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Method for preparing multipurpose isoionic gold nanoparticle film

A technology of gold nanoparticles and plasma, applied in the field of material chemistry, can solve the problems of insufficient research and achieve the effect of regular membrane structure surface

Inactive Publication Date: 2013-09-18
JIANGNAN UNIV
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

But for gold nanoparticles, not enough research

Method used

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  • Method for preparing multipurpose isoionic gold nanoparticle film
  • Method for preparing multipurpose isoionic gold nanoparticle film
  • Method for preparing multipurpose isoionic gold nanoparticle film

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Embodiment Construction

[0032] (1) Synthesis of DNA-modified gold nanoparticles

[0033] Preparation of chloroauric acid aqueous solution: Dissolve 1 g of chloroauric acid in 500 mL of double-distilled water once to prepare a 5 mM solution. The gold nanoparticles were prepared by reducing chloroauric acid with trisodium citrate. The 12-C DNA and 12-G DNA used in the present invention were purchased from Shanghai Sangon Bioengineering Co., Ltd., China, and purified by high performance liquid phase. All glass instruments were soaked in aqua regia, washed with ultrapure water, and dried for later use.

[0034] Synthesis of DNA-modified gold nanoparticles:

[0035] a. 1.9mL of Milli-Q ultrapure water, 0.1mL of HAuCl 4 Add the solution (concentration 5mM) into the reaction glass bottle and mix well at 37.0°C;

[0036] b1. Add 20 μL of 50 μM 12-C sequence DNA to a portion of the mixed system obtained in step a, and stir and mix at 37.0 °C for 15 min;

[0037] b2. Add 20 μL of 50 μM 12-G sequence DNA t...

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Abstract

The invention discloses a method for preparing a multipurpose isoionic gold nanoparticle film and belongs to the technical field of material chemistry. By using a gold nanoparticle modified by deoxyribonucleic acid (DNA), the gold nanoparticle is assembled layer by layer in the process of complimentary hybridization of the DNA, and the gold nanoparticle film is prepared; the gold nanoparticle film is represented through a scanning electron microscopy and an atomic force microscope, so that the surface of the prepared film is regular and homogeneous, and the thickness of the film is about 1 micrometer; and the prepared gold nanparticle film is subjected to mechanical property test, the hardness of the film can be tested greatly higher than that of the original gold nugget through a test performed by a nano indenter, and the Young modulus is 80.85 GPa. The gold nanoparticle film can be well applied to nano sensors and high-strength materials in the future.

Description

technical field [0001] The invention discloses a method for preparing a multipurpose plasma gold nanoparticle film, which belongs to the technical field of material chemistry. Background technique [0002] Gold nanoparticles have been widely studied by scientists in recent decades because of their excellent optoelectronic properties. These properties of gold nanoparticles have been applied to the fields of optics, biosensors, catalytic science, and programmed assembly. Although the optical and electronic properties of gold nanoparticles and films composed of gold nanoparticles have been studied and evaluated, the mechanical properties of gold nanoparticle films have not been well studied. [0003] Layer-by-layer assembly technology is a general method to control the internal structure of materials by designing materials at the nanoscale. Since the 1990s, this technology has been widely used to produce advanced coatings and composites. Nanomaterials, including inorganic mol...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F9/24B82Y40/00
Inventor 胥传来朱颖越王利兵匡华徐丽广马伟许宙徐乃丰
Owner JIANGNAN UNIV