Title :
A study of adsorption kinetics of alkanethiol and alkanedithiol on gold using cyclic voltammetry
Author :
He, Hui ; Xie, Yan ; Jiang, Yaqing
Author_Institution :
Coll. of Mech. & Mater., Hohai Univ., Nanjing, China
Abstract :
A study of the adsorption kinetics of 1-octanethiol and 1,8-octanedithiol has been carried out on gold electrode by cyclic voltammetry with different concentrations. Analysis of the kinetic data show that the adsorption kinetics of 1-octanethiol and 1,8-octanedithiol can be satisfactorily described by Diffusion controlled Langmuir(DCL) model, irrespective of concentration. The rate constants of 1-octanethiol and 1,8-octanedithiol are almost invariable at different concertrations, however, the fluctuant range of 1,8-octanedithiol is larger than that of octanethiol. The rate constants of other alkanethiol(n=12,14,16,18) are measured and tunneling parameter (β) is determined from these data.
Keywords :
adsorption; diffusion; electrodes; gold; organic compounds; reaction kinetics; tunnelling; voltammetry (chemical analysis); 1,8-octanedithiol; 1-octanethiol; Au; adsorption kinetics; alkanedithiol; alkanethiol; cyclic voltammetry; diffusion controlled Langmuir model; gold electrode; tunneling parameter; Biomedical optical imaging; Electrodes; Impedance; Purification; Solids;
Conference_Titel :
Information Science and Technology (ICIST), 2011 International Conference on
Conference_Location :
Nanjing
Print_ISBN :
978-1-4244-9440-8
DOI :
10.1109/ICIST.2011.5765067
