High-Resolution Studies of Domain Switching Behavior in Nanostructured Ferroelectric Polymers

被引：113
作者：
Sharma, Pankaj
Reece, Timothy J.
Ducharme, Stephen
Gruverman, Alexei [1 ]
机构：
[1] Univ Nebraska, Dept Phys & Astron, Lincoln, NE 68588 USA
来源：
NANO LETTERS | 2011年 / 11卷 / 05期
关键词：
Ferroelectric polymer; disorder; domain switching; piezoresponse force microscopy; LANGMUIR-BLODGETT-FILMS; PIEZORESPONSE FORCE MICROSCOPY; THIN-FILMS; NANOSCALE; COPOLYMER; MEMORIES;
D O I：
10.1021/nl200221z
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
We have demonstrated an effective electrical control of polarization in the individual crystalline nanomesas of the ferroelectric polymer, poly(vinylidene fluoride)-trifluoroethylene (PVDF-TrFE) and its relation to the polymer structure. The mechanism of polarization reversal has been investigated via sub-10 nm real space imaging of domain pattern evolution under an applied electric field. The domain switching behavior revealed in PVDF-TrFE nanomesas is drastically different from that observed in inorganic solid-state crystalline ferroelectrics. The nanoscale features of the switching process include remote domain nucleation and spatially nonuniform wall velocity. Local switching spectroscopy and domain dynamics studies relate the observed switching features to a random-bond type disorder associated with defects in conformation and molecular packing.
引用
收藏
页码：1970 / 1975
页数：6
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