BrainMap

Mr. Adrian Bezergheanu

Researcher - UNIVERSITATEA TRANSILVANIA BRASOV

Researcher | Scientific reviewer

Curriculum Vitae (03/10/2019)

Expertise & keywords

Graphene based spintronic structures for sensing applications and signal processing Call name: P 2 - SP 2.1 - Proiect experimental - demonstrativ
PN-III-P2-2.1-PED-2021-3112 2022 - 2024

Role in this project:

Coordinating institution: UNIVERSITATEA TRANSILVANIA BRASOV

Project partners: UNIVERSITATEA TRANSILVANIA BRASOV (RO); INSTITUTUL NATIONAL DE CERCETARE- DEZVOLTARE PENTRU MICROTEHNOLOGIE - IMT BUCURESTI INCD (RO)

Affiliation:

Project website: https://graphenespin.unitbv.ro/

Abstract:

The project scope consists in development and testing of a graphene based spintronic demonstration chip which has the flexibility to be configured for various applications like: magnetic field detection, magnetic nanoparticles detection and demonstration of a two/three terminal device functionality – diode/spin valve transistor. By using magnetic electrodes, e.g. Co, deposited on graphene, one can manipulate not only the charge but also the spin of the electron. Such that, using an innovative setup with nonmagnetic and magnetic electrodes on graphene we propose a demonstration chip on which many applications like described above can be developed. To microfabricate this chip, numerical simulations and experimental activities will be done in order to increase the spin injection/detection efficiency through the optimization of the graphene/electrodes interfaces, the structure of the magnetic layers, the deposition processes and the layout of the chip.

Senzori magnetorezistivi optimizati pentru detecția pe cip a nanoparticulelor magnetice Call name: P 2 - SP 2.1 - Proiect experimental - demonstrativ
PN-III-P2-2.1-PED-2019-3514 2020 - 2022

Role in this project:

Coordinating institution: UNIVERSITATEA TRANSILVANIA BRASOV

Project partners: UNIVERSITATEA TRANSILVANIA BRASOV (RO); INSTITUTUL NATIONAL DE CERCETARE- DEZVOLTARE PENTRU MICROTEHNOLOGIE - IMT BUCURESTI INCD (RO)

Affiliation: UNIVERSITATEA TRANSILVANIA BRASOV (RO)

Project website: http://magsensonchip.unitbv.ro/

Abstract:

The project scope consists in development and testing of a demonstration model with on chip integrated spintronic magnetic sensors, optimized for capture and detection of magnetic nanoparticles (MNPs) in a simple microfluidic cell, the core of a lab on chip device. A main goal related with this scope is to propose a more efficient detection scheme by: (i) choosing the adequate multilayer structure and sensor’s layout and (ii) by exploiting specific properties of spintronic structures related with magnetic domain walls and their dynamics in well-defined magnetic fields. The spintronic sensors, used for this demonstrator, are based on Planar Hall Effect (PHE) in exchange-biased magnetic thin films. The core of our demonstration model is a demonstration chip, which will host 2 identical rows with spintronic sensors, with different geometries on each row. This setup is used to have the pairs “measurement sensor-reference sensor” for each particular geometry that, in turn, will be finally established during the project implementation through micromagnetic simulations and experimental tests. The demonstration model will be tested and validated in laboratory conditions, TRL4, for MNPs detection, fluid flow through microfluidic channels, surface and volume detection of different magnetically labelled biomolecules using both DC magnetometry and AC magnetorelaxometry. Will be tested and validated the detection limit, the methods reliability and signal stability. Through these researches, the project aims to achieve practical and original results with potential market application because of the demanding of new, reliable and cheap techniques for detection of magnetically-labelled biomolecules.

Advanced spin-valve sensors for high accuracy non-contacting DC/AC current measurement applications Call name: P 2 - SP 2.1 - Proiect experimental - demonstrativ
PN-III-P2-2.1-PED-2019-1804 2020 - 2022

Role in this project:

Coordinating institution: INSTITUTUL NATIONAL DE CERCETARE-DEZVOLTARE PENTRU INGINERIE ELECTRICA ICPE - CA BUCURESTI

Project partners: INSTITUTUL NATIONAL DE CERCETARE-DEZVOLTARE PENTRU INGINERIE ELECTRICA ICPE - CA BUCURESTI (RO); UNIVERSITATEA TRANSILVANIA BRASOV (RO)

Affiliation: UNIVERSITATEA TRANSILVANIA BRASOV (RO)

Project website: http://www.icpe-ca.ro/315ped-2020/

Abstract:

The project scope consists in designing, development, testing and validation of a demonstrator that uses the spin-valve magneto-resistive structures for high accuracy non-contacting DC/AC current sensing.

The demonstrator, spin-valve MR sensors, realized by nanotechnology, is a multilayer of type Ta/FL(tFL)/Cu(tCu)/PL(tPL)/FeMn(10 nm)/Ta. Thin films multilayer is deposited by high vacuum sputtering.

The proposed demonstrator brings out innovative aspects and a high degree of novelty in relation to international state of art. The design of demonstrator provides a very high flexibility in building various applications and signal processing.

The main objective of this project is achievement of a demonstrator, based on the spin-valve structures, for non-contacting DC/AC current sensing, TRL4.

Another important objective is the validation of the microfabrication technology used to obtain the spin-valve current sensors. The specific objectives will lead to the main objectives success.

By implementation of the above objectives and taking into account the expertise of the involved scientist, through the published papers, and the research infrastructure of our institutions, we can argue that the project is highly feasible.

