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Method for preparing double soluble noble metal nano particle

A nanoparticle and noble metal technology, which is applied in the field of preparation of double-soluble noble metal nanoparticles, can solve the problems of insolubility and other problems, and achieve the effects of rapid preparation, improved stability, and convenient biological application

Inactive Publication Date: 2007-04-11
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, so far there is still no method to obtain high concentrations of dual-dissolving noble metal nanoparticles
German scientist Caruso converted oil-soluble metal nanoparticles into water-soluble metal nanoparticles by chain exchange, but the nanoparticles are only soluble in water, not in oil

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] Preparation method of n-octadecylamine-protected gold nanoparticles. Draw 5.0mL of chloroauric acid (0.024M) solution with a pipette and place it in a beaker, heat and evaporate to dryness, add 0.054g of n-octadecylamine, then add 75mL of toluene to make the molar ratio of n-octadecylamine and chloroauric acid The ratio is 50:1, and the mixture is ultrasonically homogeneous. The obtained system was an orange-yellow clear solution, and 0.054 g of sodium borohydride aqueous solution (0.5 mL) was added under magnetic stirring. The solution turned red, and after continuing to stir for 12 hours, a purple gold sol was obtained.

[0055] The obtained gold sol was distilled to near dryness under reduced pressure, and 80 mL of absolute ethanol was added. The gold nanoparticles protected by n-octadecylamine precipitated after one night. n-octadecylamine and other impurities, and finally a black solid was obtained. After the sample was dried overnight in an oven at 50° C., the d...

Embodiment 2

[0057] Preparation of decylamine-protected gold nanoparticles. Draw 5.0mL of chloroauric acid (0.024M) solution with a pipette and place it in a beaker, heat and evaporate to dryness, add 0.024g of decylamine, then add 75mL of toluene, so that the molar ratio of n-decylamine to chloroauric acid is 50 : 1, mix and sonicate evenly. The obtained system was an orange-yellow clear solution, and 0.054 g of sodium borohydride aqueous solution (0.05 mL) was added under magnetic stirring. The solution turned red, and after continuing to stir for 12 hours, a red gold sol was obtained.

[0058] The obtained gold sol was distilled to near dryness under reduced pressure, and 80 mL of absolute ethanol was added, and the gold nanoparticles protected by n-decylamine precipitated after one night. Amines and other impurities were removed, and finally a black solid was obtained. After drying the sample in an oven at 50° C. overnight, the dried decylamine-protected gold nanoparticles were obtai...

Embodiment 3

[0060] Use a pipette to draw 5.0mL (0.024M) of silver nitrate solution into a beaker, heat and evaporate to dryness, add 0.054g of n-octadecylamine, then add 75mL of toluene to make the molar ratio of n-octadecylamine to chloroauric acid 50:1, mixed ultrasonically evenly. The obtained system was an orange-yellow clear solution, and 0.054 g of sodium borohydride aqueous solution was added under magnetic stirring. After continuing to stir for 12 hours, a yellow silver sol was obtained.

[0061] The obtained silver sol was distilled to nearly dryness under reduced pressure, and 80 mL of absolute ethanol was added, and the silver nanoparticles protected by n-octadecylamine precipitated after one night, and after the precipitate was separated by centrifugation, absolute ethanol was added and ultrasonically dispersed, and the free n-octadecylamine and other impurities, and finally a black solid was obtained. After the sample was dried overnight in an oven at 50° C., the dried silve...

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Abstract

The present invention is method of preparing double soluble nanometer noble metal particle with hydrophobic nanometer grain as core and through adsorption with polymer, and the method is especially suitable for preparing long hydrophobic chain alkane stabilized nanometer noble metal particle. The preparation process includes dissolving surfactant protected hydrophobic nanometer noble metal grain in chlorohydrocarbon, adding polymer, rotating evaporation to eliminate chlorohydrocarbon and collecting the solid product as the double soluble nanometer noble metal particle. The present invention raises the stability of the nanometer noble metal particle greatly and creates condition for the application of nanometer noble metal particle in biological and assembling fields.

Description

technical field [0001] The invention belongs to a method for preparing double-dissolving precious metal nanoparticles by taking hydrophobic nanoparticles as cores and absorbing high-molecular polymers. Especially suitable for noble metal nanoparticles and amphiphilic polymers stabilized by long hydrophobic alkanes. Background technique [0002] Noble metal nanoparticles have important applications in the fields of biology, electronics, catalysis, optics, etc., therefore, they have attracted the attention of researchers all over the world. [0003] So far, many methods for the synthesis of noble metal nanoparticles have been researched and developed, such as using different protective agents (alkylthiols, long-chain fatty amines, water-soluble polymers, etc.), different noble metal precursors and reducing agents, There are also different reducing environments, such as vapor phase synthesis and liquid phase synthesis. Among them, liquid-phase synthesis is the most, and the s...

Claims

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Application Information

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IPC IPC(8): B22F9/16
Inventor 李津如杨云江龙荣惠林
Owner INST OF CHEM CHINESE ACAD OF SCI
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