Publications by authors named "Riccardo Cristoforo Barberi"
The development of new anticounterfeiting solutions is a constant challenge and involves several research fields. Much interest is currently devoted to systems that are impossible to clone, based on the physical unclonable function (PUF) paradigm. In this work, a new strategy based on electrospinning and electrospraying of dye-doped polymeric materials is presented for the manufacturing of flexible free-standing films that embed simultaneously different PUF keys.
View Article and Find Full Text PDFThe behavior of lyotropic chromonic liquid crystals (LCLCs) in confined environments is an interesting research field that still awaits exploration, with multiple key variables to be uncovered and understood. Microfluidics is a highly versatile technique that allows us to confine LCLCs in micrometric spheres. As microscale networks offer distinct interplays between the surface effects, geometric confinement, and viscosity parameters, rich and unique interactions emerging at the LCLC-microfluidic channel interfaces are expected.
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- The study investigates how polyelectrolyte (PE) layers affect the SERS (Surface Enhancement Raman Spectroscopy) of substrates made of glass with gold nanoparticles (GNPs).
- Four sample types with varying PE layers (0, 3, 11, and 21) were analyzed using micro-Raman spectroscopy to evaluate the enhancement effect.
- It was found that as the number of PE layers increases, there is a corresponding increase in the intensity ratios of Raman bands related to acetic acid, attributed to improved interaction between laser light and the plasmonic properties of the GNPs due to changes in the surrounding medium.