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New Nanoporous Study Findings Recently Were Reported by Researchers at Lawrence Livermore National Laboratory (Photothermal Laser Microsintering of...

August 8, 2014



New Nanoporous Study Findings Recently Were Reported by Researchers at Lawrence Livermore National Laboratory (Photothermal Laser Microsintering of Nanoporous Gold)

By a News Reporter-Staff News Editor at Science Letter -- Fresh data on Nanoporous are presented in a new report. According to news reporting originating from Livermore, California, by NewsRx correspondents, research stated, "Photothermal processing of nanoporous gold using a microfocused continuous-wave laser at a wavelength of 532 nm and a 1/e(2) spot diameter of 2.9 mu m has been studied. In addition, complementary experiments have been carried out via conventional annealing."

Our news editors obtained a quote from the research from Lawrence Livermore National Laboratory, "Scanning electron microscopy has been used for characterization. Local laser irradiation at distinct laser powers and pulse lengths results in coarsening of the porous gold structures. During laser processing the pore size of the native nanoporous gold increases to maximum values in the range of 0.25-3 mu m. The affected areas exhibit lateral dimensions in the range of 2-10 mu m. Overall two regions are distinguished. An inner region, where large pores and ligaments are formed and an outer region, where the pore size and ligament size gradually change and approach the feature sizes of the native material. A qualitative thermokinetic model allows one to reproduce the experimentally observed dependence of the laser-induced morphologies on the laser parameters. On the basis of this model the underlying processes are attributed to sintering and melting of the gold structures."

According to the news editors, the research concluded: "The presented results demonstrate the prospects of photothermal laser processing in engineering porous gold with spatially varying porosities on micrometer to nanometer length scales."

For more information on this research see: Photothermal Laser Microsintering of Nanoporous Gold. Langmuir, 2014;30(24):7190-7197. 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)

The news editors report that additional information may be obtained by contacting L. Schade, Lawrence Livermore Natl Lab, Nanoscale Synth & Characterizat Lab, Livermore, CA 94550, United States. Additional authors for this research include S. Franzka, M. Mathieu, M.M. Biener, J. Biener and N. Hartmann (see also Nanoporous).

Keywords for this news article include: Livermore, California, Nanoporous, United States, Nanotechnology, Emerging Technologies, North and Central America

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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