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Yoo, Chun Sang
Combustion & Propulsion Lab
Research Interests
  • Numerical turbulent combustion

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Diffusional Electrochemistry of Cytochrome c on Mixed Captopril/3-Mercapto-1-propanol Self-Assembled Monolayer Modified Gold Electrodes

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Title
Diffusional Electrochemistry of Cytochrome c on Mixed Captopril/3-Mercapto-1-propanol Self-Assembled Monolayer Modified Gold Electrodes
Author
Mozaffari, Seyed AhmadChang, TaihyunPark, Su-Moon
Keywords
1-propanol; Aqueous solutions; Cytochrome c; Differential pulse voltammetric peaks; Diffusion Coefficients; Diffusion controlled; Electrochemical impedance; Electron transfer coefficient; Exchange rates; Formal potential; Gold electrodes; Impedance data; Mixed SAM; Number of electrons; Thermo dynamic analysis
Issue Date
200907
Publisher
AMER CHEMICAL SOC
Citation
JOURNAL OF PHYSICAL CHEMISTRY C, v.113, no.28, pp.12434 - 12442
Abstract
Well-defined, quasi-reversible, and diffusion controlled electrochemistry of cytochrome c (cyt c) has been observed at a gold electrode modified with a novel mixed captoptil/3-mercapto-1-propanol self-assembled monolayer (SAM) in ail aqueous solution. An exchange rate constant of 1.4 x 10(-3) cm/s, ail electron transfer coefficient of 0.52, a diffusion coefficient of 7.8 x 10(-7) cm(2)/s, an apparent number of electrons transferred of 0.98, and formal potential of 0.076 V vs AglAgCl (in saturated KCl) were obtained for the reaction from complete kinetic and thermodynamic analyses of the impedance data obtained using Fourier transform electrochemical impedance spectroscopic experiments. The differential Pulse voltammetric peak currents show ail excellent linearity with the cyt c concentration in a range of 5.0 x 10(-6) to 5.0 x 10(-4) M at the mixed SAM modified gold electrode.
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DOI
http://dx.doi.org/10.1021/jp9027645
ISSN
1932-7447
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