Valentin Canpean

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The approach of combining different mechanisms of antibacterial action by designing hybrid nanomaterials provides a new paradigm in the fight against resistant bacteria. Here, we present a new method for the synthesis of silver nanoparticles enveloped in the biopolymer chitosan. The method aims at the production of bionanocomposites with enhanced(More)
Localized surface plasmon resonance (LSPR) sensing is combined with surface enhanced Raman scattering (SERS) detection on periodic arrays of subwavelength metallic nanoholes for the first time. LSPR sensors provide detection of molecular adsorption in both transmission and reflectivity modes with sensitivity greater that 300 nm/RIU and a spectral shift of(More)
In this work we present a simple approach for the fabrication of periodically ordered pyramidal-shaped metallic nanostructures and demonstrate their efficiency as SERS active substrates. Our method for the fabrication of the plasmonic substrate is based on nanoimprint lithography and exploits the thermal properties of two classes of polymers, thermoplastics(More)
We investigated the effect of the temperature of the plasmonic substrate on the surface enhanced Raman scattering of p-aminothiophenol adsorbed onto a particulate film of gold nanoparticles-decorated polystyrene nanospheres. The results demonstrated that temperature induces important modifications in the overall spectral signature of the charge transfer(More)
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