BrainMap

Mr. Ionel Stavarache

Dr.

Scientific Researcher 2nd degree - INSTITUTUL NATIONAL DE CERCETARE - DEZVOLTARE PENTRU FIZICA MATERIALELOR BUCURESTI RA

Researcher

Publons/ResearcherID: B-7130-2011

Curriculum Vitae (16/06/2021)

Expertise & keywords

Investigations on advanced dielectric materials and structures in Terahertz and millimeter waves Call name: Exploratory Research Projects - PCE-2012 call
PN-II-ID-PCE-2012-4-0654 2013 - 2016

Role in this project: Key expert

Coordinating institution: INSTITUTUL NATIONAL DE CERCETARE - DEZVOLTARE PENTRU FIZICA MATERIALELOR BUCURESTI RA

Project partners: INSTITUTUL NATIONAL DE CERCETARE - DEZVOLTARE PENTRU FIZICA MATERIALELOR BUCURESTI RA (RO)

Affiliation: INSTITUTUL NATIONAL DE CERCETARE - DEZVOLTARE PENTRU FIZICA MATERIALELOR BUCURESTI RA (RO)

Project website: http://www.infim.ro/node/4190

Abstract:

At the present, terahertz technology is certainly one of the most dynamic research fields with wide variety of applications: terabit wireless communication, spectroscopy, biology, medical sciences, food control, security systems, etc. The project aims to investigate advanced conventional as well as structured materials in Terahertz and millimeter wave range. On one hand, highly accurate characterization methods of complex perovskite dielectrics (bulk and thin films) with high values of the product between the quality factor and the frequency will be developed for millimeter wave and Terahertz range. The application of development methods to measure ferroelectric perovskites in Terahertz range is very important for such applications as tunable photonic crystal filters. On the other hand, numerical and experimental investigations on structured materials will allow the study of the Terahertz spoof surface plasmon-polaritons in new complex geometries. The electromagnetic simulation, fabrication and characterization of the proposed materials and structures will benefit of recent acquisitioned state-of-the-art equipment in the host institution. The final outcome of the project will consist in solution for an improved controlled of the electromagnetic radiation in millimeter wave and Terahertz range.

Novel nanostructured semiconductor materials based on Ge nanoparticles in different oxides for aplications in VIS-NIR photodetectors and nonvolatile memory devices Call name: Joint Applied Research Projects - PCCA-2011 call, Type 2
PN-II-PT-PCCA-2011-3.2-1120 2012 - 2016

Role in this project: Key expert

Coordinating institution: INSTITUTUL NATIONAL DE CERCETARE - DEZVOLTARE PENTRU FIZICA MATERIALELOR BUCURESTI RA

Project partners: INSTITUTUL NATIONAL DE CERCETARE - DEZVOLTARE PENTRU FIZICA MATERIALELOR BUCURESTI RA (RO); INSTITUTUL NATIONAL DE CERCETARE- DEZVOLTARE PENTRU MICROTEHNOLOGIE - IMT BUCURESTI INCD (RO); INSTITUTUL NATIONAL DE CERCETARE-DEZVOLTARE PENTRU OPTOELECTRONICA INOE 2000 INCD (RO); INTERNET S.R.L. (RO)

Affiliation: INSTITUTUL NATIONAL DE CERCETARE - DEZVOLTARE PENTRU FIZICA MATERIALELOR BUCURESTI RA (RO)

Project website: http://www.infim.ro/ro/NODE/3960

Abstract:

The primary aim is to obtain novel nanostructured semiconductor materials based on Ge nanoparticles (nps) with optimized properties to be used in photodetectors for the visible and infrared (VIS-NIR) ranges, and also in nonvolatile (NV) memory devices. This aim will be realized in the following objectives: A) Preparation and characterization of nanostructured films based on Ge nps in SiO2, TiO2, HfO2, with optimized photoconductive and electrical properties; B) Preparation and complex characterization of experimental models for VIS-NIR photodetector and NV memory using the optimized materials; C) Fabrication of VIS-NIR photodetector and NV memory to prove experimentally the concepts of the project and its applications; D) Estimation of the economic impact.
Based on the material research (Phase 1), and on the investigations of structures and experimental models (Phase 2), two prototypes will be fabricated in Phase 3, one for the VIS-NIR photodetector, and one for the NV memory, with corresponding technical specifications. Thus, we will prove that the novel nanostructured materials based on Ge nps obtained in this project are suitable for VIS-NIR photodetectors and NV memory devices. Also, the technical and economical analyses documentation and feasibility studies will be performed (Phase 4).
The two devices will be integrated into a system for event identification and an automated test and measurement system for industrial applications and manufacturing devices will be realized.
The results obtained by achieving the project objectives have a high level of originality and novelty. Therefore, the scientific results will be promoted in 5 papers in peer-reviewed journals, and in 7 communications at prestigious international conferences. The technological results will be the object of 3 patent applications.
Young students will be involved in the project, and this will have a formative effect (Master Dissertations and/or PhD theses).

