A Simple Fabrication Method for Three-Dimensional Gold Nanoparticle Electrodes and Their Application to the Study of the Direct Electrochemistry of Cytochrome c
A Simple Fabrication Method for Three-Dimensional Gold Nanoparticle Electrodes and Their Application to the Study of the Direct Electrochemistry of Cytochrome c
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DOI：
10.1002/elan.200900323
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发表时间：
2010-01-01
期刊：
影响因子：
3
通讯作者：
Ohno, Hiroyuki
中科院分区：
文献类型：
--
作者：
Murata, Kenichi;Kajiya, Kazuki;Ohno, Hiroyuki
A simple method for constructing gold nanoparticle-modified electrodes with three-dimensional nanostructures is demonstrated. The electrodes were prepared by casting citrate-reduced AuNPs onto polycrystalline gold electrodes. The resultant electrodes had a large surface area-to-volume ratio, adequate for high protein loading and conferring high stability. The gold nanoparticle electrodes were covered with a self-assembled monolayer of 11-mercaptoundecanoic acid for electrostatic immobilization of cytochrome c (cyt c). At the electrode, direct, reversible electron transfer from cyt c was observed with remarkable stability. Moreover, an extremely high surface coverage of electrochemically active cyt c, 167 fully packed monolayers, was obtained through use of the electrode.
