Flow-induced Alignment of Disk-like Graphene Oxide Particles in Isotropic and Biphasic Colloids
- Authors
- Hong S.-H.[Hong S.-H.]; Shen T.-Z.[Shen T.-Z.]; Song J.-K.[Song J.-K.]
- Issue Date
- 2015
- Keywords
- Graphene oxide; colloid; liquid crystal; flow-induced ordering
- Citation
- Molecular Crystals and Liquid Crystals, v.610, no.1, pp.68 - 76
- Journal Title
- Molecular Crystals and Liquid Crystals
- Volume
- 610
- Number
- 1
- Start Page
- 68
- End Page
- 76
- URI
- https://scholarworks.bwise.kr/skku/handle/2021.sw.skku/47522
- DOI
- 10.1080/15421406.2015.1025208
- Abstract
- The flow-induced ordering of Graphene oxide (GO) particles was investigated in a tube flow of aqueous GO dispersions with varying GO concentrations. By measuring the average effective birefringence for the samples in a tube flow, we could quantitatively deduce the order parameter of GO particles. The flow-induced effective birefringence linearly increased as the GO concentration increased in isotropic phase, but the birefringence deviated from the linear tendency and increased more in biphase. We also calculated the S and P order parameters using the optical birefringence profile in the tube flow. The result showed that the S order parameter kept increasing as the GO concentration increased but the P order parameter decreased as the GO concentration increased. All these results indicate that the increase in inter-particle ordering interaction in biphase enhances the uniaxial S order parameter in the flow-induced ordering and suppresses the biased biaxial ordering. © 2015 Copyright Taylor & Francis Group, LLC.
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Collections - Information and Communication Engineering > School of Electronic and Electrical Engineering > 1. Journal Articles
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