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Detection of a CO and NH3 Gas Mixture Using Carboxylic Acid-Functionalized Single-Walled Carbon Nanotubes

Detection of a CO and NH3 Gas Mixture Using Carboxylic Acid-Functionalized Single-Walled Carbon Nanotubes

Ki-Young Dong, Jinnil Choi, Yang Doo Lee, Byung Hyun Kang, Youn-Yeol Yu, Hyang Hee Choi, Byeong-Kwon Ju

Nanoscale Res Lett. 2013 Jan 4;8(1):12.

PMID: 23286690

Abstract:

Carbon nanotubes (CNT) are extremely sensitive to environmental gases. However, detection of mixture gas is still a challenge. Here, we report that 10 ppm of carbon monoxide (CO) and ammonia (NH3) can be electrically detected using a carboxylic acid-functionalized single-walled carbon nanotubes (C-SWCNT). CO and NH3 gases were mixed carefully with the same concentrations of 10 ppm. Our sensor showed faster response to the CO gas than the NH3 gas. The sensing properties and effect of carboxylic acid group were demonstrated, and C-SWCNT sensors with good repeatability and fast responses over a range of concentrations may be used as a simple and effective detection method of CO and NH3 mixture gas.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
LS71707	Carbon nanotube, single-walled, carboxylic acid functionalized			Price

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