The main outcome of the project will be a demonstrator, which incorporates 2 sensors based on spin-valve structures and a “U shape” conductive strip. This “U shape” setup allows differential measurement for non-contacting detection of DC/AC currents. Another important outcome’s the validation of the microfabrication technology used to obtain the spin-valve current sensors. The high vacuum deposition of magnetic stacks for spin-valve sensors will require some special steps of nanotechnology in order to obtain specific magnetic/electric properties.

Some of the preliminary results led us to the concept of this project:

Jenica Neamtu and Marius Volmer, the patent Ro 125187/30-07-2013 “Rotation Magneto-resistive Micro-sensor”.

Microfluidic platform for circulating tumour cells (CTCs) concentration through dielectrophoresis-magnetophoresis and analyzed via broadband dielectric spectroscopy and electrochemical impedance Call name: P 1 - SP 1.2 - Proiecte complexe realizate in consorții CDI
PN-III-P1-1.2-PCCDI-2017-0214 2018 - 2021

Role in this project:

Coordinating institution: UNIVERSITATEA TEHNICĂ "GHEORGHE ASACHI" IAŞI

Project partners: UNIVERSITATEA TEHNICĂ "GHEORGHE ASACHI" IAŞI (RO); INSTITUTUL NATIONAL DE CERCETARE- DEZVOLTARE PENTRU MICROTEHNOLOGIE - IMT BUCURESTI INCD (RO); INSTITUTUL NATIONAL DE CERCETARE-DEZVOLTARE MEDICO-MILITARA „CANTACUZINO” (RO); UNIVERSITATEA TRANSILVANIA BRASOV (RO)

Affiliation: UNIVERSITATEA TRANSILVANIA BRASOV (RO)

Project website: http://www.ucelldetect.ro

Abstract:

The overall objective (GO) of uCellDetect is assuming the development of a microfluidic platform which is to integrate electromanipulation (DEP dielectrophoresis) technologies combined with magnetomanipulation (MPA – magnetophoresis) allowing the improvement of sorting and trapping capacity of circulating tumour cells (CTCs) harvested and purified from surgically excised tumors. Simultaneously with the sorting and trapping, on the basis of CTCs’ specific properties (electrical magnetic, electrochemical and spin), at the level of microfluidic platform the characterization of CTCs through broadband dielectric spectroscopy, electrochemical impedance and spintronic detection will be possible, fact which will ensure the precocious diagnosis, minimally invasive, tumours stabilization, monitoring and assessment of therapeutical interventions. The innovative device which is to be developed within 24 months will represent a fast and cheap technology allowing patients to appeal to an affordable diagnosis technology in comparison with the conventional costly and laborious technologies. The Consortium is encompassing 4 partners (two universities, one nationa R&D center and a revival R&D center) which agreed to share expertise, scientific, human and material resources (R&D infrastructure) grant integral complimentary approaches within the Bionanotechnology domain with immediate application in biomedicine.

Spintronic Structures with Anisotropic Magneto-Resistance (AMR) and Giant Magneto-Resistance (GMR) for Robust Sensing Applications Call name: P 2 - SP 2.1 - Proiect experimental - demonstrativ
PN-III-P2-2.1-PED-2016-0915 2017 - 2018

Role in this project:

Coordinating institution: INSTITUTUL NATIONAL DE CERCETARE-DEZVOLTARE PENTRU INGINERIE ELECTRICA ICPE - CA BUCURESTI

Project partners: INSTITUTUL NATIONAL DE CERCETARE-DEZVOLTARE PENTRU INGINERIE ELECTRICA ICPE - CA BUCURESTI (RO); UNIVERSITATEA TRANSILVANIA BRASOV (RO)

Affiliation: UNIVERSITATEA TRANSILVANIA BRASOV (RO)

Project website: http://www.icpe-ca.ro/proiecte/proiecte-nationale/pn-2016-2020/magsens/magsens.htm

Abstract:

The project scope consists in design, development and achievement a demonstrator based on spintronic structures, to be used for robust sensing solutions. This device is well suited to energy efficient applications. An important scope is the validation of nano-technology for achievement the demonstrator. The proposed device has a multi-chip sensor architecture. 3 spintronic structures will be patterned on chip: a Wheatsone bridge with AMR strips, a Wheatsone bridge with GMR strips and a PHE sensor. The combination, on the same substrate, of 3 types of spintronic sensors gives a new approach and degree of novelty in magnetic sensing and provides a high flexibility in building various applications using a single device. These structures are not internally interconnected, so a maximum flexibility in building applications can be achieved by making suitable external connections. Such approach is new not only at national level but also, after our knowledge, this can bring new contributions to the international level in what concern the spintronic AMR, GMR, PHE structures with good magnetic sensitivity, thermal stability and low field resolution. The specific objectives are: 1. Concept of multi-chip spintronic structures; 2 Layout design of masks and micromagnetic simulations of three spintronic structures with AMR, GMR and PHE; 3 Layout design of complex multi-chip spintronic demonstrator and micromagnetic simulations to improve the sensors geometry; 4 Nano-technological experiments in order to fabricate multi-chip spintronic sensors; 5 Achievement a spintronic demonstrator; 6 Magnetic &electric testing of demonstrator; 7 Laboratory validation of nano-technology for spintronic structures. The structure of the research teams is highly complementary. Good collaboration between ICPE-CA team and UTBv team is strengthen over 15 years of together activity, emphasized in National Projects: CERES, CEEX, Matnantech, PNCDI II, numerous Communications at Int. Conf &ISI Articles.

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