Programul PN II- IDEI - PCE 2007
Controlul stabilitatii si reactivitatii materialelor multifunctionale micro si nanostructurate pe baza unei abordari complexe termodinamice
(Acronim: TERMOMAT)

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Abstract      |      Obiective si Activitati      |       Rezultate       |       Adrese utile
 
REZULTATE 2007
  • Organizarea activitatii in cadrul proiectului tinand seama de complexitatea temei;
  • Raport stiintific complet din literatura privind materialele oxidice ce urmeaza sa fie caracterizate;
  • Stabilirea conditiilor experimentale de studiu privind abordarea complexa a corelatiei compozitie/structura/ proprietati termodinamice: definirea parametrilor de lucru specifici si elaborarea unui plan de lucru adecvat.
  • Optimizarea sistemului de lucru experimental in scopul obtinerii proprietatilor termodinamice in conditii controlate: adaptarea instalatiilor existente pentru caracterizarea noilor materiale si realizarea unor celule de lucru noi.
  • Efectuarea masuratorilor preliminare de verificare privind termodinamica unor compusi cu potential magnetorezistiv din sistemul La-Mn-O
  • Primirea in cadrul programului de doctorat cu frecventa a unui tinar care urmeaza sa lucreze in cadrul echipei proiectului
  • Elaborarea de lucrari stiintifice in tematica proiectului.


A. Lucrari ISI publicate in tematica grantului:

1. S. Tanasescu, F. Teodorescu, F. Maxim, L.Giurgiu, The influence of particle size and composition on the thermodynamic, properties and spin dynamics of perovskite type materials,  J. Nanoscience and Nanotechnology, sub tipar

B. Participari la manifestari stiintifice internationale si nationale:

1.        S. Tanasescu, C. Marinescu, F. Teodorescu, "The control of the energetic parameters: important step in understanding the stability and reactivity of the micro and nanostructured materials", Preprints of the International Conference on Nanomed. September 9 -11, 2007, Chalkidiki, Greece, p.232-233.
2.        S. Tanasescu, "Energetics of the nanomaterials used in nanomedicine", Drug Delivery WP, General Assembly of ETP Nanomedicine 12-13 Sept. 2007 Chalkidiki, Greece
3.        S. Tanasescu, F. Maxim, F. Teodorescu, C. Marinescu, "The Characterization of Micro- and Nanostructured Multifunctional Oxide Systems Based on a Complex Thermodynamic Approach", Prezentare la EUROMAT 2007, 10-13 Sept, Nurenberg, Germany
4.        F. Maxim, P. Ferreira, P.M. Vilarinho, "The influence of structure and morphology of Ti precursor on hydrothermal synthesis of BaTiO3 nanoparticles", EUROMAT 2007, 10-13 Sep. 2007, Neurenberg, Germany.
5.        S. Tanasescu, C. Marinescu, F. Teodorescu, A. Sofronia, "Effects controlling thermodynamics in micro and nanostructured conducting transition metal oxide systems", Workshop and Meeting of the Associated Phase Diagram and Thermodynamics Committee, 28-30 Sept. 2007
6.        L. Giurgiu, M.N. Grecu, Al. Darabont, A. Popa, D. Toloman, O. Raita, S. Tanasescu, V.V. Grecu, S. Hoffman, M.D. Glinchuk, G. Papavassiliou, M. Fardis, "EPR comparison of the spin dynamics in nanoparticles, nanowires and bulk colossal magnetoresistive manganites", Procc. International Semiconductor Conference, CAS-2007, p.20, Sinaia, 15-17 octombrie 2007.

7.        S. Tanasescu, "The Laboratory of Chemical Thermodynamics: contribution to characterize and investigate from the energetic point of view the advanced materials involved in the complex modern systems and the new technologies", prezentare sub forma de poster la SALONUL CERCETARII, 4-5 oct. 2007, Bucuresti, Romania

REZULTATE 2008

  • Sinteza a  doua seturi de compusi din sistemele La-Ca(Sr)-Mn-O, La-Ca-Mn-Al(Fe)-O prin utilizarea metodei conventionale in stare solida si prin metoda sol-gel si caracterizarea structurala a compusilor sintetizati

