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A method for preparing self-assembled bayberry-like gold SERS substrate assisted by iron nano-lattice

A nano-iron, bayberry-like technology, applied in nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problems that limit the development of SERS micro-detection tools, unstable test results, and high preparation costs. The synthesis process is efficient and concise, the preparation process is simple and feasible, and the sensitivity is high.

Inactive Publication Date: 2020-06-26
NINGBO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The substrate produced by the traditional production method is not easy to form uniformly distributed nano-lattice arrays, and the test results are unstable; and the traditional preparation method has problems such as cumbersome process and high preparation cost, which greatly limit the use of SERS as a trace Development of detection tools

Method used

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  • A method for preparing self-assembled bayberry-like gold SERS substrate assisted by iron nano-lattice
  • A method for preparing self-assembled bayberry-like gold SERS substrate assisted by iron nano-lattice
  • A method for preparing self-assembled bayberry-like gold SERS substrate assisted by iron nano-lattice

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] A method for preparing a self-assembled bayberry-shaped gold SERS substrate assisted by iron nano-lattice, the specific steps are as follows:

[0037] 1) Preparation of AAO template with a pore size of 60-80nm:

[0038] a. 99.99% high-purity aluminum sheet is placed in a tube furnace, annealed at 500°C for 4 hours under nitrogen protection, to remove surface stress;

[0039] b. Ultrasonic cleaning with acetone and alcohol for 5 minutes to remove surface oil;

[0040] c. Using HClO 4 and ethanol (volume ratio: 1:9) polishing solution, polish the aluminum sheet under the condition of current 0.6A for 2min;

[0041] d. Use 0.4mol / L oxalic acid solution to oxidize the aluminum sheet for 4 hours at a voltage of 40V and a temperature of 10°C;

[0042] e. Put the aluminum sheet oxidized in step d in chromic phosphoric acid solution, and bake it for 6 hours at 60°C to remove the oxide film; use 0.4mol / L oxalic acid solution, put the aluminum sheet at a voltage of 40V , oxid...

Embodiment 2

[0053] A method for preparing a self-assembled bayberry-shaped gold SERS substrate assisted by iron nano-lattice, the specific steps are as follows:

[0054] 1) Preparation of AAO template with a pore size of 60-80nm:

[0055] a. 99.99% high-purity aluminum sheet is placed in a tube furnace, annealed at 450°C for 4 hours under nitrogen protection, to remove surface stress;

[0056] b. Ultrasonic cleaning with acetone and alcohol for 6 minutes to remove surface oil;

[0057] c. Using HClO 4 and ethanol (volume ratio 1:8) polishing solution, polish the aluminum sheet for 2.5min under the condition of current 0.5A;

[0058] d. Use 0.5mol / L oxalic acid solution to oxidize the aluminum sheet for 3.5h at a voltage of 45V and a temperature of 11°C;

[0059] e. Place the aluminum sheet oxidized in step d in chromic phosphoric acid solution, and bake at 65°C for 5 hours to remove the oxide film;

[0060] f. Use 0.5mol / L oxalic acid solution to oxidize the aluminum sheet at a voltag...

Embodiment 3

[0071] A method for preparing a self-assembled bayberry-shaped gold SERS substrate assisted by iron nano-lattice, the specific steps are as follows:

[0072] 1) Preparation of AAO template with a pore size of 60-80nm:

[0073] a. 99.99% high-purity aluminum sheet is placed in a tube furnace, annealed at 550°C for 3 hours under nitrogen protection, to remove surface stress;

[0074] b. Ultrasonic cleaning with acetone and alcohol for 4 minutes to remove surface oil;

[0075] c. Using HClO 4 and ethanol (volume ratio: 1:10) polishing solution, polish the aluminum sheet for 1.5min at a current of 0.7A;

[0076] d. Use 0.3mol / L oxalic acid solution to oxidize the aluminum sheet for 4.5h at a voltage of 50V and a temperature of 9°C;

[0077] e. Place the aluminum sheet oxidized in step d in chromic phosphoric acid solution, and bake for 7 hours at 55°C to remove the oxide film;

[0078] f. Use 0.3mol / L oxalic acid solution to oxidize the aluminum sheet for 9 hours at a voltage ...

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Abstract

The invention relates to a method for preparing a self-assembled waxberry-shaped gold SRES substrate with the assistance of an iron nanometer dot matrix. The method comprises the following steps: preparing an AAO template with uniform aperture, then growing an iron nanowire on the AAO template, performing the gold plating, and forming the waxberry-shaped gold nanometer dot matrix. Compared with the prior art, the method has the characteristics of simple and easy preparation process, efficient and concise synthetic process, no pollution and low cost; a large-area regular orderly waxberry-shapedself-assembled Au nano spherical array structure with the controllable structure and high sensitivity is formed on the iron nano wire in the evaporation process, the self-assembled SERS substrate canform a rough surface and orderly nanometer array, has high Raman reinforcing activity, can be reused, can improve the stability of SERS, and can be widely applied to the trace detection.

Description

technical field [0001] The invention relates to a method for preparing a metal nano-array substrate, in particular to a method for preparing a self-assembled bayberry-shaped gold SERS substrate assisted by an iron nano-array. Background technique [0002] With the advancement of science and technology, ordered noble metal nanoarrays have attracted more and more attention due to their unique properties, and related research results have been obtained in the fields of surface Raman enhanced (SERS) substrates, solar cells, micro-nano optoelectronic devices, etc. a wide range of applications. Among many noble metal materials, gold (Au) is widely used in the preparation and research of metal nanostructure arrays because of its excellent properties. The properties of metal nanostructures mainly depend on the localized surface plasmon resonance (LSPR), and are also closely related to the size, shape and other related parameters of the nanostructures. Therefore, how to achieve eff...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25D11/04C23C18/08C23C14/24C23C14/18B82Y30/00B82Y40/00G01N21/65
CPCB82Y30/00B82Y40/00C23C14/18C23C14/24C23C18/08C25D11/045G01N21/658
Inventor 王军钟承权单雅倩宁爱凤
Owner NINGBO UNIV
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