HYDROTHERMAL
synthesis of nanostructured MATERIALS for biotechnological applications
Roxana M. Piticescu, Robert. Piticescu
Institute for Non-ferrous & Rare Metals, 102 Biruintei Blvd., 077145
Pantelimon, jud. Ilfov, Romania
Stefania Petrescu, Biochemistry Institute of the Romanian
Academy
Hydrothermal procedures
(hydrothermal reactions and hydrothermal crystallization) show important
advantages from the thermodynamic and kinetic point of view (larger
domain stability of precipitated species, faster kinetics of
crystallization) as well as from technological point of view (direct
synthesis of crystalline materials in one-step process, low synthesis
temperatures, better control of the crystallization and grain sizes with
possibilities to obtain nanocrystalline materials, versatility,
environmental friendly technology).
Important novelties developed
by our group consist in developing nanocrystalline thin films or polymer
surface modified nanopowders using hydrothermal and
hydrothermal/electrochemical methods to control the materials morphology
and texture.
Applications of thermodynamic
and kinetic modeling of the hydrothermal processes are presented for the
synthesis of Yttria doped-Zirconia nanocrystalline materials used for
biomedical sensors, pure and doped PZT nanopowders and films used for
piezoelectric sensors and actuators and hydroxyapatite-polymer
nanocomposite powders with enhanced biologic activity.