SERS substrate and preparation method based on metal chloride nano film

A nano-film and chloride technology, which is applied in Raman scattering, material excitation analysis, etc., can solve the problems of high detection limit concentration and low SERS detection sensitivity, and achieve orderly and controllable morphology, excellent sensitivity, and high repeatability sexual effect

Inactive Publication Date: 2018-07-10
NORTHWEST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Based on the problems existing in the prior art, the present invention provides a SERS substrate and a preparation method based on a metal chloride nano-film, which solves the technical problems of low SERS detection sensitivity and high detection limit concentration in the prior art

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  • SERS substrate and preparation method based on metal chloride nano film
  • SERS substrate and preparation method based on metal chloride nano film
  • SERS substrate and preparation method based on metal chloride nano film

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Experimental program
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Effect test

Embodiment 1

[0040] This embodiment provides a method for preparing a metal chloride nano-film-based SERS substrate, which includes the following steps:

[0041] Step 1: Using the secondary anodic oxidation method, for the high purity (99.99%) metal aluminum film, use the oxalic acid solution with a concentration of 0.3mol / L, temperature 5℃, voltage 40V, oxidation for 3h to prepare an orderly regular structure oxidation Aluminum template, ordered and regular structure of nanopores distributed in array;

[0042] Step 2: Take the ordered and regular structure of alumina template with arrayed nanopore structure as the substrate, and deposit CuCl with a concentration of 47mg / L on its upper surface 2 Solution.

[0043] Step 3: Seal the sample, store it in a closed environment at 15°C for 240h, and obtain CuCl based on alumina substrate through self-organization 2 Nano film materials. The CuCl based on alumina substrate 2 The area of ​​the nano film material is arbitrary and the shape is controllable....

Embodiment 2

[0052] This embodiment provides a method for preparing a metal chloride nano-film-based SERS substrate, which includes the following steps:

[0053] Step 1: Using the secondary anodic oxidation method, for the high purity (99.99%) metal aluminum film, use the oxalic acid solution with a concentration of 0.3mol / L, temperature 5℃, voltage 40V, oxidation for 3h to prepare an orderly regular structure oxidation Aluminum template, ordered and regular structure of nanopores distributed in array;

[0054] Step 2: Take the ordered and regular structure of the alumina template with an array of nanopore structure as the substrate, and deposit CuCl with a concentration of 20mg / L on its upper surface 2 Solution.

[0055] Step 3: Seal the sample, store it in a closed environment at 10°C for 280h, and obtain CuCl based on alumina substrate through self-organization 2 Nano film materials. The CuCl based on alumina substrate 2 The area of ​​the nano film material is arbitrary and the shape is contr...

Embodiment 3

[0058] This embodiment provides a method for preparing a metal chloride nano-film-based SERS substrate, which includes the following steps:

[0059] Step 1: Using the secondary anodic oxidation method, for the high purity (99.99%) metal aluminum film, use the oxalic acid solution with a concentration of 0.3mol / L, temperature 5℃, voltage 40V, oxidation for 3h to prepare an orderly regular structure oxidation Aluminum template, ordered and regular structure of nanopores distributed in array;

[0060] Step 2: Take the ordered and regular structure of the alumina template with an array of nanopore structure as the substrate, and deposit CuCl with a concentration of 100mg / L on its upper surface 2 Solution.

[0061] Step 3: Seal the sample, store it in a closed environment at 35°C for 150h, and obtain CuCl based on alumina substrate through self-organization 2 Nano film materials. The CuCl based on alumina substrate 2 The area of ​​the nano film material is arbitrary and the shape is cont...

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Abstract

The invention provides a SERS substrate based on metal chloride nanofilm and a preparation method. The method uses porous anodic aluminum oxide as a substrate, drops a metal chloride aqueous solution on the substrate, and obtains it under sealed or semi-sealed storage conditions at normal temperature. The metal chloride nanofilm is coated with a metal film on the metal chloride nanofilm. By applying a simple improvement method to the AAO template, the present invention achieves orderly and controllable morphology, high repeatability, uniform hot spots, stable properties, and can be grown in a large area. The sensitivity is better than that of the Au-AAO substrate and the detection limit concentration is low. Flower-shaped multilayer composite SERS active substrate based on Au-AAO. Its preparation process is simple, high-efficiency, low-cost, and suitable for large batches. It provides an effective new batch preparation method for scientific research on the preparation and application of SERS substrates.

Description

Technical field [0001] The invention belongs to the technical field of surface nanomaterials, and relates to a SERS substrate, in particular to a SERS substrate based on a metal chloride nano film and a preparation method thereof. Background technique [0002] Surface-enhanced Raman scattering (SERS) was first discovered in 1974 by Fleishmann’s research group in the United Kingdom. Its huge Raman signal enhancement combined with spectral fingerprint recognition features attracted the attention of researchers in various fields. After decades, it has developed into an ultra-sensitive spectroscopy technology that can reach the level of single-molecule detection and is suitable for low-concentration detection. It has huge applications in biology, diagnostics, medicine, materials science, environmental science and analytical science. potential. [0003] Since the advent of SERS technology, research in related fields has mainly focused on the preparation of substrates. Its practical app...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): G01N21/65
Inventor王凯歌隋超璠任军营武建国王爽张琛白晋涛
OwnerNORTHWEST UNIV