University of Kashan Journal of Nanostructures 2251-7871 3 4 2013 12 01 Sonochemical-Assisted Synthesis of Copper Oxide Nanoparticles and Its Application as Humidity Sensor 429 434 5929 10.7508/jns.2013.04.007 EN H. Abbasian Institute of Nano Science and Nano Technology, University of Kashan, Kashan, P.O. Box 87317-51167, I. R. Iran D. Ghanbari Institute of Nano Science and Nano Technology, University of Kashan, Kashan, P.O. Box 87317-51167, I. R. Iran G. Nabiyouni Department of Physics, Faculty of Science, Arak University, Arak 38156-88349, Iran Journal Article 2014 07 22 Cupric oxide nanostructures were synthesized via a simple reaction between copper nitrate and sodium hydroxide using a sonochemical-assisted method. The synthesized CuO was then characterized using X-ray diffraction, scanning electron microscopy, transmission electron microscopy, Fourier transform infrared, ultraviolet-visible and photoluminescence spectroscopy. Our studies show that the CuO nanostructure can be used as a humidity sensor with a short response time (about 6 sec) and a long recovery time (up to 650 sec). Variation of relative sensor impedance (defined as sensing) at relative humidity of 90% was measured to be about 80, which indicates a high sensing of our designed sensor. https://jns.kashanu.ac.ir/article_5929_f35cd155e733ae7387e026a5a6056b28.pdf