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Method for preparing nanometer material assembly

A nanomaterial and assembly technology, applied in the nano field, can solve the problems of complex steps and the inability to successfully assemble a variety of nanomaterials.

Inactive Publication Date: 2012-08-01
UNIV OF SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method has complicated steps and is only suitable for the assembly of nanowires, and cannot successfully assemble a variety of nanomaterials.

Method used

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  • Method for preparing nanometer material assembly
  • Method for preparing nanometer material assembly
  • Method for preparing nanometer material assembly

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preparation example Construction

[0029] The present invention has no particular limitation on the preparation method of the nanomaterial aqueous solution, and a method well known to those skilled in the art can be used, specifically: the nanomaterial is centrifuged and cleaned and dispersed in water to obtain the nanomaterial aqueous solution. The nano material used in the present invention may be a nano material well known to those skilled in the art, preferably one or more of gold nano particles, silver nano blocks, silver nano wires and graphene nano sheets. At the same time, the present invention has no special restrictions on the thickness, size, etc. of the aforementioned nanomaterials, and the sizes between the aforementioned nanomaterials may be the same or different. For example, the nanomaterial may be nanoparticles with different particle diameters, nanosquares, nanowires or ultra-thin nanosheets. In addition, the present invention has no special restrictions on the preparation method of the above-m...

Embodiment 1

[0038] Example 1: Preparation of gold (Au) nanoparticle assembly

[0039] 1. Synthesis of gold nanoparticles with a diameter of 12nm

[0040] Add 1.0 milliliters (mL) HAuCl 4 Mix the solution (1.0%wt) with 99mL of distilled water, and then heat to boil; in the case of boiling, quickly add 3.0mL of sodium citrate solution (1.0%wt) to generate nanoparticles; heated under reflux for 20min, the color of the solution Change from yellow to wine red, and then cool the solution at room temperature to obtain gold nanoparticles with a diameter of 12 nm.

[0041] 2. Preparation of nanomaterial assembly

[0042] 5mg gold nanoparticles were dispersed in 5mL distilled water, and 5mL of the nanomaterial aqueous solution prepared above was covered in 5mL of carbon tetrachloride (CCl 4 ) Above, a liquid-liquid interface is formed between the two; 1 mL of ethanol is added to the nanomaterial aqueous solution, and after shaking, a self-assembled film, namely, a gold nanomaterial assembly, is quickly for...

Embodiment 2

[0045] 1. Synthesis of gold nanoparticles with a diameter of 5nm

[0046] Pipette 0.1 mL of HAuCl 4 The solution (0.05M) and 0.1mL of sodium citrate aqueous solution (0.05M) were added to 20mL of distilled water and stirred evenly; then, while stirring, 0.6mL of frozen storage NaBH was added 4 Solution (0.1M); add NaBH 4 Afterwards, the solution immediately turned pink, indicating that gold particles were formed; after stirring for 10 minutes, let it stand at room temperature for 3 hours to obtain gold nanoparticles with a diameter of 5 nm.

[0047] 2. Preparation of nanomaterial assembly

[0048] 5mg gold nanoparticles were dispersed in 5mL distilled water, and 5mL of the nanomaterial aqueous solution prepared above was covered in 5mL of carbon tetrachloride (CCl 4 ) Above, a liquid-liquid interface is formed between the two; 1 mL of ethanol is added to the nanomaterial aqueous solution, and then a layer of self-assembled film, namely, a gold nanomaterial assembly is quickly formed b...

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Abstract

The invention discloses a method for preparing a nanometer material assembly. The method comprises the following steps of: mixing a nanometer material aqueous solution and an organic solvent A, adding a solvent B, and oscillating to obtain the nanometer material assembly. In the preparation process of the nanometer material assembly, water in the nanometer material aqueous solution and the solvent A form a liquid-liquid interface, so that an assembly platform is constructed for preparing the nanometer material assembly; and by adding the solvent B, the ambient environment of a nanometer material is changed, the tension of the interface is changed, and the polarity of the aqueous solution and the solvent A can be changed, so that the enrichment and assembly of the nanometer material from the aqueous solution to the interface are promoted, and the nanometer material assembly is prepared. Compared with the prior art, the method is simple, has the characteristics of economy and quickness, and is suitable for preparing various nanometer material assemblies.

Description

Technical field [0001] The invention relates to the field of nanotechnology, and more specifically, to a method for preparing a nanomaterial assembly. Background technique [0002] Nanomaterials refer to materials that have at least one dimension in the nanoscale range (1-100nm) in a three-dimensional space or are composed of them as basic units. On the one hand, nanomaterials have a high surface-to-volume ratio, and thus have high chemical activity; on the other hand, taking nanowires as an example, they have a high aspect ratio, and there is no particle transport in one dimension. Constraints are conducive to technical applications. In addition, the British "Nature Materials" (Nature Materials, 2007, Issue 6, page 841) pointed out that the development of the physical and chemical properties of materials not only depends on their own shape and size, but also on the coordination of the assembly. US "Nano Letters" (2010, Issue 10, page 5103) pointed out that the use of interface...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B82B3/00B82Y40/00
Inventor 俞书宏刘建伟黄巍然
Owner UNIV OF SCI & TECH OF CHINA
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