کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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182646 | 459435 | 2007 | 6 صفحه PDF | دانلود رایگان |
3-Mercaptopropionic acid (MPA) was assembled on gold nanoparticle arrays to form three-dimensional monolayer. The electrochemical behavior of small biomolecules such as NADH, ascorbic acid (AA), uric acid (UA) and dopamine (DA) on the as-prepared three-dimensional monolayer was studied. The cyclic voltammetric results indicated that three-dimensional MPA monolayer promoted the electron transfer between NADH and electrode, which was similar to two-dimensional MPA monolayer assembled on planar gold electrode. However, to the electrooxidation of AA, although two-dimensional MPA monolayer exhibited a blocking effect, three-dimensional MPA monolayer showed an obvious promotion. The catalytic activity of three-dimensional MPA monolayer towards UA and DA was also observed, which was attributed to its three-dimensional structure that might effectively prevent the poison of the electrode surface by the oxidation products.
Journal: Electrochemistry Communications - Volume 9, Issue 3, March 2007, Pages 459–464