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Nanophysics: Serving Up Buckyballs On A Silver Platter

Date:
August 21, 2009
Source:
American Physical Society
Summary:
New measurements conducted on C60 molecules (carbon Buckyballs) adhered to silver substrates push the limits of surface science.

Scientists have imaged the complete structure of C60 molecules on a silver surface with electron diffraction.
Credit: Image copyright American Physical Society [Illustration: Alan Stonebraker after H. I. Li et al.]

Scientists at Penn State University, in collaboration with institutes in the US, Finland, Germany and the UK, have figured out the long-sought structure of a layer of C60 – carbon buckyballs – on a silver surface. The results, which could help in the design of carbon nanostructure-based electronics are reported in Physical Review Letters and highlighted in the July 27th issue of APS's online journal Physics.

Ever since the 1985 discovery of C60, this molecule, with its perfect geodesic dome shape has fascinated scientists, physicists, and chemists alike. Like a soccer ball, the molecule consists of 20 carbon hexagons and 12 carbon pentagons. The electronic properties of C60 are very unusual, and there is a massive research effort toward integrating it into molecular scale electronic devices like transistors and logic gates.

To do this, researchers need to know how the molecule forms bonds with a metal substrate, such as silver, which is commonly used as an electrode in devices. Now, Hsin-I Li, Renee Diehl, and colleagues have determined the geometry of C60 on a silver surface using a technique called low-energy electron diffraction.

They find that the silver atoms rearrange in such a way – namely, by forming a 'hole' beneath each C60 molecule - that reinforces the bonding between the carbon structure and the silver surface.

The measurements push the limits of surface science because the molecules and the re-arrangement of the underlying silver atoms are quite complex. The measurements thus open the door to studies of a large number of technologically and biologically important molecules on surfaces.


Story Source:

The above story is based on materials provided by American Physical Society. Note: Materials may be edited for content and length.


Cite This Page:

American Physical Society. "Nanophysics: Serving Up Buckyballs On A Silver Platter." ScienceDaily. ScienceDaily, 21 August 2009. <www.sciencedaily.com/releases/2009/07/090727102133.htm>.
American Physical Society. (2009, August 21). Nanophysics: Serving Up Buckyballs On A Silver Platter. ScienceDaily. Retrieved September 19, 2014 from www.sciencedaily.com/releases/2009/07/090727102133.htm
American Physical Society. "Nanophysics: Serving Up Buckyballs On A Silver Platter." ScienceDaily. www.sciencedaily.com/releases/2009/07/090727102133.htm (accessed September 19, 2014).

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