Direct electrochemistry and electrocatalysis of cytochrome c immobilized on gold nanoparticles-chitosan-carbon nanotubes-modified electrode
文献类型:期刊论文
作者 | Xiang, Cuili1,2; Zou, Yongjin1,2; Sun, Li-Xian1; Xu, Fen1 |
刊名 | talanta |
出版日期 | 2007-11-30 |
卷号 | 74期号:2页码:206-211 |
关键词 | cytochrome c gold nanoparticles multi-walled carbon nanotubes chitosan nanohybrid direct electron transfer |
英文摘要 | a robust and effective nanohybrid film based on gold nanoparticles (gnps)/chitosan (chit)/multi-walled carbon nanotubes (mwnts) was prepared by a layer-by-layer self-assembly technique. cytochrome c (cyt c) was successfully immobilized on the nanohybrid film modified glassy carbon (gc) electrode by cyclic voltammetry. the direct electron transfer between cyt c and the modified electrode was investigated in detail. cyt c shows a couple of quasi-reversible and well-defined cyclic voltammetry peaks with a formal potential (e-0) of -0. 16 v (versus ag/agcl) in ph 7.0 phosphate buffer solution (pbs). the cyt c/gnps/chit/mwnts modified gc electrode gives an improved electrocatalytic activity towards the reduction of hydrogen peroxide (h2o2). the sensitivity is 92.21 mu a mm(-1) cm(-2) and the calculated apparent michael is-menten constant (k-m(app)) is 0.791 mm, indicating a high-catalytic activity of cyt c. the catalysis currents increase linearly to the h2o2 concentration in a wide range of 1.5 x 10(-6) to 5. 1 x 10(-4) m with a correlation coefficient 0.999. the detection limit is 9.0 x 10(-7) m (at the ratio of signal to noise, s/n = 3). moreover, the modified electrode displays rapid response (5 s) to h2o2, and possesses good stability and reproducibility. (c) 2007 elsevier b.v all fights reserved. |
WOS标题词 | science & technology ; physical sciences |
类目[WOS] | chemistry, analytical |
研究领域[WOS] | chemistry |
关键词[WOS] | hydrogen-peroxide ; hybrid composites ; biosensor ; film ; sensor ; interface ; oxidation ; proteins ; surfaces ; behavior |
收录类别 | SCI |
语种 | 英语 |
WOS记录号 | WOS:000251629800006 |
公开日期 | 2015-11-17 |
源URL | [http://159.226.238.44/handle/321008/140521] |
专题 | 大连化学物理研究所_中国科学院大连化学物理研究所 |
作者单位 | 1.Chinese Acad Sci, Dalian Inst Chem Phys, Mat & Thermochem Lab, Dalian 116023, Peoples R China 2.Chinese Acad Sci, Grad Sch, Beijing 100049, Peoples R China |
推荐引用方式 GB/T 7714 | Xiang, Cuili,Zou, Yongjin,Sun, Li-Xian,et al. Direct electrochemistry and electrocatalysis of cytochrome c immobilized on gold nanoparticles-chitosan-carbon nanotubes-modified electrode[J]. talanta,2007,74(2):206-211. |
APA | Xiang, Cuili,Zou, Yongjin,Sun, Li-Xian,&Xu, Fen.(2007).Direct electrochemistry and electrocatalysis of cytochrome c immobilized on gold nanoparticles-chitosan-carbon nanotubes-modified electrode.talanta,74(2),206-211. |
MLA | Xiang, Cuili,et al."Direct electrochemistry and electrocatalysis of cytochrome c immobilized on gold nanoparticles-chitosan-carbon nanotubes-modified electrode".talanta 74.2(2007):206-211. |
入库方式: OAI收割
来源:大连化学物理研究所
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