期刊
ACS APPLIED MATERIALS & INTERFACES
卷 9, 期 15, 页码 12982-12992出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.6b16860
关键词
Boron-doped carbon nanowalls; cyclic voltammetry; electrochemical impedance spectroscopy; differential pulse voltammetry; DNA purine bases
资金
- Polish National Science Center (NCN) [2012/07/D/ST5/02269, 2015/17/D/ST5/02571, 2014/14/M/ST5/00715]
- Foundation for Polish Science (FNP)
- Faculty of Electronics, Telecommunications and Informatics of the Gdansk University of Technology
In this study, we have demonstrated the fabrication of novel materials called boron-doped carbon nanowalls (B:CNWs), which are characterized by remarkable electrochemical properties such as high standard rate constant (k degrees), low peak-to-peak separation value (Delta E) for the oxidation and reduction processes of the [Fe(CN)(6)](3-/4-) redox system, and low surface resistivity. The B:CNW samples were deposited by the microwave plasma-assisted chemical vapor deposition (CVD) using a gas mixture of H-2/CH4/B2H6 and N-2. Growth results in sharp-edged, flat, and long CNWs rich in sp(2) as well as sp(3) hybridized phases. The achieved high values of k degrees (1.1 X 10(-2) cm s(-1)) and Delta E (85 mV) are much lower compared to those of the glassy carbon or undoped CNWs. The enhanced electrochemical performance of the B:CNW electrode facilitates the simultaneous detection of DNA purine bases: adenine and guanine. Both separated oxidation peaks for the independent determination of guanine and adenine were observed by means of cyclic voltammetry or differential pulse voltammetry. It is worth noting that the determined sensitivities and the current densities were about 1 order of magnitude higher than those registered by other electrodes.
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