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Researchers from University of Bielefeld Detail Findings in Materials Science and Physical Chemistry (Tailoring the Mechanics of Ultrathin Carbon...

August 22, 2014



Researchers from University of Bielefeld Detail Findings in Materials Science and Physical Chemistry (Tailoring the Mechanics of Ultrathin Carbon Nanomembranes by Molecular Design)

By a News Reporter-Staff News Editor at Science Letter -- Research findings on Science are discussed in a new report. According to news reporting out of Bielefeld, Germany, by NewsRx editors, research stated, "Freestanding carbon nanomembranes (CNMs) with a thickness between 0.6 and 1.7 nm were prepared from self-assembled monolayers (SAMs) of diverse polyaromatic precursors via low-energy electron-induced cross-linking. The mechanical properties of CNMs were investigated using AFM bulge test, where a pressure difference was applied to the membrane and the resulting deflection was measured by atomic force microscopy."

Our news journalists obtained a quote from the research from the University of Bielefeld, "We found a correlation between the rigidity of the precursor molecules and the macroscopic mechanical stiffness of CNMs. While CNMs from rigid and condensed precursors like naphthalene and pyrene thiols prove to exhibit higher Young's moduli of 15-19 GPa, CNMs from nonfused oligophenyls possess lower Young's moduli of similar to 10 GPa. For CNMs from less densely packed SAMs, the presence of defects and nanopores plays an important role in determining their mechanical properties."

According to the news editors, the research concluded: "The finite element method (FEM) was applied to examine the deformation profiles and simulate the pressure-deflection relationships."

For more information on this research see: Tailoring the Mechanics of Ultrathin Carbon Nanomembranes by Molecular Design. Langmuir, 2014;30(27):8221-8227. Langmuir can be contacted at: Amer Chemical Soc, 1155 16TH St, NW, Washington, DC 20036, USA. (American Chemical Society - www.acs.org; Langmuir - www.pubs.acs.org/journal/langd5)

Our news journalists report that additional information may be obtained by contacting X.H. Zhang, University of Bielefeld, D-33615 Bielefeld, Germany. Additional authors for this research include C. Neumann, P. Angelova, A. Beyer and A. Golzhauser (see also Science).

Keywords for this news article include: Europe, Germany, Science, Bielefeld

Our reports deliver fact-based news of research and discoveries from around the world. Copyright 2014, NewsRx LLC


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Source: Science Letter


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