Dr. Manish Kumar Verma
@pup.ac.in
Assistant Professor
Patna University
Scopus Publications
Scopus Publications
Manish Kumar Verma, Neha Batra, Monika Tomar, and Vinay Gupta
Springer Science and Business Media LLC
ABSTRACTSnO2 based sensor structures prepared by rf magnetron sputtering technique have been studied for detecting H2 gas. Pd catalyst was integrated onto the SnO2 thin film in the form of clusters and nano-particles to obtain enhanced sensing response characteristics. The prepared sensor structures have been studied over a temperature range of 50-250°C for sensing response towards 500 ppm H2 gas. The sensor with Pd catalyst dispersed in the form of nanoparticles was found to exhibit an enhanced sensing response of 1.9×103 at a relatively low operating temperature of 150°C with a fast response time of 2 s and recovery time of 65 s towards 500 ppm H2 gas. The origin of enhanced sensing response is identified in the light of the enhanced spill over of H2 gas molecules on the uncovered surface of SnO2 thin film.
Manish Kumar Verma and Vinay Gupta
Informa UK Limited
SnO2 thin film and SnO2–CuO nanocomposite thin film sensors have been realised by pulsed laser deposition (PLD). The prepared sensor structures have been studied for the sensing response characteristics in the presence of 20 ppm H2S gas. An enhancement in the response was observed from 1.4 × 102 for bare SnO2 thin film sensor to 4.3 × 103 for SnO2–CuO composite sensor with a fast response (t 90) time of about 2 s. The enhanced response has been attributed to the highly porous morphology of the films grown by PLD besides the modulation of space charge region due to spillover of H2S gas molecules on the surface of SnO2 film by the CuO catalyst.
Manish Kumar Verma, S.k. Jha, Prerna Gaur, and A.P. Mittal
IEEE
In this paper the design and development of a control system for three dimensional inverted pendulum is proposed. The 3D inverted pendulum is related to rocket or missile guidance, where the center of gravity is located behind the center of drag causing aerodynamic instability. Three dimensional inverted pendulum is highly non-linear system. The Simulink model of 3D pendulum in this work is associated with the virtual world. Analysis is done on three dimensional inverted pendulum with additional position and angle into a two dimensional inverted pendulum. Comparative study of simulation results of walking control using PID controller and fuzzy logic controller are presented.
Manish Kumar Verma and Vinay Gupta
Institute of Electrical and Electronics Engineers (IEEE)
The sensing response of <formula formulatype="inline"><tex Notation="TeX">${\\rm SnO}_{2}$</tex></formula> thin film sensors loaded with Pd nanoparticles <formula formulatype="inline"><tex Notation="TeX">$({\\rm Pd}\\hbox{-}{\\rm SnO}_{2})$</tex></formula> is studied for <formula formulatype="inline"><tex Notation="TeX">${\\rm H}_{2}$</tex></formula> gas. Nanoparticles of Pd catalyst of varying size (2–6 nm) are synthesized using chemical route with different concentrations of polyvinyl pyrollidone (PVP) as a stabilizing agent and dispersed over the surface of <formula formulatype="inline"><tex Notation="TeX">${\\rm SnO}_{2}$</tex></formula> thin film deposited by rf magnetron sputtering technique. The sensing response of all prepared sensors was recorded over a temperature range of 50<formula formulatype="inline"><tex Notation="TeX">$^{\\circ}{\\rm C}$</tex></formula>–200<formula formulatype="inline"> <tex Notation="TeX">$^{\\circ}{\\rm C}$</tex></formula>. The effect of PVP used for synthesis of Pd nanoparticles has been studied on the sensing response characteristics of <formula formulatype="inline"><tex Notation="TeX">${\\rm Pd}\\hbox{-}{\\rm SnO}_{2}$</tex></formula> sensors. The optimized sensor structure was found to exhibit a higher response <formula formulatype="inline"> <tex Notation="TeX">$(1.9\\times 10^{3})$</tex></formula> at a relatively low operating temperature (150<formula formulatype="inline"> <tex Notation="TeX">$^{\\circ}{\\rm C}$</tex></formula>) with fast response time <formula formulatype="inline"><tex Notation="TeX">$({\\rm t}_{90}\\sim 2~{\\rm s})$</tex></formula> for 500 ppm <formula formulatype="inline"><tex Notation="TeX">${\\rm H}_{2}$</tex></formula> gas. The origin of enhanced sensing response is identified in the light of the interaction of PVP with Pd nanoparticles besides the spill over of <formula formulatype="inline"><tex Notation="TeX">${\\rm H}_{2}$</tex></formula> gas molecules on the uncovered surface of <formula formulatype="inline"><tex Notation="TeX">${\\rm SnO}_{2}$</tex></formula> thin film.
Manish Kumar Verma and Vinay Gupta
Elsevier BV
Manish K. Verma and Vinay Gupta
American Scientific Publishers
Manish Verma, Arijit Chowdhuri, K Sreenivas, and Vinay Gupta
Elsevier BV
Manish Verma, K Sreenivas, Vinay Gupta, and Arijit Chowdhuri
IEEE
Two sensor structures (SnO<inf>2</inf> film, and SnO<inf>2</inf> film-CuO nanolayer) have been prepared in the present study using both rf sputtering and pulsed laser deposition (PLD) techniques for trace level detection of H<inf>2</inf>S gas (20 ppm). The response characteristic of sensor structures based on bare SnO<inf>2</inf> thin film (90 nm) and after integrating with catalytic CuO nanolayer (10 nm) have been investigated and a comparative study has been carried out in detail. The bilayer sensor structures (SnO<inf>2</inf> film-CuO nanolayer) prepared by both techniques exhibits enhanced sensitivity in comparison to bare SnO<inf>2</inf> film sensor. PLD grown SnO<inf>2</inf>-CuO bilayer structure shows maximum sensor response (∼2.3×10<sup>3</sup>) at a very low operating temperature of 100°C.