第197回応用セラミックス研究所講演会（レンヌ第一大学 Grasset教授）
| 開催日時 | 2011年08月08日 16：00－17：00 |
|---|---|
| 開催場所 | R3棟1階 会議室 |
| 主催 | 応用セラミックス研究所 |
| 連絡先 | 神谷利夫 （内線：5357） |
プログラム等
講師：
Prof. Fabien GRASSET
Sciences Chimiques de Rennes, Universit de Rennes 1 (フランス レンヌ第一大学)
講演テーマ:
From colloidal chemistry to functional nanomaterial of ZnO and SiO2:magnetic and optical properties
講演内容：
By exploiting important colloidal phenomena (i.e. transparency, rheology, versatile chemical process, we propose to synthesise new magnetic and/or photonic nanomaterials (colloidal solution, nanopowders, gels, thin films, etc). This contribution highlights our efforts to elaborate and to characterize various nanostructures such as M@ZnO, (M = Ti, Eu), M@SiO2 (M = g-Fe2O3, ZnFe2O4, CeO2, and/or Cs2Mo6Br14) and new water soluble micelles containing g-Fe2O3-QDs. Firstly, we will demonstrate the possibility to prepare various functional thin films or hybrids nanomaterials by using Ti@ZnO organosols and sol-gel technology. Secondly, the synthesis of @SiO2 functionnal nanoparticles under restricted environments offered by water-in-oil microemulsions will be presented. For instance, these environments have been used in the synthesis of monodispersed silica nanoparticles with a magnetic and optical core. Such nanoparticles are good candidate for bioimaging knowing that the red/infrared Mo6 cluster emission range could be selectively transmitted through tissues due to the low absorption at these wavelengths coupling with magnetic resonance imaging. Finally, we will describe the preparation of new nanocomposite bioconjugable micelles by simultaneous encapsulation of CdSe/ZnS QDs (2-4 nm) and magnetic g-Fe2O3 nanoparticles (3-4 nm) into of synthetic functional PEG amphiphiles bearing a bioactivable terminal group. These multifunctional fluorescent and magnetic nanoparticles of small size can target any biomolecule through biotin/streptavidin or amide covalent binding and could be used to manipulate and vary its spatial distribution under a magnetic gradient field.
