rdwivedi.ece's picture
Dr. Ramashray Dwivedi
Institute Associate Professor
Department of Electronics Engineering Indian Institute of Technology
rdwivedi.ece@iitbhu.ac.in
542-2575979
Area of Interest: 
Microsensors, Microelectronic, VLSI Design, Photovoltaics

R. Dwivedi received his Ph.D. degree in Electronics Engineering in 1978 from Banaras Hindu University, India. He worked as a lecturer in the Department of Electronics Engineering for about 6 years, and has been a reader in the same department since April 1986. He has more than 34 years of research experience in the area of microelectronics and solid-state device technology. He has over 130 research publications in the proceedings of symposia. He is currently working in the areas of sensors based on silicon and thick film technologies, MOS devices, and LSI/VLSI. 

Research Areas

  • Microsensors
  • Microelectronics
  • VLSI Design
  • Photovoltaics

​Courses

UG Level

  • IC Technology
  • Analysis and Design of ICs
  • Software Lab & EWS

PG Level

  • Hybrid Integrated Circuit
  • Project/Lab
Selected Research Publications
  • Sunny, Vinod Kumar, V. N. Mishra, R. Dwivedi and R. R. Das, “Classification and Quantification of Binary Mixtures of Gases/Odors Using Thick Film Gas Sensor Array Responses”, IEEE Sensors Journal, Vol. 15, No. 2, pp.1252-1260, February 2015.
  • Sunny, Vinod Kumar, V. N. Mishra, R. Dwivedi and R. R. Das, “Role of Exposure and Recovery Transients in Classification of Gases/Odors with Thick Film Sensor Array”, IEEE Transaction on Nanotechnology, Vol. 13, Iss. 6, pp 1266-1272 Nov. 2014
  • Sunny, V. N. Mishra, R. Dwivedi and R. R. Das, “Quantification of Individual Gases/Odors Using Dynamic Response of Gas Sensor Array with ASM Feature Technique”, IEEE Sensors Journal, Vol. 14, No.4, pp. 1006-1011, April 2014.
  • Sunny, R. Kumar,V. N. Mishra, R. Dwivedi and R. R. Das,“A Dynamic Response, Transformed cluster Analysis and Radial Basis Function Neural Network Based Gases/Odors Identification Approach Using a Thick Film Gas Sensor Array”, Journal of
    Computational and Theoretical Nanoscience, Vol. 11, No. 4, pp. 1199-1204, 2014.
  • Vinod Kumar, Sunny, Ishpal Rawal, V.N. Mishra, R. Dwivedi, R.R. Das, “Fabrication and Characterization of Gridded Pt/SiO2/Si MOS Structure for Hydrogen and Hydrogen Sulphide Sensing”, Journal of Materials Chemistry and Physics, Vol. 146, Iss. 3, pp.- 418-424, 2014.
  • Vinod Kumar, Sunny, V.N. Mishra, R. Dwivedi, R.R. Das, “Influence of gridded gate structure on gas sensing behavior of hydrogen”, Journal of Applied Physics, Vol. 115, 204514-1- 5, 2014.
  • J.K. Srivastava, Preeti Pandey,V. N. Mishra and R. Dwivedi, “PbO-doped SnO2 Sensor  for detection of methanol and propanol”, Russian journal of applied chemistry (Communicated).
  • Preeti Pandey, J.K. Srivastava, V. N. Mishra and R. Dwivedi, “Pd- gate MOS sensor for detection of methanol and propanol”, Journal of natural gas chemistry,20, 2011,123-127.
  • ​J.K. Srivastava, Preeti Pandey, Sunil K. Jha,V. N. Mishra and R. Dwivedi,“Chemical  Vapor Identification by Plasma Treated Thick Film Tin Oxide Gas Sensor Array and   Pattern Recognition”, Sensors and Transducers, Vol.125, Issue 2, Feb 2011,42-53.
  • ​J.K. Srivastava, Preeti Pandey,V. N. Mishra and R. Dwivedi, “Structural and microstructural properties of PbO-doped SnO2 sensor for detection of methanol, propanol and acetone”, Journal of natural gas chemistry, 20, 2011,179-183.
  • Preeti Pandey, J.K. Srivastava, V. N. Mishra and R. Dwivedi, “Effect of RF and    Microwave oxygen plasma on hydrogen sensitivity of Pd gate MOS sensor”, Solid state sciences, 12, 2010, 1540-1546.
  • Abhishek Pandey, J. K. Srivastava, N. S. Rajput, and R. Prasad, “Crop Parameter by using different Neural Network Training Algorithms”, Russian Agricultural Sciences, Vol.36, Issue 1, 2010, pp 71.
  • J.K. Srivastava, Preeti Pandey,V. N. Mishra and R. Dwivedi, “Improvement in the sensitivity of PbO doped tin oxide thick film gas sensor by RF and microwave oxygen plasma treatment”, Sensors and Transducers, Vol. 118, Issue 7, July 2010, pp. 122-130