Surface and Interface Science: Physics, chemistry, biology, applications. Call name: Complex Exploratory Research Projects - PCCE-2008 call
PN-II-ID-PCCE-2008-0076 2010 - 2013

Role in this project: Key expert

Coordinating institution: INSATITUTUL NATIONAL DE CERCETARE DEZVOLTARE PENTRU FIZICA MATERIALELOR

Project partners: INSATITUTUL NATIONAL DE CERCETARE DEZVOLTARE PENTRU FIZICA MATERIALELOR (RO); INSTITUTUL NATIONAL DE CERCETARE DEZVOLTARE PENTRU INGINERIE ELECTRICA (RO); UNIVERSITATEA DE MEDICINA SI FARMACIE CAROL DAVILA DIN BUCURESTI (RO); UNIVERSITATEA ALEXANDRU IOAN CUZA DIN IASI (RO); INSTITUTUL NATIONAL DE CERCETARE DEZVOLTARE PENTRU FIZICA TEHNICA DIN IASI (RO); INSTITUTUL NATIONAL DE CERCETARE DEZVOLTARE PENTRU TEHNOLOGII IZOTOPICE SI MOLECULARE DIN CLUJ-NAPOCA (RO); UNIVERSITATEA BABES-BOLYAI DIN CLUJ-NAPOCA (RO); ACADEMIA ROMANA FILIALA TIMISOARA (RO); UNIVERSITATEA DE MEDICINA SI FARMACIE VICTOR BABES TIMISOARA (RO)

Affiliation: INSATITUTUL NATIONAL DE CERCETARE DEZVOLTARE PENTRU FIZICA MATERIALELOR (RO)

Project website: http://www.infim.ro/projects/siinta-suprafetelor-si-interfetelor-fizica-chimie-biologie-aplicatii

Abstract:

This project intends to provide a financial background for developing the community of Surface Science in Romania. Thematics from physics and chemistry of surfaces will be tackled together with applications of surface science in biology and in technology; also new standards will be proposed for consistent data interpretation. The Project clusterizes the most important Romanian teams with preoccupations in surface science, namely all X-ray photoelectron spectroscopy teams with most of the community of thin film deposition, cluster and nanoparticle physics, surface reactivity, surface chemistry and photochemistry, multilayer physics and applications, magnetic fluids, functionalization of surfaces, cell attachment, studies of cellular membrane. The research teams belong to highly prominent Universities and Research Institutes from practically all geographical areas of the country. The Consortium disposes of infrastructure exceeding 10 million euros, of more than one hundreed highly qualified scientists which have generated during the past years more than 3 % of the national scientific visibility. The research will concentrate into four main areas: (i) magnetic properties of surfaces and low-dimensional systems; (ii) electrical properties of surfaces and heterostructures; (iii) surface chemistry; (iv) application of surface science in functionalized systems and in biology, together with (v) an area concentrating on standardization in X-ray photoelectron spectroscopy, Auger electron spectroscopy and related techniques. Each area is divided into several thematics; each thematic has at least one in-charge scientist. This Project will foster the surface science community in Romania and will contribute strongly to the development of high-technological industrial preoccupation in all geographical areas concerned. Several cutting-edge applications are also foreseen by pursuing the fundamental research proposed.

Ge nanocrystals embedded in amorphous matrices with photoconductive properties. Call name: Postdoctoral Research Projects - PD-2011 call
PN-II-RU-PD-2011-3-0094 2011 - 2013

Role in this project: Project coordinator

Coordinating institution: Institutul National de Cercetare Dezvoltare pentru Fizica Materialelor

Project partners: Institutul National de Cercetare Dezvoltare pentru Fizica Materialelor (RO)

Affiliation: Institutul National de Cercetare Dezvoltare pentru Fizica Materialelor (RO)

Project website: http://www.infim.ro/ro/projects/ge-nanocrystals-embedded-amorphous-matrices-photoconductive-properties

Abstract:

Few studies in the literature focused on the (photo)electrical properties of nanocrystalline germanium (nc-Ge) based materials, in contrast with the structural and optical ones. The aim is to prepare and to study nanostructured films consisting of nc-Ge immersed in amorphous matrix with good photoconductive properties. To achieve this goal we propose the following objectives: 1 Preparation of films with different concentrations of nc-Ge embedded in amorphous matrices; 2 Study of electrical properties in correlation with the morphology of layers. Experiment and modelling; 3 Study of photoconductive properties in correlation with morphology of layers. Experiment and modelling; 4 Dissemination of research results. The intended original results are: optimal preparation conditions will be determined to obtain films with improved photoconductive properties; dominant electrical transport mechanism will be proposed and percolation parameters will be calculated; transitions between energy levels evidenced in electrical and photransport phenomena will be identified and corresponding quantum confinement energy levels will be found; films with improved photoconductive properties will be obtained. The dissemination will be made by: 3 scientific reports; 5 articles published in ISI-quoted journals; 3 contributions to prestigious international conferences; project Web page. The aim and objectives frame themselves in the Human Resources programme, Postdoctoral research projects subprogram.

FILE DESCRIPTION	DOCUMENT
List of research grants as project coordinator or partner team leader	Download (69.36 kb) 10/10/2019
Significant R&D projects for enterprises, as project manager
R&D activities in enterprises
Peer-review activity for international programs/projects