Preparation method of nanostar dimmer with surface raman strengthening activities

A surface Raman-enhanced, dimer technology, applied in the field of material chemistry, can solve the problem of lack of high sensitivity

Active Publication Date: 2013-01-16
JIANGNAN UNIV
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Problems solved by technology

The signal of traditional Raman scattering spectroscopy is weak, and it often lacks high sensitivity as a means of information readout

Method used

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  • Preparation method of nanostar dimmer with surface raman strengthening activities
  • Preparation method of nanostar dimmer with surface raman strengthening activities

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] All glass instruments were soaked overnight in aqua regia, rinsed with double distilled water, and dried for later use. The water used in the experiment was 18.2 MΩ Milli-Q ultrapure water.

[0036] Gold Synthesis

[0037] Gold seed synthesis scheme: add 48.75mL of water to a clean Erlenmeyer flask, then add 1.25mL of chloroauric acid with a concentration of 4g / L to the water, heat, boil, and then add 1.2mL of 1% citric acid tris Sodium solution, stirred while heating, the solution color changed from light yellow to red, continued to react for 6 minutes and cooled to room temperature, added 0.3g polyvinylpyrrolidone to the solution, stirred overnight to make it fully coated on the gold nanoparticles. Finally, the solution was centrifuged at 6000 rpm for 40 min, the supernatant was removed, and the precipitate was resuspended in 4 mL of ethanol, which was the gold seed solution.

[0038] Synthesis of gold nanostars

[0039] The synthesis scheme of gold nanostars: Accu...

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Abstract

The invention discloses a preparation method of a nanostar dimmer with surface raman strengthening activities and belongs to the technical field of materials chemistry. The method includes synthesizing gold seeds, synthesizing gold nanostars which modify deoxyribonucleic acid (DNA) 1 and DNA 2 respectively, and assembling gold nanostars modified by the DNA 1 and the DNA 2. The synthesized gold nanostars are plasma resonators and form a gold nanostar dimmer structure by means of coupling of complementary DNA chains. According to the method, self-assembly of the plasma gold nanostars is achieved, and the prepared gold nanostar dimmer is uniform in structure.

Description

technical field [0001] The invention discloses a method for preparing a nanostar dimer with surface Raman enhanced activity, which belongs to the technical field of material chemistry. Background technique [0002] As a kind of inelastic scattering spectrum, Raman spectroscopy analyzes the vibration and rotation of molecules through the scattering spectrum different from the incident light frequency, and can provide information about various normal vibration frequencies and vibrational energy levels inside the molecule. The signal of traditional Raman scattering spectroscopy is weak, and it often lacks high sensitivity as a means of information readout. The discovery and confirmation of the surface-enhanced Raman scattering (SERS) effect on Au, Ag, and Cu in the mid-to-late 1970s injected new vitality into the research and application of Raman spectroscopy. It has been reported that some substances with sharp edges and pointed structures can significantly enhance surface Ra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07H21/04C07H1/00
Inventor 胥传来孙茂忠王利兵马伟匡华徐丽广赵媛
Owner JIANGNAN UNIV
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