CONTACT NON-EQUILIBRIUM PLASMA FOR COLLOIDAL NANOMATERIALS SYNTHESIS AND SURFACE ENGINEERING
Makarova A.K., Vorobyova M.I.,
Ukrainian State University of Chemical Technology,
National Technical University of Ukraine Kiev Polytechnic Institute,
In recent years noble metal nanoparticles have been the subjects of focused researches due to their unique electronic, optical, mechanical, magnetic and chemical properties that are significantly different from those of bulk materials .
These special and unique properties could be attributed to their smallsizes and large specific surface area. For these reasons metallic nanoparticles have found uses in many applications in deferent fields as catalysis, electronics, and photonics. A variety of preparation routes have been reported for the preparation of metallic nanoparticles; notable examples include, reverse micelles process, salt reduction, microwave dielectric heating reduction, ultrasonic irradiation, radiolysis, solvothermal synthesis, electrochemical synthesis, etc. In recent years nanoparticles of silver have been found to exhibit interesting antibacterial activities .
The contact non-equilibrium plasma offers enhanced opportunities over solution chemistry for synthesis new nanomaterials and tailoring their functional properties. This synthesis technique does not need any added reducing and/or capping agents and only requires a water-based solution with the metal precursor.
Plasma-induced non-equilibrium liquid chemistry is used to synthesize gold nanoparticles (AuNPs) without using any reducing or capping agents. The morphology and optical properties of the synthesized AuNPs are characterized by transmission electron microscopy (TEM) and ultraviolet–visible spectroscopy. Plasma processing parameters affect the particle shape and size and the rate of the AuNP synthesis process.
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