Method for preparing fluorescent silica nanoparticles by ultraviolet light radiation

A silicon nanoparticle and ultraviolet light technology, applied in the field of nanomaterials and biological analysis and detection, can solve the problems of low fluorescence quantum efficiency, excessive size, complicated process, etc., and achieve safe and easy availability of raw materials, good water solubility, and quantum yield. high effect

Active Publication Date: 2015-01-07
SUZHOU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, although these methods can greatly enhance the water dispersibility of silicon nanoparticles, the process is relatively complicated (for example, it is first necessary to prepare hydrophobic silicon nanoparticles and then modify them with hydrophilic groups). , and the modification process is easy to damage the surface of silicon nanoparticles, affecting its physical/chemical properties (acrylic acid/allylamine modified silicon nanoparticles have poor pH stability; polymer/microbeam modified silicon nanoparticles are too large in size (60~ 300nm)) (See: Angew. Chem. Int. Ed. 2009, 121, 134-138; Nano Today 20

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  • Method for preparing fluorescent silica nanoparticles by ultraviolet light radiation
  • Method for preparing fluorescent silica nanoparticles by ultraviolet light radiation

Examples

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Embodiment 1

[0022] (1) Preparation of silicon nanoparticle precursor solution

[0023] 2 g of naphthalimide was added to 500 ml of an aqueous solution dissolved in 50 ml of 3-aminopropyltrimethoxysilane as a precursor solution of silicon nanoparticles.

[0024] (2) Preparation of water-soluble fluorescent silicon nanoparticles by UV radiation

[0025] The obtained silicon nanoparticle precursor solution is placed in a glass bottle for UV radiation to obtain water-soluble fluorescent silicon nanoparticle.

[0026] The UV radiation condition is: irradiation for 10 minutes.

Embodiment 2

[0028] (1) Preparation of silicon nanoparticle precursor solution

[0029] 6 g of naphthalimide and 2 g of polyvinylpyrrolidone were added to 500 ml of an aqueous solution dissolved in 20 ml of 3-aminopropyltrimethoxysilane as a precursor solution of silicon nanoparticles.

[0030] (2) Preparation of water-soluble fluorescent silicon nanoparticles by UV radiation

[0031] The obtained silicon nanoparticle precursor solution is placed in a glass bottle for UV radiation to obtain water-soluble fluorescent silicon nanoparticle.

[0032] The UV radiation condition is: irradiate for 30min.

Embodiment 3

[0034] (1) Preparation of silicon nanoparticle precursor solution

[0035] 1 g of naphthalimide and 2 g of polyvinylpyrrolidone were added to 200 ml of an aqueous solution dissolved in 20 ml of 3-aminopropyltrimethoxysilane as a precursor solution of silicon nanoparticles.

[0036] (2) Preparation of water-soluble fluorescent silicon nanoparticles by UV radiation

[0037] The obtained silicon nanoparticle precursor solution is placed in a glass bottle for UV radiation to obtain water-soluble fluorescent silicon nanoparticle.

[0038] The UV radiation condition is: irradiation for 1h.

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Abstract

The invention discloses a method for preparing fluorescent silica nanoparticles by ultraviolet light radiation, which comprises the following steps of adding a silicon source compound into an aqueous solution of a reducing compound; adding a ligand compound, so that a precursor solution is obtained; and radiating the obtained product under ultraviolet light, so that water soluble fluorescent silica nanoparticles are obtained. The method disclosed by the invention is implemented completely in an aqueous phase, and therefore, the method is safe in operation, fast and convenient, low in toxicity, and safe and easily obtained in raw materials. The obtained fluorescent silica nanoparticles are good in monodispersity, high in fluorescence properties and quantum yield and good in stability, has good water solubility, can be used as fluorescent markers and widely applied to biological detection and analysis, and is expected to be used in related optical industrial productions.

Description

technical field [0001] The invention belongs to the technical field of nanomaterials and biological analysis and detection, and relates to a method for preparing silicon nanoparticle, in particular to a method for preparing fluorescent silicon nanoparticle by ultraviolet (UV) radiation. Background technique [0002] Due to their unique optical / electrical / mechanical properties, surface modification and good biocompatibility, functional silicon nanomaterials have increasingly attracted widespread attention from scientists (see: Nature 2000, 408, 440-444; Science 2002, 296, 1293-1297; Science 2003, 299, 1874-1877; Science 2006, 313, 1100-1104.). Of particular concern is that fluorescent silicon nanoparticles, as a representative zero-dimensional silicon nanomaterial, are expected to be widely used in biology and medicine because of their good biocompatibility and low toxicity (see: Science 2005, 307, 538-544; Chem. Roc. Rev. 2010, 39, 4234-4243; Nano Today 2010, 5, 282-295.). ...

Claims

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Application Information

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IPC IPC(8): C09K11/59G01N21/64B82Y40/00
Inventor 何耀钟旖菱
Owner SUZHOU UNIV
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