[9p-A22-1~12] 13.1 Fundamental properties, surface and interface, and simulations of Si related materials

2:30 PM - 2:45 PM JST(5:30 AM - 5:45 AM UTC)

[9p-A22-3] Water structure at SiO₂/solution interface and the effect of Ca²⁺ adsorption

〇Satoshi Nihonyanagi^1,2, Woongmo Sung², Tahei Tahara², Preeti Gahtori³, Juli Gibbs³ (1.Univ. of Tsukuba, 2.RIKEN, 3.Univ. of Alberta)

Keywords:

SiO2 interface

We investigated the water structure at the SiO2/aqueous solution interface and the effect of Ca2+ adsorption using interface-selective HD-VSFG spectroscopy. The Imχ(2) spectra of CaCl2 solutions were similar to those obtained with NaCl at pH 2–10, but showed a marked difference at pH 12, suggesting specific adsorption of Ca2+.