Non-linear dynamic responses of a semiconductor gas sensor: Evaluation of kinetic parameters and competition effect on the sensor response

被引：29

作者：

Nakata, S ^{[1
]}

Takemura, K ^{[1
]}

Neya, K ^{[1
]}

机构：

[1] Nara Univ Educ, Dept Chem, Nara 6308528, Japan

来源：

SENSORS AND ACTUATORS B-CHEMICAL | 2001年 / 76卷 / 1-3期

关键词：

semiconductor; gas sensor; non-linear; tin dioxide; competition;

D O I：

10.1016/S0925-4005(01)00652-9

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

A novel gas-sensing system based on a dynamic non-linear response is reported. A sinusoidal temperature change is applied to a semiconductor gas sensor, and the resulting conductance of the sensor is analyzed. The sensor response changes characteristically depending on the composition of the gas species and is analyzed by fast Fourier transformation (FFT). Not only the individual concentrations of samples but also the competition effect on the sensor responses to gaseous mixtures are evaluated by the higher harmonics of FFT. The physicochemical parameters on the sensor response are estimated based on information fi om the non-linear response under the application of temperature modulation. The competition effect on the response to two samples is discussed in relation to the kinetics of gas molecules on the semiconductor surface. (C) 2001 Elsevier Science B.V. All rights reserved.

引用

页码：436 / 441

页数：6

共 25 条

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CLIFFORD PK, 1982, SENSOR ACTUATOR, V3, P255

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