Improved fluorescent silica nanoparticles through silica densification

Improved fluorescent silica nanoparticles through silica densification

  • CN 102,459,062 B
  • Filed: 04/15/2010
  • Issued: 03/22/2017
  • Est. Priority Date: 04/15/2009
  • Status: Active Grant
First Claim
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1. a kind of method for preparing core-shell silica nanoparticles, including step:

  • A) causing under conditions of silica precursor hydrolyzes to form silica core, by by silica precursor and covalent bondThe silica precursor for being bonded to light absorbing material and/or light transmitting fluorescence or phosphor material is combined, and prepares silica core,Wherein, the light absorbing material and/or light launch the silica network knot of fluorescence or phosphor material covalently bonded to the coreStructure;

    AndB) under conditions of new nano SiO 2 particle formation is not observed, titanium dioxide is added at a temperature of at least 50 DEG CSilicon precursor, forms the silica shell of the cladding silica core, wherein the density of the silica shell is at least 1.4g/cm3

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