Spatially Ordered Poly(3-hexylthiophene) Fibril Nanostructures via Controlled Evaporative Self-Assembly

Woon Ik Park, Dong Hyun Kim, Jaehan Jung, Suck Won Hong, Zhiqun Lin, Myunghwan Byun

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11 Scopus citations


Hierarchically structured, gradient concentric rings of regioregular conjugated polymer, rr-poly(3-hexylthiophene) (rr-P3HT) with randomly or directionally crystallized nanofibrils over large areas are obtained by regulating consecutive “stick-slip” motions of the three-phase contact line in a confined geometry consisting of an upper curved sphere surface and a lower flat Si substrate (i.e., sphere-on-flat geometry), which leads to an axially symmetric capillary-bridge (bound solution). Self-organized concentric P3HT ring patterns result from mediating intermolecular interactions between the polymer molecules, and varying the solvent concentration. More interestingly, from the lower solution concentration “shish-kebab” like morphologies are observed in between adjacent rings. These unusual, directionally crystallized structures are formed spontaneously parallel to the moving direction of the contact line on solvent evaporation. Subsequently, I–V characteristics of the directionally crystallized and randomly distributed P3HT nanofibrils formed across the electrodes are investigated and compared.

Original languageEnglish
Article number1800554
JournalAdvanced Materials Technologies
Issue number1
StatePublished - Jan 2019

Bibliographical note

Funding Information:
W.I.P and D.-H.K contributed equally to this work. Z.L. and M.B. conceived the experiments. W.I.P., D.H.K., and M.B. performed the whole experiments. All authors contributed to the discussion and to the writing of the paper. This research was supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Science, ICT, and Future Planning (NRF-2015R1C1A1A01053111). This article is part of the special series on Advanced Intelligent Systems that showcases the outstanding achievements of leading international researchers on intelligent systems.

Publisher Copyright:
© 2018 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim


  • controlled evaporative self-assembly
  • gradient concentric rings
  • regioregular conjugated polymer
  • sphere-on-flat geometry
  • stick-slip


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