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Title: Electric field directed formation of aligned conjugated polymer fibers

Abstract

Alternating current (AC) electric fields effectively align poly (3-alkylthiophene) (P3AT) fibers during a one-dimensional crystallization process. Structural, mechanical and electrical properties have been probed using microscopy, small angle neutron scattering (SANS), atomic force microscopy (AFM), x-ray diffraction (XRD), rheology, UV-vis spectroscopy, and dielectric spectroscopy. Optimum frequency and amplitudes were identified for specific P3AT concentrations and for variable solvent quality. Optical microscopy along with SANS and XRD demonstrate alignment persists over both micrometer and nanometer length scales. Small amplitude oscillatory shear rheology also showed that the shear modulus increased for aligned fibers. The structural changes were correlated to improvements in electric conductivity as probed by dielectric spectroscopy. XRD experiments performed with variable sample orientations also showed that the P3HT stacking direction was aligned parallel to the direction of the fiber axis. Electric field alignment was also possible for other alkyl-thiophene polymers and for polymers with simple backbone repeat units.

Authors:
ORCiD logo;
Publication Date:
Research Org.:
Univ. of Washington, Seattle, WA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1467635
Alternate Identifier(s):
OSTI ID: 1467613
Grant/Contract Number:  
SC0010282
Resource Type:
Accepted Manuscript
Journal Name:
Soft Matter
Additional Journal Information:
Journal Volume: 13; Journal Issue: 21; Journal ID: ISSN 1744-683X
Publisher:
Royal Society of Chemistry
Country of Publication:
United States
Language:
English
Subject:
77 NANOSCIENCE AND NANOTECHNOLOGY

Citation Formats

Xi, Yuyin, and Pozzo, Lilo D. Electric field directed formation of aligned conjugated polymer fibers. United States: N. p., 2017. Web. doi:10.1039/C7SM00485K.
Xi, Yuyin, & Pozzo, Lilo D. Electric field directed formation of aligned conjugated polymer fibers. United States. doi:10.1039/C7SM00485K.
Xi, Yuyin, and Pozzo, Lilo D. Sun . "Electric field directed formation of aligned conjugated polymer fibers". United States. doi:10.1039/C7SM00485K. https://www.osti.gov/servlets/purl/1467635.
@article{osti_1467635,
title = {Electric field directed formation of aligned conjugated polymer fibers},
author = {Xi, Yuyin and Pozzo, Lilo D.},
abstractNote = {Alternating current (AC) electric fields effectively align poly (3-alkylthiophene) (P3AT) fibers during a one-dimensional crystallization process. Structural, mechanical and electrical properties have been probed using microscopy, small angle neutron scattering (SANS), atomic force microscopy (AFM), x-ray diffraction (XRD), rheology, UV-vis spectroscopy, and dielectric spectroscopy. Optimum frequency and amplitudes were identified for specific P3AT concentrations and for variable solvent quality. Optical microscopy along with SANS and XRD demonstrate alignment persists over both micrometer and nanometer length scales. Small amplitude oscillatory shear rheology also showed that the shear modulus increased for aligned fibers. The structural changes were correlated to improvements in electric conductivity as probed by dielectric spectroscopy. XRD experiments performed with variable sample orientations also showed that the P3HT stacking direction was aligned parallel to the direction of the fiber axis. Electric field alignment was also possible for other alkyl-thiophene polymers and for polymers with simple backbone repeat units.},
doi = {10.1039/C7SM00485K},
journal = {Soft Matter},
number = 21,
volume = 13,
place = {United States},
year = {2017},
month = {1}
}

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Works referenced in this record:

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