample and synthesis of CD-MWCNT nano-composite for UV-photodetection", Journal of Environmental Chemical Engineering, 9 (1), 104971, 2021. DOI: 10.1016/j.jece.2020. (IF: 7.968)

Nirmal Roy, Shirsendu Mitra, Harshal B. Nemade, Tapas K. Mandal, "Non-enzymatic urea sensing based on MWCNT nanocomposite", IEEE Sensors Journal, 21 (17), 18417-18424, 2021. DOI: 10.1109/JSEN.2021.3088752 (IF: 4.325)

Rupam Sinha, Nirmal Roy, Tapas K. Mandal, "SWCNT/ZnO nanocomposite decorated with carbon dots for photoresponsive supercapacitor applications", Chemical Engineering Journal, 431, 133915, 2022. DOI: 10.1016/j.cej.2021.133915 (IF: 16.744)

Nirmal Roy, Rupam Sinha, Harshal B. Nemade, Tapas K. Mandal, "Synthesis of MoS2-CuO nanocomposite for room temperature acetone gas sensing application", Journal of Alloys and Compounds, 910, 164891, 2022. DOI:10.1016/j.jallcom.2022 (IF: 6.371)

Rupam Sinha, Nirmal Roy, Tapas K. Mandal, "N-doped carbon dots and ZnO conglomerated electrodes for optically responsive supercapacitor applications", Langmuir, 39 (12), 4518-4529, 2023. DOI:10.1021/acs.langmuir.3c00300 (IF: 4.331)

Nirmal Roy, "Design and performance evaluation of MoS2 photodetector in vertical MSM configuration", Optical Materials, 148, 114817, 2024. DOI:10.1016/j.optmat.2023.114817 (IF: 3.9)

Anupam Srivastava, A V Ullas, Nirmal Roy, "Efficiency enhancement and optimization of lead-free Cs2PtI6 perovskite solar cell", Physica Scripta, 99, 095537, 2024. DOI: 10.1088/1402-4896/ad6d1c (IF: 2.6).

Anupam Srivastava, A V Ullas, Nirmal Roy, "Theoretical design and performance evaluation of a lead-free fully inorganic CIGS solar cell with CuSbS2 as HTL", Journal of Physics and Chemistry of Solids, 196, 112331, 2024. DOI: 10.1016/j.jpcs.2024.112331 (IF: 4.3).

Vivek Dubey, Anupam Srivastava, Rupam Sinha, Nirmal Roy, “Design and optimization of high-performance MoSe2/PC60BM heterostructure based self-powered photodetector”, Material Science & Engineering: B, 314, 118018, 2025. DOI: 10.1016/j.mseb.2025.118018 (IF: 3.9).

Nirmal Roy, “Investigating Cs2SnI6 as a promising material for high-performance self-powered broadband photodetection application”, Journal of Physics and Chemistry of Solids, 203, 112730, 2025. DOI: 10.1016/j.jpcs.2025.112730 (IF: 4.3).

Conference Proceedings:

Nirmal Roy, "Synthesis of surface modified carbon nanotube composite for environmental pollutant sensing application", 7th International Conference on Advanced Nanomaterial and Nanotechnology (ICANN-2021), IIT Guwahati, India, 2021

Nirmal Roy, Rupam Sinha, Tapas K. Mandal, "PDDA functionalized MWCNT composite as room temperature CO sensor", International Conference on Advances in Sustainable Research for Energy and Environmental Management (ASREEM-2021), SVNIT Surat, India, 2021

Rupam Sinha, Nirmal Roy, Tapas K. Mandal, "Paper based flexible and self-powered UV photodetector", International Conference on Advances in Sustainable Research for Energy and Environmental Management (ASREEM-2021), SVNIT Surat, India, 2021

Nirmal Roy, "Paper based sensor for alcohol detection and its application as breath analyzer", International Conference on Advances in Chemical Engineering-2020 (AdChE-2020), UPES Dehradun, India, 2020

Nirmal Roy, "A disposable chemiresistive sensor based on Multiwall carbon nanotubes for alcohol detection", 6th International Conference on Advanced Nanomaterial and Nanotechnology (ICANN-2019), IIT Guwahati, India, 2019

Shirsendu Mitra, Nirmal Roy, and Dipankar Bandyopadhyay, "Gold nanoparticle embedded modified MWCNT electrodes for electrochemical detection of arsenic in water", ECS Meeting Abstracts, MA2019-02, 2229, 2019. DOI: 10.1149/MA2019-02/51/2229

Nirmal Roy, "Surface modification of Multiwall carbon nanotubes and its applications on alcohol detection", National Conference on Advanced Nanomaterials and their Applications (ANA-2018), MNNIT Allahabad, India, 2018

Nirmal Roy, Shirsendu Mitra, Tapas K. Mandal, "Multiwall carbon nanotube based chemi-resistive sensor for urea detection", 12th International Conference on Complex Fluids and Soft Matter (COMPFLU -2018), IIT Roorkee, India, 2018

Nirmal Roy, "MWCNT, AuNP nanocomposite based POCT sensor for quantitative detection of urea in biological samples", Research Conclave 2018, IIT Guwahati, India, 2018

Nirmal Roy, "Computational performance evaluation of a probe coupled U-type waveguide rotary joint designed in X-band", National Conference on Advances in Electronics & Communication Technology (AECT-2013), SRMS College of Engineering & Technology, Bareilly, India, 2013

Anupam Srivastava, AV Ullas, Nirmal Roy, "Advancements in Sustainable Photovoltaic Cells: Exploring the Potential of Single-Walled Carbon Nanotubes", 11th National Conference on Recent Trends in Materials Science and Technology, Thiruvananthapuram, India, 2024

Nirmal Roy, Anupam Srivastava, “Advancing Sustainable Photovoltaics: High-Efficiency Lead-Free Solar Cells Using CIGS, MoS2, and ZnO”, 7th International Conference on VLSI, Communication and Signal Processing (VCAS-2024), MNNIT Allahabad, India, 2024