Abstract
In this paper, we report the synthesis of aligned ZnO nanorods with different growing conditions and the effects of the growing parameters on the nanorods humidity sensing characteristics. Six different kinds of samples are prepared with different synthesis parameters, including the zinc source, growing time, with or without PEI and post annealing. All samples show increasing resistance response to increasing relative humidity level at room temperature. This can be explained by the formation of electron depletion layer on the nanorods surface due to the adsorption of water molecules. It is demonstrated that, ZnO nanorods grown from Zn(Ac)2 with shorter growing time and post annealing shows the best overall sensing characteristics. The nanorods without post annealing show much higher sensitivity and faster response, but very fast degradation and unstable response to RH changes.
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Wang, Y., Yeow, J.T.W., Chen, LY. (2009). Synthesis of Aligned ZnO Nanorods with Different Parameters and Their Effects on Humidity Sensing. In: Mukhopadhyay, S.C., Gupta, G.S., Huang, R.YM. (eds) Recent Advances in Sensing Technology. Lecture Notes in Electrical Engineering, vol 49. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-00578-7_15
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DOI: https://doi.org/10.1007/978-3-642-00578-7_15
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