Featured Research

from universities, journals, and other organizations

Using fullerenes as a 'cushion' for nanoparticles

Date:
April 17, 2010
Source:
Fraunhofer-Gesellschaft
Summary:
Nanoparticles are recognized as promising building blocks for future applications, however their fixation on surfaces or in a matrix is everything else than a simple task. Now physicists have observed that a double layer of spherical C60 carbon-molecules, called fullerenes, is an ideal substrate for these microscopic particles. Their results are an important step towards the application of tailor-made nanosystems.

Nanoparticles are recognized as promising building blocks for future applications, however their fixation on surfaces or in a matrix is everything else than a simple task. Now physicists have observed that a double layer of spherical C60 carbon-molecules, called fullerenes, is an ideal substrate for these microscopic particles. Their results, recently published in Nature Nanotechnology, are an important step towards the application of tailor-made nanosystems.

The properties of nanoparticles often differ from those of a large piece made of the same material. By tuning the size and composition of the nanoparticles, one can 'tailor' their chemical, optical or magnetic properties, and obtain features different from any bulk material. But for an application of this potential in the fields of catalysis, magnetic storage technology or optoelectronics, one has to fix the nanoparticles on surfaces or in matrixes. During this process the interaction with the surface or matrix at the worst destroys the unique properties of the nanoparticles.

Therefore it is important to develop techniques for a 'gentle' yet secure fixation of nanoparticles. This was now achieved by a team of physicists from the TU Dortmund, the University of Freiburg and the Fraunhofer Institute for Mechanics of Materials IWM, who deposited the particles on a layer of spherical C60 carbon-molecules, called fullerenes, and investigated their properties.

They showed that a double layer of fullerenes on a metal surface is an ideal substrate for the fixation of nanoparticles. The size and shape of the particles stayed unchanged for days even at room temperature, which is 'hot' for nanoscale processes. On a single layer of fullerenes, however, the particles shrank fast and disappeared within a few hours. Using atomic simulations this was traced back to temporary contacts bridging the fullerene layer and transporting atoms from the nanoparticles to the supporting metal surface.

On the basis of these results it might be possible, for example, to control the contact between nanoparticles by thin films which can either be penetrated or stay isolating. The scientists therefore not only demonstrated how to fix nanoparticles on surfaces without destruction of their geometric structure, but in particular they characterized a decay process for nanoparticles by the penetration of nanoscopic barriers in detail. These findings improve significantly the understanding of nanoparticle stability, which is an important step towards the application of tailor-made nanosystems.


Story Source:

The above story is based on materials provided by Fraunhofer-Gesellschaft. Note: Materials may be edited for content and length.


Journal Reference:

  1. Stefanie Duffe, Niklas Grφnhagen, Lukas Patryarcha, Benedikt Sieben, Chunrong Yin, Bernd von Issendorff, Michael Moseler, Heinz Hφvel. Penetration of thin C60 films by metal nanoparticles. Nature Nanotechnology, 2010; DOI: 10.1038/nnano.2010.45

Cite This Page:

Fraunhofer-Gesellschaft. "Using fullerenes as a 'cushion' for nanoparticles." ScienceDaily. ScienceDaily, 17 April 2010. <www.sciencedaily.com/releases/2010/04/100412112901.htm>.
Fraunhofer-Gesellschaft. (2010, April 17). Using fullerenes as a 'cushion' for nanoparticles. ScienceDaily. Retrieved April 17, 2014 from www.sciencedaily.com/releases/2010/04/100412112901.htm
Fraunhofer-Gesellschaft. "Using fullerenes as a 'cushion' for nanoparticles." ScienceDaily. www.sciencedaily.com/releases/2010/04/100412112901.htm (accessed April 17, 2014).

Share This



More Matter & Energy News

Thursday, April 17, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

German Researchers Crack Samsung's Fingerprint Scanner

German Researchers Crack Samsung's Fingerprint Scanner

Newsy (Apr. 16, 2014) — German researchers have used a fake fingerprint made from glue to bypass the fingerprint security system on Samsung's new Galaxy S5 smartphone. Video provided by Newsy
Powered by NewsLook.com
Porsche CEO Says Supercar Is Not Dead: Cue the Spyder 918

Porsche CEO Says Supercar Is Not Dead: Cue the Spyder 918

TheStreet (Apr. 16, 2014) — The Porsche Spyder 918 proves that, in an automotive world obsessed with fuel efficiency, the supercar is not dead. Porsche North America CEO Detlev von Platen attributes the brand's consistent sales growth -- 21% in 2013 -- with an investment in new technology and expanded performance dynamics. The hybrid Spyder 918 has 887 horsepower and 944 lb-ft of torque, but it can run 18 miles on just an electric charge. The $845,000 vehicle is not a consumer-targeted vehicle but a brand statement. Video provided by TheStreet
Powered by NewsLook.com
Industry's Optimism Shines At New York Auto Show

Industry's Optimism Shines At New York Auto Show

Newsy (Apr. 16, 2014) — After seeing auto sales grow last month, there's plenty for the industry to celebrate as it rolls out its newest designs. Video provided by Newsy
Powered by NewsLook.com
Ford Mustang Fetes Its 50th Atop Empire State Building

Ford Mustang Fetes Its 50th Atop Empire State Building

AFP (Apr. 16, 2014) — Ford celebrated the 50th birthday of its beloved Mustang by displaying a new model of the convertible on top of the Empire State Building in New York. Duration: 00:28 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:
from the past week

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