Iuliana Mihalache

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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(More)
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(More)
Core-shell nanodot arrays of Ti/Au/TiO<inf>2</inf> have been obtained on EBL patterned substrates by RF sputtering of Ti in a controlled ambient of Ar/O<inf>2</inf> plasma. X-ray diffraction analyses showed that the TiO<inf>2</inf> films crystallinity and the lattice strain is strongly affected by the O2 content. Photoluminescence emission bands at 2.97 eV(More)
In this work, a significant improvement of the classical silicon nanowire (SiNW)-based photodetector was achieved through the realization of core-shell structures using newly designed GQDPEIs via simple solution processing. The poly(ethyleneimine) (PEI)-assisted synthesis successfully tuned both optical and electrical properties of graphene quantum dots(More)
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