Conducting Polymer Based Gas Sensor Using PNIN- Gate All Around - Tunnel FET
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ORIGINAL PAPER
Conducting Polymer Based Gas Sensor Using PNIN- Gate All Around Tunnel FET Jaya Madan 1
&
Rahul Pandey 1
&
Rishu Chaujar 2
Received: 14 October 2019 / Accepted: 10 January 2020 # Springer Nature B.V. 2020
Abstract In the present work, the n + source pocket PIN gate all around tunnel FET (PNIN-GAA-TFET) based gas sensor has been proposed. Various analyte gases such as hexane, methanol, isopropanol, dichloromethane, and chloroform have been examined for their sensitivity and stability. The sensing of various analyte gases relies on the fact of work function modulation of the conducting polymer (used as gate) on the exposure of the gas vapors. Subsequently, the work function modulation of the conducting polymer gate alters the characteristics of the device that is calibrated for examining the sensitivity of the proposed gas sensor. The shift in the subthreshold current after the exposure of the analyte gas has been used as a sensing metric. Moreover, the influence of ambient temperature, conduction path, i.e., the channel radius and the oxide thickness of gate on the sensitivity and the characteristics of the proposed gas sensors have also been examined. The employment of the proposed PNIN-GAATFET based gas sensor may fulfill the perpetual demands of chemical and pharmaceutical industries, biomedical diagnostics, environmental monitoring and automotive industries by offering a low power, highly sensitive and reliable analyte gas detection. Keywords Conducting polymer . Gas sensor . Sensitivity . Work function modulation . n + source pocket . Tunnel FET
1 Introduction Employment of gas sensors in various disease diagnostics, environmental monitoring and automotive industries, to meet the demands of widespread detection and continuous monitoring, necessitate cheap, highly sensitive, stable and fast gas sensors [1, 2]. Direct transduction, CMOS compatibility, low cost, high sensitivity, low power and small size offered by the FET based gas sensor have opened up avenues in various scientific fields [3–5]. Various toxic indoor and industrial air pollutants have significant negative effects on human health, while they are also used in numerous applications [6]. Such as methanol, an organic solvent, has a wide range of applications; * Rahul Pandey [email protected] * Rishu Chaujar [email protected] 1
VLSI Centre of Excellence, Chitkara University Institute of Engineering and Technology, Chitkara University, Rajpura, Punjab, India
2
Microelectronics Research Lab, Department of Applied Physics, Delhi Technological University, Bawana Road, Delhi 110042, India
for the manufacturing of various colors, dyes, perfumes and drugs. However, methanol is highly toxic and fatal to human beings even at modest concentrations (
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