INVESTIGATION OF SENSOR PROPERTIES OF COPPER PHTHALOCYANINE WITH THE USE OF SURFACE ACOUSTIC-WAVES

被引:17
作者
URBANCZYK, M
JAKUBIK, W
KOCHOWSKI, S
机构
[1] Institute of Physics, Silesian Technical University
关键词
COPPER PHTHALOCYANINE; ORGANIC VAPOR SENSOR; SURFACE ACOUSTIC WAVES;
D O I
10.1016/0925-4005(94)87012-8
中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
This paper deals with an investigation into the interaction of a thin copper phthalocyanine (CuPc) layer about 1.3 mum thick with organic compound vapours, such as acetone, benzene, chloroform, trichloroethylene and diethyl ether. For this purpose a surface acoustic wave (SAW) device has been utilized in a dual delay-line oscillator system. The changes of physical properties of the CuPc layer are recorded as a change in differential frequency DELTAf, i.e., in the difference between the two oscillator frequencies. The acoustic waveguides are fabricated on the y-cut of the LiNbO3 piezoelectric substrate. The operating frequency of the implemented transducers is about 38 MHz. For the investigated CuPc layer various sensitivities and various response and regeneration speeds have been observed, according to the concentration of the organic compound vapour used. The greatest sensitivity (almost-equal-to 0.1 Hz ppm-1) is obtained for trichloroethylene.
引用
收藏
页码:133 / 137
页数:5
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