Preparation of grain size controlled boron-doped diamond thin films and their applications in selective detection of glucose in basic solutions  

作　　者：ZHAO JianWen1,2,WANG JinLiang3,ZHI JinFang3 & ZHANG ZhiMing4 1College of Chemistry and Chemical Engineering,Jishou University,Jishou 416000,China 2Schools of Materials Science and Engineering,Nanyang Technological University,639798,Singapore 3Laboratory of Organic Optoelectronic Functional Materials and Molecular Engineering,Technical Institute of Physics and Chemistry & Graduate University of Chinese Academy of Sciences,Beijing 100080,China 4Research Institute of Micro-Nano Science and Technology,Shanghai Jiao Tong University,Shanghai 200030,China 

出　　处：《Science China Chemistry》2010年第6期1378-1384,共7页中国科学（化学英文版）

基　　金：the support from the Scientific Research Fund of Hunan Provincial Education Department (09B084);the National Natural Science Foundation of China (20773150)

摘　　要：Boron-doped diamond (BDD) thin films with different crystal grain sizes were prepared by controlling the reacting gas pressure using hot filament chemical vapor deposition (HFCVD).The morphologies and structures of the prepared diamond thin films were characterized by scanning electron microscopy (SEM) and Raman spectroscopy.The electrochemical responses of K4Fe(CN)6 on different BDD electrodes were investigated.The results suggested that electron transfer was faster at the boron-doped nanocrystalline diamond (BDND) thin film electrodes in comparison with that at other BDD thin film electrodes.The prepared BDD thin film electrodes without any modification were used to directly detect glucose in the basic solution.The results showed that the as-prepared BDD thin film electrodes exhibited good selectivity for detecting glucose in the presence of ascorbic acid (AA) and uric acid (UA).The higher sensitivity was observed on the BDND thin film grown on the boron-doped microcrystalline diamond (BDMD) thin film surface,and the linear response range,sensitivity and the low detection limit were 0.25–10 mM,189.1 μA mmol-1 cm-2 and 25 μM (S/N=3) for glucose in the presence of AA and UA,respectively.Boron-doped diamond (BDD) thin films with different crystal grain sizes were prepared by controlling the reacting gas pressure using hot filament chemical vapor deposition (HFCVD).The morphologies and structures of the prepared diamond thin films were characterized by scanning electron microscopy (SEM) and Raman spectroscopy.The electrochemical responses of K4Fe(CN)6 on different BDD electrodes were investigated.The results suggested that electron transfer was faster at the boron-doped nanocrystalline diamond (BDND) thin film electrodes in comparison with that at other BDD thin film electrodes.The prepared BDD thin film electrodes without any modification were used to directly detect glucose in the basic solution.The results showed that the as-prepared BDD thin film electrodes exhibited good selectivity for detecting glucose in the presence of ascorbic acid (AA) and uric acid (UA).The higher sensitivity was observed on the BDND thin film grown on the boron-doped microcrystalline diamond (BDMD) thin film surface,and the linear response range,sensitivity and the low detection limit were 0.25–10 mM,189.1 μA mmol-1 cm-2 and 25 μM (S/N=3) for glucose in the presence of AA and UA,respectively.

关 键 词：DIAMOND THIN films ELECTROCHEMICAL properties SELECTIVE GLUCOSE detection 

分 类 号：Q503[生物学—生物化学]