PROBING VISCOELASTIC PROFILE OF MOLECULAR LAYERS ON SOLID-LIQUID INTERFACES

摘要：

The acoustic responses of molecular films with continuous viscoelastic profiles adsorbed on solid-liquid interfaces probed by a quartz crystal microbalance (QCM) are analyzed using a continuum mechanics model.The results show that the changes of resonantfrequency shift and the dissipation factor of a QCM are determined by not only the adsorbed mass of molecules but also the viscoelastic profile of the adsorbed films.With the same amount of absorbed molecules,the resonant frequency shift and the dissipation factor change vary approximately linearly with the width of the film-solution interface in the profile.Thus QCM can be used as a very simple technique for characterizing viscoelastic properties of adsorbed films at nanometer scales.

关键词： Viscosity shear modulus adsorbed film

作者: J.J.Fang D.M.Zhu

作者单位: Department of Modem Physics,University of Science and Technology of China,Hefei,Anhui 230026,China Department of Modem Physics,University of Science and Technology of China,Hefei,Anhui 230026,China;(

会议类型: 国际会议

会议名称: 第二届国际非均质材料力学会议(The Second International Conference on Heterogeneous Material Mechanics)

会议地点: 安徽黄山

会议语种:英文

页码: 164-168

在线出版日期: 2008-06-03（万方平台首次上网日期，不代表论文的发表时间）