Title:
LUMINESCENT BISMUTH SILICATES, USE AND METHOD FOR PRODUCING THEREOF
Document Type and Number:
WIPO Patent Application WO/2016/203431
Kind Code:
A1
Abstract:
The present invention relates to luminescent compounds of lanthanide/Yb doped bismuth silicate that present a crystalline structure and are characterized by non-linear optical properties, particularly photon up-conversion following IR or NIR excitation. Furthermore, the present invention describes several synthesis routes for producing said compounds in different form (e.g. particles, core-shell particles, bulk crystal), dimension (e.g. nanoscale or microscale) and crystalline structure, which result in tunable optical properties in view of a specific application. Particularly, there are disclosed Er/ Yb, Ho/Yb, Tm/Yb doped bismuth silicate nanoparticles that emit up-conversion light of the three basic colors (RGB). As said compounds are non-cytotoxic and present attractive optical properties, they find a wide range of applications, both industrial (e.g. lighting, solar energy, anti-counterfeiting) and biomedical (e.g. drug delivery, bio-imaging, nanomedicine).
Inventors:
BACK MICHELE (IT)
RIELLO PIETRO (IT)
RIELLO PIETRO (IT)
Application Number:
PCT/IB2016/053594
Publication Date:
December 22, 2016
Filing Date:
June 17, 2016
Export Citation:
Assignee:
UNIVERSITA' CA' FOSCARI (IT)
International Classes:
C09K11/74; A61K49/00
Domestic Patent References:
| WO2015025297A1 | 2015-02-26 |
Foreign References:
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Other References:
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ZHEN-AN QIAO ET AL., CHEM. MATER., vol. 21, 2009, pages 3823 - 3829
JIANG L ET AL: "Enhancement of up-conversion luminescence in ZnSiO:Yb, Erby co-doping with Lior Bi", APPLIED PHYSICS B ; LASERS AND OPTICS, SPRINGER, BERLIN, DE, vol. 107, no. 2, 20 April 2012 (2012-04-20), pages 477 - 481, XP035057782, ISSN: 1432-0649, DOI: 10.1007/S00340-012-4986-9
LIU H ET AL: "The structure and luminescence characteristics of SrSiO3:Eu<3+>:Bi<3+> synthesized at a high pressure and high temperature", JOURNAL OF ALLOYS AND COMPOUNDS, ELSEVIER SEQUOIA, LAUSANNE, CH, vol. 191, no. 1, 29 January 1993 (1993-01-29), pages 1 - 4, XP025887771, ISSN: 0925-8388, [retrieved on 19930129], DOI: 10.1016/0925-8388(93)90261-K
LIANG CHENG ET AL: "Upconversion nanoparticles and their composite nanostructures for biomedical imaging and cancer therapy", NANOSCALE, no. 5, 2013, pages 23 - 27
ZHEN-AN QIAO ET AL., CHEM. MATER., vol. 21, 2009, pages 3823 - 3829
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