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In this paper, the poly-2,5-dimethoxyethynylbenzene (PDMEB) and poly-2,5-dimethoxyethynylbenzene/In2O3 were in-situ synthesized as gas sensing materials. The PDMEB/In2O3 nanocomposite was accessed by two procedures both relying on Pd catalysis: (1) The reaction of ethynyltri-n-buyltin replacing Br belonged to 1,4-dibromo-2,5-dimethoxy benzene, and (2) The step-growth polymerization of PDMEB through...
An extended gate ion sensitive field effect transistor with signal interface was presented for continuous monitoring of H+-ion concentrations. The SnO2/ITO glass, fabricated by sputtering SnO2 on the conductive ITO glass, was used as a pHsensitive membrane of extended gate field effect transistor (EGFET). The signal processing circuits, constructed by using differential sensing and noise shaping techniques,...
In this study, an extended base bipolar junction transistor (EBBJT) as an H+ ion sensitive device have been investigated. The SnO2/ITO glass, fabricated by sputtering SnO2 on the conductive ITO glass, is used as a pH-sensitive membrane for electrode, which is connected with a commercial bipolar junction transistor (BJT) device. The experimental data show that this structure has a linear pH response,...
Inorganic nanoparticles SnO2 and In2O3 were dispersed using an in situ synthesis technique in one of the polyynes polymer, namely poly-2, 5-dimethoxyethynylbenzene(PDMEB) to prepare organic-inorganic nanocomposites PDMEB/SnO2 and PDMEB/In2O3. The nanocomposites were characterized by FT-IR, which highlighted the chain organization and the plasticizing effect of the nanoparticles on the polymers. Laser...
The objective of this paper is to realize a UV sensor with an Al/TiO2/ITO structure and the high quality TiO2 thin films were grown on ITO substrates prepared by sputtering and the sol-gel method at 300degC. The proposed UV device adopted metal semiconductor metal (MSM) light-dependent resistor has characteristics of varying film thickness, and high photo-electric and stability. The photo-electric...
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