[13p-A37-1~13] 4.6 Nanocarbon and 2D Materials

▼ [13p-A37-5] Binding Energy of Locally Physisorbed Oxygen Molecules in 2D Materials Measured by Laser Terahertz Emission Microscopy

〇(DC)Filchito Bagsican¹, Iwao Kawayama¹, Andrew Winchester², Sujoy Ghosh², Xiang Zhang³, Lulu Ma³, Minjie Wang³, Hironaru Murakami¹, Saikat Talapatra², Robert Vajtai³, Pulickel Ajayan³, Junichiro Kono³, Masayoshi Tonouchi¹ (1.Osaka Univ., 2.Southern Illinois Univ.-Carbondale, 3.Rice Univ.)

Keywords:2D materials, oxygen adsorption and desorption, laser THz emission microscopy

We used laser THz emission microscopy (LTEM) to experimentally determine the binding energy of oxygen molecules physically adsorbed on graphene and WS2 nanomaterials. We also used the imaging capability of LTEM to spatially monitor the distribution of oxygen molecules in monolayer graphene at different controlled conditions.