Orderly controllable surface-reinforced Raman scattering active substrate and preparation method thereof

A surface-enhanced Raman, active substrate technology, applied in the field of laser Raman spectroscopy detection, can solve the problems of limited application in the field of molecular sensing, difficulty in large-area mass production, cumbersome procedures, etc., and achieve high surface-enhanced Raman scattering effect, The effect of good substrate stability and low technical cost

Inactive Publication Date: 2009-10-28
SOUTHEAST UNIV
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  • Abstract
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  • Application Information

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Problems solved by technology

However, there are many problems in the preparation of this substrate, such as high cost, cumbersome procedures, complic...

Method used

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  • Orderly controllable surface-reinforced Raman scattering active substrate and preparation method thereof
  • Orderly controllable surface-reinforced Raman scattering active substrate and preparation method thereof

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[0018] The preparation method of the structure-ordered and controllable silver nanometer surface-enhanced Raman scattering substrate proposed by the present invention comprises the following steps:

[0019] (1) Put the aluminum sheet into distilled water and acetone successively for super vibration to remove the adsorbed impurities on the surface.

[0020] (2) Put the aluminum sheet as the anode into the polishing solution and carry out electrochemical polishing for 3 minutes under the condition of DC constant voltage 15V, wherein the polishing solution is a mixed solution of perchloric acid and ethanol with a volume ratio of 1:5.

[0021] (3) The pretreated aluminum sheet is corroded by a two-step oxidation method: the aluminum sheet is used as the anode, the molybdenum sheet is used as the cathode, the temperature is maintained at 10°C, and the constant voltage is oxidized in 0.5mol / L oxalic acid solution. The first step is to oxidize for 2 hours, and then put it into a mixe...

Embodiment 1

[0024] (1) Put the aluminum sheet into distilled water and acetone successively for super vibration to remove the adsorbed impurities on the surface.

[0025] (2) Then put the aluminum sheet as the anode into the polishing solution and carry out electrochemical polishing for 3 minutes under the condition of DC constant voltage 15V, in which the polishing solution is a mixed solution of perchloric acid and ethanol with a volume ratio of 1:5.

[0026] (3) The pretreated aluminum sheet is corroded by a two-step oxidation method: the aluminum sheet is used as the anode, the molybdenum sheet is used as the cathode, the constant voltage is set to 40V, the temperature is maintained at 10°C, and the oxalic acid solution is 0.5mol / L. oxidation. The first step is oxidized for 2 hours, then put it into a mixed solution of 1.8wt.% chromic acid and 6wt.% phosphoric acid in an equal volume ratio, react at 75°C for 2 hours, and repeat the first step oxidation process to obtain porous alumina...

Embodiment 2

[0029] (1) Put the aluminum sheet into distilled water and acetone successively for super vibration to remove the adsorbed impurities on the surface.

[0030] (2) Then put the aluminum sheet as the anode into the polishing solution and carry out electrochemical polishing for 3 minutes under the condition of DC constant voltage 15V, in which the polishing solution is a mixed solution of perchloric acid and ethanol with a volume ratio of 1:5.

[0031] (3) The pretreated aluminum sheet is corroded by a two-step oxidation method: the aluminum sheet is used as the anode, the molybdenum sheet is used as the cathode, the constant voltage is set to 50V, the temperature is maintained at 10°C, and the corrosion is carried out in 0.5mol / L oxalic acid solution oxidation. The first step is oxidized for 2 hours, then put it into a mixed solution of 1.8wt.% chromic acid and 6wt.% phosphoric acid in an equal volume ratio, react at 75°C for 2 hours, and repeat the first step oxidation process ...

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Abstract

The invention relates to an orderly controllable surface-reinforced Raman scattering active substrate and a preparation method thereof, and belongs to the technical field of laser-Raman spectrum detection. The substrate has a structure of a periodical hexagonal plum-blossom silver nano island, wherein the silver nano island is semispherical; the diameter of the silver nano island is approximately between 45 and 55 nanometers; and the central aperture of each hexagonal plum-blossom structure is adjustable within the spacing approximately between 10 and 90 nanometers. The method for preparing the surface-reinforced Raman scattering substrate with the orderly and controllable silver nano island structure comprises: preparing a porous alumina template; and utilizing magnetron sputtering to spray silver on the surface of the template to obtain the reinforced substrate. The substrate has the advantages of high surface-reinforced Raman scattering effect, orderly and controllable structure, good repeatability, high stability, low technical cost, simple operation and the like.

Description

technical field [0001] The invention belongs to the technical field of laser Raman spectrum detection, and relates to a silver nano-hexagonal quincunx structure substrate with high surface-enhanced Raman scattering activity and orderly and controllable period and a preparation method thereof. Background technique [0002] Laser Raman technology is a very effective tool for probing interface properties and intermolecular interactions, characterizing surface molecular adsorption behavior and molecular structure. With its unique detection advantages, it has been widely used in food and drug safety, biomolecular and environmental detection, archaeology and mineral identification and other fields, and is extending to other fields at a rapid speed. However, due to the low efficiency of ordinary Raman scattering, the signal is very weak, and if the laser intensity is increased, it may cause side effects such as photodamage or photobleaching of the sample. Conventional Raman detect...

Claims

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Application Information

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IPC IPC(8): G01N21/65B82B3/00
Inventor 邱腾郎咸忠
Owner SOUTHEAST UNIV
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