  • Obtinerea in situ a unor compozitii noi, micro si nanostructurate, prin variatia stoichiometriei oxigenului din sistemele La-Ca-Mn-O si La-Ca-Mn-Al-O si caracterizarea structurala si morfologica a compusilor obtinuti
  • Obtinerea pe cale experimentala a marimilor termodinamice ale compusilor din sistemele analizate
  • Studiul corelatiilor dintre proprietatile termodinamice si natura si concentratia substituentilor, ca si a corelatiei dintre proprietatile termodinamice si dimensiunea particulelor
  • Investigarea unor compozitii noi nestoichiometrice obtinute in situ si studiul corelatiei dintre proprietatile termodinamice si nestoichiometria oxigenului in compusii nestoichiometrici obtinuti
  • Stabilirea unor criterii de selectie a materialelor investigate in vederea unor aplicatii specifice
  • Elaborarea de lucrari stiintifice in tematica proiectului.
  • Conectarea la platforme europene de cercetare
  • Optimizarea sistemului de lucru experimental prin achizitionarea unui potentiostat-galvanostat performant
  • Comunicari aprobate si sustinute la conferinte de specialitate
  • Organizarea unei manifestari stiintifice in vederea diseminarii rezultatelor proiectului

¨Lucrari publicate si in curs de publicare

  • Speranta Tanasescu, Florentina Maxim, Florina Teodorescu, Liviu Giurgiu, “The Influence of Composition and Particle Size on Spin Dynamics and Thermodynamic Properties of some Magnetoresistive Perovskites”, Journal for Nanoscience and Nanotechnology, 8, 914–923 (2008)
  1. Speranta Tanasescu, Maria Nicoleta Grecu, Cornelia Marinescu, Liviu Mihail Giurgiu, Horia Chiriac, Maria Urse, Effects of dopants and oxygen nonstoichiometry on the thermodynamic, magnetic and electrical properties of micro- and nanostructured perovskite-type materials, Advances in Applied Ceramics: Structural, Functional and Bioceramics, 108, 273-279, 2009.
  • Speranta Tanasescu, Cornelia Marinescu, Florina Teodorescu, Anca Sofronia, The Control of the Energetic Parameters: Important Step in Understanding the Stability and Reactivity of Micro and Nanostructured Materials, World Journal of Engineering, 5, 738-739, 2008.
  • Cornelia Marinescu, Florina Teodorescu, Speranta Tanasescu, Comparative thermodynamic study of some doped micro- and nano- structured lanthanum manganites, Proceedings of the EMCC5 Conf. (5th Chemical Engineering Conference for Collaborative Research in Eastern Mediterranean Countries), Cetraro, Italia, 24-29 mai 2008, p. 197-200.
  1. Florina Teodorescu, Cornelia Marinescu, Ancuta Sofronia, Speranta Tanasescu, The influence of the nonstoichiometry on the thermodynamic properties of lanthanum doped manganites, Proceedings of the EMCC5 Conf. (5th Chemical Engineering Conference for Collaborative Research in Eastern Mediterranean Countries), Cetraro, Italia, 24-29 mai 2008, pag. 201-204.
  2. R. M. Piticescu, R. Orban, S. Tanasescu, R. Piticescu, V. Badilita, M. Lucaci, Correlations between nanostructure and thermodynamic properties of NiAlMex-alumina composites, “New applications of micro- and nanotechnologies", Capitol in seria “Micro and Nanoengineering”, vol. 12, p. 45-56, Ed. Academiei Romane, 2008.
  3. D. Berger, C. Matei, G. Voicu, F. Papa, A. Bobaru, V. Fruth, Synthesis of La1-xSrxMO3 (M=Mn, Fe, Co, Ni) nanopowders by alanine-combustion technique, submitted to J.Eur. Ceram. Soc

