pH sensitivity of nanocrystalline diamond films

被引:11
作者
Christiaens, P.
Abouzar, M. H.
Poghossian, A.
Wagner, T.
Bijnens, N.
Williams, O. A.
Daenen, M.
Haenen, K.
Douheret, O.
D'Haen, J.
Mekhalif, Z.
Schoening, M. J.
Wagner, P.
机构
[1] Hasselt Univ, Mat Res Inst, B-3590 Diepenbeek, Belgium
[2] IMEC vzw, Div IMOMEC, B-3590 Diepenbeek, Belgium
[3] Aachen Univ Appl Sci, Inat Nao & Biotechnol IBN 2, D-52428 Julich, Germany
[4] Res Ctr Julich GmbH, Inst Bio & Nanosyst, D-52425 Julich, Germany
[5] Fac Univ Notre Dame Paix, Lab Chem & Electrochem Surfaces, B-5000 Namur, Belgium
来源
PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE | 2007年 / 204卷 / 09期
关键词
D O I
10.1002/pssa.200776326
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
The pH-sensitive properties of hydrogen- and oxygen-terminated nanocrystalline diamond (NCD) films have been investigated using a field-effect-based capacitive electrolyte-diamond-insulator-semiconductor (EDIS) structure as transducer. The NCD thin films (100-500 nm) were grown on p-Si-SiO2 Substrates by microwave plasma-enhanced chemical vapour deposition. The electrochemical characterisation of EDIS sensors with NCD films of different thicknesses has been performed in buffer solutions of pH 3 to pH 11 by means of capacitance-voltage and constant-capacitance methods. The developed EDIS sensors with O-terminated NCD surfaces show an average pH-sensitivity of 38 mV/pH A slightly smaller pH-sensitivity of 29-36 mV/pH was observed for the EDIS structure with H-terminated NCD surfaces. (C) 2007 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
引用
收藏
页码:2925 / 2930
页数:6
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