Local thermomechanical characterization of phase transitions using band excitation atomic force acoustic microscopy with heated probe
Local thermomechanical characterization of phase transitions using band excitation atomic force acoustic microscopy with heated probe
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DOI：
10.1063/1.2965470
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发表时间：
2008-08-18
影响因子：
4
通讯作者：
Kalinin, S. V.
中科院分区：
文献类型：
--
作者：
Jesse, S.;Nikiforov, M. P.;Kalinin, S. V.
提出了一种利用带激发声力显微镜研究高分子材料（聚对苯二甲酸乙二醇酯）相变的热机械特性的方法。这种方法允许独立测量的谐振频率，Q因子，和振荡幅度的尖端表面接触作为尖端温度的函数，从该尖端表面弹簧常数和机械耗散的热演化可以提取。我们展示了一个加热协议，保持接触面积和接触力恒定，从而允许可重复的测量和定量提取的材料特性，包括基于压痕的弹性模量和损耗模量的温度依赖性。(C)2008年美国物理学会。
An approach for thermomechanical characterization of phase transitions in polymeric materials (polyethyleneterephthalate) by band excitation acoustic force microscopy is developed. This methodology allows the independent measurement of resonance frequency, Q factor, and oscillation amplitude of a tip-surface contact as a function of tip temperature, from which the thermal evolution of tip-surface spring constant and mechanical dissipation can be extracted. We demonstrate a heating protocol which keeps the contact area and contact force constant, thus allowing for reproducible measurements and quantitative extraction of material properties including temperature dependence of indentation-based elastic and loss moduli. (C) 2008 American Institute of Physics.