BrainMap

Gabriel Sergiu Macavei

- INSTITUTUL NATIONAL DE CERCETARE DEZVOLTARE PENTRU TEHNOLOGII IZOTOPICE SI MOLECULARE I N C D T I M

Researcher

Web of Science ResearcherID: not public

Expertise & keywords

The optimization of recycled lead for the applications on the automobile battery Call name: P 3 - SP 3.1 - Proiecte de mobilități, România-China (bilaterale)
PN-III-P3-3.1-PM-RO-CN-2018-0183 2018 - 2019

Role in this project: Key expert

Coordinating institution: INSTITUTUL NATIONAL DE CERCETARE DEZVOLTARE PENTRU TEHNOLOGII IZOTOPICE SI MOLECULARE I N C D T I M

Project partners: INSTITUTUL NATIONAL DE CERCETARE DEZVOLTARE PENTRU TEHNOLOGII IZOTOPICE SI MOLECULARE I N C D T I M (RO); Institute of High Energy Physics Chinese Academy of Science, P. R. China (CN)

Affiliation: INSTITUTUL NATIONAL DE CERCETARE DEZVOLTARE PENTRU TEHNOLOGII IZOTOPICE SI MOLECULARE I N C D T I M (RO)

Project website: http://www.itim-cj.ro/bilateral/bm13/

Abstract:

The lead acid battery is a ”living” and the most successful electrochemical power source of all times. After consumption, the recycling of lead is important for the environment, but also for saving natural resources, in accordance with EU Directive 2006. The need for the built a ”society of recycling batteries” using environmentally friendly, low cost and low energy consumption methods remains a problem of the modern world. One of the highly aimed goals of electrochemist consists in the valorification of recycled materials in the environment from which they came from – like new electrodes for renewable batteries.

The aim of this project consists in the efficient optimizating of recycled lead from anodic and cathodic plates of a spent car battery by the incorporation of another oxides using a eco-innovative, low cost and low energy consumption method. The new structural features of the recycled lead will improve renewable battery performances due to the substantially reducing passivation on the surface of the anodic electrode. The most important factor is consists in the manufacturing of new electrodes using PN-III-CEI-BIM-CN recycled materials and the reframing of new product in the environment from which they came from - like optimized electrodes for renewable batteries.

Precise Laparoscopic Extralumenal Detection of Colorectal Tumors using Golden-Platinium coated Tacks and Augmented Sensors Call name: P 2 - SP 2.1 - Proiect experimental - demonstrativ
PN-III-P2-2.1-PED-2016-0783 2017 - 2018

Role in this project: Key expert

Coordinating institution: UNIVERSITATEA DE MEDICINA SI FARMACIE "IULIU HATIEGANU"

Project partners: UNIVERSITATEA DE MEDICINA SI FARMACIE "IULIU HATIEGANU" (RO); INSTITUTUL NATIONAL DE CERCETARE DEZVOLTARE PENTRU TEHNOLOGII IZOTOPICE SI MOLECULARE I N C D T I M (RO)

Affiliation: INSTITUTUL NATIONAL DE CERCETARE DEZVOLTARE PENTRU TEHNOLOGII IZOTOPICE SI MOLECULARE I N C D T I M (RO)

Project website: http://www.itim-cj.ro/pncdi/lapsens/

Abstract:

Introduction. Determining exact location of digestive tumors is crucial in oncologic surgery but lacks precision especially in laparoscopic surgery and for small-sized tumors. Endoscopic tatooing of tumors and syncronous intraoperative endoscopy are the actual methods that pin-point the location of these tumors to surgeons but both have their dissadvantges.

Aim: In the present study we aim to develop and manufacture a new, innovative and highly efficient sensing laparoscopic instrument focused on precise non-invasive extralumenal intraoperative detection of small digestive tumors.

Matherial and method: Proof of concept. Based on previous work of our research team, we aim to design and manufacture a sensing instrument compatible with laparoscopic and robotic-assisted surgery equipped with an induction proximity sensor able to detect customly-modified endoscopic clips available in the standard endoscopic instrumentation. The clips will be coated with noble materials (Platinum-Gold) for enhanced detection senstitivity and adequate biocompatibility and attached endoscopically to the mucosa at the poles of the tumor. The clips should be detected by the sensing instrument when scanned from the serosal surface of the bowel with a minimum through-tissue detection range of 2 cm. Validity and detection accuracy will be evaluated in in-vitro laboratory experiments and in-vivo animal experiments. Foreseeing clinical use, the sensing device will be compatible with conventional sterilisation methods; testing will be performed to evaluate this property.

