BrainMap

Maria Poienar

- UNIVERSITATEA DE VEST TIMISOARA

Researcher

Curriculum Vitae (10/04/2024)

Expertise & keywords

Advanced Technologies for High Selectivity Detection of Organophosphate - Nerve Agent Simulants in Societal Security Applications Call name: P 2 - SP 2.1 - Proiect experimental - demonstrativ
PN-III-P2-2.1-PED-2021-0106 2022 - 2024

Role in this project: Key expert

Coordinating institution: INSTITUTUL NATIONAL DE CERCETARE-DEZVOLTARE PENTRU ELECTROCHIMIE SI MATERIE CONDENSATA - INCEMC TIMISOARA

Project partners: INSTITUTUL NATIONAL DE CERCETARE-DEZVOLTARE PENTRU ELECTROCHIMIE SI MATERIE CONDENSATA - INCEMC TIMISOARA (RO); INSTITUTUL NATIONAL DE CERCETARE- DEZVOLTARE PENTRU MICROTEHNOLOGIE - IMT BUCURESTI INCD (RO)

Affiliation:

Project website: https://incemc.ro/PS/WAsSENS/index.html

Abstract:

In recent years, terrorist attacks primary based on releasing explosives and chemical warfare agents in the public happened frequently which makes it imminent to develop chemical sensors for the high selective and sensitive detection of warfare agents (WAs). Chemical warfare agents include blood agents, blister agents, and nerve agents including sarin and VX. Considering sarin’s gas high toxicity, DMMP (dimethyl methylphosphonate), an organophosphorus compound, is widely used as its simulant in the laboratory because of its similar chemical structure and much lower toxicity. Because the use of chemical warfare agents are impossible to predict or prevent, is required to design and synthesized of novel and improved materials that allow developing of more fast sensing systems with high selectivity, low-cost and on-site portable. Perovskite materials with outstanding properties have become significant candidates for developing platforms of the detection of toxic agents. Thus, the aim of the WAsSens project is development and testing a technology validated in the laboratory namely, a SH-SAW sensor, using undoped and Co or Sn doped ABO3 perovskite ceramics materials (A = Y; B = Mn) , obtained through low cost and environmentally friendly processes. To achieve the aim of the project, the overall objectives are: (i) Obtaining of perovskite structure through sustainable and green processes; (ii) Deposition of perovskite materials on quartz substrate in order to achieve thin films; (iii) Design, achievement and testing of SH-SAW sensor used for selective detection of the sarin gas simulant - DMMP; (iv) Dissemination of the research results. Project outcomes will materialize by advanced synthesis technologies, production processes and innovative products, and also in creating mechanism for implementation of scientific results in production. The expected outcomes will consist of innovative technologies and demonstrative models, in order to validate the proof of concept (TLR).

Emergent functionalities and orbital selectivity in correlated materials with metal to insulator transitions Call name: P 1 - SP 1.1 - Proiecte de cercetare pentru stimularea tinerelor echipe independente
PN-III-P1-1.1-TE-2019-1767 2020 - 2022

Role in this project: Key expert

Coordinating institution: UNIVERSITATEA "ŞTEFAN CEL MARE" DIN SUCEAVA

Project partners: UNIVERSITATEA "ŞTEFAN CEL MARE" DIN SUCEAVA (RO)

Affiliation:

Project website: http://www.silvic.usv.ro/efosmit

Abstract:

This project involves a hybrid computational and experimental research effort in order to advance our current understanding of metal to insulator transitions in correlated materials with perovskite crystal structures. In particular, we are interested in the role played by novel states of matter such as Mott orbital-selective states (defined as the coexistence of metallic and Mott insulating orbitals within the same electronic state), to the finite temperature electronic-structural interplay across the Mott metal to insulator transition. In addition, we are also interested in the effects of hole doping on the orbital selective states and the electronic-structural interplay. The project is built upon the synergy of the state-of-the-art ab-initio methods and x-ray and neutron scattering techniques together with physical measurements. This study is possible due to the recent integration of forces for structural relaxation, in the Density Functional Theory with Embedded Dynamical Mean Field Theory (DFT+eDMFT). Based on the extensive experience of the team with the quantitative predictive power of the DFT+eDMFT method, materials with perovskite crystal structures will be screened, in order to find candidates with desirable properties that will become targets for in-depth theoretical and experimental study. The specific research objectives of the project include (I) a better understanding of the mechanisms responsible for the Mott metal to insulator transition, (II) finding emergent novel states characterized by the coexistence of insulating, semi-metallic and metallic orbitals, (III) understanding the effects of doping and predicting new phase transitions, (IV) experimental validation of the theoretical results by scattering techniques and physical measurements. The purpose of these studies is to achieve improved properties and design new multifunctional materials for applications in memory devices.

