NM-Series of representative manufactured nanomaterials: NM-300 silver characterisation, stability, homogeneity

Medientyp: E-Book

Titel: NM-Series of representative manufactured nanomaterials : NM-300 silver characterisation, stability, homogeneity

Beteiligte: Klein, C. L. [Mitwirkende:r]; Stahlmecke, B. [Mitwirkende:r]; Romazanov, J. [Mitwirkende:r]; Kuhlbusch, T. A. J. [Mitwirkende:r]; Van Doren, E. [Mitwirkende:r]; De Temmerman, P-J. [Mitwirkende:r]; Mast, J. [Mitwirkende:r]; Wick, P. [Mitwirkende:r]; Krug, H. [Mitwirkende:r]; Locoro, G. [Mitwirkende:r]; Hund-Rinke, K. [Mitwirkende:r]; Kördel, W. [Mitwirkende:r]; Friedrichs, S. [Mitwirkende:r]; Maier, G. [Mitwirkende:r]; Werner, J. [Mitwirkende:r]; Linsinger, Th [Mitwirkende:r]; Gawlik, B. M. [Mitwirkende:r]; Comero, S. [Mitwirkende:r]

Körperschaft: European Commission, Joint Research Centre ; European Commission, Joint Research Centre ; European Commission, Joint Research Centre

Erschienen: Luxembourg: Publications Office, 2011

Umfang: 1 Online-Ressource (86 p.); Illustrationen (farbig)

Sprache: Englisch

DOI: 10.2788/23079

ISBN: 9789279190681

Identifikator:

Schlagwörter: advanced materials ; medical science ; environmental risk prevention ; health risk ; nanotechnology ; research report

Entstehung:

Anmerkungen: Bibl. : p. 81-83

Beschreibung: The European Commission Joint Research Centre (JRC) provides scientific support to European Union policy regarding nanotechnology and public health in a sustainable environment. Over the last three years, the JRC has focused part of its work on establishing and applying a priority list (NM-Series) of representative manufactured nanomaterials (RMNs) in support of one of the most comprehensive nanomaterial research programmes that is currently being carried out: the Organisation for Economic Co-operation and Development's (OECD) Working Party on Manufactured Nanomaterials (WPMN) Sponsorship Programme. The JRC's provision of NM-Series RMNs to the OECD WPMN Sponsorship Programme ultimately enables the development and collection of data on characterisation, measurement, toxicological and eco-toxicological testing, and risk assessment or safety evaluation of nanomaterials. Representative nanomaterials are of utmost importance to be made available to the international scientific community to enable innovation and development of safe materials and products. This report describes the characterisation of NM-300, a RMN nano-silver dispersion containing nanoparticles (NPs) of < 20 nm, originating from a single batch of manufactured nano-silver, used for measurement and testing for hazard identification, risk and exposure assessment studies. The first series of sub-samples created from the batch is labelled NM-300, while the further processed series of NM 300 is labelled with an additional 'K' as NM 300K, in order to signify a continued processed number of sub-samples from the same batch of raw material. This NM-Series material was produced in the frame of the JRC programme on nanomaterials. It was studied by a number of international laboratories including the JRC IES analytical laboratory. Inorganic chemical characterisation of the total silver content and the homogeneity of the silver distribution were performed using photometry and ICP-OES. To this end, a dedicated method was developed and validated according to the principles of ISO 17025. Key properties of size and size distribution were studied in an inter-laboratory comparative study using SEM as well as TEM and nanoparticle tracking analysis. Furthermore, the release of silver ions from the NM-300 was studied after embedding in an acrylic matrix. The NM-300 silver <20 nm was found to contain silver particles of about 15 nm size with a narrow size distribution of 99 % of the particle number concentration exhibiting a diameter of below 20 nm. A second, much smaller abundance of particles was identified by TEM to have narrow diameter distribution of around 5 nm. The silver content and particle number of NM-300 was shown to be stable over the time of examination, lasting up to 12 months. Silver-ions were released from NM-300 silver nanomaterial, which was embedded in a poly-acrylic matrix up to a defined concentration level. The properties of NM-300 studied and described in this report demonstrate its relevance for use in measurement and testing studies, such as for hazard identification, related to the safety of nanomaterials. The studies were performed in close collaboration with the Fraunhofer Institute for Molecular and Applied Ecology (Fh-IME), German Institute of Energy and Environmental Technology e.V. (IUTA), the Swiss Federal Laboratories for Materials Science and Technology (EMPA), RAS Material Science GmbH, Germany, and the Veterinary and Agrochemical Research Centre (VAR) in Belgium.

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