Method for preparing gold nanoparticles by annealing of gold film

A nanoparticle and gold preparation technology, applied in nanotechnology, metal material coating process, ion implantation plating, etc. Irregular appearance and other problems, to achieve the effect of no coating on the surface, regular appearance and simple process

Inactive Publication Date: 2012-12-05
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The traditional preparation methods of gold nanoparticles are mainly divided into two categories. One is to prepare gold nanoparticles by mechanical grinding. This method can be prepared on a large scale and has high yield. However, due to the uncontrollability of the microscopic The morphology cannot be effectively controlled, often resulting in irregular microscopic morphology, poor monodispersity, and unsatisfactory photoelectric performance.

Method used

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  • Method for preparing gold nanoparticles by annealing of gold film
  • Method for preparing gold nanoparticles by annealing of gold film

Examples

Experimental program
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Effect test

example 1

[0027] Depositing Gold Nanofilms by Magnetron Sputtering

[0028] Cleaning glass substrate materials

[0029] The glass substrate material 1 is first cleaned with a detergent, and then ultrasonically cleaned with acetone, isopropanol, and alcohol for 30 minutes, 15 minutes, and 10 minutes in sequence. Blow dry with nitrogen after cleaning.

example 2

[0031] Depositing Gold Nanofilms by Vacuum Evaporation

[0032] Put the cleaned base material 1 on the sample platform of the vacuum evaporation chamber, take 0.0455g of gold wire with a purity of 99.99% and put it into the molybdenum boat as the evaporation source, and make the distance between the evaporation source and the sample platform Keep it around 56 cm. After the evaporation source and sample are placed, the cavity vacuum of the vacuum evaporation chamber is evacuated to 5×10 by mechanical pump and molecular pump. -4 Turn on the evaporation current and control the evaporation speed so that the complete evaporation time is 5 minutes. After evaporating, wait for cooling for about 10 minutes, open the cavity, and take out the sample. At this time, a layer of gold nano film 2 is uniformly deposited on the surface of the base material 1 .

Embodiment 3

[0034] Preparation of gold nanoparticles by annealing method

[0035] After depositing a layer of gold nano film 2 on the base material 1 by magnetron sputtering and vacuum evaporation, before putting it into the annealing furnace, use a nitrogen gun to purge the sample several times to ensure that no dust is deposited on the sample base . Put it into the annealing furnace, and pump the vacuum of the annealing furnace to 1×10 -2 Then flow nitrogen gas to maintain normal pressure. The temperature in the furnace was evenly heated to 450 oC within 15 minutes by means of gradual heating, and maintained for 1 hour. After heating, continue to flow nitrogen and cool to room temperature. After the cooling is completed, the annealing furnace is opened to take out the sample. At this point, a layer of gold nanoparticles 3 is prepared on the base material.

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Abstract

The invention discloses a method for preparing gold nanoparticles by annealing of a gold film. The method comprises the following steps: depositing a gold nano film (2) on a base material (1) by a magnetron sputtering method or vacuum evaporation method, wherein the vacuum degree of a magnetron sputtering chamber or a vacuum evaporation chamber is 10<-3>-10<-4>Pa, and the thickness of the deposited gold nano film (2) is 5-20nano; integrally arranging the deposited gold nano film (2) and the base material (1) in an annealing furnace to be heated for 30-120min, wherein the heating temperature is 350-600 DEG C; and cooling to the room temperature, and forming gold nanoparticles (3) on the base material (1). According to the invention, through controlling the thickness of the gold film, the annealing temperature, the annealing time and other parameters, the gold nanoparticles in different sizes and shapes can be obtained. The method disclosed by the invention has the advantages that the preparation is simple, the sizes and the shapes of the nanoparticles can be controlled, the preparation efficiency is high, and the like.

Description

technical field [0001] The invention belongs to the technical field of nanometer material preparation, and relates to a method for preparing gold nanoparticles by annealing gold films. Background technique [0002] In recent years, metal nanoparticles, especially gold or silver nanoparticles, have aroused widespread interest in the field of nanotechnology due to their unique optical, electrical, mechanical, catalytic and biocompatibility properties. It has great application prospects in the fields of capacitive devices, sensors, single molecule detection, photovoltaic efficiency and composite materials. [0003] The traditional preparation methods of gold nanoparticles are mainly divided into two categories. One is to prepare gold nanoparticles by mechanical grinding. This method can be prepared on a large scale and has high yield. However, due to the uncontrollability of the microscopic The morphology cannot be effectively controlled, often resulting in irregular microscop...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/02C23C14/58C23C14/14B82Y40/00
Inventor 张彤郭新立朱圣清林梦娜王洋洋
Owner SOUTHEAST UNIV
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