Convergence of Dissipation and Impedance Analysis of Quartz Crystal Microbalance Studies

详细信息    查看全文

• 作者：Yaozhong Zhang ; Binyang Du ; Xinan Chen ; Hongwei Ma
• 刊名：Analytical Chemistry
• 出版年：2009
• 出版时间：January 15, 2009
• 年：2009
• 卷：81
• 期：2
• 页码：642-648
• 全文大小：243K
• 年卷期：v.81,no.2(January 15, 2009)
• ISSN：1520-6882

文摘

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.