A5040032354- ZnO doping and properties
- Silicon Nanostructures and Photoluminescence
- Chalcogenide Semiconductor Thin Films
- Nanowire Synthesis and Applications
- Anodic Oxide Films and Nanostructures
- Quantum Dots Synthesis And Properties
- GaN-based semiconductor devices and materials
- Gas Sensing Nanomaterials and Sensors
- Semiconductor materials and devices
- Ga2O3 and related materials
- Semiconductor Quantum Structures and Devices
- Semiconductor materials and interfaces
- Photonic Crystals and Applications
- Crystal Structures and Properties
- Solid-state spectroscopy and crystallography
- Advanced Semiconductor Detectors and Materials
- Copper-based nanomaterials and applications
- Photonic and Optical Devices
- Perovskite Materials and Applications
- Terahertz technology and applications
- Advanced Photocatalysis Techniques
- Metamaterials and Metasurfaces Applications
- Transition Metal Oxide Nanomaterials
- TiO2 Photocatalysis and Solar Cells
- High-pressure geophysics and materials
Technical University of Moldova
2016-2025
Academy of Sciences of Moldova
2015-2024
Kiel University
2003-2018
University of Bucharest
2018
Fachhochschule Kiel
2018
Academy of Romanian Scientists
2018
National Institute for Research and Development in Microtechnologies
2018
Institute of Applied Physics
2004-2013
UNSW Sydney
2013
Karlsruhe Institute of Technology
2013
A cost-effective synthesis was used to grow Zn<sub>x</sub>Cu<sub>1−x</sub>O<sub>y</sub> nanostructures. DFT calculations show that charge transfer along with changes in Fermi level facilitate H<sub>2</sub> gas sensing, which is further enhanced by Zn doping.
Abstract The paper reviews electrochemically etched pores in III–V compound semiconductors (GaP, InP, GaAs) with emphasis on nucleation and formation mechanisms, pore geometries morphologies, to several instances of self‐organization. Self‐ organization issues include the single‐crystalline two‐dimensional hexagonal arrays lattice constants as small 100 nm found synchronized unsynchronized diameter oscillations coupled current voltage oscillations, domain formation. findings are discussed...
In this work, the exceptionally improved sensing capability of highly porous three-dimensional (3-D) hybrid ceramic networks toward reducing gases is demonstrated for first time. The 3-D are based on doped metal oxides (MexOy and ZnxMe1–xOy, Me = Fe, Cu, Al) alloyed zinc oxide tetrapods (ZnO-T) forming numerous junctions heterojunctions. A change in morphology samples formation different complex microstructures achieved by mixing metallic (Fe, microparticles with ZnO-T grown flame transport...
Stretchable ceramic networks built from quasi-one-dimensional (Q1D) structures are important candidates for various applications of nanostructures in real-world technologies. A flame transport synthesis approach is developed that enables versatile interconnected SnO2 nanowire networks. These exhibit interesting defects very relevant the oxide material-engineering community. Devices based on Q1D structure show enormous potential gas/UV sensing. As a service to our authors and readers, this...
We demonstrate a new technique that requires relatively low temperature of 670–800 °C to synthesize in 10–20 min high crystalline quality MoO3 nano- and microbelts ribbons. The developed technological process allows rapid synthesis large amounts microsheets, belts, ribbons, it can be easily scaled up for various applications. Scanning electron microscopy (SEM) studies revealed the ribbons are synthesized uniformly, thickness is observed vary from 20 1000 nm. detailed structural vibrational...
The electrochemical growth of ZnO nanowire arrays on p-type GaN (0001) single crystalline thin films supported sapphire is demonstrated for the first time. wires were directly epitaxially grown with relationship ZnO(0001)[101̅0]∥GaN(0001)[101̅0]. By glancing-angle XRD experiments, mosaicity was shown to be as low 1.2°. deposited ZnO-NWs exhibited a very density intrinsic defects by micro-Raman and photoluminescence (PL) experiments. only significant PL emission heterojunction at room...
Abstract ZnO nanowires were synthesized by the CVD procedure and have been investigated SEM, TEM, SAED, Raman, cw PL spectroscopy. The fabrication of an ultraviolet (UV) photoconductive detector based on single nanowire (100 nm in diameter) is presented. This nanostructure prepared Focused Ion Beam (FIB) set‐up using nanodeposition for metal electrodes. photoresponse UV sensor are studied a source with incident peak wavelength 365 nm. It was demonstrated that output signal sensors...
An electrochemical approach for manufacturing light-driven nanostructured titanium dioxide (TiO2 ) microengines with controlled spatial architecture improved performance is reported. The based on microscale arrays of TiO2 nanotubes variable (50-120 nm) inner diameter show a quasi-ordered arrangement nanotubes, being the smallest tubular entities catalytic reported to date. exhibit well defined crystalline phases depending upon postfabrication annealing conditions that determine microengines'...
Titania (TiO 2 ) exists in several phases possessing different physical properties. In view of this fact, we report on three types hydrogen sensors based individual TiO nanotubes (NTs) with structures consisting amorphous, anatase or anatase/rutile mixed phases. Different the NTs were produced by controlling temperature post‐anodization thermal treatment. Integration chip was performed employing metal deposition function focused ion beam (FIB/SEM) instrument. Gas response studied for devices...
Abstract In present work, the nano- and microscale tetrapods from zinc oxide were integrated on surface of Aerographite material (as backbone) in carbon-metal hybrid hierarchical network via a simple single step magnetron sputtering process. The fabricated networks are characterized for morphology, microstructural optical properties. cathodoluminescence investigations revealed interesting luminescence features related to carbon impurities inherent host defects oxide. Because wide bandgap its...
Multiphonon resonant Raman scattering (RRS) was studied in unintentionally doped bulk $\mathrm{ZnO}$ crystals and layers, including nanostructured highly conductive films, excited by 351.1 $363.8\phantom{\rule{0.3em}{0ex}}\mathrm{nm}$ laser lines the temperature interval from 10 to $300\phantom{\rule{0.3em}{0ex}}\mathrm{K}$. The variation of conditions with sample wavelength excitation line allowed us discriminate between incoming outgoing exciton mediated RRS LO phonons. quenching...
In this review paper, we present a comparative analysis of the electrochemical dissolution III–V (InP, GaAs, GaN), II–VI (ZnSe, CdSe) and SiC semiconductor compounds. The resulting morphologies are discussed, including those porous layers networks low-dimensional structures such as nanowires, nanobelts, nanomembranes. Self-organized phenomena in anodic etching disclosed, leading to formation controlled patterns quasi-ordered distribution pores. Results templated deposition metal nanotubes...
Porous GaP layers prepared by electrochemical anodization of (100)-oriented bulk material was found to exhibit blue and ultraviolet photoluminescence when excited a KrF excimer laser. The energy position the UV luminescence band (3.3 eV at 300 K) is explained on basis charge carrier confinement in crystalline quantum wires about 25 Å diameter. Additional evidence for size effect porous obtained Raman scattering measurements.