ITA Nanotrust Dossiers
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DATUM, UNTERSCHRIFT / DATE, SIGNATURE
BANK AUSTRIA CREDITANSTALT, WIEN (IBAN AT04 1100 0006 2280 0100, BIC BKAUATWW), DEUTSCHE BANK MÜNCHEN (IBAN DE16 7007 0024 0238 8270 00, BIC DEUTDEDBMUC)
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ITA Nanotrust Dossiers
Ulrich Fiedeler,
René Fries
doi:10.1553/ita-nt-025en Eigenverlag/Self
Abstract: As far as concerns the risks of nanotechnology, the focus of attention is on nanomaterials and in particular on free nanoparticles. Alongside the investigation of their possible toxicity, the question of the exposure of humans and the environment is an essential element of their risk assessment. Nanoparticles suspended (distributed and embedded) freely in the air are of particular relevance, since they can easily penetrate the human body via the lungs. In addition, it is extremely difficult to monitor the spread of nanoparticles in the air. Commercially available particle counters can be used to determine the concentration of particles and droplets in the air down to a size of a few nanometres. In the light of the high background concentration of natural nanoparticles and those generated by human activity, the first priority is to distinguish between natural and synthetic nanoparticles. While an on-site concentration measurement can be carried out in a few minutes, the analysis of the nanoparticles contained in the air, that is the determination of their form and composition is only possible using complex electron microscopy procedures in the laboratory. This situation currently constitutes the main problem for determining the concentration of synthetic nanoparticles and will do so for the near future. Keywords: airborne-nanoparticles risks nanotechnology nanotrust-dossier Published Online: 2012/03/11 11:46:34 Document Date: 2012/03/10 11:46:00 Object Identifier: 0xc1aa5576 0x002aa77f Rights: . Das NanoTrust-Team bietet an dieser Stelle in loser Folge sog. Dossiers an, die in leicht-fasslicher, aber wissenschaftlich fundierter Weise auf ca. drei bis sechs Seiten den aktuellen Wissensstand zu den aktuellen Themen der aufkommmenden Nanodebatte zusammenfassen. |
epub.oeaw – Institutionelles Repositorium der Österreichischen Akademie der Wissenschaften epub.oeaw – Institutional Repository of the Austrian Academy of Sciences
A-1011 Wien, Dr. Ignaz Seipel-Platz 2
Tel. +43-1-515 81/DW 3420, Fax +43-1-515 81/DW 3400 http://epub.oeaw.ac.at, e-mail: epub@oeaw.ac.at |