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Proceedings Paper

DNA decorated carbon nanotube sensors on CMOS circuitry for environmental monitoring
Author(s): Yu Liu; Chia-Ling Chen; V. Agarwal; Xinghui Li; S. Sonkusale; Mehmet R. Dokmeci; Ming L. Wang
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Paper Abstract

Single-walled carbon nanotubes (SWNTs) with their large surface area, high aspect ratio are one of the novel materials which have numerous attractive features amenable for high sensitivity sensors. Several nanotube based sensors including, gas, chemical and biosensors have been demonstrated. Moreover, most of these sensors require off chip components to detect the variations in the signals making them complicated and hard to commercialize. Here we present a novel complementary metal oxide semiconductor (CMOS) integrated carbon nanotube sensors for portable high sensitivity chemical sensing applications. Multiple zincation steps have been developed to ascertain proper electrical connectivity between the carbon nanotubes and the foundry made CMOS circuitry. The SWNTs have been integrated onto (CMOS) circuitry as the feedback resistor of a Miller compensated operational amplifier utilizing low temperature Dielectrophoretic (DEP) assembly process which has been tailored to be compatible with the post-CMOS integration at the die level. Building nanotube sensors directly on commercial CMOS circuitry allows single chip solutions eliminating the need for long parasitic lines and numerous wire bonds. The carbon nanotube sensors realized on CMOS circuitry show strong response to various vapors including Dimethyl methylphosphonate and Dinitrotoluene. The remarkable set of attributes of the SWNTs realized on CMOS electronic chips provides an attractive platform for high sensitivity portable nanotube based bio and chemical sensors.

Paper Details

Date Published: 31 March 2010
PDF: 11 pages
Proc. SPIE 7647, Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2010, 76471W (31 March 2010); doi: 10.1117/12.848859
Show Author Affiliations
Yu Liu, Northeastern Univ. (United States)
Chia-Ling Chen, Northeastern Univ. (United States)
V. Agarwal, Tufts Univ. (United States)
Xinghui Li, Northeastern Univ. (United States)
S. Sonkusale, Tufts Univ. (United States)
Mehmet R. Dokmeci, Northeastern Univ. (United States)
Ming L. Wang, Northeastern Univ. (United States)

Published in SPIE Proceedings Vol. 7647:
Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2010
Masayoshi Tomizuka, Editor(s)

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