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Recent Studies from Technical University Add New Data to Nanotechnology (AFM nanoscale indentation in air of polymeric and hybrid materials with...

August 22, 2014



Recent Studies from Technical University Add New Data to Nanotechnology (AFM nanoscale indentation in air of polymeric and hybrid materials with highly different stiffness)

By a News Reporter-Staff News Editor at Science Letter -- A new study on Nanotechnology is now available. According to news reporting out of Milan, Italy, by NewsRx editors, research stated, "In this study, nanomechanical properties of a variety of polymeric materials was investigated by means of AFM. In particular, selecting different AFM probes, poly(methyl methacrylate) (PMMA), polydimethylsiloxane (PDMS) bulk samples, sol-gel hybrid thin films and hydrated hyaluronic acid hydrogels were indented in air to determine the elastic modulus."

Our news journalists obtained a quote from the research from Technical University, "The force-distance curves and the indentation data were found to be greatly affected by the cantilever stiffness and by tip geometry. AFM indentation tests show that the choice of the cantilever spring constant and of tip shape is crucially influenced by elastic properties of samples. When adhesion-dominated interactions occur between the tip and the surface of samples, force-displacement curves reveal that a suitable functionalization of AFM probes allows the control of such interactions and the extraction of Young' modulus from AFM curves that would be otherwise unfeasible. By applying different mathematical models depending on AFM probes and materials under investigation, the values of Young's modulus were obtained and compared to those measured by rheological and dynamic mechanical analysis or to literature data."

According to the news editors, the research concluded: "Our results show that a wide range of elastic moduli (10 kPa-10 GPa) can be determined by AFM in good agreement with those measured by conventional macroscopic measurements."

For more information on this research see: AFM nanoscale indentation in air of polymeric and hybrid materials with highly different stiffness. Applied Surface Science, 2014;311():558-566. Applied Surface Science can be contacted at: Elsevier Science Bv, PO Box 211, 1000 Ae Amsterdam, Netherlands. (Elsevier - www.elsevier.com; Applied Surface Science - www.elsevier.com/wps/product/cws_home/505669)

Our news journalists report that additional information may be obtained by contacting R. Suriano, Politecn Milan, Dept. of Chem Mat & Chem Engn Giulio Natta, I-20133 Milan, Italy. Additional authors for this research include C. Credi, M. Levi and S. Turri (see also Nanotechnology).

Keywords for this news article include: Milan, Italy, Europe, Nanoscale, Nanotechnology, Emerging Technologies

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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