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Bio
# Research activity:
►field of nanostructured materials based on Si-Ge-Sn, i.e. Ge quantum dots / nanocrystals alloyed with Si and/or Sn, embedded in oxides (HfO2, TiO2, SiO2), GeSi NCs films, epitaxial GeSn: preparation (magnetron sputtering, RTA, furnace annealing), experiment and modelling: study of electrical transport and phototransport, charge storage and ferroelectric properties in correlation with structure and morphology; effects produced by quantum confinement and localized states on the electrical and optical behavior;
►ferroelectric HfO2 and ZrO2 based structures by magnetron sputtering: #preparation; #characterization (C – V, P – V, PFM) correlated with structure and morphology (GI-XRD, Raman, TEM)
►trapping processes in monocrystals and multilayered nanostructures based on Si
# Experience:
- magnetron sputtering deposition, nanostructuring by (rapid) thermal annealing (thin films, multilayered structures);
- characterization: electrical properties (I–V, I–T), memory properties (C–V loops, C–t retention), phototransport (Iph–λ, Iph–V), ferroelectric properties (P-V), Raman spectroscopy, photoluminescence;
- modeling and simulation: *electrical transport mechanisms in nanostructures with Ge and SiGe nanocrystals/nanoparticles in oxides: tunneling, hopping; *charge storage mechanisms and characteristics; *electrical behavior of Si QDs in SiO2 films: percolation processes, electrical transitions between QC energy levels; *energy structure (QC energy levels/quasibands) of quantum dots with different shapes, embedded in amorphous matrix; DFT on small Ge and SiGe NCs for determining band gap; *spectral quantum efficiency of light absorption on QC levels and absorption threshold in QDs; *Raman (phonon QC in NCs) and *photoluminescence spectra (recombination on QC levels in NCs)
# Research projects:
- Project Coordinator of Romanian Young Teams TE contract no. 19/2018-21 "SiGeSn nanocrystals with charge storage properties at nanoscale" (SIGESNANOMEM)
- Key Person in M-ERA.NET projects PhotoNanoP/2016-18 and GESNAPHOTO/2016-19
- Team member in >15 national projects, e.g. Exploratory Research Projects PCE 191/2021-2023 & PCE 122/2017-19, Experimental - Demonstration Projects PED 531/2020-2022, 89/2017-18 & 42/2017-18, Frontier Complex Research Project PCCF 7/2018-20, Development of the national R&D system – Subprogram 1.2 CDI Complex project PCCDI 75/2018-20, Partnerships project 9/2012-16
# Publications:
- 35 papers in ISI quoted journals;
* main author in: Coatings 2022; J. Mater. Chem. C 2021; Materials 2021; J. Phys. Chem. C 2020; Sci. Rep. 2018; Nanotechnology 2017; Scripta Mater. 2016; P. Romanian Acad. A 2016; DJNB 2015; J. Nanopart. Res. 2013; DJNB 2011; J. Appl. Phys. 2010
- 25 papers in ISI IEEE conference proceedings
- 5 book chapters in: Springer (2018, 2014), IGI Global (2013), Publishing House of the Romanian Academy (2012, 2010)
# h-index = 16
# Patents and patent applications: 1 OSIM granted patent (RO131968-B1/2018); 6 OSIM patent applications (A/00193/2021; RO134049-A0/2020; RO133300-A0/2019; RO133299-A0/2019; RO133227-A0/2019; RO132946-A0/2018)
# 22 Oral presentations given at international meetings (conferences, colloquia, workshops)
# Invited presentation at International Workshop of Materials Physics (IWMP), Magurele 2016; #Co-author in 4 invited presentations
# Prize for Best Poster presented during E-MRS 2013 Spring Meeting (Strasbourg, France), Symposium J for early career researchers presenting their work at conf.
# 2013 “Radu Grigorovici” Award of the Romanian Academy
# Best Paper Awards at IEEE International Semiconductor Conference CAS 2018, 2017, 2016, 2013, 2011, 2009 editions (papers presented by Dr. Lepadatu in 2016, 2013, 2011 & 2009)
# ProInvent & EuroInvent DIPLOMAS & MEDALS: Diploma of Excellence & Silver Medal - ProInvent (International Exhibition of Research, Innovations and Inventions), XIXth edition, Cluj-Napoca 2021; Diploma of Excellence & ProInvent Medal - ProInvent, XVIIth edition, Cluj-Napoca 2019; Diploma of Excellence - EuroInvent (European Exhibition of Creativity and Innovation), 11th edition, Iasi 2019
# Research stage at Peter Grünberg Institute (Jülich, Germany) on PL and Raman characterization of Ge nanocrystals-based nanostructures (1.02–30.05.2012)
# Member of European Physical Society, European Microscopy Society, Romanian Physical Society, Romanian Electron Microscopy Society, American Chemical Society
# Editorial Board MEMBER of Coatings (mdpi)
# Reviewer for ISI journals: Nanomaterials, Materials, Coatings, Metals, Crystals, Applied Sciences, OAM, Thin Solid Films, P. Romanian Acad. A
Research Interests
Papers共 52 篇Author StatisticsCo-AuthorSimilar Experts
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SCIENTIFIC REPORTSno. 1 (2024): 3532-3532
Annals of the Academy of Romanian Scientists Series on Physics and Chemistry (2022)
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Author Statistics
#Papers: 70
#Citation: 2369
H-Index: 16
G-Index: 48
Sociability: 5
Diversity: 1
Activity: 1
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