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
收藏
页码：158 / 165
页数：8
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