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Project List » Nuclear methods complementary to conventional for the analysis and characterization of nano-materials

Nuclear methods complementary to conventional for the analysis and characterization of nano-materials
proiecte.nipne.ro/pn2/65-projects.html
Extended website: http://www.nipne.ro/Struct/AppPhyDep/nucnano.html

Acronym: NUCNANO
Contracting Authority: Executive Agency for Higher Education, Research, Development and Innovation Funding (UEFISCDI)
Number / Date of the contract: 72191 / 01.10.2008
Parteneriate in domeniile prioritare
Project Manager: Petru Mihai Racolta
Partners: "Alexandru Ioan Cuza" University of Iasi; National Institute for Laser, Plasma and Radiation Physics; National Institute of Research and Development for Optoelectronics
Starting date / finishing date: 2008-10-01 / 2011-08-31
Project value: 2000000 RON
Abstract: materials, complementary to classical methods of analysis (TEM, SEM, AFM,RAMAN, XRD,UV-VIS-NIR), available at the partners, in order to optimize the technological processes and improve the physical/chemical performance of the nanocompounds produced. The nuclear methods considered, depending on specific nanomaterials, are those which allow identification of the chemical composition (X-Ray Fluorescence – XRF, Particle Induced X-Ray Emission – PIXE, Particle Induced Gamma Emission – PIGE, and Resonant Nuclear Reactions – RNR), the composition of multistrate structures and stoichiometry of thin layers by Rutherford Backscattering Spectroscopy-RBS, the concentration and distribution of vacancy-type defects and the space distribution of electronic densities in the bulk (Positron Annihilation Spectroscopy- PAS), methods of structure engineering of nanocompounds by positive ion implant, using the Cyclotron or the Tandem accelerator. The project analyzes and characterizes three types of nanomaterials: polymer/metal particle matrix-type nanocompounds, carbonic nanostructures and materials obtained by synthesis from quantum nanodots imbedded in thin layers. Polymer/metal particle matrix-type nanocompounds have applications in the design of structures with controlled release of useful active principles in bio-medicine. The metal particles embedded in the polymer act, on one hand, as a source of ions which migrate through the matrix and modify the electrical properties of the compound, and on the other, they create in the matrix, metal/polymer interfaces with specific electron density distributions, which allow new properties. P1 uses the following conventional methods: XRD, SEM, TEM, HRTEM and EDAX. Based on laser techniques, several methods of deposition have been developed for thin layers, including multistrat, and also for the synthesis in plasma, of a large variety of nano-structured carbonic materials (nano-tubes, nano-fibres, nano-particles). The composition and the space and density distribution of the electrons in the compound largely influence the physical and chemical properties of the product. These materials are applied in field emission devices (lower emission threshold and higher current densities than of nano-tubes), combustion cells, gas storage (hydrogen storage), membranes for combustion cells, as base material for catalytic nano-particles. Electron microscopy, Atomic Force Microscopy (AFM), scanning tunneling microscopy (STM), Fourier-Transform Infrared Spectroscopy (FTIR), Raman Spectroscopy and contact angle measurements are the methods used by P2. Based on Physical Vapour Deposition in vacuum (PVD), it is possible to obtain materials by synthesis of Quantum Dot structures (QDs), with optoelectronic applications. Their characterization can be done by UV-VIS-NIR spectroscopy, surface analysis with AFM/STM and mechanical parameter measurements. The Consortium has two accredited laboratories on national level and one of microbiology and biocompatibility, accredited internationally, which will characterize the polymer matriix/metal nano-particle type nanocompounds with medical application. The project will establish the level of implication and utility of the nuclear methods of analysis and characterization of nanomaterials, complementary to the classical methods. Another aspect which will allow the alignment of local producers of nanocompounds on the level of performance of the EC, are tests and engineering by irradiation with accelerated beams at the cyclotron and tandem accelerators, unique facilities in Romania, for specific applications.

Objectives:

THE STAGES OF THE PROJECT AND DELIVERY DATES
1. Selection of nuclear methods for the characterization of metal-polymer matrix type nanocompounds (2009-02-28)
2. Experiments for the establishment of the parameters of nuclear methods (2009-11-11)
3. Experiments for the optimization of the methods of analysis of nanocompounds. (2010-03-15)
4. Experiments for the optimization of the methods of analysis of nanocompounds (2010-10-27)
5. Elaboration of nuclear methods, complementary to the conventional ones, for the characterization of nanocompounds subject of this study (2011-08-31)

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