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Dynamic assembly of liquid crystalline graphene oxide gel fibers for ion transport

Title
Dynamic assembly of liquid crystalline graphene oxide gel fibers for ion transport
Author
한태희
Keywords
ORIENTATION; MORPHOLOGY; EXTRUSION; STRENGTH; CHANNELS; NETWORK; POLYMER; WATER
Issue Date
2018-11
Publisher
AMER ASSOC ADVANCEMENT SCIENCE
Citation
SCIENCE ADVANCES, v. 4, no. 11, Article no. eaau2104
Abstract
Colloidal dispersions with liquid crystallinity hold great promise for fabricating their superstructures. As an example, when graphene oxide (GO) sheets are assembled in the liquid crystalline state, they can turn into ordered macroscopic forms of GO such as fibers via the wet spinning process. Here, we report that by reinforcing inter-sheet interactions, GO liquid crystals (LCs) turn into mechanically robust hydrogels that can be readily drawn into highly aligned fibrillar structures. GO hydrogel fibers with highly aligned sheets (orientation factor, f = 0.71) exhibit more than twice the ionic conductivity compared to those with partially aligned structures (f = 0.01). The hierarchically interconnected two-dimensional nanochannels within these neatly aligned GOLC hydrogel fibers may facilitate controlled transport of charge carriers and could be potentially explored as cables for interconnecting biosystems and/or human-made devices.
URI
https://advances.sciencemag.org/content/4/11/eaau2104http://repository.hanyang.ac.kr/handle/20.500.11754/120673
ISSN
2375-2548
DOI
10.1126/sciadv.aau2104
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > ORGANIC AND NANO ENGINEERING(유기나노공학과) > Articles
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