CUED Publications database

Graphene SOI CMOS sensors for detection of PPB levels of NO<inf>2</inf> in air

Gardner, JW and Cole, MT and De Luca, A and Clement, P and Llobet, E and Ali, SZ and Udrea, F (2013) Graphene SOI CMOS sensors for detection of PPB levels of NO<inf>2</inf> in air. In: UNSPECIFIED pp. 2055-2058..

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There is considerable demand for sensors that are capable of detecting ultra-low concentrations (sub-PPM) of toxic gases in air. Of particular interest are NO 2 and CO that are exhaust products of internal combustion engines. Electrochemical (EC) sensors are widely used to detect these gases and offer the advantages of low power, good selectivity and temporal stability. However, EC sensors are large (1 cm 3 ), hand-made and thus expensive ($25). Consequently, they are unsuitable for the low-cost automotive market that demands units for less than $10. One alternative technology is SnO 2 or WO 3 resistive gas sensors that are fabricated in volume today using screen-printed films on alumina substrates and operate at 400°C. Unfortunately, they suffer from several disadvantages: power consumption is high 200 mW; reproducibility of the sensing element is poor; and cross-sensitivity is high. © 2013 IEEE.

Item Type: Conference or Workshop Item (UNSPECIFIED)
Divisions: Div B > Solid State Electronics and Nanoscale Science
Div B > Electronics, Power & Energy Conversion
Depositing User: Cron Job
Date Deposited: 17 Jul 2017 19:10
Last Modified: 22 May 2018 07:44