Micro-glassy carbon inks for thick-film electrodes

被引:25
作者
Seddon, BJ
Osborne, MD
Lagger, G
Dryfe, RAW
Loyall, U
Schafer, H
Girault, HH
机构
[1] ECOLE POLYTECH FED LAUSANNE, LAB ELECTROCHIM, CH-1015 LAUSANNE, SWITZERLAND
[2] METROHM AG, CH-9101 HERISAU, SWITZERLAND
关键词
thick-film electrodes; Sigradur G carbon; conducting carbon ink; random array microelectrodes; partially blocked electrodes;
D O I
10.1016/S0013-4686(96)00401-X
中图分类号
O646 [电化学、电解、磁化学];
学科分类号
081704 ;
摘要
A description follows concerning the formulation of a model conductive ink system and the physico-chemical characterisation of thick films based on spherical glassy carbon micro-particles with low molecular mass polystyrene binding polymer. The study considers the effects of the carbon and polymer (C/P) mass ratio from 0.43 to 9.0 on the film surface morphology, electrical resistance and electrochemical properties. The surface structure of micro-glassy carbon films was examined by electron microscopy showing that surfaces have high polystyrene content when the C/P ratio falls below 2.3. Electrical resistances corresponding to dielectric materials are found for thick films prepared with inks containing 30% m/m or less carbon in the formulation. It was necessary to introduce the micro-spherical carbon to proportions beyond 60% m/m in order to reduce film resistances to less than 1 k Omega. The electrochemical properties of micro-glassy carbon films correlate with C/P ink values, where a transition is observed from insulator characteristics to random array microelectrode and ultimately a micro-porous macroelectrode. (C) 1997 Elsevier Science Ltd.
引用
收藏
页码:1883 / 1894
页数:12
相关论文
共 19 条
[1]   CARBON PASTE ELECTRODES [J].
ADAMS, RN .
ANALYTICAL CHEMISTRY, 1958, 30 (09) :1576-1576
[2]   VOLTAMMETRIC DETERMINATION OF CADMIUM ON A CARBON PASTE ELECTRODE MODIFIED WITH A CHELATING RESIN [J].
AGRAZ, R ;
SEVILLA, MT ;
PINILLA, JM ;
HERNANDEZ, L .
ELECTROANALYSIS, 1991, 3 (4-5) :393-397
[3]   CHARGE-TRANSFER AT PARTIALLY BLOCKED SURFACES - A MODEL FOR THE CASE OF MICROSCOPIC ACTIVE AND INACTIVE SITES [J].
AMATORE, C ;
SAVEANT, JM ;
TESSIER, D .
JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 1983, 147 (1-2) :39-51
[4]  
AOKI K, 1981, J ELECTROANAL CHEM, V122, P19, DOI 10.1016/0368-1874(81)87338-8
[5]  
Bard A.J, 1980, Electrochemical methods: Fundamentals and applications
[6]   A STUDY OF THE KINETICS OF THE REACTION BETWEEN FERROCENE MONOCARBOXYLIC ACID AND GLUCOSE-OXIDASE USING THE ROTATING-DISC ELECTRODE [J].
BARTLETT, PN ;
PRATT, KFE .
JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 1995, 397 (1-2) :53-60
[7]   ULTRAMICROELECTRODE ENSEMBLES - COMPARISON OF EXPERIMENTAL AND THEORETICAL RESPONSES AND EVALUATION OF ELECTROANALYTICAL DETECTION LIMITS [J].
CHENG, IF ;
WHITELEY, LD ;
MARTIN, CR .
ANALYTICAL CHEMISTRY, 1989, 61 (07) :762-766
[8]   ULTRAMICRODISK ELECTRODE ENSEMBLES PREPARED BY INCORPORATING CARBON PASTE INTO A MICROPOROUS HOST MEMBRANE [J].
CHENG, IF ;
MARTIN, CR .
ANALYTICAL CHEMISTRY, 1988, 60 (19) :2163-2165
[9]   SILICA-GEL MODIFIED CARBON COMPOSITE ELECTRODES [J].
KOPANICA, M ;
STARA, V .
ELECTROANALYSIS, 1991, 3 (01) :13-16
[10]   ELECTROOXIDATION OR REDUCTION OF ORGANIC COMPOUNDS INTO AQUEOUS SOLUTIONS USING CARBON PASTE ELECTRODE [J].
KUWANA, T ;
FRENCH, WG .
ANALYTICAL CHEMISTRY, 1964, 36 (01) :241-&