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Mater Sci Nanotechnol 2017 | Volume 1 Issue 2
allied
academies
Nanomaterials and Nanochemistry
November 29-30, 2017 | Atlanta, USA
International Conference on
Notes:
T
he main reasons why iron based nanostructures and among
them magnetite nanoparticles become a very popular
subject for so many studies is huge applicable potential due to
their universality, low toxicity to living organisms, and relatively
high biodegradability. The fact, that magnetite as compound is
considered as a biodegradable it significantly reduces a risk of
environmental pollutions caused by nanostructures after the
accomplishment of its function. The foreseen drawback is that
solubility of magnetite is rather low in most of the solvents.
That properties provides new advantages and allows to use it
in many medicine related areas or wide range environmental
protection. In addition, simple single phase nanoparticles can
be modified layer-wise to obtain more advanced core-shell
structures, where each part possess new useful properties and
that way many multifunctional structures can be obtained.
On the other hand, layered morphology helps to prevent the
degradation process caused by different factors and related to
that pollution or influence on the dissolution process what avoid
toxicity of the final waste. Interplay between structural and
magnetic properties of the received nanostructures permits to
performmodifications by compounds containing free functional
groups, where the most universal one are: amine, carboxylic,
phosphonic or thiolate one. Such hybrid systems allows in
following steps to capture specific compounds (heavy metals,
derivatives of medicaments, pesticides, etc.) in rather easy
way. Resultant heterostructures can be successfully extracted
from the solution by the external magnetic field. Similarly many
compounds present in human body can find its counterparts at
the specially modified nanostructures surface and be analyzed.
However, efficiencyof it is related tosynergicbehaviorof reaction
environment/solution and inorganic cores/particles body. All
these causes that number of studies related to nanostructures
behavior in specific condition should be made and discussed
in details. Therefore, exploration of the stability of magnetic
nanostructures in different artificial and environmental solutions
will be reported. The survey was performed in few types of
liquids and variable temperatures. Nanostructures before
and after tests were measured by: Transmission and Scanning
Electron Microscopy, X-ray diffraction, Infrared and Raman
spectroscopy, and Mössbauer spectroscopy to monitor changes
of physicochemical properties as a result of the environment
influence. The amount of Fe (Cu, Ag) atoms transferred into the
solutions was estimated by Atomic Absorption Spectrometry.
Obtained results allow to conclude that: (i) magnetite
nanoparticles are only stable in all water-based solutions, (ii)
magnetite nanoparticles has variable durability which is related
to particles core-shell structure, (iii) Fe based nanowires are very
unstable regardless of their structure in all tested liquides, (iv)
temperature influences very significantly on nanostructures
composition and therefore its properties.
Speaker Biography
Beata Kalska Szostko has completed in 2000 her Ph.D in Materials Physics from
Uppsala University, Sweden. Her first postdoctoral position (2001-2003) was at
Free University Berlin in Experimental Physics group. At the moment she is working
at Chemistry Department University of Białystok, Poland. She is the Director of The
Center of Synthesis and Analysis BioNanoTechno University of Bialystok, Poland. She
has published more than 75 papers in reputed journals and has been serving as a
reviewer for many scientific journals. She has more than 90 presentations of the results
on National and International Conferences. She was and still is involved in an activity
of few COST Actions.
e:
kalska@uwb.edu.plBeata Kalska Szostko
University of Bialystok, Poland
Nanostructures and its stability in the different environment