High-selectivity electrochemical non-enzymatic sensors based on graphene/Pd nanocomposites functionalized with designated ionic liquids

Chueh Han Wang, Cheng Hsien Yang, Jeng-Kuei Chang*

*此作品的通信作者

研究成果: Article同行評審

34 引文 斯高帕斯(Scopus)

摘要

Nano-sized Pd particles are uniformly dispersed on graphene nanosheets (GNSs) using a supercritical-fluid-assisted deposition technique to increase the electrochemical sensing properties. The incorporation of different kinds of ionic liquid (IL) can increase the electrode sensing current toward different analytes. Butylmethylpyrrolidinium–bis(trifluoromethanesulfonyl)imide (BMP–TFSI) IL is beneficial for glucose detection, whereas the electrode with butylmethylpyrrolidinium–dicyanamide (BMP–DCA) IL shows high sensitivity toward ascorbic acid (AA). The selective detection of glucose or AA from their mixture is for the first time demonstrated using a non-enzymatic electrode with the aid of an IL. Angle-resolved X-ray photoelectron spectroscopy analyses indicate that GNSs can create an aligned cation/anion orientation in the adsorbed IL film, with the anions preferentially occupying the topmost surface. As a result, the electrode sensitivity and selectivity are mainly determined by the IL constituent anions.

原文English
頁(從 - 到)483-488
頁數6
期刊Biosensors and Bioelectronics
89
DOIs
出版狀態Published - 15 3月 2017

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