Featured Research

from universities, journals, and other organizations

Brighter future for carbon dots

Date:
September 13, 2012
Source:
National Institute for Materials Science
Summary:
Researchers have produced water-soluble carbon dots that selectively emit light across the entire visible range without any surface coating. The properties of these new C-dots make them ideal for a variety of bioimaging applications and for medical diagnostics.

Typical transmission electron microscopy (TEM) images of Carbon dots.
Credit: IOP / STAM

Work led by Amita Pathak at the Indian Institute of Technology has produced water-soluble C-dots that selectively emit light across the entire visible range without any surface coating. The properties of these new C-dots make them ideal for a variety of bioimaging applications and for medical diagnostics.

Related Articles


Carbon dots (C-dots) are light-emitting (luminescent) nanoparticles that can be used to track biological processes inside cells. They are less toxic than similar alternatives, making them more suitable for use in live biological systems, but the light-emitting properties of those currently made are not ideal.

A variety of approaches have been used to make C-dots, but most require coating of the particles with other molecules to achieve useful luminescence. Now, work led by Amita Pathak at the Indian Institute of Technology has produced water-soluble C-dots that selectively emit light across the entire visible range without any surface coating.

The researchers produced these C-dots by breaking down the carbohydrate dextrin with microwaves. The resulting C-dots emitted different colours of light when excited by specific wavelengths, even without coating them. Exactly how this multi-coloured luminescence arises is unclear, but it allows precise control of the light emission that can be tailored to specific needs.

To ensure that the C-dots were not toxic, the team added different concentrations of the nanoparticles to cultured cells. After three days, they determined how many cells had survived. Increasing concentrations of C-dots made little difference to cell survival, showing that the C-dots are not toxic and could therefore be used in live tissue.

The properties of these new C-dots make them ideal for a variety of bioimaging applications and for medical diagnostics. The same researchers have already begun to look at how they may be used to investigate interactions between drugs and cells.


Story Source:

The above story is based on materials provided by National Institute for Materials Science. The original article was written by Ian Fyfe. Note: Materials may be edited for content and length.


Journal Reference:

  1. Nagaprasad Puvvada, B N Prashanth Kumar, Suraj Konar, Himani Kalita, Mahitosh Mandal, Amita Pathak. Synthesis of biocompatible multicolor luminescent carbon dots for bioimaging applications. Science and Technology of Advanced Materials, 2012; 13 (4): 045008 DOI: 10.1088/1468-6996/13/4/045008

Cite This Page:

National Institute for Materials Science. "Brighter future for carbon dots." ScienceDaily. ScienceDaily, 13 September 2012. <www.sciencedaily.com/releases/2012/09/120913083432.htm>.
National Institute for Materials Science. (2012, September 13). Brighter future for carbon dots. ScienceDaily. Retrieved March 31, 2015 from www.sciencedaily.com/releases/2012/09/120913083432.htm
National Institute for Materials Science. "Brighter future for carbon dots." ScienceDaily. www.sciencedaily.com/releases/2012/09/120913083432.htm (accessed March 31, 2015).

Share This


More From ScienceDaily



More Matter & Energy News

Tuesday, March 31, 2015

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

7-Year-Old Girl Gets 3-D Printed 'robohand'

7-Year-Old Girl Gets 3-D Printed 'robohand'

AP (Mar. 31, 2015) Although she never had much interest in prosthetic limbs before, Faith Lennox couldn&apos;t wait to slip on her new robohand. The 7-year-old, who lost part of her left arm when she was a baby, grabbed it as soon as it came off a 3-D printer. (March 31) Video provided by AP
Powered by NewsLook.com
Dutch Architects Show Off 3D House-Building Prowess

Dutch Architects Show Off 3D House-Building Prowess

Reuters - Innovations Video Online (Mar. 31, 2015) Dutch architects are constructing a 3D-printed canal-side home, which they hope will spark an environmental revolution in the house-building industry. Jim Drury reports. Video provided by Reuters
Powered by NewsLook.com
Solar Plane Stops in China

Solar Plane Stops in China

Reuters - News Video Online (Mar. 31, 2015) Solar Impulse 2 stops over in China&apos;s Chonqing, completing the fifth leg in its bid to become the first solar powered plane to travel around the globe. Rough Cut (no reporter narration). Video provided by Reuters
Powered by NewsLook.com
Solar Impulse Lands in China After 20-Hour Flight from Myanmar

Solar Impulse Lands in China After 20-Hour Flight from Myanmar

AFP (Mar. 31, 2015) Solar Impulse 2 lands in China, the world&apos;s biggest carbon emitter, completing the fifth leg of its landmark global circumnavigation powered solely by the sun. Duration: 00:55 Video provided by AFP
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:

Strange & Offbeat Stories


Space & Time

Matter & Energy

Computers & Math

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins