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Method for preparing amphiphilic Janus gold nano particles in one step with liquid/liquid interface reaction

A gold nanoparticle and nanoparticle technology, applied in the direction of nanotechnology, can solve the problems of complex and complicated post-processing, high dependence on instruments and equipment, and achieve good stability and reproducibility, and simple and easy operation

Inactive Publication Date: 2014-03-05
GUILIN UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the preparation methods of amphiphilic Janus nanoparticles are generally complicated, highly dependent on instruments and equipment, and post-processing is more complicated; at the same time, the prepared amphiphilic Janus particles generally spontaneously aggregate, and it is difficult to obtain dispersed Janus particles. technical problems with the application

Method used

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Examples

Experimental program
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Effect test

Embodiment

[0013] (1) Prepare toluene solution containing 1.5 mmol / L triphenylphosphorus gold chloride, 31.25 mmol / L sodium hydroxide aqueous solution and 50 mmol / L tetrakishydroxymethylphosphorus chloride aqueous solution for later use.

[0014] (2) Add 8 mL of the sodium hydroxide solution obtained in step (1) to a glass bottle of 75 mm×φ25 mm, and then add 5 mL of the triphenylphosphorus gold chloride solution obtained in step (1); when the two are immiscible After the interface of the solution was stable, 165 μL of tetrakishydroxymethylphosphorus chloride aqueous solution obtained in step (1) was slowly injected into the water phase with a pipette to initiate the reaction, and then left to stand at room temperature for 24 hours, forming a Self-assembled films of amphiphilic Janus gold nanoparticles.

[0015] (3) Remove the amphiphilic Janus gold nanoparticle self-assembled film formed by the reaction in step (2) from the toluene / water interface with a glass slide, dry it at room temp...

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PUM

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Abstract

The invention discloses a method for preparing amphiphilic Janus gold nano particles in one step with a liquid / liquid interface reaction. The method for preparing the amphiphilic Janus gold nano particles in one step with the liquid / liquid interface reaction comprises the steps of (1) preparing a toluene solution, a sodium hydroxide aqueous solution and a tetrakis hydroxymethyl phosphonium chloride aqueous solution for use, wherein the concentration of chloro(triphenylphosphine)gold in the toluene solution is 1-5mmol / L, the concentration of the sodium hydroxide aqueous solution is 10-40mmol / L, and the concentration of the tetrakis hydroxymethyl phosphonium chloride aqueous solution is 50mmol / L; (2) mixing a sodium hydroxide solution of 5-10mL and the toluene solution, of 5-10mL, with the chloro(triphenylphosphine)gold, injecting the tetrakis hydroxymethyl phosphonium chloride aqueous solution into an aqueous phase, and standing for 20-24 hours to form an amphiphilic Janus gold nano particle self-assembled membrane, wherein the volume of the tetrakis hydroxymethyl phosphonium chloride aqueous solution ranges from 100 micro-litres to 200 micro-litres; (3) moving the amphiphilic Janus gold nano particle self-assembled membrane out of a toluene / water interface through a glass slide, drying the amphiphilic Janus gold nano particle self-assembled membrane, respectively cleaning the amphiphilic Janus gold nano particle self-assembled membrane with water and acetone, drying the amphiphilic Janus gold nano particle self-assembled membrane again, placing the glass slide with the amphiphilic Janus gold nano particle self-assembled membrane into analytically pure N,N-dimethylformamide of 10mL, and carrying out ultrasonic oscillation for 10min to obtain a monodisperse amphiphilic Janus gold nano particle colloidal solution. According to the method for preparing the amphiphilic Janus gold nano particles in one step with the liquid / liquid interface reaction, operation is easy, good stability and good reproducibility are achieved, and the amphiphilic Janus gold nano particles can be conveniently applied to various related fields.

Description

technical field [0001] The invention relates to a method for one-step preparation of amphiphilic Janus, that is, double-faced gold nanoparticles, by using a liquid / liquid interface reaction. Background technique [0002] Anus originally meant the "double-faced god" of ancient Rome. French physicist De Gennes (De Gennes) used it for the first time at the 1991 Nobel Prize Awarding Conference to describe a class of two hemispheres with asymmetrical shapes or chemical properties. particle. Janus particles can be divided into snowman-shaped, acorn-shaped, dumbbell-shaped, two-component particles, half-raspberry-shaped, etc. according to the shape of the particles, and can also be divided into amphiphilic Janus particles with hydrophobic and hydrophilic partitions according to the surface properties of the particles. particles and bipolar Janus particles with positive and negative charge partitions. Two-sidedness enables Janus particles to form special structures, especially amp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/24B82Y40/00
Inventor 罗鲲王海明桑超王鹏黄涛
Owner GUILIN UNIVERSITY OF TECHNOLOGY
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