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Graphene quantum dots from chemistry to applications

P. Tian, L. Tang, K.S. Teng, S.P. Lau, Vincent Teng Orcid Logo

Materials Today Chemistry, Volume: 10, Pages: 221 - 258

Swansea University Author: Vincent Teng Orcid Logo

Abstract

Graphene quantum dots (GQDs) have been widely studied in recent years due to its unique structure-related properties, such as optical, electrical and optoelectrical properties. GQDs are considered new kind of quantum dots (QDs), as they are chemically and physically stable because of its intrinsic i...

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Published in: Materials Today Chemistry
ISSN: 2468-5194
Published: 2018
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URI: https://cronfa.swan.ac.uk/Record/cronfa44655
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first_indexed 2018-09-28T19:06:52Z
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spelling 2018-11-19T16:39:37.1116934 v2 44655 2018-09-28 Graphene quantum dots from chemistry to applications 98f529f56798da1ba3e6e93d2817c114 0000-0003-4325-8573 Vincent Teng Vincent Teng true false 2018-09-28 EEEG Graphene quantum dots (GQDs) have been widely studied in recent years due to its unique structure-related properties, such as optical, electrical and optoelectrical properties. GQDs are considered new kind of quantum dots (QDs), as they are chemically and physically stable because of its intrinsic inert carbon property. Furthermore, GQDs are environmentally friendly due to its non-toxic and biologically inert properties, which have attracted worldwide interests from academic and industry. In this review, a number of GQDs preparation methods, such as hydrothermal method, microwave-assisted hydrothermal method, soft-template method, liquid exfoliation method, metal-catalyzed method and electron beam lithography method etc., are summarized. Their structural, morphological, chemical composition, optical, electrical and optoelectrical properties have been characterized and studied. A variety of elemental dopant, such as nitrogen, sulphur, chlorine, fluorine and potassium etc., have been doped into GQDs to diversify the functions of the material. The control of its size and shape has been realized by means of preparation parameters, such as synthesis temperature, growth time, source concentration and catalyst etc. As far as energy level engineering is concerned, the elemental doping has shown an introduction of energy level in GQDs which may tune the optical, electrical and optoelectrical properties of the GQDs. The applications of GQDs in biological imaging, optoelectrical detectors, solar cells, light emitting diodes, fluorescent agent, photocatalysis, and lithium ion battery are described. GQD composites, having optimized contents and properties, are also discussed to extend the applications of GQDs. Basic physical and chemical parameters of GQDs are summarized by tables in this review, which will provide readers useful information. Journal Article Materials Today Chemistry 10 221 258 2468-5194 Nanostructured graphene, Graphene quantum dots, Optical properties, Electrical properties, Optoelectronics 31 12 2018 2018-12-31 10.1016/j.mtchem.2018.09.007 COLLEGE NANME Electronic and Electrical Engineering COLLEGE CODE EEEG Swansea University 2018-11-19T16:39:37.1116934 2018-09-28T17:29:06.3566636 Faculty of Science and Engineering School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Electronic and Electrical Engineering P. Tian 1 L. Tang 2 K.S. Teng 3 S.P. Lau 4 Vincent Teng 0000-0003-4325-8573 5 0044655-09112018110554.pdf tian2018(2).pdf 2018-11-09T11:05:54.9200000 Output 18155189 application/pdf Version of Record true 2018-11-09T00:00:00.0000000 true eng
title Graphene quantum dots from chemistry to applications
spellingShingle Graphene quantum dots from chemistry to applications
Vincent Teng
title_short Graphene quantum dots from chemistry to applications
title_full Graphene quantum dots from chemistry to applications
title_fullStr Graphene quantum dots from chemistry to applications
title_full_unstemmed Graphene quantum dots from chemistry to applications
title_sort Graphene quantum dots from chemistry to applications
author_id_str_mv 98f529f56798da1ba3e6e93d2817c114
author_id_fullname_str_mv 98f529f56798da1ba3e6e93d2817c114_***_Vincent Teng
author Vincent Teng
author2 P. Tian
L. Tang
K.S. Teng
S.P. Lau
Vincent Teng
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publishDate 2018
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description Graphene quantum dots (GQDs) have been widely studied in recent years due to its unique structure-related properties, such as optical, electrical and optoelectrical properties. GQDs are considered new kind of quantum dots (QDs), as they are chemically and physically stable because of its intrinsic inert carbon property. Furthermore, GQDs are environmentally friendly due to its non-toxic and biologically inert properties, which have attracted worldwide interests from academic and industry. In this review, a number of GQDs preparation methods, such as hydrothermal method, microwave-assisted hydrothermal method, soft-template method, liquid exfoliation method, metal-catalyzed method and electron beam lithography method etc., are summarized. Their structural, morphological, chemical composition, optical, electrical and optoelectrical properties have been characterized and studied. A variety of elemental dopant, such as nitrogen, sulphur, chlorine, fluorine and potassium etc., have been doped into GQDs to diversify the functions of the material. The control of its size and shape has been realized by means of preparation parameters, such as synthesis temperature, growth time, source concentration and catalyst etc. As far as energy level engineering is concerned, the elemental doping has shown an introduction of energy level in GQDs which may tune the optical, electrical and optoelectrical properties of the GQDs. The applications of GQDs in biological imaging, optoelectrical detectors, solar cells, light emitting diodes, fluorescent agent, photocatalysis, and lithium ion battery are described. GQD composites, having optimized contents and properties, are also discussed to extend the applications of GQDs. Basic physical and chemical parameters of GQDs are summarized by tables in this review, which will provide readers useful information.
published_date 2018-12-31T03:55:58Z
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