[10p-N403-1~17] 9.2 Nanoparticles, Nanowires and Nanosheets

△ [10p-N403-8] Tracking of Volatile Aliphatic Molecules in SAM Using Deuterated SAM-modified Nanowires

〇(M1)Yu Yamaguchi¹, Takuro Hosomi^1,3, Kazuki Nagashima^1,3, Tsunaki Takahashi^1,3, Guozhu Zhang¹, Masaki Kanai², Takeshi Yanagida^1,2 (1.The Univ. of Tokyo, 2.Kyushu Univ., 3.JST PRESTO)

Keywords:nanowire, self-assembled monolayer, infrared spectroscopy

Research on developing new organic-inorganic functional materials by modifying self-assembled monolayers (SAM) on metal oxides is actively taken place in the world. We recently found that it is possible to enhance nonanal-sensing ability of ZnO single crystalline nanowires by modifying long alkyl chain SAM on their surfaces. This is attributed to a phenomenon that the molecules are taken in SAM and effectively oxidized on the surfaces. However, since it was impossible to distinguish alkyl chains of the aldehyde molecules and the SAM by spectroscopic measurements like IR, it was unclear how the molecules behave in the SAM. In this research, deuterated phosphonic acids were adopted as SAM molecules so that the adsorbing molecules and SAM are distinguishable. We succeeded in obtaining information for speculating behavior of the molecules in the SAM, such as amount, orientation, and conformation. It is notable that thermal motion of SAM plays crucial role in taking in molecules.