摘要
本文叙述了用银-氯化银作参比电极的复合离子敏感场效应晶体管的制备、原理和测量结果。通过实验和理论分析,提出了用无液接的银-氯化银电极作参比电极的可行性和克服其不稳定性的途径;并对用银-氯化银参比电极测量Na^+,Ca^(++)等阳离子时,敏感场效应晶体管不符合能斯特响应的现象进行了解释。
The preparation, principle and measured results of complex ion sensitive field effect transistor (ISFET) with Ag-AgCl reference electrode are described. Through theoretical analysis and experiments, the feasibility of Ag-AgCl reference electrode which does not contact with solution and the way of overcoming its unstability are put forward. It is explained that why the effect appearing in the ISFET does not conform to Nernst effect, when Na+, Ca++ cations etc. are measured with Ag-AgCl reference electrode.
关键词
参比电极
银-氯化银
晶体管
ISFET
Ion sensitive field effect transistor
Sensitivity
Reference electrode
Nernst effect
