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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.

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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.


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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 March 3, 2015 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 March 3, 2015).

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