Courses

Dr. Chandra Shekhar Prajapati

Dr. Chandra Shekhar Prajapati
Assistant Professor
Department of Physics

Ph.D. (MNNIT Allahabad)
Ph: +91-6115-233 141
shekhar[*AT]iitp.ac.in
https://shekharmsc09.wixsite.com/drcsp
Research Areas
    • MEMS Integrated Gas Sensors
    • Non-invasive Gas-Bio-sensing
    • Sensors for Space Applications
    • Nanomaterials Synthesis & Characterization
    • Nanostructures thin film growth
Other Interests

  • Cricket, Badminton, Lawn tennis, Table tennis, Cycling
Courses taught at IIT P

  • Theory:

    • PH1101/PH1201: Physics (B.Tech.)
    • EP305: Semiconductor Devices and Applications (B.Tech.)
    • PH103(T): Physics (B.Tech.)
    • PH601: Nanoscience (M.Sc. & Ph.D.)

    Laboratory:

    • PH110: Physics (B.Tech.)
    • EP362: Advanced Physics Lab (B.Tech.)
    • PH440: General Physics Lab (M.Sc.)
Students
Sr. No. Photo Area of Reasearch Degree
1
Rohit Kumar (2321PH16)
 Ph.D.
2
Ankita Chakraborty (2421PH06) (Joinly with Dr. Manoranjan Kar)
 Ph.D.
3
Devendra Kumar Kanwar (2312PH09) M.Sc. Project Started July 2024
 Development of nanostructured WO3 thin films for NO detection M.Sc.
4
KOMMUNURI ELISHA JOEL (2101PH18) B.Tech Project Started July 2024
 Development of 2-in-1 pressure and Temperature sensor B.Tech.
Former Students
Sr. No. Photo Area of Reasearch Current Position
1
Vijendra Kumar Tripathi (M.Sc. Thesis)
Understanding and Measurement of PM2.5 and PM10 Particles and their Health Impact
2
Ashutosh Sharma (M.Sc. Thesis)
 Investigation on Breath Analysis using Gas Sensors
Current Sponsored Projects
Sr. No. Title Principal Investigator Co-Principal Investigator Duration Sponsoring Agency Cost Status
1 Colloidal Lithography assisted nanostructures fabrication of Metal-oxides to Develop gas sensor for CO2, NO2, NH3, H2S & CO air Pollutants Dr. Chandra Shekhar Prajapati 2 Years SERB, New Delhi 33.11 Lakhs On-going
Professional Experience
    • November 2022 – Present: Assistant Professor at IIT Patna
    • April 2018 – November 2022: DST- Inspire Faculty at CeNSE, IISc Bangalore
    • January 2014 – April 2018: Postdoctoral Fellow at CeNSE, IISc Bangalore
    • March 2013 – December 2013: Project Associate at CeNSE, IISc Bangalore
Administrative Experience

  •  

    • Warden Dr. A.P.J. Abdul Kalam Hostel (June 2024 to Present)
    • Warden Dr. C.V. Raman & Married Scholars Hostel (June 2023 to June 2024)
    • PhD coordinator PHYSICS (Jan 2023 to Jan 2024)
    • Time-Table coordinator PHYSICS (Jan 2023 to May 2024)
Awards & Honours
    • Inspire Faculty Award - DST/INSPIRE/04/2017/003049
    • Dr. D.S. Kothari Postdoctoral Fellowship (UGC) – PH/12-13/0074 (Didn’t avail)
    • Sir C.V. Raman Commemoration, 2010, Gold Medal (Awarded by Kanpur University)
    • Kailashpat Singhania,2010, Gold Medal (Awarded by Kanpur University)
Books
    • Baloria V., Prajapati C.S., Bhat N., Gupta G. (13th June 2020), Chemiresistors and Their Microfabrication, Functional Nanomaterials, Springer, Singapore. DOI: https://doi.org/10.1007/978-981-15-4810-9
      ISBN: 978-981-15-4810-9
Patents
    • Nano-Sensor for Detecting Gaseous Components, Chandra Shekhar Prajapati and Navakanta Bhat, US 11,275,043 B2, Granted (15-03-2022)
    • Methods of Fabrication of Nano-Sensor and Nano-Sensor Array, Chandra Shekhar Prajapati and Navakanta Bhat, US 12,078,605 B2,  (Granted on 03-09-2024)
Publications / Journals

