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Author Zheng, Huadan ♦ Yin, Xukun ♦ Zhang, Guofeng ♦ Wu, Hongpeng ♦ Liu, Xiaoli ♦ Ma, Weiguang ♦ Zhang, Lei ♦ Yin, Wangbao ♦ Xiao, Liantuan ♦ Jia, Suotang ♦ Dong, Lei ♦ Tittel, Frank K.
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS ♦ AGING ♦ COOLING ♦ ERRORS ♦ GLASS ♦ HEATING ♦ LOSSES ♦ NANOWIRES ♦ PMMA ♦ QUARTZ ♦ RESONANCE ♦ RESONATORS ♦ SPECTROSCOPY ♦ TEMPERATURE DEPENDENCE ♦ TRANSITION TEMPERATURE ♦ TUNING
Abstract Quartz-enhanced conductance spectroscopy is developed as an analytical tool to investigate dynamic nanomechanical behaviors of polymer wires, in order to determine the glass transition temperature (T{sub g}). A polymethyl methacrylate (PMMA) microwire with a diameter of 10 μm was bridged across the prongs of a quartz tuning fork (QTF). With the advantage of QTF self-sensing as compared with micro-cantilevers or other resonators, the resonance frequency and Q factor can be directly determined by means of its electrical conductance spectra with respect to the frequency of the external excitation source (dI/dV vs f), and therefore, no optical beam is required. The T{sub g} of the PMMA microwire was determined by the maximum loss modulus of the QTF, calculated from the resonance frequency and the Q factor as a function of temperature. The measured T{sub g} of the PMMA is 103 °C with an error of ±2 °C. Both heating/cooling and physical aging experiments were carried out, demonstrating that the technique is both reversible and reproducible.
ISSN 00036951
Educational Use Research
Learning Resource Type Article
Publisher Date 2015-11-30
Publisher Place United States
Journal Applied Physics Letters
Volume Number 107
Issue Number 22


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