, schildert Forschungsgruppenleiter Prof. Bo Iversen.
In den Kapillaren wandelten die Forscher in Wasser gelöstes sogenanntes Ammonium-Meta-Wolframat bei hohem Druck und hoher Temperatur zu Nanopartikeln um.
Mit dem hellen Röntgenlicht von PETRA III konnten die Chemiker in Echtzeit verfolgen, wie aus der Lösung Wolfram-Trioxid-Partikel (WO3) mit einer Größe von rund zehn Nanometern wuchsen.
www.desy.de“ We use fine capillaries of sapphire or fused silica which are easily penetrable by X-rays, ” said Professor Bo Iversen, head of the research group.
In these capillaries, the scientists transformed so-called ammonium metatungstate dissolved in water into nanoparticles at high temperature and high pressure.
With the brilliant PETRA III X-ray light, the chemists were able to track the growth of small tungsten trioxide particles (WO3) with a typical size of about ten nanometres from the solution in real time.
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