ELECTROCONDUCTING CONJUGATED POLYMERS - NEW SENSITIVE MATRICES TO BUILD UP CHEMICAL OR ELECTROCHEMICAL SENSORS - A REVIEW
ELECTROCONDUCTING CONJUGATED POLYMERS - NEW SENSITIVE MATRICES TO BUILD UP CHEMICAL OR ELECTROCHEMICAL SENSORS - A REVIEW
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DOI：
10.1016/0925-4005(92)80029-w
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发表时间：
1992-01-01
影响因子：
8.4
通讯作者：
BIDAN, G
中科院分区：
文献类型：
--
作者：
BIDAN, G
导电共轭聚合物（ECPs）在传感器中作为敏感元件或作为易于固定特定基底的基质，显得非常有吸引力。这是由于它们的固有性质：一步电合成的形式是附着膜沉积在电极表面，阴离子物质被掺杂。这种掺杂反应使得通过氧化还原相互作用在几个数量级上可逆地调节电导率成为可能。基于ecp的气体传感器对影响掺杂水平的气体（NO2， NH3等）敏感，从而实现直接的电导监测。基于ECP的离子传感器通过电流检测非电活性离子，因为掺杂ECP会产生电流。离子筛分效应允许对截止尺寸有一定的选择性。SGFET微电化学“晶体管”器件对ph值敏感。在ECP薄膜中固定良好的酶“电线”解释了对基于ECP的生物传感器研究日益增长的兴趣。一种有趣的方法是同时包含酶（葡萄糖氧化酶）与阴离子电子继电器。有报道称其寿命为60天。ECP的多用途特性有望改善特异性、酶连接和寿命。
Electroconducting conjugated polymers, ECPs, appear very attractive for use in sensors either as sensitive components or as a matrix for easy immobilization of specific substrates. This is due to their intrinsic properties: a one-step electrosynthesis in the form of an adherent film deposited at the surface of the electrode with anionic species being included by doping. This doping reaction makes it possible to modulate the conductivity reversibly over several orders of magnitude via redox interactions. ECP-based gas sensors are sensitive to gases (NO2, NH3, etc.) affecting the doping level, which results in a straightforward conductance monitoring. ECP-based ionic sensors amperometrically detect electroinactive ions, since the doping of the ECP results in a current flow. The ion-sieving effect allows some selectivity by cut-off size. SGFET microelectrochemical 'transistor' devices are sensitive to pH. Immobilization with a good 'electrical wiring' of enzymes in ECP films explains the increasing interest in research on ECP-based biosensors. An interesting approach is the simultaneous inclusion of the enzyme (glucose oxidase) with an anionic electron relay. A lifetime of 60 days has been reported. The versatile properties of ECP promise improvements in specificity, enzyme wiring and lifetime.