  • Journal Publications:

    • Jitthu Joseph, G Uma, M Umapathy, C. S. Prajapati, M Manjunatha Nayak, Development and Optimization of an Algorithm for Accurate Estimation of Real-Time Hydrogen Concentration Using a ZnO-Based Gas Sensor, Journal of Analytical Chemistry, 8 (2023) 1062 - 1069. https://link.springer.com/article/10.1134/S1061934823080087
    • Jitthu Joseph, C. S. Prajapati, G Uma, M Umapathy, M Manjunatha Nayak, Hydrogen Detection Using ZnO-Based Thin Film MEMS Integrated Sensor Chip, IEEE (2023) 6-64. 2023 International Conference on Advanced & Global Engineering Challenges (AGEC) https://ieeexplore.ieee.org/abstract/document/10327899  
      •  
    • C.S. Prajapati, S.N. Pandey and P.P. Sahay, Sensing of LPG with nanostructured zinc oxide thin films grown by spray pyrolysis technique, Physica B: Condensed Matter, 406, Issue 13, (1 July, 2011) 2684-2688, DOI: 10.1016/j.physb.2011.02.075, Impact Factor – 2.988, ISSN: 0921-4526
      http://www.sciencedirect.com/science/article/pii/S0921452611003279
      •  
    • C.S. Prajapati and P.P. Sahay, Growth, structure and optical characterization of Al-doped ZnO nanoparticle thin films, Crystal Research and Technology, 46, Issue 10, (22 July, 2011) 1086-1092,
      DOI: 10.1002/crat.201100192, Impact Factor – 1.599, 1521-4079
      http://onlinelibrary.wiley.com/doi/10.1002/crat.201100192/abstract
      •  
    • C.S. Prajapati and P.P. Sahay, Alcohol-sensing characteristics of spray deposited ZnO nano-particle thin films, Sensors and Actuators B: Chemical, 160, Issue 1, (15 December 2011) 1043 – 1049, DOI: 10.1016/j.snb.2011.09.023, Impact Factor – 9.221, 0925-4005
      http://www.sciencedirect.com/science/article/pii/S0925400511008252
      •  
    • C.S. Prajapati and P.P. Sahay, Effect  of  precursors  on structure,  optical  and  electrical  properties  of  chemically  deposited nanocrystalline ZnO thin films, Applied Surface Science, 258, Issue 7, (12 January 2012) 2823-2828, DOI:10.1016/j.apsusc.2011.10.141, Impact Factor – 6.707, 0169-4332
      http://www.sciencedirect.com/science/article/pii/S0169433211017296
      •  
    • C.S. Prajapati and P.P. Sahay, Influence  of  In  doping  on  the  structural,  optical  and  acetone  sensing  properties  of  ZnO nanoparticulate thin films, Materials Science in Semiconductor Processing, 16, Issue 1, ­(19th May 2012) 200 – 210, DOI: 10.1016/j.mssp.2012.04.015, Impact Factor – 4.644, 1369-8001
      http://www.sciencedirect.com/science/article/pii/S1369800112000601
      •  
    • C.S. Prajapati, Ajay Kushwaha and P.P. Sahay, Optoelectronics and formaldehyde sensing properties of tin-doped ZnO thin films, Applied Physics A: Materials Science & Processing, 113, Issue 2013, (7 February 2013) 651 – 662, DOI: 10.1007/s00339-013-7589-3, Impact Factor – 2.983, 0947-8396
      http://link.springer.com/article/10.1007/s00339-013-7589-3
      •  
    • C.S. Prajapati, Ajay Kushwaha and P.P. Sahay, Influence of Fe doping on the structural, optical and acetone sensing properties of sprayed ZnO thin films, Materials Research Bulletin, 48, Issue 7, (26th March 2013) 2687-2695, DOI: 10.1016/j.materresbull.2013.03.026, Impact Factor – 4.641, 0025-5408
      http://www.sciencedirect.com/science/article/pii/S0025540813002134