B Lucrari comunicate la manifestari stiintifice internationale

  1. Speranta Tanasescu, Key parameters controlling the stability and reactivity of micro and nanostructured materials: Particle size versus energetics of nanomaterials, HOT NANO TOPICS 2008, Special Symposium on Nanosafety, Portoroz, Slovenia, 23-30 May 2008 (Invited lecture) 
  • C. Marinescu, F. Teodorescu, S. Tanasescu, Comparative thermodynamic study of some doped micro- and nano- structured lanthanum manganites, Conferinta EMCC5 (5th Chemical Engineering Conference for Collaborative Research in Eastern Mediterranean Countries), Cetraro, Italia, 24-29 May 2008
  • F. Teodorescu, C. Marinescu, A. Sofronia, S. Tanasescu, The influence of the nonstoichiometry on the thermodynamic properties of lanthanum doped manganites, Conferinta EMCC5 (5th Chemical Engineering Conference for Collaborative Research in Eastern Mediterranean Countries), Cetraro, Italia, 24-29 May 2008
  •  S. Tanasescu, Energetic parameters controlling the properties of micro and nanostructured multifunctional materials, EOARD 2008, Workshop "EXPLORING ROMANIAN RESOURCES IN MATERIALS RESEARCH", Brasov, Romania, July 7 – 8, 2008.
  • S. Tanasescu, C. Marinescu, F. Teodorescu, A. Sofronia, The Control of the Energetic Parameters: Important Step in Understanding the Stability and Reactivity of Micro and Nanostructured Matrerials, 16th Annual International Conference on Composites/Nano Engineering (ICCE-16), Kunming, Yunnan Province, China, 20-26 July 2008
  • Speranta Tanasescu, Cornelia Marinescu, Florina Teodorescu, The Influence of Particle Size and Nonstoichiometry on the Thermodynamic Properties of Conducting Transition Metal Oxides, 20th International Conference on Chemical Thermodynamics, Varsovia, 3-8 August 2008
  • C. Marinescu, F. Teodorescu, F. Maxim, S. Tanasescu, Thermodynamics of Micro and Nanostructured Magnetoresistive Lanthanum Manganites, 20th International Conference on Chemical Thermodynamics, Varsovia, 3-8 August 2008
  • Speranta Tanasescu, The control of the Energetic Parameters: Important Step in Understanding The Stability and Reactivity of Micro and Nanostructured Materials, Advanced in Ceramic Science and Engineering, Nonmetallic Inorganic Materials, ETH Zurich, 4-6 septembrie 2008
  • Speranta Tanasescu, Maria Nicoleta Grecu, Cornelia Marinescu, Liviu Mihail Giurgiu, Horia Chiriac, Maria Urse, Effects of dopants and oxygen nonstoichiometry on the thermodynamic, magnetic and electrical properties of micro- and nanostructured perovskite-type materials,  Electroceramics XI (Symposium K: Superconductors and Magnetic Materials), UK, 31 august – 4 septembrie 2008
  • Speranta Tanasescu, Cornelia Marinescu, Ancuta Sofronia, Adelina Ianculescu, Liliana Mitoseriu, Thermodynamic investigation of the (1-x)BiFeO3-xBaTiO3 solid solutions, Electroceramics XI (Multiferroics) UK, 31 august – 4 Sept. 2008
  • V. Pârvulescu, S. Şomăcescu, P. Osiceanu, S. Tanasescu and B-L. Su, Mezoporous TiO2-Y2O3-ZrO2 oxides with crystalline framework obtained by surfactant template synthesis, 4th INTERNATIONAL FEZA CONFERENCE, September 2-6, 2008, "Zeolites and Related Materials: Trends, Targets and Challenges", Paris, France
  • S. Tanasescu, Grain and size dependent thermodynamic data: Applications to the phase diagrams evaluations and oxide-based composite materials characterization, International Conference of Physical Chemistry ROMPHYSCHEM-13, 3-5 Sept. 2008
  • A.C. Marinescu, F. V. Maxim, R. Valcu, S. Tanasescu, N. Totir, Evaluation of manganese and oxygen content in La-Mn perovskites by electrochemical and chemical methods, International Conference of Physical Chemistry ROMPHYSCHEM-13, 3-5 septembrie 2008
  • A. Sofronia, C. Marinescu, A. Petcu, F. Teodorescu, A Ianculescu, L. Mitoseriu, S. Tanasescu, Thermodynamic investigation of the barium titanate based ceramics, International Conference of Physical Chemistry ROMPHYSCHEM-13, 3-5 Sept. 2008
  • D.A. Neacsu, A.C. Marinescu, A. Sofronia, S Tanasescu, Mathematical modeling and simulation of equilibrium thermodynamic properties and phase diagrams of some alloys, International Conf. of Physical Chemistry ROMPHYSCHEM-13, 3-5 Sept. 2008

C.Lucrari prezentate la manifestari stiintifice nationale

  • Speranta Tanasescu, Cornelia Marinescu, Ancuta Sofronia, Florina Teodorescu, Influenta dimensiunii particulelor asupra si energeticii fazelor de oxizi: Aplicatii la evaluarea diagramelor de faze si la caracterizarea materialelor nanocompozite, A 7-a Editie a Seminarului National pentru Nanostiinte si Nanotehnologie, Academia Romana , martie 2008
  • Roxana Mioara Piticescu, Radu Orban, Speranta Tanasescu, Corelatii proprietati mecanice-nanostructura in materiale compozite avansate cu distributie miez-invelis, A 7-a Editie a Seminarului National pentru Nanostiinte si Nanotehnologie, Academia Romana, martie 2008

