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Your search keyword '"Signorini, Raffaella"' showing total 114 results
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114 results on '"Signorini, Raffaella"'

103. C60 derivatives embedded in sol-gel silica films

Author

Maggini, Michele, primary, Scorrano, Gianfranco, additional, Prato, Maurizio, additional, Brusatin, Giovana, additional, Innocenzi, Plinio, additional, Guglielmi, Massimo, additional, Renier, Alessandro, additional, Signorini, Raffaella, additional, Meneghetti, Moreno, additional, and Bozio, Renato, additional

Published
1995
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109. Strategy for the improvement of mixingin microdevices

Author

Fortunati, Ilaria, Rossetto, Nicola, Signorini, Raffaella, Ferrante, Camilla, Carlotto, Silvia, and Polimeno, Antonino

Abstract

One of the most promising way to exploit microfluidic systems isas microreactors. A microreactor can be considered as a microchamberwhere chemical reactions take place, aimed at the synthesis of novelmaterials with controlled experimental conditions. The main goal isto reach the highest efficiency towards the desired output product.Mixing is usually very slow in microchannels, when laminar flow conditionscharacterized by low Reynolds numbers (below 3000) are applied. Manydifferent strategies can be proposed to enhance mixing. In this workwe explore and model the behavior of microreactor prototypes havingdifferent geometry and aimed at the improvement of mixing efficiency.These prototypes exploit either the hydrodynamic focusing effect orthe presence of microstructuration inside the microchannel. In thefirst case, the focusing effect is used to reduce the diffusion distancebetween the molecules flowing in the reactors. In the second approach,we explore the influence of lateral steps fabricated inside the channelson the mixing efficiency. The behavior of fluid features is numericallymodeled via Navier-Stokes equations coupled to convection-diffusionequations. Moreover, fluorescence based techniques are used to characterizethe mixing efficiency in the experimental devices.

Published
2011
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111. A Review on Surface-Enhanced Raman Scattering.

Author

Pilot, Roberto, Signorini, Raffaella, Durante, Christian, Orian, Laura, Bhamidipati, Manjari, and Fabris, Laura

Subjects
RAMAN scattering, MATERIALS science, FACTOR analysis, SCIENTISTS, WAVELENGTHS
Abstract

Surface-enhanced Raman scattering (SERS) has become a powerful tool in chemical, material and life sciences, owing to its intrinsic features (i.e., fingerprint recognition capabilities and high sensitivity) and to the technological advancements that have lowered the cost of the instruments and improved their sensitivity and user-friendliness. We provide an overview of the most significant aspects of SERS. First, the phenomena at the basis of the SERS amplification are described. Then, the measurement of the enhancement and the key factors that determine it (the materials, the hot spots, and the analyte-surface distance) are discussed. A section is dedicated to the analysis of the relevant factors for the choice of the excitation wavelength in a SERS experiment. Several types of substrates and fabrication methods are illustrated, along with some examples of the coupling of SERS with separation and capturing techniques. Finally, a representative selection of applications in the biomedical field, with direct and indirect protocols, is provided. We intentionally avoided using a highly technical language and, whenever possible, intuitive explanations of the involved phenomena are provided, in order to make this review suitable to scientists with different degrees of specialization in this field. [ABSTRACT FROM AUTHOR]

Published
2019
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