Composites of natural materials and hydroxyapatite for enhanced biomass growth in biofilters Call name: P 1 - SP 1.1 - Proiecte de cercetare pentru stimularea tinerelor echipe independente
PN-III-P1-1.1-TE-2019-2116 2020 - 2022

Role in this project: Key expert

Coordinating institution: INSTITUTUL NATIONAL DE CERCETARE-DEZVOLTARE PENTRU ELECTROCHIMIE SI MATERIE CONDENSATA - INCEMC TIMISOARA

Project partners: INSTITUTUL NATIONAL DE CERCETARE-DEZVOLTARE PENTRU ELECTROCHIMIE SI MATERIE CONDENSATA - INCEMC TIMISOARA (RO)

Affiliation: INSTITUTUL NATIONAL DE CERCETARE-DEZVOLTARE PENTRU ELECTROCHIMIE SI MATERIE CONDENSATA - INCEMC TIMISOARA (RO)

Project website: http://bioreactoare-scoici.incemc.ro

Abstract:

Quality drinking water is a desire of the modern world and therefore the purpose of extensive research. Chlorination is the last step in the treatment of drinking water, leading to a disinfected, quality product. The positive effect of disinfection is unfortunately doubled by the formation of reaction by-products (DBPs) that are often carcinogenic and harmful. A solution for reducing the amount of DBP is represented by the decrease in the concentration of dissolved organic carbon, which leads to a lower concentration of chlorinated carcinogenic compounds in drinking water. The use of biofiltration before chlorination is a solution both for reducing the concentration of carcinogenic chlorinated compounds and for adsorption/absorption of pesticides from water and heavy metal ions, depending on the biofilter construction.

A major problem of biofilters is their sensitivity to environmental factors such as water temperature and composition, the slow rate of development of the bacterial biofilm that consumes dissolved organic compounds (COD), and the relatively low flow of purified water.

In this project, with a multidisciplinary team, young and experienced, we propose the synthesis of a new type of substrate for biofilters. It is based on natural materials such as shells that have a large specific surface area, modified with hydroxyapatite to increase the growth rate of the biofilm due to the phosphorus contribution. Due to the special two-dimensional shape of the shells, their superstructure at the microscopic level and the open pores, the constructed biofilters will have a low-pressure drop. Furthermore, the value of the empty bed contact time (EBCT) parameter will be strongly increased compared to the substrates currently used, increasing the efficiency of biofiltration.

A new approach to the development of a sensor for selective monitoring of harmful gases using low-cost and eco-friendly materials Call name: P 2 - SP 2.1 - Proiect experimental - demonstrativ
PN-III-P2-2.1-PED-2016-0406 2017 - 2018

Role in this project: Key expert

Coordinating institution: INSTITUTUL NATIONAL DE CERCETARE-DEZVOLTARE PENTRU ELECTROCHIMIE SI MATERIE CONDENSATA - INCEMC TIMISOARA

Project partners: INSTITUTUL NATIONAL DE CERCETARE-DEZVOLTARE PENTRU ELECTROCHIMIE SI MATERIE CONDENSATA - INCEMC TIMISOARA (RO); ECONIRV SRL (RO)

Affiliation: INSTITUTUL NATIONAL DE CERCETARE-DEZVOLTARE PENTRU ELECTROCHIMIE SI MATERIE CONDENSATA - INCEMC TIMISOARA (RO)

Project website: http://www.icmct.ro/ecosaw/

Abstract:

Increase of pollution degree due to inefficient or too little measures regarding gases emissions resulted behind some industrial activities and rolling stock increasing at global level it takes measures towards noxious effects detection and limitation on people health and environment.

