The microstructure and electrochemical properties of boron-doped nanocrystalline diamond film electrodes and their application in non-enzymatic glucose detection
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Boron-doped nanocrystalline diamond (BDND) films were deposited on Si(100) by microwave plasma chemical vapor deposition using trimethyl boron as boron source. The surface morphology, microstructure, and electrochemical properties of the BDND films were investigated. Cyclic voltammograms indicated that the BDND film electrode exhibited good reversibility and repeatability of electrode reaction using [Fe(CN)6]3−/4− as redox couple. The non-enzymatic glucose sensor based on the as-prepared BDND film electrode without any modification was developed, and the selective detection of glucose in alkaline solution containing interference species of ascorbic acid and uric acid was demonstrated. The results showed that glucose can be directly oxidized with a wide linear range and high sensitivity, and selectively detected in the presence of uric acid and ascorbic acid in alkaline solution using the as-prepared BDND film electrode.
KeywordsBoron-doped diamond film Microstructure Electrochemical properties Non-enzymatic glucose sensor
This work was financially supported by the National Nature Science Foundation of China (51002078 and 61222403), the Fundamental Research Funds for the Central Universities (No. 30920130111019, 30920130111017, and NE2012004), the QingLan Project of Jiangsu Province, the Natural Science Foundation of Jiangsu Province of China (BK2011709), Doctoral Program Foundation of Ministry of Education of China (No. 20123218110030), and the opened fund of the state key laboratory on integrated optoelectronics (No. IOSKL2012KF06).