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In the growing field of nanotechnology there is an increasing need to develop new methods to prepare metallic nanoparticles which provide control of size, colloidal dispersion and reproducibility, and, in the same time, to be environmentally friendly and relatively inexpensive. In the present work, we report two very simple and versatile methods to synthesize spherical gold nanoparticles (AuNPs) bellow...
Core-shell nanodot arrays of Ti/Au/TiO2 have been obtained on EBL patterned substrates by RF sputtering of Ti in a controlled ambient of Ar/O2 plasma. X-ray diffraction analyses showed that the TiO2 films crystallinity and the lattice strain is strongly affected by the O2 content. Photoluminescence emission bands at 2.97 eV and 2.59 eV evidenced the presence of point defects related to oxygen deficiency...
The effect of annealing in air and in nitrogen atmosphere on the structure, luminescence emission and electrical properties of ZnO, Li:ZnO and Cu:ZnO doped thin films prepared by sol-gel method was investigated by scanning electron microscopy, X-ray diffraction, photoluminescence and resistivity measurements. The films annealed in nitrogen demonstrate smoother surfaces, improved crystallinity and...
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