Sensors made of inorganic materials are the most commonly used, especially ceramics. One reason is that many sensors are used in very severe conditions such as high temperature, reactive or corrosive atmosphere and high humidity, and ceramics are most reliable materials in these conditions. Thus, the aim of the EcoSaw project is development and testing an demonstrative experimental model, namely, a SAW sensor, using undoped and Pd or Ca doped ABO3 perovskite materials (A = La and B = Mn) , obtained through low cost and environmentally friendly processes.

To achieve the aim of the project, the overall objectives are:

(i) Obtaining of undoped and Pd and Ca doped LaMnO3 perovskite structure through sustainable and green processes; (ii) Deposition (using different methods) of perovskite materials on quartz substrate in order to achieve thin films; (iii) Design, achievement and testing of SAW sensor used for selective detection of toxic gases (CO or H2S ); (iv) Dissemination of the research results will materialize through high impact international publications, participation at national and international conferences, patents.

Project outcomes will materialize by advanced synthesis technologies, production processes and innovative products, and also in creating mechanism for implementation of scientific results in production. The expected outcomes will consist of innovative technologies and demonstrative models.

Improved multifunctional crednerite type oxides: from magnetism to catalysis Call name: Projects for Young Research Teams - RUTE -2014 call
PN-II-RU-TE-2014-4-2179 2015 - 2017

Role in this project: Project coordinator

Coordinating institution: INSTITUTUL NATIONAL DE CERCETARE-DEZVOLTARE PENTRU ELECTROCHIMIE SI MATERIE CONDENSATA - INCEMC TIMISOARA

Project partners: INSTITUTUL NATIONAL DE CERCETARE-DEZVOLTARE PENTRU ELECTROCHIMIE SI MATERIE CONDENSATA - INCEMC TIMISOARA (RO)

Affiliation: INSTITUTUL NATIONAL DE CERCETARE-DEZVOLTARE PENTRU ELECTROCHIMIE SI MATERIE CONDENSATA - INCEMC TIMISOARA (RO)

Project website: http://cremm.icmct.ro/

Abstract:

Layered 3d metal ABO2 oxides have recently attracted a lot of interest due to their variety of properties. Continued efforts are made to study such transition metal oxides ABO2 especially for oxygen insertion, essential in many applications, such as energy conversion, oxygen sensing or oxygen storage. Among these multifunctional materials, the crednerite Cu1+xMn1-xO2 solid solution presents rich physics and promising applications. Considering its complexity, the aim of this project is to give more information about the impurity effects (oxygen excess/nonstoichiometry, substitution with nonmagnetic elements) upon the relationship structures/properties in these materials. Our study will be a step forward in understanding the stability of these materials and even a possibility of tuning their properties.

Advanced research regarding development of fast method and techniques for pesticides detection from food chain Call name: Joint Applied Research Projects - PCCA 2013 - call
PN-II-PT-PCCA-2013-4-0826 2014 - 2017

Role in this project: Key expert

Coordinating institution: INSTITUTUL NATIONAL DE CERCETARE-DEZVOLTARE PENTRU ELECTROCHIMIE SI MATERIE CONDENSATA - INCEMC TIMISOARA

Affiliation: INSTITUTUL NATIONAL DE CERCETARE-DEZVOLTARE PENTRU ELECTROCHIMIE SI MATERIE CONDENSATA - INCEMC TIMISOARA (RO)

Project website: http://pesti-senz.icmct.ro

Abstract:

Pesticide pollution of the environment is an actual acute problem, with expansion on a global scale and tends to rise. These contaminants are released into the air, water and soil from where are taken by organisms. By ingestion, organophosphorus pesticides get in human and animal body where they cause serious diseases such as irreversible damage to the immune system, cancer, genetic disorders. For the safety and security of the population, devices and advanced techniques for pollutants detection and monitoring in food and agriculture, are necessary.

The project PESTI-SENZ meets these needs and proposes the development of micro-biosensors based on lead-free piezoelectric materials, undoped and doped with different ions (Na, K, Bi, Zr) with selective properties and high sensitivity for the detection and monitoring of pesticides in agriculture and food.

Piezoelectric biosensors are being increasingly investigated because such devices allow direct label-free biological detection by monitoring target molecules in real time.

