Zhang Yaozhong, Du Binyang, Chen Xinan, Ma Hongwei
Key Laboratory of Macromolecular Synthesis and Functionalization (Ministry of Education), Department of Polymer Science & Engineering, Zhejiang University, Hangzhou 310027, USA.
Anal Chem. 2009 Jan 15;81(2):642-8. doi: 10.1021/ac8019762.
A quartz crystal microbalance (QCM) consists of a resonator, which measures the resonance frequency of the quartz slab. When coupled with a network analyzer or coupled with impulse excitation technology, QCM gives additional impedance or dissipation information, respectively. This report provides a set of equations that bring the QCM community a convergence of the dissipation and impedance analysis. Equations derived from the complex frequency shift were applied to quantitatively analyze the dissipation data of polymer brushes obtained from QCM-D. The obtained viscoelastic properties of polymer brushes were then compared with those obtained by the Voigt model method. We believe that these equations will be useful in quantitative studies of interfacial phenomena accompanied with mass or viscoelasticity changes.
石英晶体微天平（QCM）由一个谐振器组成，该谐振器测量石英板的共振频率。当与网络分析仪耦合或与脉冲激发技术耦合时，QCM分别提供额外的阻抗或耗散信息。本报告提供了一组方程，使QCM领域的耗散和阻抗分析趋于一致。从复频移导出的方程被应用于定量分析从QCM-D获得的聚合物刷的耗散数据。然后将获得的聚合物刷的粘弹性性质与通过Voigt模型方法获得的性质进行比较。我们相信这些方程将有助于对伴随着质量或粘弹性变化的界面现象进行定量研究。
