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The research team is focused on the development of a chip-sized spectroscopy microsystem for the detection of gastrointestinal (GI) early cancerous lesions. The paper will briefly cover the outstanding properties of diffuse reflectance and fluorescence spectroscopy detection and the concept of cointegration of highly selective thin-films optical interference filters on silicon photodiodes, in order...
This paper describes the design of a miniature, cost-effective spectroscopy system for assessing tissue biochemical and morphological information using a few wavelengths. This instrument will integrate thin-film optical filters and silicon photodiodes, avoiding the use of a spectrograph and optical fibers. The components in the set-up design are described. The feasibility of using only 16 wavelengths...
Liquid-liquid extraction is essential to the spent nuclear fuel reprocessing industry, and future more efficient plants will require the development of increasingly selective chemical processes. Interactions between the actinides and organic ligands must be better understood for this purpose, particularly near liquid-liquid interfaces. We therefore undertook to develop a measuring instrument combining...
A new optical platform for the interrogation of a polymethylmethacrylate (PMMA) multichannel array for chemical and biochemical parameters is described. It consists of a plastic chip formed by two pieces of PMMA properly shaped in order to obtain different microchannels, 500 mum in width and 400 mum in height. A fluorescent sensing layer is immobilized on the internal wall of the microchannel. The...
Design and characterization of a new generation of single-photon avalanche diodes (SPAD) array, manufactured by ST-Microelectronics in Catania, Italy, are presented. Device performances, investigated in several experimental conditions and here reported, demonstrate their suitability in many applications. SPADs are thin p-n junctions operating above the breakdown condition in Geiger mode at low voltage...
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