By a News Reporter-Staff News Editor at Electronics Newsweekly -- New research on Nanoparticles is the subject of a report. According to news reporting out of Diepenbeek, Belgium, by VerticalNews editors, research stated, "We demonstrate a simple and effective approach to control the diameter of ultrathin ZnO nanowires with high aspect ratios and high densities over large areas. Diblock copolymer-based nanoparticle arrays exhibiting a high degree of hexagonal order and offering easy control of particle size (typically 1-10 nm) and interparticle spacing (25-150 nm) are utilized as nanocatalysts for the subsequent growth of semiconductor nanowires."
Our news journalists obtained a quote from the research from Hasselt University, "The as-grown ZnO nanowires exhibit a single crystal hexagonal wurtzite structure and grow along the  direction. Facetted catalyst particles were observed at the tip of the nanowires after synthesis, thus suggesting a catalyst-assisted vapor-solid-solid (VSS) rather than a vapor-liquid-solid (VLS) growth mechanism, the latter being frequently used in semiconductor nanowire production. Such a growth process allows us to easily prepare ultrathin ZnO nanowires with tunable diameters well below 10 nm by taking advantage of the inherent size control of the micellar method during deposition of the catalyst nanoparticles. Raman spectroscopy reveals a phonon confinement effect as the diameter of nanowires decreases."
According to the news editors, the research concluded: "Photoluminescence spectra of these ultrathin nanowires indicate a blue shift of the free excitons and their phonon replicas by 37 meV induced by quantum confinement."
For more information on this research see: Controlled synthesis of ultrathin ZnO nanowires using micellar gold nanoparticles as catalyst templates. Nanoscale, 2013;5(15):7046-53. (Royal Society of Chemistry - www.rsc.org/; Nanoscale - pubs.rsc.org/en/journals/journalissues/nr)
Our news journalists report that additional information may be obtained by contacting H. Yin, Institute for Materials Research (IMO-IMOMEC), Hasselt University, Wetenschapspark 1, B-3590, Diepenbeek, Belgium. Additional authors for this research include Q. Wang, S. Geburt, S. Milz, B. Ruttens, G. Degutis, J. D'Haen, L. Shan, S. Punniyakoti, M. D'Olieslaeger, P. Wagner, C. Ronning and H.G Boyen.
Keywords for this news article include: Europe, Belgium, Diepenbeek, Electronics, Semiconductor, Nanotechnology, Emerging Technologies.
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