1434 ナノバブルの局所界面構造に関する分子動力学解析  [in Japanese] A Molecular Dynamics Study on the Local Interfacial Structure of Nanobubbles  [in Japanese]

A molecular dynamics simulation of aqueous surfactant system is carried out to investigate the microscopic structure of gas-liquid interface. To analyze the interfacial structure which has the local fluctuation, we propose the new definition of interface which maintains the local and instantaneous information. After this method is applied to the interface of nanobubble, it was found that the bubble region did not hold its spherical shape instantaneously and its surface fluctuated locally. It was also found that the rotational relaxation time of water molecules at the bubble surface adsorbed by surfactants was longer than that of bulk liquid. So it can be though that water molecules near the interface are structurized by surfactants.