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Evanescent waveguide lab-on-chip for optical biosensing in food quality control

Photonics Research 2022年第6期10卷 1453-1461页

作者： ALESSIO BUZZIN RITA ASQUINI domenico caputo GIAMPIERO DE CESARE Department of Information Engineering Electronics and TelecommunicationsSapienza University of Rome00184 RomeItaly

Optical biosensing systems are commonly developed assembling a source,a light–sample interaction area,and a detector as distinct stand-alone *** present a compact,inexpensive,and easy-to-use glass chip that monolithically integrates both the interaction and detection elements in a 1 cm^(2)overall *** device working principle is based on evanescent wavelight interaction with the complex refractive index of a liquid mixture,being the index influenced by the mixture’s physical and chemical *** describe the manufacture of a prototype able to perform investigations on food quality and subsequent tests on the detection of fat content in *** investigations are reported as well as measurements performed on samples in the green spectrum.A sensitivity of about 139 fA/(g/d L)and a limit of detection of 14 ppm have been achieved,better than those of current commercial devices.

关键词： waveguide optical interaction

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Adsorption of Light Hydrocarbons on LTA and FER Zeolites

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American Journal of Analytical Chemistry 2013年第7期4卷 109-114页

作者： Fortunato Migliardini Fabio Iucolano domenico caputo Pasquale Corbo Dipartimento di Ingegneria dei Materiali e Della Produzione University of Naples “Federico II” Naples Italy Istituto Motori National Research Council of Italy Naples Italy

This paper reports the results of an experimental study on adsorption of light hydrocarbons on small pore microporous materials. The choice of hydrocarbons studied was affected taking into consideration the application of adsorption processes in removal of light hydrocarbons from exhaust streams of the petrochemical industry and of light-duty gasoline vehicles under cold start conditions (C4-C5 paraffins and olefins). The materials investigated were 5A and Ferrierite zeolites, characterized by different pore opening and Si/Al ratio. Equilibrium isotherm curves at room temperature were determined by a gravimetric method on dehydrated zeolites, while breakthrough curves in dynamic tests were used to evaluate the adsorption properties of hydrated zeolites at low hydrocarbon partial pressure (0-1 kPa) and in experimental conditions close to those of a HC trap at the engine exhaust. The experimental results regarding the adsorption capacities were discussed with the aim to understand how the physico-chemical characteristics of the adsorbent material could affect its trapping capability in adsorbing different types of hydrocarbons.

关键词： Hydrocarbon Adsorption Hydrocarbon Trap Ferrierite Linde 5A Engine Cold Start Emissions

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