Hossain, Muhammad Mohsin Park, Ok-Kyung Hahn, Jae Ryang Ku, Bon-Cheol 2024-01-20T09:34:52Z 2024-01-20T09:34:52Z 2021-09-05 2014-05-15 0167-577X https://pubs.kist.re.kr/handle/201004/126785 We developed an efficient method for exfoliating pristine graphite in an organic solvent to produce a high yield (14%) and high concentration (5.25 mg/mL) of well-dispersed mono-, bi-, and multi-layered graphene sheets. Pre-thermal activation of pristine graphite at 900 degrees C in a sealed stainless steel bath under high pressure, followed by sonication in a solvent of 1-methyl-2-pyrrolidinone at elevated temperatures produced a solution of homogeneous, well-dispersed, defect-free, and non-oxidized graphene. The resulting electrical conductivities of the graphene sheets were high, up to 849 S/cm. (c) 2014 Elsevier B.V. All rights reserved. English ELSEVIER LIQUID-PHASE EXFOLIATION DISPERSIONS High yield and high concentration few-layer graphene sheets using solvent exfoliation of graphite with pre-thermal treatment in a sealed bath Article 10.1016/j.matlet.2014.03.024 1 MATERIALS LETTERS, v.123, pp.90 - 92 MATERIALS LETTERS 123 90 92 scie scopus 000335706300024 2-s2.0-84896479072 Materials Science, Multidisciplinary Physics, Applied Materials Science Physics Article LIQUID-PHASE EXFOLIATION DISPERSIONS Carbon material High dispersion Thermal activation Mechanical exfoliation Raman Graphene sheet