UREA SENSITIVE FIELD-EFFECT TRANSISTORS BASED ON DITHIO GROUP-CONTAINING LANGMUIR-BLODGETT MEMBRANES

被引:10
|
作者
LEE, S [1 ]
ANZAI, J [1 ]
OSA, T [1 ]
机构
[1] TOHOKU UNIV, INST PHARMACEUT, SENDAI, MIYAGI 980, JAPAN
关键词
D O I
10.1246/bcsj.64.2019
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
2-(Octadecyldithio)pyridine (1) and 5-(octadecyldithio)-2-nitrobenzoic acid (2) were synthesized in order to prepare Langmuir-Blodgett (LB) membranes which possess reactive dithio groups on the surface for further modification with enzymes. The monolayer membrane, composed of 1 or 2, was deposited successfully on an ion-sensitive field effect transistor, and the membrane surface was modified with urease covalently by a thiol-disulfide exchange reaction. The LB membrane-based sensor 2 showed a better potentiometric response to urea than that of the membrane-based sensor 1. The results are discussed on the basis of the reactivity of the dithio groups to urease at the membrane surface.
引用
收藏
页码:2019 / 2021
页数:3
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