Detecting and tracking the compound of interest is very important in order to study the function and behavior of biological systems. In this sense, the purpose of PESTI-SENZ project is to get the environment friendly piezoelectric materials (lead free) and deposited to different substrates in order to be used to build FBAR-type piezoelectric arrays microsensor, functionalized with sensitive biomolecules for detection of organophosphorus compounds in aqueous media.

The main objective of the project is films and membranes obtaining based on piezoceramic materials free lead, in order to make devices for analysis and detection of biochemical compounds using innovative laboratory processes and technologies. The specific objectives of the project will pursue solving important theoretical and experimental issues which will contribute to the development of micro-sensors devices which incorporates demonstrator device based on new nanocrystalline piezoceramic with similar characteristics like PZT, and will provide guarantee of a safe exploitation environment.

Methodologies, materials and techniques used in project take into consideration requirements and international standards regarding environmental protection, avoiding the potential damage of property, natural resources, research staff and population health.

The project research team aims to merge skills and complementary expertise of consortium partners, to develop innovative technologies to achieve high efficiency for a sensing device with global applications.

The original aspects of the project, partners expertise combined to achieve a specific aim correlated with the current needs of modern society, provides the foundation for national research network consisting of multidisciplinary teams capable to collaborate synergic and complementary to exploit the extensive research results designed to lead to the realization of a device to ensure safe operation without adverse effects on human health.

Also we propose that the scientific and technical results that we obtain to bring added value to national and international scientific and, as well economic value at least at the national level in the first stage.

Scientific and technical activities carried out within the project by the consortium members will be widely disseminated among national and international scientific community through scientific papers, participation in specialized scientific conferences, patents, presentations at meetings of business people.

Influence of temperature and high pressure on the structural and physical properties in Fe-based Charge Order systems Call name: Joint Research Projects Romania-France - IDROFR-2011 call
PN-II-ID-JRP-RO-FR-2011-2-0056 2011 -

Role in this project: Project coordinator

Coordinating institution: INSTITUTUL NATIONAL DE CERCETARE – DEZVOLTARE PENTRU ELECTROCHIMIE SI MATERIE CONDENSATA TIMISOARA

Project partners: INSTITUTUL NATIONAL DE CERCETARE – DEZVOLTARE PENTRU ELECTROCHIMIE SI MATERIE CONDENSATA TIMISOARA (RO); Laboratoire de Cristallographie et Sciences des Matériaux UMR CNRS 6508 (FR)

Affiliation: INSTITUTUL NATIONAL DE CERCETARE – DEZVOLTARE PENTRU ELECTROCHIMIE SI MATERIE CONDENSATA TIMISOARA (RO)

Project website:

Abstract:

This project deals with the preparation and the study of iron based oxides (in form of poly- and single-crystals) presenting charge ordering, combining the +2 and +3 iron oxidation states. Indeed, charge ordering in transition metal oxides is a fundamental parameter for obtaining original magnetic and/or electric properties. That was largely shown within the framework of the studies on colossal magneto-resistance in manganese perovskites and it again seems at the origin of the ferroelectricity in CaMn7O12 or LuFe2O4.

Our project breaks up into several sections:

- We chose to revisit the systems of “iron borates and phosphates” presenting iron mixed valences on the basis of literature and of our experience of solid state chemists in this field, to highlight unusual properties (in which multiferroicity).

- The second research orientation is more creative and relates to the exploration of new systems, always on a “Fe, P, B, O” basis, to obtain new compounds of which we will characterize the structures and the properties.

- The (structural and properties) evolution of materials will be followed versus temperature, magnetic field and also high pressure. Not only this last factor allows obtaining new phase diagrams, but it can lead to the stabilization of new crystalline “buildings”, and thus to new properties. This effect was already illustrated in a convincing way in the case of charge order compounds, with the appearance of an irreversible structural transition in LuFe2O4. A broad panel of techniques of laboratory and large scale facilities will be implemented for the most detailed and complete possible description of the structural, micro structural and physical properties of our materials.

- The purpose of this crystallo-chemistry work of is to establish relationships between the structures and the (magnetic and electric) properties of our compounds. This has as much interest from the fundamental point of view as for the optimization of the properties for potential applications.

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