Adina Roxana Petcu

Novel materials based on DNA‐CTMA and lanthanide (Ce3+, Pr3+)

New, deoxyribonucleic acid (DNA) based compounds, functionalized with hexadecyltrimethylammonium chloride (CTMA) and lanthanide hydroxide nanoparticles were synthesized. The spectral measurements suggest that between the DNA-CTMA complex and the lanthanide (III) ions a chemical interaction takes place. The obtained materials exhibit an improved fluorescence efficiency, showing a potential interest for application in photonics, and more particularly, in light emitting devices.

Tunning the Colour of Solar Absorbers by Changing Chromophore Nature and Nanoparticle Size

In this paper some metallic (Au) and oxide (NiO and Cr2O3) nanoparticle dispersions are proposed as optical enhancers for solar collectors. The metallic nanoparticles are synthesised by photoreduction technique whereas the oxide nanoparticles are obtained by precipitation method, their shape and size being confined in a template of water-in-oil microemulsion. By using the mentioned template, monodispersed nanoparticles could be prepared, which have been further characterized by dynamic light scattering, transmission electron microscopy, diffuse reflectance spectroscopy and chromatic analysis. Correlation of these results is useful to obtain criteria for the design of Au or metallic oxides nanoparticles based solar absorbers.