Electrocatalytic Response of Dopamine at a Metallothioneins Self-Assembled Gold Electrode.
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- WANG Qian
- Department of Chemistry, Peking University
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- LI Nanqiang
- Department of Chemistry, Peking University
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- WANG Wenqing
- Department of Chemistry, Peking University
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The metallothioneins (MT) self-assembled monolayer modified gold electrode (MT/Au) is demonstrated to catalyze the electrochemical response of dopamine (DA) by cyclic voltammetry. A pair of well-defined redox waves was obtained and the calculated standard rate constant (ks) is 6.97 × 10-3 cm s-1 (20°C) at the self-assembled electrode. The electrode reaction is a quasi-reversible process. The oxidation peak of DA can be used to determine the concentration of DA. The peak current and the concentration of DA follow a linear relationship in the range of 2.0 × 10-5 M to 8.0 × 10-4 M. The detection limit is 6.0 × 10-6 M. By ac impedance spectroscopy, the apparent electron transfer rate constant (kapp) of Fe(CN)63-/Fe(CN)64- at the MT/Au electrode was obtained as 2.0 × 10-5 cm s-1. The MT/Au was characterized with grazing angle FT-IR spectroscopy and contact angle goniometry.
収録刊行物
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- Analytical Sciences
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Analytical Sciences 18 (6), 635-639, 2002
社団法人 日本分析化学会
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詳細情報 詳細情報について
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- CRID
- 1390001204256854400
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- NII論文ID
- 130004440622
- 10011312443
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- NII書誌ID
- AA10500785
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- COI
- 1:CAS:528:DC%2BD38Xks12htbc%3D
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- ISSN
- 13482246
- 09106340
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- NDL書誌ID
- 6185093
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- PubMed
- 12083546
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- NDL
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- PubMed
- CiNii Articles
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- 使用不可