News Column

Data on Materials Science and Physical Chemistry Reported by Researchers at University of Wisconsin

May 23, 2014

By a News Reporter-Staff News Editor at Science Letter -- Current study results on Science have been published. According to news reporting out of Madison, Wisconsin, by NewsRx editors, research stated, "Recently, single-walled carbon nanotubes as well as graphene functionalized with azobenzene chromophores have drawn attention for applications in optoelectronics due to their ability to undergo cis-trans isomerization when exposed to light. The electronic properties of the nanocarbon materials at these unconventional interfaces can be tailored by gaining structural insight into the organic monolayers at the molecular level."

Our news journalists obtained a quote from the research from the University of Wisconsin, "In this work, we use polarization-dependent X-ray absorption spectroscopy to probe the orientation of three chromophores on graphene, all identical except for their terminal groups. All three terminal groups (methyl, nitro, and nitrite) are well-oriented, with a tilt angle of about 30 from the substrate for the shared azobenzene group."

According to the news editors, the research concluded: "Density functional theory calculations are in good agreement with experimental results and give two similar, stable configurations for the orientation of these molecules on graphene."

For more information on this research see: Orientation of a Mono layer of Dipolar Molecules on Graphene from X-ray Absorption Spectroscopy. Langmuir, 2014;30(9):2559-2565. Langmuir can be contacted at: Amer Chemical Soc, 1155 16TH St, NW, Washington, DC 20036, USA. (American Chemical Society -; Langmuir -

Our news journalists report that additional information may be obtained by contacting P.S. Johnson, University of Wisconsin, Dept. of Chem, Madison, WI 53706, United States. Additional authors for this research include C.S. Huang, M. Kim, N.S. Safron, M.S. Arnold, B.M. Wong, P. Gopalan and F.J. Himpsel (see also Science).

Keywords for this news article include: Madison, Science, Wisconsin, United States, North and Central America

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Source: Science Letter

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