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Growth of Long Triisopropylsilylethynyl Pentacene (TIPS‐PEN) Nanofibrils in a Polymer Thin Film During Spin‐Coating
Author(s) -
Park Minwoo,
Min Yuho,
Lee YuJeong,
Jeong Unyong
Publication year - 2014
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/marc.201300837
Subject(s) - materials science , pentacene , spin coating , thin film , polymer , coating , layer (electronics) , composite material , thin film transistor , nanotechnology , chemical engineering , engineering
This study demonstrates the growth of long triisopropylsilyethynyl pentacene (TIPS‐PEN) nanofibrils in a thin film of a crystalline polymer, poly(ε‐caprolactone) (PCL). During spin‐coating, TIPS‐PEN molecules are locally extracted around the PCL grain boundaries and they crystallize into [010] direction forming long nanofibrils. Molecular weight of PCL and weight fraction (α) of TIPS‐PEN in PCL matrix are key factors to the growth of nanofibrils. Long high‐quality TIPS‐PEN nanofibrils are obtained with high‐molecular‐weight PCL and at the α values in the range of 0.03–0.1. The long nanofibrils are used as an active layer in a field‐effect organic transistor.