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Ultrafast Method for Selective Design of Graphene Quantum Dots with Highly Efficient Blue Emission

Title
Ultrafast Method for Selective Design of Graphene Quantum Dots with Highly Efficient Blue Emission
Author
심광보
Keywords
LASER-ABLATION; OXIDE; MONOLAYER; FLUORESCENCE; GRAPHITE; ROUTE; SIZE
Issue Date
2016-12
Publisher
NATURE PUBLISHING GROUP
Citation
SCIENTIFIC REPORTS, v. 6, No. 38423
Abstract
Graphene quantum dots (GQDs) have attractive properties and potential applications. However, their various applications are limited by a current synthetic method which requires long processing time. Here, we report a facile and remarkably rapid method for production of GQDs exhibiting excellent optoelectronic properties. We employed the pulsed laser ablation (PLA) technique to exfoliate GQDs from multi-wall carbon nanotube (MWCNTs), which can be referred to as a pulsed laser exfoliation (PLE) process. Strikingly, it takes only 6 min to transform all MWCNTs precursors to GQDs by using PLE process. Furthermore, we could selectively produce either GQDs or graphene oxide quantum dots (GOQDs) by simply changing the organic solvents utilized in the PLE processing. The synthesized GQDs show distinct blue photoluminescence (PL) with excellent quantum yield (QY) up to 12% as well as sufficient brightness and resolution to be suitable for optoelectronic applications. We believe that the PLE process proposed in this work will further open up new routes for the preparation of different optoelectronic nanomaterials.
URI
https://www.nature.com/articles/srep38423https://repository.hanyang.ac.kr/handle/20.500.11754/101835
ISSN
2045-2322
DOI
10.1038/srep38423
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > MATERIALS SCIENCE AND ENGINEERING(신소재공학부) > Articles
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