Gas sensing based on the dynamic nonlinear responses of a semiconductor gas sensor: dependence on the range and frequency of a cyclic temperature change
Gas sensing based on the dynamic nonlinear responses of a semiconductor gas sensor: dependence on the range and frequency of a cyclic temperature change
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DOI：
10.1016/s0003-2670(98)00013-0
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发表时间：
1998-03-31
影响因子：
6.2
通讯作者：
Ojima, N
中科院分区：
文献类型：
--
作者：
Nakata, S;Ozaki, E;Ojima, N
提出了一种基于动态非线性响应中多维信息的新型气敏系统。将正弦温度变化施加到半导体气体传感器上，并通过快速傅里叶变换（FFT）分析传感器的电导。FFT的高次谐波表征了传感器表面响应的非线性特性。高次谐波的振幅表现出特征的变化，这取决于传感器表面上的气体物种的动力学，以及温度的循环变化的范围和频率。气体传感器的特性的非线性响应，这取决于温度的周期性变化的范围进行了讨论，在传感器表面的气体分子的动力学。(C)1998年Elsevier Science B.V.
A novel gas-sensing system based on the multi-dimensional information contained in dynamic nonlinear responses is reported. A sinusoidal temperature change was applied to a semiconductor gas sensor, and the resulting conductance of the sensor was analyzed by fast Fourier transformation (FFT). The higher harmonics of the FFT characterized the nonlinear properties of the response at the sensor surface. The amplitudes of the higher harmonics exhibited characteristic changes which depended on the kinetics of the gas species on the sensor surface, and on the range and frequency of the cyclic change in temperature. The characteristic nonlinear response of a gas sensor which depends on the range of a cyclic change in temperature is discussed in relation to the kinetics of gas molecules at the sensor surface. (C) 1998 Elsevier Science B.V.