  • J.K. Srivastava, Preeti Pandey,V. N. Mishra and R. Dwivedi, “Nature of Dopants and  Effects on Sensitivity of SnO 2 Based Gas Sensor”, IETE Journal of Research, Vol 55,  Issue 6, 2009, pp 299-303.
  • Preeti Pandey, J.K. Srivastava, V. N. Mishra and R. Dwivedi, “Hydrogen and Methane Response of Pd Gate MOS Sensor”, Sensor & Transducers Journal, Vol. 103, Issue 4, April 2009, pp.171-179.
  • J.K. Srivastava, Preeti Pandey, V. N. Mishra and R. Dwivedi, “Sensing mechanism of Pd-doped SnO2 sensor for LPG detection”, Solid State Sciences, 11, 2009, 1602–1605
  • J.K. Srivastava, Preeti Pandey,V. N. Mishra and R. Dwivedi, “Optimization of Firing Temperature of PbO-doped SnO2 Sensor for detection of Acetone, Methanol, Propanol”, Sensors & Transducers Journal, Vol. 107, Issue 8, August 2009, pp. 92-98.
  • Chaturvedi, V. N. Mishra, R. Dwivedi and S. K. Srivastava, “Selectivity and sensitivity studies on plasma treated thick film tin oxide gas sensors”, Microelectronics Journal , vol 31, Issue 4, pp 283-290, April 2000
  • R. Srivastava, R. Dwivedi and S.K. Srivastava, “Development of high sensitivity based tin oxide gas sensors for gas/odour detection at room temperature”, Sensors and Actuators, vol 50, pp.175– 180, 1998
  • R. Srivastava, R. Dwivedi and S.K. Srivastava, Effect of oxygen and hydrogen plasma treatment on the room temperature sensitivity of SnO2 gas sensors. Microelectronics Journal, vol 29, pp. 833–838, 1998
  • S.K. Srivastava, R. Srivastava, R. Dwivedi, R. Srivastava, “Development and characterisation of palladium doped tin oxide thick film paste for gas sensors”, IETE Journal of Research, vol.43, no.2-3, pp.215-20, March-June 1997
  • R. K. Chanana, H. N. Upadhyay, R. Dwivedi, S K. Srivastava, “Effect of low and high temperature annealing on the electrical properties of pure N2O/SiH4 PECVD SiO2 deposited at a high rate”, International Journal of Electronics, vol.80, no.4, pp.525-32, April 1996
  • R. K. Chanana, H. N. Upadhyay, R. Dwivedi, S K. Srivastava, “Electrical properties of 6.3 nm RF oxygen plasma oxide grown near room temperature with in situ dry cleaning of Si surface”, SolidState Electronics, vol.38, no.5, pp.1075-80, May 1995
  • M. S. Nayak, R. Dwivedi, S. K. Srivastava, “Integrated sensor array for detection of alcohols and alcoholic beverages”, Journal of the Institution of Engineers (India) Electronics and Telecommunication Engineering Division, vol.75, pp.94-8, March 1995
  • H. N. Upadhyay, R. K. Chanana, R. Dwivedi, S. K. Srivastava, “Fowler-Nordheim emission and electron trapping in pure N2O/SiH4 PECVD oxide deposited on N2, H2 and O2 plasma precleaned Si wafers”, Solid-State Electronics, vol.37, no.9, p.1671-2, Sept. 1994 
  • M. S. Nayak, R. Dwivedi, S. K. Srivastava, “Ratio method for single component gas analysis using doped tin oxide thick film sensors”, Journal of the Institution of Electronics and Telecommunication Engineers, vol.40, no.2-3, p.93-5 , March-June 1994
  • R. K. Chanana, R. Dwivedi, S. K. Srivastava, “Effect of annealing and plasma precleaning on the electrical properties of N2O/SiH4 PECVD oxide as gate material in MOSFETs and CCDs”, SolidState Electronics, vol.36, no.7, pp.1021-6, July 1993
  • P. Rai, R. Dwivedi, S. K. Srivastava, “Negative bias instability in silicon dioxide films grown using oxidise-etch-oxidise process”, Solid-State Electronics, vol.35, no.11, pp.1645-7, Nov. 1992
  • R. K. Chanana, R. Dwivedi, S. K. Srivastava, “Silicon wafer cleaning with CF4/H2 plasma and its effect on the properties of dry thermally grown oxide”, Solid-State Electronics, vol.35, no.10, pp.1417-21, Oct. 1992
  • R. K. Chanana, R. Dwivedi, S. K. Srivastava, “Silicon wafer cleaning with CF4/H2 plasma and its effect on the properties of dry thermally grown oxide”, Solid-State Electronics, vol.35, no.10, pp.1417-21, Oct. 1992
  • R. K. Chanana, R. Dwivedi, S. K. Srivastava, “Study of electrical properties of SiO2 grown over plasma-cleaned silicon surfaces”, Solid-State Electronics, vol.34, no.12, pp.1463-5, Dec. 1991
