DNA decorated carbon nanotube sensors on CMOS circuitry for environmental monitoring

Yu Liu; Chia-Ling Chen; V. Agarwal; Xinghui Li; S. Sonkusale; Mehmet R. Dokmeci; Ming L. Wang

doi:10.1117/12.848859

31 March 2010 DNA decorated carbon nanotube sensors on CMOS circuitry for environmental monitoring

Yu Liu, Chia-Ling Chen, V. Agarwal, Xinghui Li, S. Sonkusale, Mehmet R. Dokmeci, Ming L. Wang

Proceedings Volume 7647, Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2010; 76471W (2010) https://doi.org/10.1117/12.848859
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2010, San Diego, California, United States

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.

Citation Download Citation

Yu Liu, Chia-Ling Chen, V. Agarwal, Xinghui Li, S. Sonkusale, Mehmet R. Dokmeci, and Ming L. Wang "DNA decorated carbon nanotube sensors on CMOS circuitry for environmental monitoring", Proc. SPIE 7647, Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2010, 76471W (31 March 2010); https://doi.org/10.1117/12.848859

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