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Ruoff, Rodney S.
Center for Multidimensional Carbon Materials (CMCM)
Research Interests
  • Next generation carbons, ultrathin sp3-bonded carbon sheets, negative curvature (‘Schwartzites’) carbons, sp3/sp2 hybrid carbon materials, model compounds for novel carbon materials, reaction mechanisms

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Graphene oxide aerogel 'ink' at room temperature, and ordered structures by freeze casting

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dc.contributor.author Wang, Chunhui ko
dc.contributor.author Huang, Ming ko
dc.contributor.author Ruoff, Rodney S. ko
dc.date.available 2021-12-24T00:43:50Z -
dc.date.created 2021-11-12 ko
dc.date.issued 2021-10 ko
dc.identifier.citation CARBON, v.183, pp.620 - 627 ko
dc.identifier.issn 0008-6223 ko
dc.identifier.uri https://scholarworks.unist.ac.kr/handle/201301/55353 -
dc.description.abstract A simple 'drop-by-drop' deposition method was invented to make graphene oxide (G-O) hydrogels at room temperature. Graphite oxide was synthesized at 5 degrees C for a low defect density in the carbon lattice, and was then dispersed in water to form "G-O(5)". This water dispersion was converted into a G-O(5) ink by adding L-ascorbic acid and the ink could then be deposited onto any substrate to prepare hydrogels using a dropper; using this gelation method, a stable hydrogel is formed within 1 hour at room temperature, without heating or high pressure. Hydrogels with desired patterns and sizes were readily deposited on various substrates. This method provides efficient control over the hydrogel and it was readily made into forms such as films, fibers, and aerogels. Freeze casting the hydrogel caused the G-O(5) sheets to assemble into a long-range lamellar structure, by controlling the growth pattern of the ice crystals that formed the lamellae when the hydrogel was frozen. The deposition of this G-O(5) ink at room temperature allows straightforward fabrication of G-O aerogels with ordered structures. (C) 2021 Elsevier Ltd. All rights reserved. ko
dc.language 영어 ko
dc.publisher PERGAMON-ELSEVIER SCIENCE LTD ko
dc.title Graphene oxide aerogel 'ink' at room temperature, and ordered structures by freeze casting ko
dc.type ARTICLE ko
dc.identifier.scopusid 2-s2.0-85111094670 ko
dc.identifier.wosid 000705083800058 ko
dc.type.rims ART ko
dc.identifier.doi 10.1016/j.carbon.2021.07.046 ko
dc.identifier.url https://www.sciencedirect.com/science/article/pii/S0008622321007247?via%3Dihub ko
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