کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
701368 | 1460820 | 2006 | 5 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: A novel “coral” carbon microprobe with and without N2 incorporation A novel “coral” carbon microprobe with and without N2 incorporation](/preview/png/701368.png)
“Coral”-type microstructure carbon films, with and without N2 incorporation, were grown on sharpened tungsten microprobes by plasma enhanced chemical vapor deposition (PECVD) using H2/CH4/N2 and H2/CH4 gas mixtures, respectively. The electrochemical behaviors of the coral-type carbon coated tungsten microprobe, characterized by various concentrations of ferrocyanide in a background of 0.1 M KCl, show excellent structural stability with similar microstructure before and after prolonged analysis without the need of surface pretreatment. The microprobes exhibit quasi-reversible kinetics with high signal-to-noise S/B ratio. The N2 incorporated microprobe shows a slightly wider potential window, no surface adsorption of the analyte and higher sensitivity as compared to the sample without nitrogen incorporation. Furthermore, the wide potential window of ∼ 3 V is very good as compared to boron-doped diamond electrodes which are ∼ 3.5 V. This well behaved; broad electrochemical behavior and the simple fabrication method make the “coral” carbon film microprobe an excellent candidate for electrochemical sensing.
Journal: Diamond and Related Materials - Volume 15, Issues 11–12, November–December 2006, Pages 1844–1848