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Nanoscale Shape-Memory Function in Highly Cross-Linked Polymers
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DOI：10.1021/nl8022737.png)
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Topographic engraving of structures in polymer surfaces attracts widespread interest for application in imprint lithography and data storage. We study the nonlinear interaction of nanoindents written in close proximity, 20-100 nm, to one another in a highly cross-linked polystyrene matrix. The indents are created thermomechanically by applying heat and force stimuli of 10 mu s duration to a tip, thereby raising the polymer temperature to 250 degrees C and exerting contact pressures of up to 1 GPa. We show that on the nanoscale plastic deformation is highly reversible providing outstanding shape-memory functionality of the material.
Keyword:
GLASSY-POLYMERS
PLASTIC-DEFORMATION
DATA-STORAGE
DENSITY
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9.1
论文数:
2.7W
被引数:
16.5W
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