Method using gamma radiation for preparing nano-silver surface-enhanced Raman spectrum substrate

A surface-enhanced Raman and nano-silver technology, applied in the process of producing decorative surface effects, Raman scattering, and manufacturing microstructure devices, etc., can solve the problems of poor signal uniformity, complex preparation process, low sensitivity, etc. The effect of strong Raman signal, high detection sensitivity and low price

Active Publication Date: 2013-07-03
TECHN PHYSICS INST HEILONGJIANG ACADOF SCI
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention aims to solve the technical problems of poor signal uniformity, low sensitivity, complex preparation process and high cost in existing nano-silver surface-enhanced Raman spectrum substrates; and provides a method for preparing nano-silver surface-enhanced Raman spectrum substrates by gamma radiation

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  • Method using gamma radiation for preparing nano-silver surface-enhanced Raman spectrum substrate
  • Method using gamma radiation for preparing nano-silver surface-enhanced Raman spectrum substrate
  • Method using gamma radiation for preparing nano-silver surface-enhanced Raman spectrum substrate

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specific Embodiment approach 1

[0012] Specific embodiment one: the method for preparing nano-silver surface-enhanced Raman spectrum substrate by gamma radiation in this embodiment is carried out according to the following steps:

[0013] Step 1. Soak the glass substrate in lye solution at 55-65°C for 0.5-1h, then wash it with distilled water, then soak it in nitric acid solution for 0.5h, then wash it with distilled water, and ultrasonically wash it with absolute ethanol for 0.5-1h , placed in absolute ethanol for subsequent use;

[0014] Step 2, adding free radical scavenger in the silver nitrate solution, the volume of free radical scavenger is 10% of the silver nitrate solution volume, feeds nitrogen after 30min (object is to remove the dissolved oxygen in the solution), obtains radiation solution;

[0015] Step 3, put the glass substrate cleaned in step 1 into a radiation solution, seal it, and irradiate gamma rays for 4 to 8 hours under the condition of an irradiation dose of 10 kGy, to obtain a nano-s...

specific Embodiment approach 2

[0017] Embodiment 2: This embodiment differs from Embodiment 1 in that: the lye in Step 1 is an aqueous NaOH solution with a concentration of 0.2-0.5 mol / L. Other steps and parameters are the same as in the first embodiment.

specific Embodiment approach 3

[0018] Embodiment 3: This embodiment differs from Embodiment 1 or Embodiment 2 in that: the concentration of the nitric acid solution in step 1 is 0.05-1 mol / L. Other steps and parameters are the same as those in Embodiment 1 or Embodiment 2.

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Abstract

The invention relates to a method using gamma radiation for preparing a nano-silver surface-enhanced Raman spectrum substrate, belonging to the field of preparation of Raman spectrum substrates. The invention aims at solving the technical problems of poor signal uniformity, low sensitivity, complex preparation technology and high cost existing in the current nano-silver surface-enhanced Raman spectrum substrate. The method comprises the following steps of: 1, cleaning a glass substrate; 2, preparing a radiation solution; and 3, putting the glass substrate into the radiation solution for gammaray radiation, and finally obtaining the nano-silver surface-enhanced Raman spectrum substrate. The nano-silver surface-enhanced Raman spectrum substrate in the invention can be widely applied to detecting ppm level of concentration of organic molecules and biomolecules, and the nano-silver of the surface of the Raman spectrum substrate is uniformly distributed. During detection, signal finding is fast and accurate, Raman signals are strong, the detection sensitivity is high, and signal response is uniform. The method has simple and fast technology and low cost, and the nano-silver surface-enhanced Raman spectrum substrate which has continuous and uniform large-area metal structure and strong Raman signals can be obtained.

Description

technical field [0001] The invention belongs to the field of preparation of Raman spectrum substrates; in particular, it relates to a method for preparing nano-silver surface-enhanced Raman spectrum substrates by gamma radiation. Background technique [0002] The requirements for detection and analysis in the field of contemporary scientific research are getting higher and higher. With the demand for detection sensitivity and accuracy in trace analysis, new problems have been raised for the field of spectral analysis. Surface enhanced Raman spectroscopy (SERS) improves the energy transfer between the substrate and molecules, avoids the interference of fluorescent background, and makes the detection accuracy of Raman scattering spectroscopy leap forward. SERS technology has ultra-high sensitivity and can detect single molecules, and the detection limit can reach 10 -14 mol / L; Probe-based SERS and a suitable light guide system can realize timely and high-sensitivity detection...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/65B81C1/00
Inventor 赵弘韬徐平赵孝文张丽芳韩喜江
Owner TECHN PHYSICS INST HEILONGJIANG ACADOF SCI
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