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Supramolecular Assembly of β‐Cyclodextrin‐Capped Gold Nanoparticles on Ferrocene‐Functionalized ITO Surface for Enhanced Voltammetric Analysis of Ascorbic Acid
Author(s) -
Zuo Fang,
Luo Chunhua,
Zheng Zhaohui,
Ding Xiaobin,
Peng Yuxing
Publication year - 2008
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.200704113
Subject(s) - ascorbic acid , ferrocene , supramolecular chemistry , monolayer , cyclic voltammetry , electrode , chemistry , colloidal gold , electrochemistry , detection limit , cyclodextrin , supramolecular assembly , redox , combinatorial chemistry , nanoparticle , nuclear chemistry , inorganic chemistry , materials science , crystallography , nanotechnology , organic chemistry , crystal structure , chromatography , biochemistry , food science
A supramolecular recognition functionalized electrode (βCD‐nanoAu/Fc‐ITO) which exhibits redox‐activity was prepared through supramolecular assembly of β‐cyclodextrin (βCD) capped gold nanoparticles (βCD‐nanoAu) on the ITO previously coated with a monolayer of ferrocene residues (Fc‐ITO). The immobilization of βCD‐nanoAu on Fc‐ITO was confirmed by atomic force microscopy (AFM), and the supramolecular nature of the immobilization approach was also confirmed by cyclic voltammetry. On the other hand, the electrocatalytic activity of βCD‐nanoAu/Fc‐ITO electrode was also studied. The electrocatalytic activity toward ascorbic acid (AA) was enhanced compared with that at the Fc‐ITO electrode, and a linear relationship existed between the anodic peak and the concentration of AA in the range of 5.3×10 −5 to 3.0×10 −3 M with a detection limit ( S / N =3) of 4.1×10 −6 M.