Kang, Sukhyun, Jung, Kyung Hwan, Mhin, Sungwook, Son, Yong, Lee, Kangpyo, Kim, Won Rae, Choi, Heechae, Ryu, Jeong Ho, Han, Hyuksu and Kim, Kang Min ORCID: 0000-0002-0403-2224 (2020). Fundamental Understanding of the Formation Mechanism for Graphene Quantum Dots Fabricated by Pulsed Laser Fragmentation in Liquid: Experimental and Theoretical Insight. Small, 16 (38). WEINHEIM: WILEY-V C H VERLAG GMBH. ISSN 1613-6829

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Abstract

The pulsed laser fragmentation in liquid (PLFL) process is a promising technique for the synthesis of carbon-based functional materials. In particular, there has been considerable attention on graphene quantum dots (GQDs) derived from multiwalled carbon nanotubes (MWCNTs) by the PLFL process, owing to the low cost and rapid processing time involved. However, a fundamental deep understanding of the formation of GQDs from MWCNTs by PLFL has still not been achieved despite the high demand. In this work, a mechanism for the formation of GQDs from MWCNTs by the PLFL process is reported, through the combination of experimental and theoretical studies. Both the experimental and computational results demonstrate that the formation of GQDs strongly depends on the pulse laser energy. Both methods demonstrate that the critical energy point, where a plasma plume is generated on the surface of the MWCNTs, should be precisely maintained to produce GQDs; otherwise, an amorphous carbon structure is favorably formed from the scattered carbons.

Item Type: Journal Article
Creators:
CreatorsEmailORCIDORCID Put Code
Kang, SukhyunUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Jung, Kyung HwanUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Mhin, SungwookUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Son, YongUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Lee, KangpyoUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Kim, Won RaeUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Choi, HeechaeUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Ryu, Jeong HoUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Han, HyuksuUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Kim, Kang MinUNSPECIFIEDorcid.org/0000-0002-0403-2224UNSPECIFIED
URN: urn:nbn:de:hbz:38-322798
DOI: 10.1002/smll.202003538
Journal or Publication Title: Small
Volume: 16
Number: 38
Date: 2020
Publisher: WILEY-V C H VERLAG GMBH
Place of Publication: WEINHEIM
ISSN: 1613-6829
Language: English
Faculty: Unspecified
Divisions: Unspecified
Subjects: no entry
Uncontrolled Keywords:
KeywordsLanguage
GENERALIZED GRADIENT APPROXIMATION; MOLECULAR-DYNAMICS; CARBON NANOTUBES; ABLATION; NANOMATERIALS; ETHANOL; ORIGIN; FIELD; OXIDE; BLUEMultiple languages
Chemistry, Multidisciplinary; Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Physics, Applied; Physics, Condensed MatterMultiple languages
URI: http://kups.ub.uni-koeln.de/id/eprint/32279

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