A novel carbon-based ionic conductor for humidity sensors
作者： Jerzy P. Łukaszewicz , Magdalena Skompska
DOI: 10.1016/J.SNB.2005.04.004
关键词: Inorganic chemistry 、 Electrical resistivity and conductivity 、 Carbon film 、 Ionic bonding 、 Materials science 、 Carbon 、 Water vapor 、 Adsorption 、 Alkali metal 、 Relative humidity
摘要: Abstract Carbon films modified by means of Na2CO3 were tested as a novel material for the construction humidity sensors. On contrary, to “virgin” carbon and some alkali metal compounds like hydroxides, acetates or chlorides, Na2CO3-modified materials exhibit mixed conduction mechanism. Beside hole/electron carbon, behave ionic conductor provided relative is high enough. During carbonisation, applied modifier forms nano-crystals on surface in bulk semiconductor matrix. The inorganic dissolve dissociate layer adsorbed water. Ions produced this way increase electric conductivity system contributing significantly total current passing through carbonate-modified films. highly sensitive water vapour. Water adsorption induced resistance changes film are reversible therefore may be obtained other carbonates modifiers similar way.
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