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Volume 5, Issue 5 Res. Rev. J Mat. Sci. 2017
ISSN: 2321-6212 Advanced Materials 2017
September 07-08, 2017
September 07-08, 2017 | Edinburgh, Scotland
Advanced materials & Processing
11th International Conference on
Particle size versus energetics of nanomaterials: Key parameters controlling the stability and reactivity of
nanostructured materials
Speranta Tanasescu
Institute of Physical Chemistry “Ilie Murgulescu” of the Romanian Academy, Romania
Due to the unique and unusual physical and chemical properties of the systems and structures at the nanoscale, the understanding
of their stability and reactivity, presents a host of questions and problems. The dimension-dependent properties or phenomena
may be used for functional effects, the nanotechnology taking advantage of this by designing property modifications for applicative
reasons. At the same time, research to date suggests that some engineered nanomaterial’s will present hazards, thus challenging many
conventional approaches related to nanosafety area. Because this is an emerging scientific issue, to identify key parameters important
for evaluating the possible benefits as well as risks is a central point in the research activity with impact in the materials science. In
the present paper will be argued that control of the energetic parameters and the understanding of their crossover when working at
the nano-level are important steps in understanding the nanomaterial stability and the possibilities to interaction with the biologic
systems. Some compounds from specific systems were selected for Discussion: nanostructured transition metal oxides; Nano alloys,
bio-nonbio systems. Several conclusions can be drawn from the characterization data obtained so far: •Exploring the relationships
between different compositional variables and thermodynamic properties of Nano crystalline transition metal oxides we obtained
that particular behavior of these materials could be explained not only qualitatively by the structural changes, but also by the fact
that the energetic properties are extremely sensitive to the chemical defects in oxygen sites. •Investigating the metastable phases of
Nano alloys synthesized by severe deformation non-equilibrium methods we obtained that the energetic parameters may be used to
explain the experimentally observed stability in particular temperature ranges associated with the growth process of nanometer-sized
samples. •The evaluation of the thermodynamic parameters describing the nanoparticle - protein interaction is a key issue for the
bio-reactivity of nanomaterial’s having a great impact in nanosafety research.
Biography
Speranta Tanasescu is Head of the Laboratory of Chemical Thermodynamics in the Institute of Physical Chemistry “Ilie Murgulescu” of the Romanian Academy,
Bucharest. She received his Ph.D. in Physical Chemistry – Romanian Academy in1979; the thematic research area is oriented on activities with impact in the
following domains: materials science, nanoscience and nanotechnologies, new sources of energies, nanosafety, nanomedicine etc. The obtained results by
her group are significant for both the understanding of processing-structure relationships, as well as for finding key parameters in relation to bio-reactivity of the
nanomaterial’s with mpact in nanosafety research.
Speranta Tanasescu, Res. Rev. J Mat. Sci. 2017, 5:5
DOI: 10.4172/2321-6212-C1-005
The control of the energetic parameters:
important step in understanding the
stability and reactivity of nanostructured
materials