[15p-S4_202-1~10] 9.2 Nanoparticles, Nanowires and Nanosheets

2:45 PM - 3:00 PM JST(5:45 AM - 6:00 AM UTC)Presentation by Applicant for JSAP Young Scientists Presentation Award

[15p-S4_202-4] Investigation into the Adsorption Mechanism of Water Molecules on Single-Crystal Zinc Oxide Nanowire Surfaces

〇(M1)Atsushi Doi^1,2, Tsunaki Takahashi¹, Hiromasa Sato², Keishi Kawazu³, Takuro Hosomi¹, Wataru Tanaka¹, Jiangyang Liu¹, Haruka Honda¹, Yuta Tsuji³, Toshiki Sugimoto^2,4, Takeshi Yanagida^1,5 (1.The Univ. of Tokyo, 2.IMS, 3.Kyushu Univ., 4.SOKENDAI, 5.IMCE)

Keywords:

Quartz Crystal Microbalance,Infrared Spectroscopy,Zinc Oxide

The adsorption and desorption behavior of water molecules on metal oxide surfaces significantly impacts the performance of gas sensors. While many studies have evaluated adsorption structures on clean surfaces under ultra-high vacuum and cryogenic temperatures, experimental evaluations under ambient conditions—such as room temperature and atmospheric pressure—remain scarce. In this study, we investigated the ZnO nanowire surface by quantifying water adsorption, performing infrared spectroscopy, and calculating adsorption energies under these realistic operating conditions. Our results reveal that on oxygen-deficient surfaces, the dissociation of water molecules is suppressed, and the amount of water adsorbed in the multilayer region is substantially decreased.