A biochemical sensing system using an 11-MUA/calix[6]arene bilayer to sense amine vapors

作者：Yao Da Jeng^*; Yang Yong Ruei; Tai Chu Chun; Hsiao Wen Hsiu; Ling Yong Chien

来源：Journal of Micromechanics and Microengineering, 2007, 17(8): 1435-1441.

DOI：10.1088/0960-1317/17/8/004

To fabricate a novel surface-acoustic-wave sensor, the core of an electronic nose (E-nose), 128 degrees YX LiNbO3 with a large value of K-2 was chosen as a sensing substrate. An interdigital transducer (IDT) was made with a Cr/Au film as a metallic structure on top of the substrate. The center frequency of the sensing chip was designed to be 100 MHz. A self-assembled bilayer, p-tert-butylcalix[6] arene, was synthesized on the Au surface between the centers of the IDT. Amine vapor was adopted as a sample to test the developed system. The detection limit for 1-aminopropane was about 60 ppm, the sensitivity was 0.96 Hz (ppmv)(-1), the ratio of signal to noise at the detection limit was about 32 and the stability was about 0.05 ppm. A satisfactory linear response was proved in sensing gases of amine type.

• 出版日期2007-8
• 单位清华大学