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Content archived on 2022-12-23

Synthesis of nanosized materials with specified properties by powerful pulsed heating

Objective

One of the most challenging tasks in modern nanotechnology is reproducible production of nanoscale materials with desirable properties. The Project proposes a comprehensive study of nanoparticle synthesis during powerful- pulsed heating of the materials of different classes (metals, semiconductors, dielectrics) under pulsed laser ablation (PLA) in the phase explosion regime and electrical wire explosion (EWE). The study is directed to correlate the key process parameters (heating rate, kind of environment) and the structural properties of heated matter with the identity of the formed nanoparticles in an attempt to establish general principles which can indicate ways for the synthesis of new nanostructured materials.

The emphasis is on both the engineering of controlled nanostructures and on the study of the physical processes leading to the formation of nanoparticles during condensed matter decomposition and in subsequent condensation in the expanding plasmas. The study will be experimental and theoretical, drawing on some of the relevant physical models developed for laser - matter interaction and expanding plasmas. A key point of the project is to model nanoparticle formation under the actual dynamic conditions of PLA and EWE and to compare the two techniques in respect to nanomaterial synthesis.

Optimization based on synergy of the experimental and theoretical studies is expected to lead to a scalable technology for a cost effective scheme to produce nanodispersed powders. Nanoparticles of metals, semiconductors, and dielectrics will be synthesized in quantities sufficient to demonstrate their properties and will be characterized by their size, crystalline structure, morphology, chemical reactivity, catalytic and magnetic properties, stability against agglomeration. It is expected to obtain nanoparticles with new unique properties. New fundamental results on matter behaviour under extreme super-heatings will be obtained by theoretical studies based on a number of complementary approaches involving molecular dynamic, hydrodynamic, MHD, DSMC, and kinetic modelling. The models developed in the frames of the Project may form a basis for developing the application codes of wide interest for the researches in nanoparticle science.

The Project will be finalized by elaboration of recommendations on synthesis of nanoparticles with the narrow size distributions and by suggestions on new nanoparticle applications based on thorough studies of the nanoparticle properties. The research teams involved to the proposed project have a wide range of necessary complementary experimental methods and joint expertise in the fields of laser ablation, electrical wire explosion, and nanoparticle synthesis. In addition, the strong background of the teams in developing and applying hydrodynamic, kinetic, and statistical models provides the basis for advance in the understanding and theoretical treatments of nanoparticle formation processes during PLA and EWE.

Topic(s)

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Call for proposal

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Funding Scheme

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Coordinator

GÖTEBORG UNIVERSITY
EU contribution
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Address
FYSIKGRAND, 3
GÖTEBORG
Sweden

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Participants (4)