Solid-Contact Ion-Selective Electrodes (ISEs) based on Ligand Functionalised Gold Nanoparticles

被引：18

作者：

Matzeu, Giusy ^{[1
]}

Zuliani, Claudio ^{[2
]}

Diamond, Dermot ^{[1
]}

机构：

[1] Dublin City Univ, Sch Chem Sci, Natl Ctr Sensor Res, Insight Ctr Data Analyt, Dublin 9, Ireland

[2] Univ London Imperial Coll Sci Technol & Med, Dept Elect & Elect Engn, London SW7 2AZ, England

来源：

ELECTROCHIMICA ACTA | 2015年 / 159卷

基金：

爱尔兰科学基金会;

关键词：

solid-contact; lipoic amide; lipoic acid; gold nanoparticles; lead and sodium ion-selective electrodes; POLY(VINYL CHLORIDE) MEMBRANE; ELECTROCHEMICAL SENSOR; POLYMER MEMBRANE; DETECTION LIMIT; OPPORTUNITIES; TRANSDUCER; STABILITY; LAYER;

D O I：

10.1016/j.electacta.2015.01.143

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Gold nanoparticles (Au-NPs) functionalised with lipoic acid (LAc) or lipoic amide (LAm) have been investigated as solid-contact in disposable lead and sodium selective electrodes. In Pb2+ and Na+ solutions, electrodes incorporating LAm Au-NPs displayed super-Nernstian and Nernstian behaviour whereas electrodes incorporating LAc Au-NPs showed Nernstian and sub-Nernstian responses. During calibration, the response of solid-contact ion-selective electrodes (SC-ISEs) was found to depend on the particular ion-analyte/Au-NP ligand pair, suggesting that the ligand decorating the NPs has an important role in regulating the overall electrode response function. Insights into the underlying trans-membrane and the Au-NPs/membrane interface processes have been obtained by means of electrochemical impedance spectroscopy. (C) 2015 Elsevier Ltd. All rights reserved.

引用

页码：158 / 165

页数：8

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