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Preparation method of self-assembly material having surface-enhanced Raman activity

A surface-enhanced Raman, self-assembly technology, applied in the field of materials chemistry

Inactive Publication Date: 2012-05-23
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This enables single-molecule detection

Method used

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  • Preparation method of self-assembly material having surface-enhanced Raman activity
  • Preparation method of self-assembly material having surface-enhanced Raman activity
  • Preparation method of self-assembly material having surface-enhanced Raman activity

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] Synthesis of gold nanoparticles

[0062] The synthesis scheme of gold nanoparticles is as follows: add 95mL of water to a clean Erlenmeyer flask, then add 5mL of chloroauric acid with a concentration of 2g / L to the water, heat, boil, and then add 2.5mL of 1% trisodium citrate Solution, stirring while heating, the solution color changes from light yellow to red, and the reaction continues for 6-8 minutes so that trisodium citrate settles completely. Finally, the solutions were cooled to room temperature, diluted to 100 mL, and stored at 4°C. That is, 18nm gold nanoparticles were produced.

[0063] Synthesis of gold nanorods

[0064] The synthesis scheme of gold nanorods is:

[0065] All glass instruments were soaked in strong acid, rinsed with double distilled water, and dried for later use. Au nanorods with an aspect ratio of 3.0 were synthesized by seed crystal growth method. The water used in the experiment was 18.2 MΩ Milli-Q ultrapure water.

[0066] Seed c...

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Abstract

The invention relates to a preparation method of a self-assembly material having surface-enhanced Raman activity, belonging to the technical field of material chemistry. The preparation method comprises the following steps: synthesizing gold nano particles; synthesizing gold nano rods; modifying DNA (deoxyribonucleic acid) 1 with the gold nano particles; modifying DNA 2 with the gold nano rods; coupling the gold nano rods with Raman beacon molecules; and assembling and characterizing the gold nano rods and the gold nano particles. The nano material assembly body prepared by the invention has a uniform and controllable assembly structure and has Raman activity, thereby making monomolecular detection possible.

Description

technical field [0001] The invention discloses a method for preparing a self-assembled material with surface-enhanced Raman activity, belonging to the technical field of material chemistry. Background technique [0002] Nanomaterials refer to materials with at least one dimension in the nanometer scale (1-100nm) in three-dimensional space, or materials composed of them as basic units, which is approximately equivalent to the scale of 10-100 atoms closely arranged together. It is a new generation of materials composed of nanoparticles whose size is between atoms, molecules and macroscopic systems. Since the size of nanomaterials is close to the de Broglie wavelength of electrons, the superconducting coherence wavelength, and the Bohr radius of excitons, electrons are confined to a very small space, and their wave functions are limited. In addition, they have a large surface area. Therefore, nanomaterials show novel optical, electrical, magnetic and chemical properties differ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C12N15/11
Inventor 王利兵胥传来徐丽广马伟陈伟胡拥明屈昌隆刘丽强朱颖越
Owner JIANGNAN UNIV
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