Highly Selective Environmental Nanosensors Based on Anomalous Response of Carbon Nanotube Conductance to Mercury Ions

被引：67

作者：

Kim, Tae Hyun ^{[1
]}

Lee, Joohyung ^{[1
]}

Hong, Seunghun ^{[1
]}

机构：

[1] Seoul Natl Univ, Dept Phys & Astron, Seoul 151747, South Korea

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2009年 / 113卷 / 45期

关键词：

METAL-IONS; DEVICES;

D O I：

10.1021/jp908902k

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

We have developed a selective, sensitive, and fast single-walled carbon nanotube (swCNT) field effect transistor (FET) sensor for Hg2+ ion detection. This sensor is based on the anomalous response of swCNT conductance to the exposure of Hg2+, which provides the selectivity toward Hg2+ over various other metal ions through a strong redox reaction between swCNTs and Hg2+. our sensor system exhibited a detection limit of 10 nM for Hg2+ in water, which is comparable with the maximum allowable limit of mercury ions in drinking water set by most government environmental protection agencies. It also has a wide measurable detection range from 10 nM to 1 mM and a sensitive quantifying range with a steep slope for Hg2+ detection.

引用

页码：19393 / 19396

页数：4

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