Solvothermal tuning of photoluminescent graphene quantum dots: from preparation to photoluminescence mechanism

Solvothermal synthesis was employed to tune the surface states of graphene quantum dots (GQDs). Two series of GQDs with the particle sizes from 2.6 to 4.5 nm were prepared as follows: (I) GQDs with the same size but different oxygen degrees; (II) GQDs with different core sizes but the similar surfac...

Full description

Saved in:
Bibliographic Details
Published inJournal of nanoparticle research : an interdisciplinary forum for nanoscale science and technology Vol. 20; no. 2; pp. 1 - 9
Main Authors Qi, Bao-Ping, Zhang, Xiaoru, Shang, Bing-Bing, Xiang, Dongshan, Zhang, Shenghui
Format Journal Article
LanguageEnglish
Published Dordrecht Springer Netherlands 01.02.2018
Springer Nature B.V
Subjects
Characterization and Evaluation of Materials
Chemistry and Materials Science
Electrochemiluminescence
Graphene
Inorganic Chemistry
Lasers
Luminescence
Materials Science
Nanoparticles
Nanotechnology
Optical Devices
Optics
Oxidation
Photoluminescence
Photonics
Photons
Physical Chemistry
Quantum dots
Red shift
Research Paper
Surface chemistry
Quantum confinement
Electrochemiluminescence
Graphene quantum dot
Surface chemistry
Photoluminescence
Online AccessGet full text

Cover

More Information
Summary:Solvothermal synthesis was employed to tune the surface states of graphene quantum dots (GQDs). Two series of GQDs with the particle sizes from 2.6 to 4.5 nm were prepared as follows: (I) GQDs with the same size but different oxygen degrees; (II) GQDs with different core sizes but the similar surface chemistry. Both the large sizes and the high surface oxidation degrees led to the redshift photoluminescence (PL) of GQDs. Electrochemiluminescence (ECL) spectra from two series of GQDs were all in accordance with their PL spectra, respectively, which provided good evidence for the conjugated structures in GQDs responsible for PL. Graphical abstract ᅟ
ISSN:1388-0764
1572-896X
DOI:10.1007/s11051-018-4123-8