Results. We expect to be succesful in the functionality of the sensor-tags system at the parameters set by the project’s benchmarks.

Conclusion. Detection of small tumors, so difficult in certain situations in laparoscopic surgery, can be made easier for the surgeons by a simple and efficient detection system independent of the skills and availability of endoscopists, invention that may improve the long-term prognosis of patients.

A novel approach for obtaining lead based electrodes used in automotive batteries Call name: P 2 - SP 2.1 - Proiect experimental - demonstrativ
PN-III-P2-2.1-PED-2016-1069 2017 - 2018

Role in this project: Key expert

Coordinating institution: INSTITUTUL NATIONAL DE CERCETARE DEZVOLTARE PENTRU TEHNOLOGII IZOTOPICE SI MOLECULARE I N C D T I M

Project partners: INSTITUTUL NATIONAL DE CERCETARE DEZVOLTARE PENTRU TEHNOLOGII IZOTOPICE SI MOLECULARE I N C D T I M (RO)

Affiliation: INSTITUTUL NATIONAL DE CERCETARE DEZVOLTARE PENTRU TEHNOLOGII IZOTOPICE SI MOLECULARE I N C D T I M (RO)

Project website: http://www.itim-cj.ro/pncdi/ntrodes/

Abstract:

Abstract: Batteries are essential in modern society as an excellent source of mobile energy. Almost 95% of the materials in a lead-acid battery are recyclable. Since the positive electrode and negative electrode active materials are composed of PbO2/PbSO4 and Pb/PbSO4, lead is the most important raw material of lead acid batteries. UE Directives have as aim higher rate of recycling and improvement of the batteries performance. The problems concerning the lead recycling from spent car batteries can be summarized as follows: i) the reduction of pollutions and energy consumption, ii) the reduction of energy and time used to convert oxides and sulfates into metal which is subsequently reconverted to oxides, iii) ineffective desulphurization, iv) low solubility of lead compounds in solvents. The specific topic is based on a new approach regarding Recycling of Electrodes of the Car Batteries as new sources of alternative energies. The author recently developed electrode glasses based on Pb-PbO2 and Pb-PbO2-PbSO4. In this sense, efforts will be made to create the complex packaging: i) to recycle electrodes of the car batteries by an eco-innovative technology and ii) to integrate recycled products as electrodes in the construction of new rechargeable batteries. Performances expected will consist of: 1) synthesize of materials; 2) optimize of performances; (3) fabricate batteries; (4) compare the batteries performance (5) report results in peer-reviewed journal.

High magnetic flux density sintered magnetic cores produced from pseudo core-shell/core-shell powders for medium to high frequencies applications Call name: P 2 - SP 2.1 - Proiect experimental - demonstrativ
PN-III-P2-2.1-PED-2016-1816 2017 - 2018

Role in this project:

Coordinating institution: UNIVERSITATEA TEHNICA DIN CLUJ - NAPOCA

Project partners: UNIVERSITATEA TEHNICA DIN CLUJ - NAPOCA (RO); INSTITUTUL NATIONAL DE CERCETARE DEZVOLTARE PENTRU TEHNOLOGII IZOTOPICE SI MOLECULARE I N C D T I M (RO)

Affiliation: INSTITUTUL NATIONAL DE CERCETARE DEZVOLTARE PENTRU TEHNOLOGII IZOTOPICE SI MOLECULARE I N C D T I M (RO)

Project website: http://www.sim.utcluj.ro/contracte/PN-III-P2-2.1-PED-2016-1816/

Abstract:

Soft magnetic composite materials of ferrite/alloy type comes to complete the uncovered range of applications by the classical magnetic alloys: Fe based and Ni based magnetic alloys, magnetic ferrites, i.e. medium and high frequencies applications that needs a high magnetic density. The project has as starting point a project coordinator patent pending, related to pseudo-core shell powder of Fe@NiFe2O4 type and its synthesis procedure. The main goal of the project is to elaborate a laboratory technology and obtaining an experimental model of sintered magnetic core with imposed functional characteristics, obtained by spark plasma sintering of pseudo core-shell/core-shell powder elaborated in the project. The pseudo core-shell powder are formed by large Fe particles that are covered by thin layer of nanometric soft magnetic ferrite particles. The pseudo core-shell powder will be obtained according to the patent pending (mixture of large Fe particles covered by ferrite nanoparticles + heat treatments) and the core-shell powder will be obtained by chemical method. By spark plasma sintering will be synthesized composite compacts having a structure of large ferromagnetic particles (high magnetic density) covered by a layer of ferrites, which will determinate high electrical resistivity of the magnetic core and low magnetic losses by eddy currents. The correlation between the magnetic and electrical characteristics as a function of pseudo-core shell powder characteristics and spark plasma sintering parameters for optimising the process. At the end, among the best composite magnetic material obtained will be realise an experimental model of magnetic core with imposed functional characteristics and will be elaborate the documentation for the laboratory technology for obtaining magnetic cores. The composite magnetic cores elaborated in this way could be used in medium and high frequencies having superior magnetic characteristics as compared to the ferrites.

