Micro-glassy carbon inks for thick-film electrodes
Micro-glassy carbon inks for thick-film electrodes
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DOI：
10.1016/s0013-4686(96)00401-x
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发表时间：
1997-01-01
影响因子：
6.6
通讯作者：
Girault, HH
中科院分区：
文献类型：
--
作者：
Seddon, BJ;Osborne, MD;Girault, HH
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.
