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Title: Polypeptide Composite Particle-Assisted Organization of π-Conjugated Polymers into Highly Crystalline “Coffee Stains”

Abstract

We demonstrate that homopolypeptides covalently tethered to anisotropically shaped silica particles induce crystalline ordering of representative semiconducting polymers. Films drop-cast from chloroform dispersions of poly(γ-stearyl-l-glutamate) (PSLG) composite particles and poly(3-hexythiophene) (P3HT) led to highly ordered crystalline structures of P3HT. Hydrophobic–hydrophobic interactions between the alkyl side chains of P3HT and PSLG were the main driving force for P3HT chain ordering into the crystalline assemblies. It was found that the orientation of rigid P3HT fibrils on the substrate adopted the directionality of the evaporating front. Regardless of the PSLG-coated particle dimensions used, the drop-cast films displayed patterns that were shaped by the coffee ring and Marangoni effects. PSLG-coated particles of high axial ratio (4.2) were more efficient in enhancing the electronic performance of P3HT than low axial ratio (2.6) homologues. Devices fabricated from the ordered assemblies displayed improved charge-carrier transport performance when compared to devices fabricated from P3HT alone. Furthermore, these results suggest that PSLG can favorably mediate the organization of semiconducting polymers.

Authors:
ORCiD logo [1];  [1];  [2];  [3];  [1];  [1];  [1]; ORCiD logo [1]
  1. Georgia Inst. of Technology, Atlanta, GA (United States)
  2. Stanford Linear Accelerator Center, Stanford, CA (United States)
  3. Molecular Vista, Inc., San Jose, CA (United States)
Publication Date:
Research Org.:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1463303
Grant/Contract Number:  
[AC02-76SF00515; DMR-1505105; DMR-1609058]
Resource Type:
Accepted Manuscript
Journal Name:
ACS Applied Materials and Interfaces
Additional Journal Information:
[ Journal Volume: 9; Journal Issue: 39]; Journal ID: ISSN 1944-8244
Publisher:
American Chemical Society (ACS)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; coffee ring effect; electronic materials; Marangoni flow; OFET devices; polypeptide-assisted self-assembly; semiconducting polymers

Citation Formats

Rosu, Cornelia, Chu, Ping -Hsun, Tassone, Christopher J., Park, Katherine, Balding, Paul L., Park, Jung Ok, Srinivasarao, Mohan, and Reichmanis, Elsa. Polypeptide Composite Particle-Assisted Organization of π-Conjugated Polymers into Highly Crystalline “Coffee Stains”. United States: N. p., 2017. Web. doi:10.1021/acsami.7b10223.
Rosu, Cornelia, Chu, Ping -Hsun, Tassone, Christopher J., Park, Katherine, Balding, Paul L., Park, Jung Ok, Srinivasarao, Mohan, & Reichmanis, Elsa. Polypeptide Composite Particle-Assisted Organization of π-Conjugated Polymers into Highly Crystalline “Coffee Stains”. United States. doi:10.1021/acsami.7b10223.
Rosu, Cornelia, Chu, Ping -Hsun, Tassone, Christopher J., Park, Katherine, Balding, Paul L., Park, Jung Ok, Srinivasarao, Mohan, and Reichmanis, Elsa. Tue . "Polypeptide Composite Particle-Assisted Organization of π-Conjugated Polymers into Highly Crystalline “Coffee Stains”". United States. doi:10.1021/acsami.7b10223. https://www.osti.gov/servlets/purl/1463303.
@article{osti_1463303,
title = {Polypeptide Composite Particle-Assisted Organization of π-Conjugated Polymers into Highly Crystalline “Coffee Stains”},
author = {Rosu, Cornelia and Chu, Ping -Hsun and Tassone, Christopher J. and Park, Katherine and Balding, Paul L. and Park, Jung Ok and Srinivasarao, Mohan and Reichmanis, Elsa},
abstractNote = {We demonstrate that homopolypeptides covalently tethered to anisotropically shaped silica particles induce crystalline ordering of representative semiconducting polymers. Films drop-cast from chloroform dispersions of poly(γ-stearyl-l-glutamate) (PSLG) composite particles and poly(3-hexythiophene) (P3HT) led to highly ordered crystalline structures of P3HT. Hydrophobic–hydrophobic interactions between the alkyl side chains of P3HT and PSLG were the main driving force for P3HT chain ordering into the crystalline assemblies. It was found that the orientation of rigid P3HT fibrils on the substrate adopted the directionality of the evaporating front. Regardless of the PSLG-coated particle dimensions used, the drop-cast films displayed patterns that were shaped by the coffee ring and Marangoni effects. PSLG-coated particles of high axial ratio (4.2) were more efficient in enhancing the electronic performance of P3HT than low axial ratio (2.6) homologues. Devices fabricated from the ordered assemblies displayed improved charge-carrier transport performance when compared to devices fabricated from P3HT alone. Furthermore, these results suggest that PSLG can favorably mediate the organization of semiconducting polymers.},
doi = {10.1021/acsami.7b10223},
journal = {ACS Applied Materials and Interfaces},
number = [39],
volume = [9],
place = {United States},
year = {2017},
month = {9}
}

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