Browsing by Author "Reece, PJ"

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    Depth-resolved chemical modification of porous silicon by wavelength-tuned irradiation
    (American Chemical Society, 2012-11-06) Guan, B; Ciampi, S; Luais, E; James, M; Reece, PJ; Gooding, JJ
    The ability to impart discrete surface chemistry to the inside and outside of mesoporous silicon is of great importance for a range of biomedical applications, from selective (bio)sensing to tissue-specific drug delivery. Here we present a generic strategy toward achieving depth-resolved functionalization of the external and internal porous surfaces by a simple change in the wavelength of the light being used to promote surface chemical reactions. UV-assisted hydrosilylation, limited by the penetration depth of UV light, is used to decorate the outside of the mesoporous structure with carboxylic acid molecules, and white light illumination triggers the attachment of dialkyne molecules to the inner porous matrix. © 2012, American Chemical Society.
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    Study of gamma irradiation effect on commercial TiO2 photocatalyst
    (Elsevier, 2014-07-01) Bello Lamo, MP; Williams, P; Reece, PJ; Lumpkin, GR; Sheppard, LR
    The aim of this work is to understand the effect of gamma irradiation on commercial TiO2 photocatalyst for water treatment applications. Previous studies concluded that gamma-irradiation is able to modify the electronic properties of TiO2 based photocatalysts and consequently their photocatalytic performance. However, there are some discrepancies in the literature where on one hand a significant enhancement of the material properties is reported and on the other hand only a weak effect is observed. In this study a surface effect on TiO2 is confirmed by using low and medium gamma irradiation doses.© 2014, Elsevier Ltd.