Self-Assembling of Gold Nanoparticles Array for Electro-Sensing Applications

被引:0
作者
Al-Akraa, Islam M. [1 ]
Mohammad, Ahmad M. [1 ,2 ]
El-Deab, Mohamed S. [2 ,3 ]
El-Anadouli, Bahgat E. [2 ]
机构
[1] British Univ Egypt, Dept Chem Engn, Fac Engn, Cairo 11837, Egypt
[2] Cairo Univ, Dept Chem, Fac Sci, Cairo 12613, Egypt
[3] Tokyo Inst Technol, Dept Elect Chem, Interdisciplinary Grad Sch Sci & Engn, Midori Ku, Yokohama, Kanagawa 2268502, Japan
来源
INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE | 2013年 / 8卷 / 01期
关键词
Gold nanoparticles; Optical properties; Self-assembly; Benzenedimethanethiol; Ascorbic acid; PARTICLE-SIZE; FORMIC-ACID; MONOLAYERS; SOL; NANOCLUSTERS; NANOCRYSTALS; CHEMISTRY; CATALYSIS; SILVER; METAL;
D O I
暂无
中图分类号
O646 [电化学、电解、磁化学];
学科分类号
081704 ;
摘要
A colloidal solution of citrate-stabilized gold nanoparticles (AuNPs) with an average size of ca. 2.6 nm has been prepared, characterized and further implemented in electro-sensing applications. This colloidal solution of AuNPs has been prepared via the reduction of NaAuCl4 with sodium tetrahydroborate (NaBH4) using trisodium citrate as a stabilizer. The optical properties of this solution have been studied with UV-Vis spectroscopy. Next, these AuNPs have been immobilized onto a polycrystalline Au (poly-Au) electrode with the assistance of benzenedimethanethiol (BDMT), which served as a binder. Attention has been taken to ensure the formation of a compact impermeable layer of BDMT on poly-Au electrode, in order isolate the ploy-Au surface from participating in the upcoming applications. Interestingly, the AuNPs-modified Au electrode has shown a better sensing capability for ascorbic acid than that of the bare poly-Au, which opens opportunities for future designing of nanoparticles-based biological sensors.
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页码:458 / 466
页数:9
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