High temperature, high stability, low cost evaporation cells for molecular beam epitaxy Call name: Joint Applied Research Projects - PCCA-2011 call, Type 2
PN-II-PT-PCCA-2011-3.2-0767 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 TEHNOLOGII IZOTOPICE SI MOLECULARE I N C D T I M (RO); BRAVA 2000 S.R.L. (RO)

Affiliation: INSTITUTUL NATIONAL DE CERCETARE DEZVOLTARE PENTRU TEHNOLOGII IZOTOPICE SI MOLECULARE I N C D T I M (RO)

Project website: http://www.infim.ro/projects/celule-de-evaporare-la-temperaturi-mari-stabilitate-ridicata-si-cost-redus-pentru-depuneri

Abstract:

Evaporation cells based on a new heating principle will be designed, fabricated and tested. This heating principle is based on direct resistive heating of two concentric tubes made on a refractory metal (Ta, Mo, W), with thin walls (0.1-0.2 mm), subject to a high electrical current (60-100 A). The inner pipe contains the material to be evaporated. The outer pipe, which also warms up, acts at the same time as a thermal screen for the inner pipe: as a consequence, higher temperatures are achieved in the inner part and also a higher amount of power is dissipated inside the inner pipe. The warming up to very high temperatures (over 2000 C) proceeds in a few tens of seconds, to be compared with several tens of minutes in standard evaporation cells where a crucible is warmed by using a W filament. Also, a precise temperature calibration may be obtained as function of the heating current only, whereas in conventional cells thermocouples are used. These thermocouples require additional vacuum current feedthroughs and also their thermal contact to the crucible may be problematic. A third advantage of the new principle is its relative low cost, based on the fact that the only expensive parts are the refractory material pipes. A new concept (dismountable assembly) will be developed also for the water cooling of the cell, whereas a single high current vacuum feedthrough is sufficient. One anticipates easy and fast manufacture of such devices, resulting in low delivery terms, as compared with 3-6 months for the actual evaporators. The estimated market is of some 500-1000 units in the European Community, whereas the stipulated benefit is of 5000 Euro per unit. The project will (i) implement the new heating principle; (ii) implement the new water cooling principle; (iii) achieve accuracte temperature calibration; (iv) demonstrate the ability to evaporate at high temperature, especially of metals that are usually evaporated by electron bombardment: Ti, Cr, V, Zr, Nb.

Core-shell composite nanoparticles based on Fe and Pt having adjustable magnetic, dispersive and functional properties Call name: Exploratory Research Projects - PCE-2011 call
PN-II-ID-PCE-2011-3-0876 2011 - 2016

Role in this project: Key expert

Coordinating institution: Institutul National de Cercetare–Dezvoltare pentru Tehnologii Izotopice si Moleculare

Project partners: Institutul National de Cercetare–Dezvoltare pentru Tehnologii Izotopice si Moleculare (RO)

Affiliation: Institutul National de Cercetare–Dezvoltare pentru Tehnologii Izotopice si Moleculare (RO)

Project website: http://www.itim-cj.ro/PNCDI/idei119/index_en.htm

Abstract:

In this project we are focused on synthesis and characterization of various core-shell or multi-shell nanoparticles based on Fe, Pt, conjugate polymers and silica or titania components.

