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Finite-size scaling of flexoelectricity in Langmuir-Blodgett polymer thin films
- Source :
- Applied Physics Letters. 108:012908
- Publication Year :
- 2016
- Publisher :
- AIP Publishing, 2016.
-
Abstract
- The flexoelectric effect, which is a linear coupling between a strain gradient and electrical polarization, is a fundamental electromechanical property of all materials with potential for use in nanoscale devices, where strain gradients can be quite large. We report a study of the dependence of the flexoelectric response on thickness in ultrathin films of polar and non-polar polymers. The measurements of the flexoelectric response in non-polar polyethylene and the polar relaxor polymer polyvinylidene-co-trifluoroethylene-co-chlorofluoroethylene were made using a bent cantilever method and corrected for the contribution from the electrode oxide. The results show that the value of the flexoelectric coefficient increases with decreasing thickness, by up to a factor of 70 compared to the bulk value, reaching such enhanced values in films of only 10 nm thickness. These results are consistent with a model accounting for interfacial contributions, and underline how large electromechanical coupling can be produce...
- Subjects :
- chemistry.chemical_classification
Cantilever
Materials science
Physics and Astronomy (miscellaneous)
Condensed matter physics
Flexoelectricity
Nanotechnology
02 engineering and technology
Polymer
021001 nanoscience & nanotechnology
Polarization (waves)
01 natural sciences
Langmuir–Blodgett film
chemistry
0103 physical sciences
Electrode
Thin film
010306 general physics
0210 nano-technology
Scaling
Subjects
Details
- ISSN :
- 10773118 and 00036951
- Volume :
- 108
- Database :
- OpenAIRE
- Journal :
- Applied Physics Letters
- Accession number :
- edsair.doi...........7a1d42b996cd59a84c0ed2f49187a641