Water Processable Polythiophene Nanowires by Photo-Cross-Linking and Click-Functionalization.
Replacing or minimizing the use of halogenated organic solvents in the processing and manufacturing of conjugated polymer-based organic electronics has emerged as an important issue due to concerns regarding toxicity, environmental impact, and high cost. To date, however, the processing of well-ordered conjugated polymer nanostructures has been difficult to achieve using environmentally benign solvents. In this work, we report the development of water and alcohol processable nanowires (NWs) with well-defined crystalline nanostructure based on the solution assembly of azide functionalized poly(3-hexylthiophene) (P3HT-azide) and subsequent photo-cross-linking and functionalization of these NWs. The solution-assembled P3HT-azide NWs were successfully cross-linked by exposure to UV light, yielding good thermal and chemical stability. Residual azide units on the photo-cross-linked NWs were then functionalized with alkyne terminated polyethylene glycol (PEG-alkyne) using copper catalyzed azide-alkyne cycloaddition chemistry. PEG functionalization of the cross-linked P3HT-azide NWs allowed for stable dispersion in alcohols and water, while maintaining well-ordered NW structures with electronic properties suitable for the fabrication of organic field effect transistors (OFETs).
Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology (KAIST) , Daejeon, 305-701, Korea.|Department of Polymer Science and Engineering, University of Massachusetts , Amherst, Massachusetts 01003, United States.
Hyeong Jun
HJ
Kim
Department of Polymer Science and Engineering, University of Massachusetts , Amherst, Massachusetts 01003, United States.
Matthew
M
Skinner
Department of Chemical Engineering, Pohang University of Science and Technology , Pohang, Gyeongbuk 790-784, South Korea.|School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST) , Ulsan 689-798, South Korea.
Hojeong
H
Yu
Department of Chemical Engineering, Pohang University of Science and Technology , Pohang, Gyeongbuk 790-784, South Korea.
Joon Hak
JH
Oh
Department of Polymer Science and Engineering, University of Massachusetts , Amherst, Massachusetts 01003, United States.
Alejandro L
AL
Briseno
Department of Polymer Science and Engineering, University of Massachusetts , Amherst, Massachusetts 01003, United States.
Todd
T
Emrick
Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology (KAIST) , Daejeon, 305-701, Korea.
Bumjoon J
BJ
Kim
Department of Polymer Science and Engineering, University of Massachusetts , Amherst, Massachusetts 01003, United States.
Ryan C
RC
Hayward
Solution-assembled nanowires; click-functionalization; photo-cross-linking; water processable organic electronics