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Controlled fabrication of osmium nanocrystals by electron, laser and microwave irradiation and characterisation by microfocus X-ray absorption spectroscopy

DOI: 10.1039/C7CC07133G DOI Help

Authors: Anais Pitto-barry (University of Warwick; University of Bradford) , Kalotina Geraki (Diamond Light Source) , Michael D. Horbury (University of Warwick) , Vasilios G. Stavros (University of Warwick) , J. Frederick W. Mosselmans (Diamond Light Source) , Richard I. Walton (University of Warwick) , Peter J. Sadler (University of Warwick) , Nicolas P. E. Barry (University of Warwick; University of Bradford)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Chem. Commun. , VOL 115

State: Published (Approved)
Published: October 2017
Diamond Proposal Number(s): 11314

Abstract: Osmium nanocrystals can be fabricated by electron (3–50 nm, formed by atom migration), 785–815 nm laser (20–50 nm, in micelle islands), and microwave (ca. 1 nm in arrays, >100 mg scale) irradiation of a polymer-encapsulated OsII carborane; microfocus X-ray absorption studies at the Os LIII-edge show differences between the three preparation methods, suggesting that the electron-beam irradiated materials have a significant support interaction and/or surface oxidation, while the laser and microwave samples are more like metallic osmium.

Subject Areas: Chemistry

Instruments: I18-Microfocus Spectroscopy