      •  
    • C.S. Prajapati, Ajay Kushwaha and P.P. Sahay, Effect of Al dopants on the structural, optical and gas sensing properties of spray-deposited ZnO thin films, Materials Chemistry and Physics, 142, Issue 1, (15 October 2013) 276-285, DOI: 10.1016/j.matchemphys.2013.07.015, Impact Factor – 4.094, 0254-0584
      http://www.sciencedirect.com/science/article/pii/S0254058413005385
      •  
    • C.S. Prajapati, Ajay Kushwaha and P.P. Sahay, Experimental   investigation   of   spray-deposited   Fe-doped   ZnO   nanoparticle   thin   films: Structural, microstructural and optical properties, Journal of Thermal Spray Technology, 22 (8 August 2013) 1230-1241, DOI: 10.1007/s11666-013-9973-0, Impact Factor – 2.757, 1059-9630
      http://link.springer.com/article/10.1007/s11666-013-9973-0
      •  
    • R. Mukherjee, C.S.  Prajapati, P.P. Sahay, Tailoring the microstructural, optical, and electrical properties of nanocrystalline WO3 thin films using al doping, journal of materials engineering and performance, 23 (7 June 2014) 3141-3151, doi: 10.1007/s11665-014-1094-5, impact factor – 1.819, 1059-9495
      http://link.springer.com/article/10.1007/s11665-014-1094-5
      •  
    • R. Mukherjee, C.S.  Prajapati, P.P. Sahay,Tin-incorporation induced changes in the microstructural, optical, and electrical behavior of tungsten oxide nanocrystalline thin films grown via spray pyrolysis, journal of thermal spray technology, 23, 2014, (12th august 2014), 1445-1455, doi: 10.1007/s11666-014-0134-x, impact factor – 2.757, 1059-9630
      http://link.springer.com/article/10.1007/s11666-014-0134-x
      •  
    • C. S. Prajapati*, Rohith soman, S. B. Rudraswamy, M. Nayak and Navakanta bhat, Single chip gas sensor array for air quality monitoring, , Journal of Microelectromechanical Systems, 26, issue 2, (20th February 2017) 433 -439, doi: 10.1109/jmems.2017.2657788, impact factor – 2.829, 1057-7157
      http://ieeexplore.ieee.org/document/7859261/
      •  
    • C. S. Prajapati*, dennis visser, srinivasan anand and navakanta bhat, Honey-comb type ZnO nanostructures for sensitive and selective CO detection, sensors and actuators b: chemical 252, 2017, (12th June 2017) 764 – 772, DoI: 10.1016/j.snb.2017.06.070, impact factor – 9.221, 0925-4005
      http://www.sciencedirect.com/science/article/pii/s0925400517310912
      •  
    • D. Visser, Z. Ye, C. S. Prajapati, N. Bhat, S. Anand, Investigations of sol-gel ZnO films nanostructured by reactive ion beam etching for broadband anti-reflection, ECS journal of solid-state science and technology, 6 (9) p653-p659 (14th September 2017), Doi: 10.1149/2.0331709jss, impact factor – 2.070, 2162-8777
      https://iopscience.iop.org/article/10.1149/2.0331709jss
      •  
    • C. S. Prajapati* and Navakanta Bhat,Self-heating oxidized suspended Pt nanowire for high-performance hydrogen sensor, Sensors and Actuators B: Chemical, 260, 2018, (1st may 2018) 236 – 242, doi: 10.1016/j.snb.2017.12.180, impact factor – 9.221, 0925-4005
      https://www.sciencedirect.com/science/article/pii/s0925400517325169
      •  
    • R.K. Mishra, C.S. Prajapati, R.R. shani, A.K. kushwaha, P.P.  Sahay, Influence of electrodeposition modes on the electrochemical performance of MnO2 films prepared using anionic MnO4− (Mn7+) precursor ceramics international, 44, issue 5, (1st april 2018) 5710-5718, doi: 10.1016/j.ceramint.2017.12.224, Impact factor – 5.532, 0272-8842