General objective: Synthesis, characterization and applications of various types of Fe and Pt based nanoparticles with adjustable properties involving magnetic, dispersive and functional characteristics. Specific objectives: 1. Synthesis, structural and compositional characterization of multi-shell Fe@FePtL10@Pt nanoparticles; 2. Magnetic characterizations of Fe@FePtL10@Pt nanoparticles; adjustment of the coercive magnetic field based on synthesis – properties relationship; 3. Synthesis, structural and compositional characterization of multi-shell FePtL10@PPy and/or FePtL10@P3HT hybrid nanoparticles; 4. Magnetic characterizations and saturation magnetization adjustment by use of a suitable choice of polymer shells; 5. Synthesis, structural and compositional characterization of multi-shell FePtL10@SiO2 and/or FePtL10@TiO2 core-shell composite nanoparticles; 6. Magnetic characterization dispersion adjustment of FePtL10@SiO2 and/or FePtL10@TiO2 nanoparticles; 7. Hyperthermia tests with various Fe@FePtL10@Pt nanoparticles, having different FePtL10 intermediate shells, dispersed in water based solutions and gels; 8. Functionalization of Fe@FePtL10@Pt, FePtL10@PPy (P2HT) and FePtL10@SiO2 (TiO2) nanopatricles in view of magnetically molecular separation and uptake tests from water based solutions.

Novel organocatalytic magnetic core-shell nanoparticles and their application Call name: Projects for Young Research Teams - TE-2011 call
PN-II-RU-TE-2011-3-0130 2011 - 2014

Role in this project:

Coordinating institution: Institutul National de Cercetare Dezvoltare pentru Tehnologii Izotopice si Moleculare

Project partners: Institutul National de Cercetare Dezvoltare pentru Tehnologii Izotopice si Moleculare (RO)

Affiliation: Institutul National de Cercetare Dezvoltare pentru Tehnologii Izotopice si Moleculare (RO)

Project website: http://itim-cj.ro/PNCDI/ru100/

Abstract:

The project aim is to create a new generation of organocatalytic magnetic core-shell nanoparticles as a recyclable organocatalyst with a great applicative potential, by combining an inorganic magnetic core and an organic polymer coating functionalized by a catalytic moiety. The project focused on a new and complex research field, nanosciences and nanotechnologies, situated in the actual orientation for the development of functional nanostructured materials from the molecular scale to devices for applications by controlling physical and chemical processes and methods. In order to target the project main objective magnetic core-shell nanoparticles having organocatalytic moieties covalently linked with high organocatalytic performance will be prepare. The advantage of this magnetic organocatalyst over the classical catalysts, consist in an easy removal from reaction media due to the magnetic separation. This methodology saves resources, reduces wastes and toxic hazards and thus contributes to the sustainable development. Such magnetic material also attract fundamental interest by contributing to the understanding of physical processes and phenomena associated with nanostructures, intermolecular specific interactions, interface effects, phase transitions and applicative interest for organocatalysis.

DOPING AND SIZE EFFECTS ON THE MAGNETIC, STRUCTURAL AND MORPHOLOGICAL PROPERTIES AND SPIN DYNAMICS IN MICRO AND NANOSTRUCTURED FERROMAGNETIC OXIDES. Call name: Complex Exploratory Research Projects - PCCE-2008 call
PN-II-ID-PCCE-2008-0106 2010 - 2013

Role in this project:

Coordinating institution: Universitatea Tehnica din Cluj Napoca

Project partners: Universitatea Tehnica din Cluj Napoca (RO); Institutul National de Cercetare Dezvoltare pentru Tehnologii Izotopice si Moleculare-INCDTIM-Cluj Napoca (RO); Institutul National de Cercetare Dezvoltare pentru Fizica Tehnica-INCDFT-Iasi (RO); Institutul National pentru Fizica Materialelor-INCDFM-Bucuresti (RO); INSTITUTUL NATIONAL DE CERCETARE-DEZVOLTARE PENTRU METALE NEFEROASE SI RARE (RO); Universitatea Politehnica din Bucuresti (RO)

Affiliation: Institutul National de Cercetare Dezvoltare pentru Tehnologii Izotopice si Moleculare-INCDTIM-Cluj Napoca (RO)

Project website: http://c4s.utcluj.ro/Current%20projects%20-PNII.html

Abstract:

Diluted magnetic oxides (DMO) are expected to play an important role in interdisciplinary materials science and future electronics because charge and spin degree of freedom coexist into single material. The control of the high temperature ferromagnetism and of the spin and charge transport in DMO micro- and nanostructures represent a necessary condition for the achievement and miniaturization of spintronic devices which could operate at and above the ambient temperature. The project involves a competitive and complementary partnership between 2 Technical Universities and 4 National R&D Institutes and has the main goal to obtain top research results based on the experimental and theoretical researches which will be performed on micro- and nanostructured semiconducting ferromagnetic oxide systems synthesized by innovating methods. By means of that, it will be answered to the still controversial problems in the fundamental research referring to the effects induced by the low dimensionality, magnetic ions doping degree and by the synthesis methods on the propitious characteristics necessarily to get the high temperature ferromagnetism in II-VI oxide semiconductors.

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