Simple dissipative quartz crystal microbalance and methods for determining dissipation decay constants
- Department of Modern Physics, University of Science and Technology of China, Hefei 230027 (China)
We describe a simple dissipative quartz crystal microbalance (QCM) and two simple methods for determining the dissipation factor. The microbalance consists of an oscillator circuit interfaced with a personal computer. The oscillation voltages are undersampled through a low speed data acquisition card. Both methods for determining the resonant frequency and the dissipation factor assume a limited variation of the resonant frequency, which is the case for general applications of QCMs. The first method directly fits the undersampled data with a nonlinear function. The second method determines the resonant frequency of a quartz crystal by Fourier transformation of the acquired data. The dissipation factor is obtained by rectifying the undersampled data and then fitting them with an exponential function.
- OSTI ID:
- 20778932
- Journal Information:
- Review of Scientific Instruments, Vol. 77, Issue 3; Other Information: DOI: 10.1063/1.2173845; (c) 2006 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0034-6748
- Country of Publication:
- United States
- Language:
- English
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