Nanostructured gold colloid electrode based on in situ functionalized self-assembled monolayers on gold electrode

作者：Wang Liang^*; Bai Junyue; Huang Pengfei; Wang Honjing; Zhang Liying; Zhao Yuqing

来源：Electrochemistry Communications, 2006, 8(12): 1825-1829.

DOI：10.1016/j.elecom.2006.08.013

• 4-aminothiophenol
• in situ functionalization
• 1,4-benzenedimethanethiol
• gold nanoparticle
• mixed monolayers

A novel method for fabricating nanostructured gold colloid electrode based on in situ functionalization of self-assembled monolayers (SAMs) of 4-aminothiophenol (4-ATP) on gold electrode is proposed. The in situ functionalization of 4-ATP SAMs yields a redox active monolayer of 4'-mercapto-N-phenylquinone diimine (NPQD). When the amino-rich surface is exposed to gold colloid, the citrate-stabilized gold nanoparticles (GNPs) can be anchored onto the surface of the in situ functionalized electrode by the electrostatic interactions and a new nanostructured gold colloid surface was obtained. The mixed monolayers of in situ functionalized product, NPQD, and 1,4-benzenedimethanethiol (BDMT) can provide a more compact and order platform to fabricate GNPs on the electrode surface. The film formed by this technique has the advantages of high organization and uniformity, which could provide a desirable microenvironment to assemble GNPs and facilitate the concentration of the analyte from the bulk solution to the electrode surface. The nanostructured gold colloid electrode has favorable effect on the electrochemical oxidation of naphthol isomers.

• 出版日期2006-12
• 单位大连民族大学; 大连理工大学