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High pressure-low temperature synthesis of new nanostructured compounds
|Roxana M. Piticescu 1, Robert R. Piticescu 2, Gérard M. Demazeau 3, Madalina L. Popescu 2|
1. National Institute for Nonferrous and Rare Metals (IMNR), 102 Biruintei Blvd., Pantelimon 077145, Romania
Mild thermodynamic conditions (in terms of pressure and temperature parameters) specific to hydrothermal or solvothermal reactions are able to initiate through chemical bounding directly from solutions new developments in inorganic and molecular chemistry. The enhanced reactivity at the solution/nuclei or inorganic/organic interfaces is one way able to improve chemical bounding between different species. Such chemical bonds can be used to produce in soft conditions nanostructured oxide compounds or hybrid inorganic/organic molecules. More over, the addition of external electric field is able to produce oriented grain growth deposition of thin films starting from these nanocomponds.
The paper presents the opportunities offered by the methods developed by our research group in obtaining different new materials. Examples presented are doped nanocrystalline zinc oxide – maleic acid copolymers with controlled nanostructure and electronic properties, hydroxyl apatite – polysaccharides and layered silicates-polymer compounds - calcium phosphate-polymer hybrids for tissue engineering and regenerative medicine.
Acknowledgment: Romanian Agency for Scientific Research for financial support in the frame of Research for Excellence contracts 46-ReteBdent, 69-SINAPS and 16-TECOREMED and COST D30 – High pressure Tuning of Materials.
Presentation: Oral at E-MRS Fall Meeting 2007, Acta Materialia Gold Medal Workshop, by Madalina L. Popescu
See On-line Journal of E-MRS Fall Meeting 2007
Submitted: 2007-05-13 21:44 Revised: 2009-06-07 00:44