Jump to main content
Jump to site search
PLANNED MAINTENANCE Close the message box

Scheduled maintenance work on Wednesday 27th March 2019 from 11:00 AM to 1:00 PM (GMT).

During this time our website performance may be temporarily affected. We apologise for any inconvenience this might cause and thank you for your patience.


Issue 34, 2014
Previous Article Next Article

Revealing the tunable photoluminescence properties of graphene quantum dots

Author affiliations

Abstract

Graphene quantum dots (GQDs) are a new class of fluorescent reporters promising various novel applications such as bio-imaging, optical sensing and photovoltaics. They have recently attracted enormous interest because of their extraordinary and tunable optical, electrical, chemical and structural properties. However, the widespread use of GQDs is hindered by the poor understanding of their photoluminescence (PL) mechanisms. Using density-functional theory (DFT) and time-dependent DFT calculations, we reveal that the PL of a GQD can be sensitively tuned by its size, edge configuration, shape, attached chemical functionalities, heteroatom doping and defects. In addition, it is discovered that the PL of a large GQD consisting of heterogeneously hybridized carbon network is essentially determined by the embedded small sp2 clusters isolated by sp3 carbons. This study not only provides an explanation to the previous experimental observations but also provides insightful guidance to develop methods for the controllable synthesis and engineering of GQDs.

Graphical abstract: Revealing the tunable photoluminescence properties of graphene quantum dots

Back to tab navigation

Supplementary files

Publication details

The article was received on 06 Jun 2014, accepted on 02 Jul 2014 and first published on 02 Jul 2014


Article type: Communication
DOI: 10.1039/C4TC01191K
Author version
available:
Download author version (PDF)
Citation: J. Mater. Chem. C, 2014,2, 6954-6960

  •   Request permissions

    Revealing the tunable photoluminescence properties of graphene quantum dots

    M. A. Sk, A. Ananthanarayanan, L. Huang, K. H. Lim and P. Chen, J. Mater. Chem. C, 2014, 2, 6954
    DOI: 10.1039/C4TC01191K

Search articles by author

Spotlight

Advertisements