Han, Joong Tark Jang, Jeong In Kim, Haena Hwang, Jun Yeon Yoo, Hyung Keun Woo, Jong Seok Choi, Sua Kim, Ho Young Jeong, Hee Jin Jeong, Seung Yol Baeg, Kang-Jun Cho, Kilwon Lee, Geon-Woong 2024-01-20T09:34:40Z 2024-01-20T09:34:40Z 2021-09-05 2014-05-30 2045-2322 https://pubs.kist.re.kr/handle/201004/126774 Layered materials must be exfoliated and dispersed in solvents for diverse applications. Usually, highly energetic probe sonication may be considered to be an unfavourable method for the less defective exfoliation and dispersion of layered materials. Here we show that judicious use of ultrasonic cavitation can produce exfoliated transition metal dichalcogenide nanosheets extraordinarily dispersed in non-toxic solvent by minimising the sonolysis of solvent molecules. Our method can also lead to produce less defective, large graphene oxide nanosheets from graphite oxide in a short time (within 10 min), which show high electrical conductivity (>20,000 S m(-1)) of the printed film. This was achieved by adjusting the ultrasonic probe depth to the liquid surface to generate less energetic cavitation (delivered power similar to 6 W), while maintaining sufficient acoustic shearing (0.73 m s(-1)) and generating additional microbubbling by aeration at the liquid surface. English NATURE PUBLISHING GROUP GRAPHENE Extremely Efficient Liquid Exfoliation and Dispersion of Layered Materials by Unusual Acoustic Cavitation Article 10.1038/srep05133 1 SCIENTIFIC REPORTS, v.4 SCIENTIFIC REPORTS 4 scie scopus 000336529300005 2-s2.0-84901814466 Multidisciplinary Sciences Science & Technology - Other Topics Article GRAPHENE Two-dimensional materials chemical physics Exfoliation TEM Electronic properties and materials