Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/34807
Title: Energy-level structure of nitrogen-doped graphene quantum dots
Authors: Tang, L
Ji, R
Li, X
Teng, KS
Lau, SP 
Issue Date: 2013
Publisher: Royal Society of Chemistry
Source: Journal of materials chemistry C, 2013, v. 1, no. 32, p. 4908-4915 How to cite?
Journal: Journal of materials chemistry C
Abstract: The doping of carbon-based materials is of great importance due to its ability to modulate their optical, electrical and optoelectronic properties. Nitrogen-doped graphene quantum dots (N-GQDs) have received significant attention due to their superior electrocatalytic activity, optical properties and biocompatibility. The energy-level structure of N-GQDs remains unknown, which hinders the development of N-GQDs for various applications. Here, we report a one-pot synthesis method to prepare large-quantity N-GQDs at room temperature and atmospheric pressure under a prolonged reaction time. Using this approach, we can effectively dope N into the N-GQDs. As revealed by electron energy loss spectroscopy, N-doping introduces a new energy level into the electronic structure, which is responsible for tuning the optical properties of the N-GQDs.
URI: http://hdl.handle.net/10397/34807
ISSN: 2050-7534 (electronic)
DOI: 10.1039/C3TC30877D
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