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Studies from National Institute of Standards and Technology Add New Findings in the Area of Nanotechnology

February 14, 2014



By a News Reporter-Staff News Editor at Science Letter -- New research on Nanotechnology is the subject of a report. According to news reporting out of Gaithersburg, Maryland, by NewsRx editors, research stated, "This tutorial proposes a comprehensive and rational measurement strategy that provides specific guidance for the application of asymmetric-flow field flow fractionation (A4F) to the size-dependent separation and characterization of nanoscale particles (NPs) dispersed in aqueous media. A range of fractionation conditions are considered, and challenging applications, including industrially relevant materials (e.g., metal NPs, asymmetric NPs), are utilized in order to validate and illustrate this approach."

Our news journalists obtained a quote from the research from the National Institute of Standards and Technology, "We demonstrate that optimization is material dependent and that polystyrene NPs, widely used as a reference standard for retention calibration in A4F, in fact represent a class of materials with unique selectivity, recovery and optimal conditions for fractionation; thus use of these standards to calibrate retention for other materials must be validated a posteriori. We discuss the use and relevance of different detection modalities that can potentially yield multi-dimensional and complementary information on NP systems. We illustrate the fractionation of atomically precise nanoclusters, which are the lower limit of the nanoscale regime. Conversely, we address the upper size limit for normal mode elution in A4F. The protocol for A4F fractionation, including the methods described in the present work is proposed as a standardized strategy to realize interlaboratory comparability and to facilitate the selection and validation of material-specific measurement parameters and conditions."

According to the news editors, the research concluded: "It is intended for both novice and advanced users of this measurement technology. ."

For more information on this research see: Rational strategy for characterization of nanoscale particles by asymmetric- flow field flow fractionation: A tutorial. Analytica Chimica Acta, 2014;809():9-24. Analytica Chimica Acta can be contacted at: Elsevier Science Bv, PO Box 211, 1000 Ae Amsterdam, Netherlands. (Elsevier - www.elsevier.com; Analytica Chimica Acta - www.elsevier.com/wps/product/cws_home/502681)

Our news journalists report that additional information may be obtained by contacting J. Gigault, NIST, Mat Measurement Sci Div, Gaithersburg, MD 20899, United States. Additional authors for this research include J.M. Pettibone, C. Schmitt and V.A. Hackley (see also Nanotechnology).

Keywords for this news article include: Maryland, Nanoscale, Gaithersburg, 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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