Title:
SURFACE-MODIFIED TANTALUM OXIDE NANOPARTICLES, PREPARATION METHOD THEREOF, AND CONTRAST MEDIUM FOR X-RAY COMPUTED TOMOGRAPHY AND HIGHLY DIELECTRIC THIN FILM USING SAME
Document Type and Number:
WIPO Patent Application WO/2011/105736
Kind Code:
A3
Abstract:
The present invention relates to surface-modified tantalum oxide nanoparticles, a preparation method thereof, and a contrast medium for X-ray computed tomography and a highly dielectric thin film using the same. More specifically, the present invention relates to surface-modified tantalum oxide nanoparticles, a preparation method of the surface-modified tantalum oxide nanoparticles comprising the following steps: (i) adding an aqueous phase containing water to an organic solvent containing a surfactant to prepare a water-in-oil micro-emulsion; (ii) introducing a tantalum precursor to the micro-emulsion; (iii) adding a surface modifying agent containing an organic silane group or a phosphine group to the solution obtained in step (ii) to react the same; (iv) removing the organic solvent from the reaction product of step (iii); and (v) separating surface-modified tantalum oxide nanoparticles from the mixture obtained in step (iv), and a contrast medium for X-ray computed tomography and a highly dielectric thin film using the same.
Inventors:
HYEON TAEGHWAN (KR)
OH MYOUNG HWAN (KR)
OH MYOUNG HWAN (KR)
Application Number:
PCT/KR2011/001165
Publication Date:
February 02, 2012
Filing Date:
February 22, 2011
Export Citation:
Assignee:
SNU R&DB FOUNDATION (KR)
HYEON TAEGHWAN (KR)
OH MYOUNG HWAN (KR)
HYEON TAEGHWAN (KR)
OH MYOUNG HWAN (KR)
International Classes:
A61K9/16; A61K9/14; A61K49/00
Foreign References:
| KR20090108697A | 2009-10-16 | |||
| US6696585B1 | 2004-02-24 | |||
| JP2008540641A | 2008-11-20 |
Other References:
KISHIDA, M. ET AL.: "Preparation of Silica-Coated Rhodium Nanoparticles Using Water-in-Oil Microemulsion", CHEMISTRY LETTERS, vol. 29, no. 9, 2000, pages 1108 - 1109, XP055096547
HOLZINGER, D. ET AL.: "Preparation of Amorphous Metal-Oxide-Core Polymer-Shell Nanoparticles via a Microemulsion-Based Sol-Gel Approach", CHEMISTRY OF MATERIALS, vol. 15, 2003, pages 4944 - 4948, XP055096548
HOLZINGER, D. ET AL.: "Preparation of Amorphous Metal-Oxide-Core Polymer-Shell Nanoparticles via a Microemulsion-Based Sol-Gel Approach", CHEMISTRY OF MATERIALS, vol. 15, 2003, pages 4944 - 4948, XP055096548
Attorney, Agent or Firm:
SEO, Keun Bok (9Ho Sungji Heights Bldg., 642-6,,Yeoksam-dong, Gangnam-g, 3rdSeoul 135-080, KR)
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Claims: