期刊
LANGMUIR
卷 27, 期 23, 页码 13983-13987出版社
AMER CHEMICAL SOC
DOI: 10.1021/la203434w
关键词
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资金
- NSF [EPS-0701892, CMMI-0709333]
- NRC at NIST
- Directorate For Engineering
- Div Of Civil, Mechanical, & Manufact Inn [1050685] Funding Source: National Science Foundation
We demonstrate the accurate nanoscale mapping of near-surface loss and storage moduli on a polystyrene-polypropylene blend with contact resonance force microscopy (CR-FM). These viscoelastic properties are extracted from spatially resolved maps of the contact resonance frequency and quality factor of the AFM: cantilever. We consider two methods of data acquisition: (i) discrete stepping between mapping points and (ii) continuous scanning. For point mapping and low-speed scanning, the values of the relative loss and storage modulus are in good agreement with the time-temperature superposition of low-frequency dynamic mechanical analysis measurements to the high frequencies probed by CR-FM.
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