Gas Detection with Vertical InAs Nanowire Arrays
Gas Detection with Vertical InAs Nanowire Arrays
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DOI：
10.1021/nl1005405
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发表时间：
2010-07-01
期刊：
影响因子：
10.8
通讯作者：
Brongersma, Sywert H.
中科院分区：
文献类型：
--
作者：
Offermans, Peter;Crego-Calama, Mercedes;Brongersma, Sywert H.
基于纳米线的器件显示出下一代（生物）化学传感器的巨大前景，如大量高质量出版物所证明的。在此，提出了一种纳米级气体传感器件，其基于无金生长的垂直InAs纳米线阵列。使用空气桥结构在纳米线的生长位置中欧姆接触纳米线，进行噪声测量以确定气体检测的测量分辨率。这些装置在室温下对远低于100 ppb的NO2浓度敏感。温度NO2暴露导致载流子密度和电子迁移率降低
Nanowire-based devices show great promise for next generation (bio)chemical sensors as evidenced by the large volume of high-quality publications Here, a nanoscale gas sensing device is presented, based on gold-free grown vertical InAs nanowire arrays The nanowires are contacted Ohmically in their as-grown locations using an air bridge construction, leaving the nanowire surface free for gas adsorption Noise measurements were performed to determine the measurement resolution for gas detection These devices are sensitive to NO2 concentrations well below 100 ppb at room temperature NO2 exposure leads to both a reduction in carrier density and electron mobility