  • R. K. Chanana, R. Dwivedi, S. K. Srivastava, “Study of electrical properties of SiO2 grown over plasma-cleaned silicon surfaces”, Solid-State Electronics, vol.34, no.12, pp.1463-5, Dec. 1991
  • L. Yadava, R. Dwivedi, S. K. Srivastava, “A titanium dioxide-based MOS hydrogen sensor”, Solid-State Electronics, vol.33, no.10, pp.1229-34, Oct. 1990 • L. Yadav, P. K. Yadava, R. Dwivedi, S. K. Srivastava, “Hydrogen gas micro sensor based on SiO2 and TiO2 systems”, Journal of the Institution of Electronics and Telecommunication Engineers, vol.36, no.3-4, p.195-7, May-Aug.1990
  • R. K. Chanana, R. Dwivedi, S. K. Srivastava, “Nature and mechanism for plasma deposition of thin amorphous films”, Journal of the Institution of Electronics and Telecommunication Engineers, vol.36, no.3-4, pp.175-82, May-Aug. 1990
  • Vishnoi, R. Gopal, R. Dwivedi, S. K. Srivastava, “Measurement of minority carrier lifetime of solar cells using surface voltage and current transients”, Solid-State Electronics, vol.33, no.4, pp.411-17, April 1990
  • K. Sharma, R. Gopal, R. Dwivedi, S. K. Srivastava, “Modified lumped series resistance model of solar cells under shadow conditions”, Solid-State Electronics, vol.33, no.3, pp.309-12, March 1990
  • Vishnoi, R. Gopal, R. Dwivedi, S. K. Srivastava, “Combined effect of non-uniform illumination and surface resistance on the performance of a solar cell”, International Journal of Electronics, vol.66, no.5, p.755-74, May 1989
  • Vishnoi, R. Gopal, R. Dwivedi, S. K. Srivastava, “Studies of surface voltage and current transients in solar cells for accurate evaluation of minority carrier lifetime”, Solid-State Electronics, vol.32, no.1, pp.17-24, Jan. 1989
  • R. Gopal, R. Dwivedi, S. K. Srivastava, “Theoretical investigations of experimentally-observed open-circuit voltage-decay (OCVD) curves, Solid-State Electronics, vol.26, no.11, pp.1101-9, Nov. 1983
  • R. Dwivedi, S. K. Srivastava, “Sintered cadmium sulphide photo-voltaic cell”, Journal of the Institution of Electronics and Telecommunication Engineers, vol.25, no.3, pp.70-2, March 1979
Dr. R. Dwivedi
Sl. No. Name of the Students Thesis Title Year
  1.  
 Vinod Kumar Choudhary Fabrication and characterization of gridded gate Pt/SiO2 MOS Sensors for Hydrogen and Hydrogen containing gases 2015
2. Sunny Classification  and  qualification  of individual/Mixture  of  Gases/  Orders with  soft  Computational  Techniques using SnO2 based Thick Film Array 2015
3. Meenakshi Choudhary Synthesis and Characterization of doped Tin Oxide based Thick Film Sensors Arrays for detection of Gases 2013
4. J. K. Srivastava Investigation of doped Tin oxide based Thick film gas sensor/arrays for  detection of Gases/ organic vapours 2011
5. Preeti Pandey Development and Characterization of Pd-Gate MOS Sensor for Hydrogen, Methanol and Propanol detection 2010
6. R. R. Das NEURO-FUZZY classifications for identification of Gases/odours.
.		 2005
7. Aparna Chaturvedi Effect of Plasma treatment on the performance of Thick Film Tin oxide gas/odour sensor array 2000
8. Ravi Kumar Design, Fabrication and characterization of MOS Invertor and Nano Gates 1994
9. Pradip Kumar Yadav Some studies on IC compatible MOS capacitor & MOSFET Hydrogen sensors 1993
10. Ruby Agarwal Modelling of Ion implanted MOS FET and some studies on n-MOS invertor and magnetic sensor (MAGFET) 1992
11. M.S. Nayak Development of thick film gas sensor arrays and discrimination techniques for the realization of intelligent gas sensor 1992
12, Arti Vishnoi Performance studies and evaluation of minority carrier and life time of silicon solar cell 1989
13. Ram Gopal Some studies on thick cadmium sulphide film and silicon solar cells 1985
14. Ravi Kumar Application of soft computational techniques for identification/quantification of gases/odours using response of tin oxide based sensor arrays  
15. H. N. Upadhyay    
16. Rupali  Srivastava    
17. Rajeev Srivastava    
18. Devesh Dwivedi