Comparative NO2 gas-sensing performance of the self-heated individual, multiple and networked SnO2 nanowire sensors fabricated by a simple process

被引:48
作者
Nguyen Duc Chinh [1 ]
Nguyen Van Toan [1 ]
Vu Van Quang [1 ]
Nguyen Van Duy [1 ]
Nguyen Duc Hoa [1 ]
Nguyen Van Hieu [1 ]
机构
[1] HUST, ITIMS, Hanoi, Vietnam
关键词
Self heated device; Nanowires; Gas sensor; Tin oxide;
D O I
10.1016/j.snb.2014.04.095
中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
Gas nanosensors with good "3S" (sensitivity, selectivity and stability), ultralow power consumption and low cost are increasingly needed for portable electronic devices. Herein, we demonstrate the facile fabrication process of individual, multiple, and networked SnO2 nanowire (NW) sensors, which can be used to detect highly toxic NO2 gas based on the Joule self-heating effect, consuming only few tens of p,W of power. Systematic investigation on the gas-sensing properties reveals that the individual NW sensor shows advantages, such as better gas response shorter response-recovery time and lower power consumption over multiple and networked NW sensors. The self-heated individual NW sensor with applying a bias voltage of 25 V exhibits a good response to NO2 gas concentrations as low as 1 ppm with short response (similar to 8 s) and recovery times (similar to 25 s) and consumes only 35 mu W of power. In addition, the gas-response of individual NW sensors operated by either self- or external heating was compared to demonstrate the advantages of the development of the sensor concept for practical applications. (C) 2014 Elsevier B.V. All rights reserved.
引用
收藏
页码:7 / 12
页数:6
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