New Route to Carbon Dots

  • Author: Rachel McGlue
  • Published Date: 16 March 2013
  • Source / Publisher: Chemistry – A European Journal/Wiley-VCH
  • Copyright: Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim
thumbnail image: New Route to Carbon Dots

Related Societies

Carbon dots (Cdots) have attracted considerable attention because they are an important probe for imaging and sensing applications. This is due to their fluorescence properties, good biocompatibility, and low toxicity, which are advantages over heavy-metal-based quantum dots and the dye-based fluorescence probes used for imaging and sensing.

Cdots consist of carbon, hydrogen, and oxygen with a quasi-spherical structure in which the carbon shows the character of crystalline graphite. Unfortunately, complex procedures and strong acid treatment are often required for the formation of Cdots. Although Cdots suffer from low photoluminescence (PL) emission, heteroatom doping enhances their emission by inducing an upward shift of the Fermi level and electrons in the conduction band.

Xue-Bo Yin and co-workers, Nankai University, China, propose a facile and general carbonization and extraction procedure to prepare a series of N-doped Cdots (N-Cdots) with different nitrogen contents, a low oxidation level, and multicolor emission. The intensities of the multicolor emission from the N-Cdots were confirmed to be nitrogen-content-dependent, whereas the emission-peak wavelength was Cdot-size-dependent. Furthermore, multicolor photoluminescence was confirmed in living cell systems.

Because this synthetic method allows Cdots with various nitrogen contents to be prepared by using different precursors, these results suggest the possibility of preparing doped Cdots with special and tunable PL properties.

Article Views: 3872

Sign in Area

Please sign in below

Additional Sign In options

Please note that to comment on an article you must be registered and logged in.
Registration is for free, you may already be registered to receive, e.g., the newsletter. When you register on this website, please ensure you view our terms and conditions. All comments are subject to moderation.

Article Comments - To add a comment please sign in


chen cheng wrote:

Chemiluminescence of carbon dots under strong alkaline solutions

a novel insight into carbon dot optical properties

Fri Apr 19 07:55:37 UTC 2013

If you would like to reuse any content, in print or online, from, please contact us first for permission and consult our permission guidance prior to making your request

Follow on Facebook Follow on Twitter Follow on YouTube Follow on LinkedIn Follow on Instagram RSS Sign up for newsletters

Magazine of Chemistry Europe (16 European Chemical Societies) published by Wiley-VCH