      https://www.sciencedirect.com/science/article/pii/s0272884217329309
      •  
    • C. S. Prajapati* and Navakanta Bhat, Ppb level detection of NO2 using WO3 thin film based sensor: material optimization, device fabrication and packaging, RSC Advances, 8, 2018, ( 9th February 2018) 6590 -6599. Doi: 10.1039/c7ra13659e, impact factor – 4.036, 2046-2069
      http://pubs.rsc.org/en/content/articlelanding/2018/ra/c7ra13659e#!divabstract
      •  
    • R.K. mishra, C.S. Prajapati, P.P. Sahay, Super-capacitive performance of electrochemically synthesized nanocrystalline NnO2 films using different plating solutions: a comparative study, Journal of Alloys and Compounds, 749, issue 5, (1st april 2018) 172-179, doi: 10.1016/j.jallcom.2018.03.271, impact factor – 5.316, 0925-8388
      https://www.sciencedirect.com/science/article/pii/s0272884217329309
      •  
    • C. S. Prajapati*, and Navakanta Bhat, Highly sensitive co sensor based on thickness-selective ZnO thin film: device fabrication and packaging, crystal research & technology, 54, issue 4, (28th January 2019), 1800241, doi: 
      10.1002/crat.201800241      , impact factor – 1.639, 1521-4079
      https://onlinelibrary.wiley.com/doi/full/10.1002/crat.201800241
      •  
    • Anil Kumar, C. S. Prajapati, P. P. Sahay, Modification in the microstructural and electrochromic properties of spray-pyrolyzed WO3 thin films upon Mo doping, Journal of sol-gel science and technology, 90, 2019, (14th march 2019), 281-295, doi: 10.1007/s10971-019-04960-1, impact factor – 2.326, 0928-0707
      https://link.springer.com/article/10.1007/s10971-019-04960-1
      •  
    • Anil kumar, C. S. Prajapati, P. P. Sahay, Results on the microstructural, optical and electrochromic properties of spray deposited MoO3 thin films by the influence of W doping, Materials Science in Semiconductor Processing, 104, 2019, (14th august 2019) 104668, DOI: 10.1016/j.mssp.2019.104668, impact factor – 4.644, 1369-8001
      https://www.sciencedirect.com/science/article/abs/pii/s136980011931087x
      •  
    • C. S. Prajapati*, S. Benedict and Navakanta Bhat, An ultra-low power nanosensor array for selective detection of air pollutants, Nanotechnology, 31, 2,  (10 October 2019) 025301. Doi: 10.1088/1361-6528/ab44fd, impact factor – 3.953, 1361-6528
      https://iopscience.iop.org/article/10.1088/1361-6528/ab44fd/meta
      •  
    • Sujoy Ghosh, M.S. Ilango, C. S. Prajapati*, navakanta bhat, Reduction of humidity effect in WO3 thin film based NO2 sensor using physiochemical optimization, crystal research & technology, 56, 1, (27th november 2020) 2000155,
      doi: 10.1002/crat.202000155, impact factor – 1.599 , 1521-4079
      https://onlinelibrary.wiley.com/doi/abs/10.1002/crat.202000155
      •  
    • Anuj Jain, Ravi Kant Baranwal, Ajaya Bharti, Z. Vakil, and C.S. Prajapati, Study of Zn-Cu Ferrite Nanoparticles for LPG Sensing, The Scientific World Journal, 2013 (20th June 2013) pp 7, DOI: 
      10.1      155/2013/790359, Impact Factor – 2.400, ISSN: 2356-6140
      https://www.hindawi.com/journals/tswj/2013/790359/abs/

