X-ray irradiation induced reduction and nanoclustering of lead in borosilicate glass

H.B. Stanley, D. Banerjee, L.C.A. Breemen, van, J. Ciston, C.H. Liebscher, V. Martis, D. Hermida Merino, A. Longo, P. Pattison, G.W.M. Peters, G. Portale, Sabyasachi Sen, W. Bras

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Samenvatting

We have studied the formation of nanoparticles in lead sulfide (PbS)-doped borosilicate glass subjected to a two-step nucleation and growth heat treatment using in situ small-angle X-ray scattering (SAXS). The microstructure produced was subsequently characterized using X-ray powder diffraction (XRD) and transmission electron microscopy (TEM). While PbS nanocrystals of ca. 2 nm diameter are formed throughout the sample during the heat treatment, larger monodisperse Pb nanocrystals (diameter ca. 50 nm) are formed due to exposure to the X-ray beam, yielding space-selective nanoparticle growth. Time-resolved SAXS spectra are in the early stages consistent with diffusion-limited growth of the Pb particles. We attribute the X-ray-induced formation of nanocrystalline Pb to X-ray photoreduction of the Pb2+ atoms.
Originele taal-2Engels
Pagina's (van-tot)9331-9339
Aantal pagina's9
TijdschriftCrystEngComm
Volume2014
Nummer van het tijdschrift39
DOI's
StatusGepubliceerd - 2014

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