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1. (WO2017034477) COATED UPCONVERSION NANOPARTICLES AND THEIR METHODS OF PREPARATION

Pub. No.:    WO/2017/034477    International Application No.:    PCT/SG2016/050400
Publication Date: Fri Mar 03 00:59:59 CET 2017 International Filing Date: Sat Aug 20 01:59:59 CEST 2016
IPC: C09K 11/85
B82Y 30/00
B82Y 15/00
B82Y 40/00
C30B 29/12
B82Y 20/00
B82Y 5/00
C01F 17/00
G01N 21/64
B82B 3/00
Applicants: NATIONAL UNIVERSITY OF SINGAPORE
Inventors: ZHANG, Yong
HUANG, Kai
Title: COATED UPCONVERSION NANOPARTICLES AND THEIR METHODS OF PREPARATION
Abstract:
There is disclosed a method of tuning the size, shape and fluorescence intensity of upconversion nanoparticles by the steps of (a) forming an upconversion nanoparticle with the chemical formula (I) MA1-xCxF4: Yby, Bz; and/or (b) coating the core upconversion nanoparticle with a composition (II): M'A'1-x'Lux'F4: Yby, B'z, to provide a core-shell nanoparticle, where M, M', A, A', x, x', y, y', B, B', z, z' and C are as defined herein.