 D. Conectarea la platforme europene de cercetare
S. Tanasescu, "General Assembly of the European Technology Platform ETP Nanomedicine", Workhop on Drug delivery & Brokerage event, Madrid, Spania 25-26 septembrie 2008 (prezentare orala)
E. Includerea în teze de doctorat a rezultatelor cercetărilor efectuate.
Tinerii doctoranzi Marinescu Cornelia, Florentina Maxim, Petcu Alina care fac parte din echipa de lucru a proiectului valorifica direct prin programul lor de doctorat rezultatele privind studiul termodinamic al compusilor oxidici investigati.

F. Participarea tinerilor cercetatori la cursuri de instruire
1. Doctoranzii Cornelia Marinescu si Petcu Alina au participat in perioada 24-29 iunie 2008 la cursurile “Summer School of Calorimetry and Thermal Analysis” organizate in Lyon, Franta de catre CNRS Institut de recherches sur la catalyse et l'environnement din Lyon si de Universitea din Lyon.
2. Doctorand Cornelia Marinescu a participat in perioada, 9-13 iunie 2008  la doua cursuri European Advanced Training Courses: “Computer-Aided Thermodynamics” si “Simulation of Phase Transformations” organizate de Max-Planck-Institut, in Maria Laach, Germania.
G.Organizarea de manifestari stiintifice la care au fost diseminate rezultatele cercetarilor
Institutul de Chimie Fizica “Ilie Murgulescu” a organizat International Conference of Physical Chemistry ROMPHYSCHEM-13, 3-5 septembrie 2008 in programul careia au fost incluse lucrari (a se vedea lista lucrarilor comunicate) prin care sunt diseminate o serie dintre rezultatele obtinute in cadrul proiectului.

 

REZULTATE 2009




 

¨Lucrari publicate si in curs de publicare

  1. Speranta Tanasescu, Maria Nicoleta Grecu, Cornelia Marinescu, Liviu Mihail Giurgiu, Horia Chiriac, Maria Urse, Effects of dopants and oxygen nonstoichiometry on the thermodynamic and magnetic properties of micro- and nanostructured perovskite-type materials, Advances in Applied Ceramics, 108, 5, 273-279 (2009)
  2. S. Tanasescu, C. Marinescu, A. Sofronia, A. Ianculescu, L. Mitoseriu, High temperature thermodynamic data of some multiferroic ceramics based on BiFeO3 – BaTiO3 solidsolutions", Journal of Optoelectronics and Advanced Materials, 11, 8, 1196 -1201 (2009).
  3. D. Berger, C. Matei, G. Voicu, F. Papa, A. Bobaru, V. Fruth, Synthesis of La1-xSrxMO3 (M=Mn, Fe, Co, Ni) nanopowders by alanine-combustion technique, J. Eur. Ceram. Soc. 30, 617-622 (2010).
  4. Speranta Tanasescu, Cornelia Marinescu, Evaluation of manganese and oxygen content in La0.7Sr0.3MnO3-δ and correlation with the thermodynamic data, Journal Solid State Electrochemistry, in press (2010).
  5. R. M. Piticescu, R. Orban, S. Tanasescu, R. Piticescu, V. Badilita, M. Lucaci, Correlations between nanostructure and thermodynamic properties of NiAlMex-alumina composites, Capitol in New applications of micro- and nanotechnologies, Vol. 14, ser “Micro and Nanoeng.”, Ed. Acad Rom, 2009.
  6. C. Marinescu, A. Sofronia, Temperature and heat flow calibration of Differential Scanning Calorimeter (DSC) in the Heating Mode, Rev. Roumaine Chimie, in press
  7. S. Tanasescu, C. Marinescu, A. Sofronia, A. Petcu, F. Teodorescu, Thermodynamic data of some multiferroic ceramics based on BiFeO3-BaTiO3 solid solutions, Proc XI Workshop of APDTC, sept 2009, Ljubliana, Slovenia

