A Platinum Nanowire Sensor for Ethylene in Air
A Platinum Nanowire Sensor for Ethylene in Air
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DOI：
10.1021/acssensors.3c00885
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发表时间：
2023-07-07
期刊：
影响因子：
8.9
通讯作者：
Penner，Reginald M. M.
中科院分区：
文献类型：
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作者：
Humphrey，Nicholas J. J.;Choi，Eric J. J.;Penner，Reginald M. M.
报道了一种单根铂纳米线(PtNW)乙烯气体化学电阻传感器。在这一应用中，PtNW执行三种功能：(1)焦耳自加热到指定温度，(2)基于现场电阻的温度测量，以及(3)检测空气中的乙烯作为电阻变化。在630到660K的最佳北向温度范围内，检测到空气中的乙烯气体在1到30ppm的浓度范围内使纳米线电阻降低4.5%。这种响应是快速的(30-100 S)，可逆，并且对于重复的乙烯脉冲是可重复的。当NW厚度从60 nm减小到20 nm时，观察到信号幅度增加了三倍，这与涉及表面电子散射的信号转导机制相称。
A single platinum nanowire (PtNW) chemiresistive sensor for ethylene gas is reported. In this application, the PtNW performs three functions: (1) Joule self-heating to a specified temperature, (2)in situresistance-based temperature measurement, and (3) detection of ethylene in air as a resistance change. Ethylene gas in air is detected as a reduction in nanowire resistance by up to 4.5% for concentrations ranging from 1 to 30 ppm in an optimum NW temperature range from 630 to 660 K. This response is rapid (30–100 s), reversible, and reproducible for repetitive ethylene pulses. A threefold increase in signal amplitude is observed as the NW thickness is reduced from 60 to 20 nm, commensurate with a signal transduction mechanism involving surface electron scattering.