Capacitance-voltage and impedance characteristics of field-effect EIS sensors functionalised with polyelectrolyte multilayers

被引：12
|
作者：
Poghossian, A. [1 ,2 ]
Abouzar, M. H. [1 ,2 ]
Schoening, M. J. [1 ,2 ]
机构：
[1] Aachen Univ Appl Sci, INB, D-52428 Julich, Germany
[2] Res Ctr Julich GmbH, IBN, D-52425 Julich, Germany
来源：
IRBM | 2008年 / 29卷 / 2-3期
关键词：
field-effect EIS sensor; capacitance-voltage; impedance; polyelectrolytes; layer-by-layer adsorption;
D O I：
10.1016/j.rbmret.2007.11.018
中图分类号：
R318 [生物医学工程];
学科分类号：
0831 ;
摘要：
Impedance-spectroscopy (IS) and capacitance-voltage characteristics of a field-effect-based electrolyte-insulator-semiconductor (EIS) sensor functionalised with polyelectrolyte (PE) multilayers have been investigated. The PE multilayers were obtained using the layer-by-layer technique by a consecutive adsorption of positively charged (poly(allylamine hydrochloride)) (PAH) and negatively charged (poly(sodium 4-styrene sulfonate)) (PSS) on a p-Si-SiO2 structure. Alternating shifts in the impedance and capacitance-voltage curves have been observed after the adsorption of each polyanion and polycation layer, respectively. The effects of the number of the adsorbed PE layers and polarity of the outermost layer on the impedance and capacitance-voltage curves are discussed. (C) 2007 Elsevier Masson SAS. All rights reserved.
引用
收藏
页码：149 / 154
页数：6
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