Issue 24, 2019, Issue in Progress
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RSC Advances

Laser wavelength modulated pulsed laser ablation for selective and efficient production of graphene quantum dots†

Sukhyun Kang,‡ab   Jeong Ho Ryu,‡c   Byoungsoo Lee,a   Kyung Hwan Jung,a   Kwang Bo Shim,b   Hyuksu Han ORCID logo *ad  and  Kang Min Kim*a  

* Corresponding authors

a Korea Institute of Industrial Technology, Gwahakdanji-ro 137-41, Gangwon-do, Republic of Korea
E-mail: kmkim@kitech.re.kr

b Department of Materials Science and Engineering, Hanyang University, 17 Haengdang-dong, Seongdong-gu, Seoul 133-791, Republic of Korea

c Department of Materials Science and Engineering, Korea National University of Transportation, 50 Daehak-ro, Chungju-si, Chungbuk 380-702, Republic of Korea

d Department of Materials Science and Engineering, Hongik University, Sejong-ro 2639, Sejong, Republic of Korea
E-mail: hhan@hongik.ac.kr

Abstract

Graphene quantum dots (GQDs) and graphene oxide quantum dots (GOQDs) can be used in different applications such as optoelectronic and biomedical applications, respectively. Hence, the selective synthesis of GQDs and GOQDs is highly desirable but challenging. Here, we present GQDs and GOQDs selectively prepared by an easy and simple pulsed laser ablation in liquid (PLAL) method by controlling the laser wavelength. The obtained GQDs and GOQDs showed a significantly different optoelectronic nature mainly due to the existence of surface oxygen-rich functional groups (e.g. carboxyl or hydroxy groups). Also, we described a possible mechanism for the formation of oxygen functional groups during the PLAL process based on the Coulomb explosion model, which can give further insight for designing functional carbon materials.

Graphical abstract: Laser wavelength modulated pulsed laser ablation for selective and efficient production of graphene quantum dots

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Article information

DOI
https://doi.org/10.1039/C9RA02087J
Article type
Paper
Submitted
18 Mar 2019
Accepted
27 Apr 2019
First published
03 May 2019
This article is Open Access
Creative Commons BY-NC license

RSC Adv., 2019,9, 13658-13663

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Laser wavelength modulated pulsed laser ablation for selective and efficient production of graphene quantum dots

S. Kang, J. H. Ryu, B. Lee, K. H. Jung, K. B. Shim, H. Han and K. M. Kim, RSC Adv., 2019, 9, 13658 DOI: 10.1039/C9RA02087J

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