%0 Journal Article
%T Room temperature sol-gel fabrication and functionalization for sensor applications
%A George Huyang
%A John Canning
%A Ingemar Petermann
%A David Bishop
%A Andrew McDonagh
%A Maxwell J. Crossley
%J Photonic Sensors
%@ 2190-7439
%D 2013
%I 
%R 10.1007/s13320-012-0075-2
%X The structure and physical properties of a thin titania sol-gel layer prepared on silicon and silica surfaces were examined. Spectroscopic (FTIR, UV-VIS spectroscopy), refractive index (ellipsometry) and microscopic (light microscopy and SEM/EDS) tools were used to examine both chemical uniformity and physical uniformity of the sol-gel glass layers. The conditions for the fabrication of uniform layers were established, and room temperature dopant incorporation was examined. The absorption bands of porphyrin-containing titania sol-gel layers were characterized. By addition of a metal salt to the titania layer, it was possible to metallate the free-base porphyrin within and change the UV-VIS absorbance of the porphyrin, the basis of metal detection using porphyrins. The metalloporphyrins were detected by localized laser ablation inductive coupled mass spectroscopy (LA-ICP-MS), indicating fairly uniform distribution of metals across the titania surface.
%K Sol-gel
%K titania
%K titanium dioxide
%K evanescent field
%K sensor
%K organic compound
%K spectroscopy
%K microscopy
%K surface functionalization
%K ablation inductive coupled mass spectroscopy
%U http://link.springer.com/article/10.1007/s13320-012-0075-2