[17a-K503-1~6] 6.6 Probe Microscopy

10:30 AM - 10:45 AM JST(1:30 AM - 1:45 AM UTC)

[17a-K503-3] Detecting liquid-liquid interfaces on the sub-nm resolution
by measuring interfacial energy

〇(M1)Shuji Tokitoh¹, Yuto Nishiwaki¹, Ryo Taguchi¹, Toru Utsunomiya¹, Takashi Ichii¹ (1.Kyoto Univ.)

Keywords:

atomic force microscopy,liquid-liquid interfaces

We attempted to detect the interface between molten metal and aqueous solution by frequency modulation atomic force microscopy (FM-AFM). We focused on the interfacial energy and viscosity, which were measured respectively as a conservative interaction and a dissipative interaction. As a result, discontinuous changes were observed at the interface in both the frequency distance dependence curve and the energy dissipation distance dependence curve. In particular, the frequency distance dependence curve was detected with sub-nm resolution, confirming the usefulness of this method for detecting the position of the interface between two liquids with a large difference in surface tension.