Preparation method of surface enhanced raman spectrum substrate of gold nanoparticle embellished diamond film

A surface-enhanced Raman and diamond film technology, applied in Raman scattering, material excitation analysis, etc., to achieve high bonding strength, high uniformity and stability, and good repeatability

Inactive Publication Date: 2013-07-24
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there is no report in the prior art on the self-assembly of gold nanoparticles on the surface of diamond films and their use as active substrates for surface-enhanced Raman spectroscopy.

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  • Preparation method of surface enhanced raman spectrum substrate of gold nanoparticle embellished diamond film
  • Preparation method of surface enhanced raman spectrum substrate of gold nanoparticle embellished diamond film
  • Preparation method of surface enhanced raman spectrum substrate of gold nanoparticle embellished diamond film

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[0017] The invention provides a surface-enhanced Raman spectrum active substrate of a gold nanoparticle-modified diamond film and a preparation method thereof. The surface of the diamond film is activated by an ultraviolet photochemical reaction method, and amino groups are introduced into the surface; Surface self-assembly of gold nanoparticles to form a surface-enhanced Raman spectroscopy substrate material with high stability gold nanoparticles modified diamond film, specifically including the following steps:

[0018] Step 1. Cleaning the surface of the nano-diamond film; specifically: first immerse the nano-diamond film in a mixed solution of acetone and ethanol for ultrasonic cleaning, then put it into deionized water for ultrasonic cleaning, and then dry it with nitrogen.

[0019] Step 2. Activate the nano-diamond film whose surface is cleaned to form a nano-diamond film whose surface is amino terminal; specifically:

[0020] Put the cleaned nano-diamond film sample int...

Embodiment 1

[0027] The surface of the nano-diamond film is activated by ultraviolet photochemical reaction method, and amino groups are introduced on the surface; then gold nanoparticles are further self-assembled on the surface of the amino-modified nano-diamond film to form a surface-enhanced gold nano-particle-modified nano-diamond film with high stability. The Raman spectrum base material specifically comprises the following steps:

[0028] Step 1, cleaning the surface of the nano-diamond film. The specific operation is as follows: first, immerse the nano-diamond film in a mixed solution of acetone and ethanol for ultrasonic cleaning, then put it into deionized water for ultrasonic cleaning, and then dry it with nitrogen.

[0029] Step 2. Put the cleaned nano-diamond film sample into a polytetrafluoroethylene reactor, then drop an appropriate amount of allylamine solution into the reactor, and make the liquid level 1-2mm higher than the surface of the film. Seal the polytetrafluoroet...

Embodiment 2

[0035] The surface of the nano-diamond film is activated by ultraviolet photochemical reaction method, and amino groups are introduced on the surface; then gold nanoparticles are further self-assembled on the surface of the amino-modified nano-diamond film to form a surface-enhanced gold nano-particle-modified nano-diamond film with high stability. The Raman spectrum base material specifically comprises the following steps:

[0036] Step 1, cleaning the surface of the nano-diamond film. The specific operation is as follows: first, immerse the nano-diamond film in a mixed solution of acetone and ethanol for ultrasonic cleaning, then put it into deionized water for ultrasonic cleaning, and then dry it with nitrogen.

[0037] Step 2. Put the cleaned nano-diamond film sample into a polytetrafluoroethylene reactor, then drop an appropriate amount of allylamine solution into the reactor, and make the liquid level 1-2mm higher than the surface of the film. Seal the polytetrafluoroet...

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Abstract

The invention discloses a preparation method of a surface enhanced raman spectrum substrate of a gold nanoparticle embellished diamond film. The diamond film has the extreme physicochemical property, the good biocompatibility and chemical stability, and a gold nanoparticle has a surface enhanced raman spectrum effect. The invention provides the surface enhanced raman spectrum substrate of the gold nanoparticle embellished diamond film and a preparation method of the surface enhanced raman spectrum substrate. The surface enhanced raman spectrum substrate is composed of the diamond film and gold nanoparticles embellished on the diamond film, wherein the surface of the diamond film is subjected to activating treatment through an ultraviolet light chemical reaction method, an amidogen is introduced on the surface of the diamond film, and a layer of gold nanoparticles which are uniformly distributed are assembled on the surface of the amidogen-embellished diamond film, so that the surface enhanced raman spectrum substrate material of the gold nanoparticle embellished diamond film with high stability is formed. The surface enhanced raman spectrum active substrate provided by the invention has the advantages that the preparation is simple, the stability is high, the raman enhancing effect is good, and the preparation method is applied to material trace analysis and molecular detection, chemistry and biosensing, biomedicine detection and the like.

Description

technical field [0001] The invention belongs to the technical field of laser Raman spectrum detection substrates, and in particular relates to a highly stable surface-enhanced Raman spectrum active substrate of gold nanoparticle-modified diamond film and a preparation method thereof. Background technique [0002] Surface-enhanced Raman scattering (Surface Enhanced Raman Scattering, SERS) is a kind of Raman scattering, which uses the abnormal optical enhancement effect of nanoscale rough surface or particle system, that is, on some metal surfaces, Raman scattering of surface adsorbed species The signal can be abnormally enhanced, the effect of this enhancement can be as high as 10 6 times. Since the first observation of surface-enhanced Raman scattering on the surface of a rough silver electrode adsorbed with pyridine molecules in 1974, SERS research has developed rapidly. The reason for the signal enhancement is not only that the surface area of ​​the rough surface increas...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/65
Inventor 邹友生何林林张亦弛朱正峰石晓琴董宇辉涂承君
Owner NANJING UNIV OF SCI & TECH
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