title: Ultrafast Method for Selective Design of Graphene Quantum Dots with Highly Efficient Blue Emission.
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.
authors.affiliation: Department of Materials Science and Engineering, Hanyang University, 222 Wangsimri-ro, Seongdonggu, Seoul, 04763, Korea.
authors.forename: Suk Hyun
authors.initials: SH
authors.lastname: Kang
authors.affiliation: Korea Institute of Industrial Technology, 113-58, Seohaean-ro, Siheung-si, Gyeonggi-do, 15014, Republic of Korea.
authors.forename: Sungwook
authors.initials: S
authors.lastname: Mhin
authors.affiliation: Korea Institute of Industrial Technology, Gwahakdanji-ro 137-41, Gangwond-do, 25440, Republic of Korea.
authors.forename: Hyuksu
authors.initials: H
authors.lastname: Han
authors.affiliation: Korea Institute of Industrial Technology, Gwahakdanji-ro 137-41, Gangwond-do, 25440, Republic of Korea.
authors.forename: Kang Min
authors.initials: KM
authors.lastname: Kim
authors.affiliation: Department of Materials Science and Engineering, North Carolina State University, Raleigh, NC 27695, USA.
authors.forename: Jacob L
authors.initials: JL
authors.lastname: Jones
authors.affiliation: Department of Materials Science and Engineering, Korea National University of Transportation, Chungbuk, 27469, Republic of Korea.
authors.forename: Jeong Ho
authors.initials: JH
authors.lastname: Ryu
authors.affiliation: Department of Pharmacology &Clinical Pharmacology Lab, College of Medicine, Hanyang University, 222 Wangsimri-ro, Seongdonggu, Seoul, 04763, Korea.
authors.forename: Ju Seop
authors.initials: JS
authors.lastname: Kang
authors.affiliation: Department of Pharmacology &Clinical Pharmacology Lab, College of Medicine, Hanyang University, 222 Wangsimri-ro, Seongdonggu, Seoul, 04763, Korea.
authors.forename: Shin Hee
authors.initials: SH
authors.lastname: Kim
authors.affiliation: Department of Materials Science and Engineering, Hanyang University, 222 Wangsimri-ro, Seongdonggu, Seoul, 04763, Korea.
authors.forename: Kwang Bo
authors.initials: KB
authors.lastname: Shim