Controlling the Formation and Orientation of Terraced Nanoscale Ribbons of a Thiophene-Based Copolymer

Published

March 24, 2009

Author(s)

Dean M. DeLongchamp, Regis J. Kline, Youngsuk Jung, David Germack, Eric K. Lin, Andrew Moad, Lee J. Richter, Michael F. Toney, Martin Heeney, Iain McCulloch

Abstract

Terraced nanoscale ribbon domains of a poly(2,5-bis(3-alkylthiophen-2-yl) thieno[3,2-b]thiophene) form after thin films are cooled from its highest-temperature phase. A simple flow coating procedure can induce high levels of ribbon orientation and even greater extents of molecular orientation. The degree of molecular orientation is quite small after coating, but increases dramatically after a heating and cooling cycle (to 240 C), indicating that an oriented minority templates the whole film structure The resultant crystal morphology exhibits domain shape and orientation behavior typically associated with block copolymers.

Citation

ACS Nano

Volume

3

Issue

4

Pub Type

Journals

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Keywords

polythiophene, nanoribbon, orientation

Citation

DeLongchamp, D. , Kline, R. , Jung, Y. , Germack, D. , Lin, E. , Moad, A. , Richter, L. , Toney, M. , Heeney, M. and McCulloch, I. (2009), Controlling the Formation and Orientation of Terraced Nanoscale Ribbons of a Thiophene-Based Copolymer, ACS Nano, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=854094 (Accessed November 18, 2024)