B Lucrari comunicate la manifestari stiintifice internationale
1. Cornelia Marinescu, Ancuta Sofronia, Speranta Tanasescu, Adelina Ianculescu, Liliana Mitoseriu, High temperature heat capacity of some multiferroic ceramics based on BiFeO3 – BaTiO3 solid solutions, Prezentare orala la International Conference on Materials Science & Engineering, 26 – 28 February 2009, Brasov, Romania, BRAMAT 2009
2. Ancuta Sofronia, Cornelia Marinescu, Speranta Tanasescu, Adelina Ianculescu, Liliana Mitoseriu, The Fe/Mn ratio influence on the thermodynamic properties of Bi0.9La0.1Fe1-xMnxO3 (x=0-0.5), Prezentare sub forma de poster la International Conference on Materials Science & Engineering, 26 – 28 February 2009, Brasov, Romania, BRAMAT 2009
3. Speranta Tanasescu, Cornelia Marinescu, Anca Sofronia, Florina Teodorescu, Energetic parameters controlling the properties of micro and nanostructured transition metal oxides, ZING Solid State Chemistry Conference”, 25-28 February 2009, Cancun, Mexic
4. Speranta Tanasescu, Cornelia Marinescu, Anca Sofronia, Florina Teodorescu, Alina Petcu, The influence of dopants, oxygen nonstoichiometry and particle size on the thermodynamic data of perovskite-type materials, lucrare invitata la “13th International IUPAC Conference on High Temperature Materials Chemistry”, HTMC-13, September 14-19, 2009 at the University of California, Davis.
5. S. Tanasescu, C. Marinescu, A. Sofronia, A. Ianculescu, L. Mitoseriu, High temperature thermodynamic properties of some multiferroic ceramics based on BiFeO3, A 13-a Conferinta IUPAC privind Chimia Materialelor la temperatura inalta (13th International IUPAC Conference on High Temperature Materials Chemistry), Univ. Davis California, USA.
6. S. Tanasescu, C. Marinescu, A. Sofronia, A. Petcu, F. Teodorescu, Thermodynamic data of some multiferroic ceramics based on BiFeO3-BaTiO3 solid solutions, XI Workshop of APDTC, 18-20 septembrie, Ljubliana, Slovenia
7. Speranta Tanasescu, Cornelia Marinescu, Florina Teodorescu, Anca Sofronia, The Control of the Energetic Parameters: Important Step in Understanding the Stability and Reactivity of the Micro and Nanostructured Materials, 2009 Korea/Romania Joint Workshop: Molecular Science and Engineering, May 6th – 10th, 2009, Keimyung University, Korea
8. Florentina Maxim, Ru Zhong Hou, Aiying Wu, Paula Ferreira, Paula M. Vilarinho, “Piezoresponse and Morphology of Nanoferroelectrics”, PFM4, June 23-27, 2009, Aveiro, Portugal.
9. F. Maxim, P. Ferreira, P.M. Vilarinho, Anne Aimable, Paul Bowen, “Additive Assisted Aqueous and Hydrothermal Synthesis of Barium Titanate Nanoparticles”, VI Jornadas CICECO 2009, 5-6 th March 2009, Aveiro, Portugal.
C.Lucrari prezentate la manifestari stiintifice nationale

Speranta Tanasescu, Cornelia Marinescu, Ancuta Sofronia, Adelina Ianculescu, Liliana Mitoseriu, Effects of composition and particle size on the thermodynamic data: Applications to multi-ferroic materials and phase diagrams investigation, 18th Symposium of Thermal Analysis and Calorimetry - 12 februarie 2009, Academia Romana

D. Conectarea la platforme europene de cercetare
S. Tanasescu, "General Assembly ETP Nanomedicine", Workhop on Drug delivery & Brokerage event, Munster in Germania, 10-12 mai 2009

E. Includerea în teze de doctorat a rezultatelor cercetărilor efectuate.
Tinerii doctoranzi Marinescu Cornelia, Florentina Maxim, Petcu Alina care fac parte din echipa de lucru a proiectului valorifica direct prin programul lor de doctorat rezultatele privind studiul termodinamic al compusilor oxidici investigati. Cornelia Marinescu si-a sustinut teza de doctorat in anul 2009, tema tezei fiind legata direct de cercetarile efectuate in etapele parcurse in cadrul proiectului de fata.

F. Participarea tinerilor cercetatori la cursuri de instruire
1. Doctoranda Alina Petcu a participat in perioada 11-17 iulie 2009 la cursurile “3rd International Summer School on “Nanosciences & Nanotechnologies” (SS-NN09)
organizate in Thessaloniki, Grecia.
2. Doctoranda Florentina Maxim a participat la “One day course on High Resolution Imaging Techniques”, March 28th, 2009, University of Aveiro, DECV, Aveiro, Portugal.

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