    Conference Publications:

    • Studies on Metal-Oxide Semiconductor ZnO as a Hydrogen Gas Sensor C.S. Prajapati and P.P. Sahay J. Nano- Electron. Phys. 3, No1, (2011) 714-720. ISSN: 2007-6772
      Conference: International Symposium on Semiconductor Materials and Devices (ISSMD 2011) at M.S. University of Baroda, Vadodara, India (28-30 January 28-30, 2011).
      http://jnep.sumdu.edu.ua/component/search/index.php?option=com_content&task=full_article&id=229
      •  
    • Growth optimization, morphological, electrical and sensing characterizations of V2O5 films to fabricate SO2 sensor C. S. Prajapati, and Navakanta Bhat, IEEE Sensors, 2018. DOI: 10.1109/ICSENS.2018.8589650 Impact Factor – 2.617  
      Conference: 2018 IEEE Sensors at New Delhi, India (28-31 October 2018)
      https://ieeexplore.ieee.org/document/8589650
      •  
    • Activate Zeolite Filter: A gas sensor signal stabilization and enhancement, C.S. Prajapati, MI Sridar, S Benedict, S Ghosh, N Bhat, 2019 IEEE Sensors, 1-4, DOI:10.1109/SENSORS43011.2019.8956758 Impact Factor – 2.617  
      Conference: 2019 IEEE Sensors at Montreal, QC, Canada, Canada, (27-30 Oct. 2019). https://ieeexplore.ieee.org/abstract/document/8956758  
      •  
    • A baseline correction model for humidity and temperature compensationWO3 film based sensor for NO2 detection, S Ghosh, A Ghosh, N Kodavali, C.S. Prajapati, N Bhat, 2019 IEEE SENSORS, Montreal, QC, Canada, 2019, pp. 1-4, DOI: 10.1109/SENSORS43011.2019.8956920 Impact Factor – 2.617  
      https://ieeexplore.ieee.org/abstract/document/8956920
      Conference: 2019 IEEE Sensors at Montreal, QC, Canada, Canada, (27-30 Oct. 2019).
      •  
    • Heterogenous Integration of MEMS Gas Sensor using FOWLP : Personal Environment Monitors, Samatha Benedict; Ashvin Nagarajan; K. Thejas; Arsalan Alam; Murugaiya Sridar Illango; Goutham Ezhilarasu; C. S. Prajapati, Navakanta Bhat, S. Iyer, 2020 IEEE 70th Electronic Components and Technology Conference (ECTC) 3-30 June 2020, Orlando, FL, USA DOI: 10.1109/ECTC32862.2020.00134
      https://ieeexplore.ieee.org/abstract/document/9159428/authors
Conferences
    • Pulse Laser Deposited ZnO thin film: Annealing-dependent study of structural, and morphological properties, Rohit Kumar and C. S. Prajapati, International conference on Energy and environmental materials E2M at IIT Indore, 11th to 13th July 2024.
    • MOS nanostructured Gas sensing for non-invasive breath analysis, Rohit Kumar and C. S. Prajapati, Asia Pacific Conference on Condensed Matter Physics (AC2MP) 2024, IIT Patna, 8th to 11th December 2024.
    • Preparation and Characterization of ZnO nano-particulate thin film, C. S. Prajapati, P. P. Sahay, Presented (Oral) in the 3rd National Symposium for Materials Research Scholars (MR-10) at Indian Institute of Technology Bombay, Mumbai, India (May 7-8, 2010).
    • Studies on metal-oxide semiconductor ZnO as a hydrogen gas sensor, C. S. Prajapati, P. P. Sahay, Presented (Poster) in the International Symposium on Semiconductor Materials and Devices (ISSMD 2011) at M.S. University of Baroda, Vadodara, India (January 28-30, 2011).
    • Studies on alcohol sensing properties of ZnO thin film based sensor, C. S. Prajapati, P. P. Sahay, Presented (Poster) in the National Conference on Sensors and Actuators: Science to technology (NCSA-2011) at Center Glass & Ceramic Research Institute, Kolkata, India (March 11-12, 2011).
    • High acetone sensitivity in In-doped ZnO nanoparticulate thin films, C. S. Prajapati, P. P. Sahay, Presented (Poster) in the International conference on Nanomaterials and Nanotechnology at University of Delhi, India (December 18-21, 2011).
    • Studies of structural and optical properties of In-doped ZnO nanocrystalline thin films, C. S. Prajapati, P. P. Sahay, Presented (Oral) in the International conference on Frontiers of Nanoscience, Nanotechnology and their Applications at Punjab University, Chandigarh, India (February 16-18, 2012).
