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Charge collection kinetics on ferroelectric polymer surface using charge gradient microscopy

A charge gradient microscopy (CGM) probe was used to collect surface screening charges on poly(vinylidene fluoride-trifluoroethylene) [P(VDF-TrFE)] thin films. These charges are naturally formed on unscreened ferroelectric domains in ambient condition. The CGM data were used to map the local electri...

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Autores principales: Choi, Yoon-Young, Tong, Sheng, Ducharme, Stephen, Roelofs, Andreas, Hong, Seungbum
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group 2016
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4853730/
https://www.ncbi.nlm.nih.gov/pubmed/27138943
http://dx.doi.org/10.1038/srep25087
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author Choi, Yoon-Young
Tong, Sheng
Ducharme, Stephen
Roelofs, Andreas
Hong, Seungbum
author_facet Choi, Yoon-Young
Tong, Sheng
Ducharme, Stephen
Roelofs, Andreas
Hong, Seungbum
author_sort Choi, Yoon-Young
collection PubMed
description A charge gradient microscopy (CGM) probe was used to collect surface screening charges on poly(vinylidene fluoride-trifluoroethylene) [P(VDF-TrFE)] thin films. These charges are naturally formed on unscreened ferroelectric domains in ambient condition. The CGM data were used to map the local electric current originating from the collected surface charges on the poled ferroelectric domains in the P(VDF-TrFE) thin films. Both the direction and amount of the collected current were controlled by changing the polarity and area of the poled domains. The endurance of charge collection by rubbing the CGM tip on the polymer film was limited to 20 scan cycles, after which the current reduced to almost zero. This degradation was attributed to the increase of the chemical bonding strength between the external screening charges and the polarization charges. Once this degradation mechanism is mitigated, the CGM technique can be applied to efficient energy harvesting devices using polymer ferroelectrics.
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spelling pubmed-48537302016-05-16 Charge collection kinetics on ferroelectric polymer surface using charge gradient microscopy Choi, Yoon-Young Tong, Sheng Ducharme, Stephen Roelofs, Andreas Hong, Seungbum Sci Rep Article A charge gradient microscopy (CGM) probe was used to collect surface screening charges on poly(vinylidene fluoride-trifluoroethylene) [P(VDF-TrFE)] thin films. These charges are naturally formed on unscreened ferroelectric domains in ambient condition. The CGM data were used to map the local electric current originating from the collected surface charges on the poled ferroelectric domains in the P(VDF-TrFE) thin films. Both the direction and amount of the collected current were controlled by changing the polarity and area of the poled domains. The endurance of charge collection by rubbing the CGM tip on the polymer film was limited to 20 scan cycles, after which the current reduced to almost zero. This degradation was attributed to the increase of the chemical bonding strength between the external screening charges and the polarization charges. Once this degradation mechanism is mitigated, the CGM technique can be applied to efficient energy harvesting devices using polymer ferroelectrics. Nature Publishing Group 2016-05-03 /pmc/articles/PMC4853730/ /pubmed/27138943 http://dx.doi.org/10.1038/srep25087 Text en Copyright © 2016, Macmillan Publishers Limited http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/
spellingShingle Article
Choi, Yoon-Young
Tong, Sheng
Ducharme, Stephen
Roelofs, Andreas
Hong, Seungbum
Charge collection kinetics on ferroelectric polymer surface using charge gradient microscopy
title Charge collection kinetics on ferroelectric polymer surface using charge gradient microscopy
title_full Charge collection kinetics on ferroelectric polymer surface using charge gradient microscopy
title_fullStr Charge collection kinetics on ferroelectric polymer surface using charge gradient microscopy
title_full_unstemmed Charge collection kinetics on ferroelectric polymer surface using charge gradient microscopy
title_short Charge collection kinetics on ferroelectric polymer surface using charge gradient microscopy
title_sort charge collection kinetics on ferroelectric polymer surface using charge gradient microscopy
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4853730/
https://www.ncbi.nlm.nih.gov/pubmed/27138943
http://dx.doi.org/10.1038/srep25087
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