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篇目详细内容 |
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【篇名】 |
AFM-tip-induced crystallization of poly(ethylene oxide) melt droplets |
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【刊名】 |
Frontiers of Chemistry in China |
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【刊名缩写】 |
Front. Chem. China |
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【ISSN】 |
1673-3495 |
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【EISSN】 |
1673-3614 |
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【DOI】 |
10.1007/s11458-007-0035-3 |
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【出版社】 |
Higher Education Press and Springer-Verlag |
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【出版年】 |
2007 |
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【卷期】 |
2
卷2期 |
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【页码】 |
174-177
页,共
4
页 |
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【作者】 |
ZHU Dunshen;
SHOU Xingxian;
LIU Yixin;
CHEN Erqiang;
Stephen Zhengdi Cheng;
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【关键词】 |
atomic force microscopy; poly(ethylene oxide); tip-induced crystallization; nanoindentation |
【摘要】 |
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The AFM-tip-induced crystallization of poly(ethylene oxide) (PEO) melt droplets was studied. The melt droplets with a height of 50–100 nm and a lateral size of 2–3 μm were obtained by melting the PEO ultra-thin films on a mica surface. For the PEO samples with average molecular weights (Mn) ranging from 1.0×103 g/mol to 1.0×104 g/mol, the lateral perturbation from the AFM tip in the hard-tapping or nanoscratch modes could not induce the growth of the flaton lamellae. In contrast, under AFM nanoindentation mode, the tip-induced crystallization occurred when a sufficiently high vertical tip force was applied to the melt droplets of PEO with Mn≥1.0×104 g/mol. Moreover, the experimental results indicated that the AFM-tip-induced crystallization of PEO in the nanoindentation process had molecular weight dependence. |
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