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Nano metal leaf and preparation method thereof

A technology of nano-metal and nano-metal particles, applied in the fields of nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problems of inability to large-scale production, complex and multi-step preparation process, harsh experimental conditions, etc. To achieve the effect of easy control of reaction conditions, good dispersion and uniform size

Inactive Publication Date: 2012-04-18
SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the current work in this area is still in its infancy, and some shortcomings still need to be resolved, such as: when nanoparticles are assembled into two-dimensional structures or even three-dimensional structures, the preparation process is complex and multi-step, the required experimental conditions are harsh, and large-scale production cannot be achieved.

Method used

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  • Nano metal leaf and preparation method thereof
  • Nano metal leaf and preparation method thereof
  • Nano metal leaf and preparation method thereof

Examples

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Embodiment 1

[0034] Example 1 The technical scheme of the present embodiment is: prepare the nano-silver particles of high monodispersity (such as Figure 1A shown), with a diameter of 4 ± 0.1 nm, and then disperse it in a certain amount of cyclohexane; then, take 50 μL of cyclohexane solution containing nano-silver particles (50 mM) and 400 μL containing p-mercaptoaniline (50 mM) ethanol solution was mixed and reacted at room temperature for 4 hrs; after the reaction was completed, a polar solvent (such as ethanol) was added, centrifuged (10000 rpm, 5 minutes), washed and dried (60 ℃) to obtain a layer The shape and performance of nano-silver leaves with a structure are shown in Figure 1-4.

Embodiment 2

[0035] Example 2The technical solution of this embodiment is: prepare highly monodisperse gold nanoparticles with a diameter of 13 nm by thermal reduction, and then disperse them in a certain amount of n-hexane; then, take 100 μL containing gold nanoparticles (40 mM) n-hexane solution was mixed with 1000 μL N-methylpyrrolidone solution containing 3-mercaptobenzoic acid (40 mM), and reacted at room temperature for 6 hrs; after the reaction was completed, a polar solvent (such as ethanol) was added, and the After centrifugation (10000 rpm, 5 minutes), washing and drying (60 ℃), the product was dispersed in water to obtain a layered structure of gold nano leaves.

Embodiment 3

[0036] Example 3 The technical solution of this embodiment is: prepare highly monodisperse nano-copper particles with a diameter of 7.1 ± 0.5 nm by hydrothermal method, and then disperse them in a certain amount of dimethyl sulfoxide; then, take 50 μL containing The dimethyl sulfoxide solution of copper nanoparticles (20 mM) was mixed with 800 μL of methanol solution containing L-cysteine ​​(80 mM), and reacted at room temperature for 20 hrs; after the reaction was completed, a polar solvent ( Such as ethanol), after centrifugation (10000rpm, 5 minutes), washing and drying (80 ℃), the nano-copper leaves with layered structure are obtained.

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Abstract

The invention discloses a nano metal leaf and a preparation method thereof. Pure nano metal particles with controllable morphology and size are mixed and reacted at room temperature with a surface modifier which is dispersed in a polar organic solvent and has more than two active functional groups, and the nano metal leaf using the nano metal as a skeleton is obtained after the reaction is finished, wherein the radial size of the nano metal leaf is in several microns, the thickness of the nano metal leaf is in dozens of nanometers, and the nano metal leaf has laminar structure. The nano metalleaf is prepared at room temperature in one step by mixing different polar solvents, adding the specific surface modifier into the mixed polar solvent and adjusting the decomposition and self-assembly processes of the nano metal crystal; the prepared nano metal leaf has the advantages of uniform size, high controllability, high yield and good dispersibility in the polar inorganic solvent; the reaction conditions are easily controlled; and the nano metal leaf can be produced in a large scale.

Description

technical field [0001] The invention relates to a preparation method of a nano metal material, in particular to a method for forming a nano metal leaf by self-assembly of a monodisperse nano metal, and belongs to the technical field of material chemistry. Background technique [0002] Nanoscale noble metal or semiconductor particles have been widely used in semiconductors, biomedicine, photoluminescent devices, solar cells, infrared detectors, optical fiber communications, pigments, lubricants, etc. due to their excellent optical, electrical, magnetic, and catalytic properties. medicines and other fields. The application of nanometer metal or semiconductor particles is becoming more and more widespread, making the preparation method of noble metal or semiconductor particles a focus of attention. These nanoparticles are further assembled into a two-dimensional structure or even a three-dimensional structure, because they will exhibit some optical, electrical, magnetic, catal...

Claims

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Application Information

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IPC IPC(8): B22F1/00B82Y40/00B82Y30/00
Inventor 王强斌李轮
Owner SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI
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