    • Microstructural and optical Properties of spray deposited nanocrystalline Sn-doped ZnO thin films, C. S. Prajapati, P. P. Sahay, Presented (Poster) in the National symposium on Materials and Processing-2012 (MAP-2012) at Bhabha Atomic Research Center, Mumbai, India (October 10-12, 2012).
    • Microstructural and optical properties of spray deposited nanocrystalline Sn- doped ZnO thin films, C. S. Prajapati, P. P. Sahay, Presented (Oral) in the International Symposium for Research Scholars on Metallurgy (ISRS-2012) at Indian Institute of Technology Madras, Chennai, India (December 13-15, 2012).
    • Nanosensor array development for fast and accurate detection of gases, C. S. Prajapati, Navakanta Bhat, Presented (Oral) in the International Symposium on Physics and Technology of Sensors (ISPTS-2015), 7 to 10 March 2015 at Centre for Materials for Electronics Technology [C-MAT], Pune, India.
    • High sensitivity for Nitrogen Dioxide by Thickness Selective WO3 Thin Film Sensor in Temperature Impulse Mode (ICMAT15-A-0089), C. S. Prajapati, Navakanta Bhat, Presented (Oral) in the International Conference on Materials for Advanced Technologies of the Materials Research Society of Singapore & 4th Photonics Global Conference (ICMAT & IUMRS-ICA 2015), 28 June to 03 July 2015, Material Research Society, Singapore.
Invited Talks
    • MEMS integrated Gas Sensor Development, Chief Guest & Invited Speaker for a DST Sponsored National Seminar on “Advanced Energy Materials and Devices” at the Dayananda Sagar University, Bangalore on Dayanada Sagar Centenary celebrations, 9th July 2022, Bangalore, Karnataka, India.
    • MEMS integrated Gas Sensor Development for Various Applications, Invited Speaker for one day workshop MEMS/NEMS Smart Sensors July 2019, 2022, C-MET, Hyderabad, India.
    • Indigenous Gas Sensors (Sensor Product Talk), Think Nano 2017, 14-15 September 2017, CeNSE, IISc Bangalore, India. http://www.cense.iisc.ac.in/ThinkNano/programSchedule.html
    • Air quality monitoring sensors, in “Brainstorming session on sensors and its effective utilization in environmental monitoring and management”, 20 August 2018, CSIR-NEERI Nagpur, India
    • Sensor Development, “Realtime Nationwide Low-Cost Sensor Network for Air Quality Monitoring”, Ganga Auditorium, Indira Paryavaran Bhavan, Ministry of Environment, Forest and Climate Change, Government Ministry, New Delhi, Date: August 29, 2018. https://indiaaq.blog/2018/08/22/dst-moefcc-workshop-on-realtime-air-quality-monitoring/
    • Air quality monitoring sensors: Towards a miniaturized, low-cost, and scalable technology, 3rd AIR-O-THON - Bangalore Edition, Capitol Hotel, Raj Bhavan Rd, Vasanth Nagar, Bangalore, Date: August 31st, 2018. 
      YouTube link: https://www.youtube.com/watch?v=jzx3M-lBXJc&t=237s
    • Micro to Nano Gas Sensors: Indigenously Developed Technology for Various Applications, International Conference on “Nanomaterials Driven Advances in Chemical and Biosensors” (27th – 29th November 2019), Department of Bioelectronics & BioSensors, Alagappa University, Karaikudi, Tamil Nadu, India.
    • Gas Sensors System: Micro to Nano (Indigenously Developed Technology for Various Applications), “Survival Strategies for the post COVID-19 ERA: Perspective From Science, Technology and Social Science” 20th-26th May 2020, Physics Department at Ewing Christian College, Allahabad University, Allahabad, India.
      Link to video:  https://www.facebook.com/ecc.physics.79/videos/109182897474416/
    • Indigenously Developed Technology for Air Quality Monitoring, Leak detection, and Breath Analysis, ISSS 2020 Public Lecture Webinar, 29th July 2020.
      Link: https://isssonline.in/public-lecture/
    • Indigenously developed Low-Cost Gas Sensors for Air Pollution monitoring, (Closed-door talk by-invitation-only), Ministry of Environment Forest and Climate Change, Government Ministry, New Delhi along with Bloomberg Philanthropies (https://www.bloomberg.org/), 18th December 2020.
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