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Method for preparing ferroferric oxide/gold nano-composite particles of star-like structure in micro-emulsion

A technology of triiron tetroxide and composite particles, which is applied in the field of nanomaterials, can solve the problems of long use time and difficult control, and achieves the effects of convenient morphology, simple steps and mild reaction conditions.

Inactive Publication Date: 2015-06-24
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, some researchers have successfully coated star-shaped nano-gold shells on Fe 3 o 4 core, but the composite nanoparticle synthesis methods used in these literatures involve multiple reaction steps and require the synthesis of gold nanoparticles (Au NPs) attached to Fe 3 o 4 As a gold species, it takes a long time and is not easy to control

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  • Method for preparing ferroferric oxide/gold nano-composite particles of star-like structure in micro-emulsion
  • Method for preparing ferroferric oxide/gold nano-composite particles of star-like structure in micro-emulsion
  • Method for preparing ferroferric oxide/gold nano-composite particles of star-like structure in micro-emulsion

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Experimental Materials

[0026] Cyclohexane, polyethylene glycol octylphenyl ether, n-hexanol, Fe 3 o 4 Nanoparticles, HAuCl 4 , Hydroxylamine.

[0027] Experimental procedure

[0028] The first step: prepare two water-in-oil microemulsions: each part is prepared from 33.33 ml cyclohexane, 10 ml polyethylene glycol octylphenyl ether and 6.67 ml n-hexanol (wherein n-hexanol and polyethylene glycol The volume ratio of alcohol octyl phenyl ether is 1:1.5, the volume ratio of the mixture of n-hexanol and polyethylene glycol octyl phenyl ether to cyclohexane is 1:2), mix and stir for 5 min.

[0029] Step 2: Slowly add 2ml (4% of the total volume of microemulsion) HAuCl to a portion of water-in-oil microemulsion 4 Aqueous solution, HAuCl 4 The aqueous solution has 7 different concentrations, namely 20 mM, 30 mM, 40 mM, 60 mM, 80 mM, 100 mM and 120 mM. Stir for 10 min to mix well to make HAuCl 4 For microemulsion, slowly add 2ml (4% of the total volume of microe...

Embodiment 2

[0043] in Fe 3 o 4 A coating layer is prepared on the surface of the nanoparticles, and the coating layer is SiO 2

[0044] Experimental Materials

[0045] Fe 3 o 4 Nanoparticles, Tetraethyl Orthosilicate, Absolute Ethanol, NaOH

[0046] Experimental procedure

[0047] Use NaOH to adjust the pH value of deionized water to 8-9, and the water-soluble Fe 3 o 4 Nanoparticles are dispersed therein to form a suspension at a concentration of 1 mg / ml. Tetraethyl orthosilicate was added to make Fe 3 o 4 The volume ratio of the suspension to tetraethyl orthosilicate is 10:1, shake and mix for 2-3 hours. After washing with ethanol and deionized water, the coated SiO 2 Fe 3 o 4 Nanoparticles.

[0048] Coated SiO 2 Fe 3 o 4 Synthesis of Fe by Nanoparticles in Microemulsion 3 o 4 / Au nanocomposite particles, the synthesis method is the same as in Example 1.

Embodiment 3

[0050] in Fe 3 o 4 A coating layer is prepared on the surface of the nanoparticles, and the coating layer is bovine serum albumin

[0051] Experimental Materials

[0052] Fe 3 o 4 Nanoparticles, bovine serum albumin (BSA), ethanol, glutaraldehyde

[0053] Experimental procedure

[0054] 200ul 0.1mg / ml water-soluble Fe 3 o 4 The nanoparticle suspension was dispersed in 2 mg / ml bovine serum albumin (BSA) aqueous solution such that the total volume was 5 ml. Under the action of ultrasound, slowly add 5 ml ethanol dropwise to Fe 3 o 4 20 ul of 5% glutaraldehyde was finally added to the BSA suspension. Ethanol was removed by rotary evaporation and centrifuged to obtain Fe coated with BSA 3 o 4 Nanoparticles.

[0055] Fe coated with BSA 3 o 4 Synthesis of Fe by Nanoparticles in Microemulsion 3 o 4 / Au nanocomposite particles.

[0056] Experimental Materials

[0057] Cyclohexane, polyethylene glycol octylphenyl ether, n-hexanol, Fe coated with BSA 3 o ...

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Abstract

The present invention involves a method of micro -milk medium -shaped structure of four -iron / gold nano -composite particles.The oil bun water micro -milk; drip the chlorine tinnoswater solution to a part of the oil bag, add the tetraxide three -iron solution to another oil envelope micro -milkThe Moore is 1: (5-30), and the mixing is evenly made into four iron dioxide micro -milk; mixing the two equal amounts of micro -milk, add the reducing agent until the solution is discolored; / Gold nano composite particles.The advantage is: choose the appropriate micro-milk system, use a simple step to obtain a nuclear-shell composite particle, the response conditions are mild, the surface of the composite nanoparticle has a star-like protrusion, and the reaction conditions can be easily controlled by changing the reaction conditions to control the surface easily.Star -like protruding size and appearance.

Description

technical field [0001] The invention relates to the field of nanomaterials, and is a method for synthesizing composite nanoparticles, in particular to a method for preparing star-shaped ferroferric oxide / gold nanocomposite particles in microemulsions. Background technique [0002] Today, with the rapid development of nanotechnology, composite nanodevices have attracted much attention because they can integrate the advantages of various aspects. Among them, gold-shell-coated magnetic nanocomposite particles combine the magnetic properties of magnetic nanoparticles and the photothermal conversion effect of gold nanoparticles, and are widely used in the fields of tumor imaging and treatment, drug delivery, and immune analysis. current research hotspot. Trying to increase the specific surface area of ​​the gold shell can make the composite nanoparticles have various special shapes, so that they have some superior properties. Schütz et al. coated gold / silver nanoshells on the s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F9/24
Inventor 沃芳洁储茂泉
Owner TONGJI UNIV