News Column

Data from University of Cambridge Advance Knowledge in Nanoparticles

June 13, 2014



By a News Reporter-Staff News Editor at Science Letter -- Investigators discuss new findings in Nanoparticles. According to news originating from Cambridge, United Kingdom, by NewsRx correspondents, research stated, "The synthesis of gold nanoparticles (Au NPs) capped by poly(1-vinylpyrrolidin-2-one (PVP, average M over bar w= 10 000 kDa) yields moderately dispersed (6-8.5 nm) product with limited morphological control while larger NPs (15-20 nm) are reliably prepared using trisodium citrate (Na(3)Cit) as a reductant/capping agent. Excellent size control in the intermediate 10 nm regime is achieved by hybridizing these methodologies, with highly monodisperse, polycrystalline Au NPs forming."

Our news journalists obtained a quote from the research from the University of Cambridge, "For a Na(3)Cit:PVP:Au ratio of 3.5:3.5:1, anisotropic NPs with an aspect ratio of 1.8:1 suggest the systematic agglomeration of NP pairs. Enhanced control of NP morphology is allowed by the 1,2-tetradecanediol reduction of Au-III in the presence of straight chain, molecular anti-agglomerants. Last, ligand substitution is used to controllably grow preformed Au seeds. In spite of the extended growth phase used, the replacement of phosphine by 1-pentadecylamine affords highly monodisperse, cuboidal NPs containing a single clearly visible twinning plane."

According to the news editors, the research concluded: "The allowance of particle growth parallel to this close-packed plane explains the remarkable particle morphology."

For more information on this research see: Systematic Control of Size and Morphology in the Synthesis of Gold Nanoparticles. Particle & Particle Systems Characterization, 2014;31(5):571-579. Particle & Particle Systems Characterization can be contacted at: Wiley-V C H Verlag Gmbh, Boschstrasse 12, D-69469 Weinheim, Germany. (Wiley-Blackwell - www.wiley.com/; Particle & Particle Systems Characterization - onlinelibrary.wiley.com/journal/10.1002/(ISSN)1521-4117)

The news correspondents report that additional information may be obtained from P. Abdulkin, University of Cambridge, Dept. of Chem, Cambridge CB2 1EW, United Kingdom. Additional authors for this research include T.L. Precht, B.R. Knappett, H.E. Skelton, D.A. Jefferson and A.E.H. Wheatley (see also Nanoparticles).

Keywords for this news article include: Europe, Cambridge, United Kingdom, Nanotechnology, Emerging Technologies

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Source: Science Letter