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A method for preparing gold nanostars with excellent surface-enhanced Raman properties

A surface-enhanced Raman and gold nanotechnology, which is applied in nanotechnology, metal processing equipment, transportation and packaging, etc., can solve the problem that it is difficult to obtain precise control of Raman enhancement effect, SERS surface substrate, etc.

Active Publication Date: 2021-09-10
INST OF MODERN PHYSICS CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to limiting factors such as substrate surface properties, processing difficulty, processing environment conditions, and production costs, it is still difficult to obtain a SERS surface substrate that accurately controls the shape, size, and Raman enhancement effect of nanostructures.

Method used

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  • A method for preparing gold nanostars with excellent surface-enhanced Raman properties
  • A method for preparing gold nanostars with excellent surface-enhanced Raman properties

Examples

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Embodiment 1

[0038] Example 1 A method for preparing gold nanostars with excellent surface-enhanced Raman properties, comprising the following steps:

[0039] (1) Template preparation:

[0040] Using polycarbonate film (PC film) as the master, using the heavy ion accelerator provided by Lanzhou 129 Xe ions were uniformly irradiated in vacuum; after the irradiation, the polycarbonate film (PC film) was sensitized with ultraviolet light for 2 hours on both sides, and then the sensitized polycarbonate film (PC film) was Place it in 5 mol / L NaOH solution for ultrasonic etching, take it out to dry naturally after etching, and obtain a heavy ion track template with a pore size of 60-80 nm.

[0041] Among them: the thickness of the polycarbonate film (PC film) is 20 μm.

[0042] 129 The energy of Xe ion is 19.5MeV·u -1 (u stands for nucleon).

[0043] 129 The irradiation dose of Xe ions is 2×10 9 ions cm -2 .

[0044] The sensitizing power of ultraviolet light is 50mW.

[0045] The pur...

Embodiment 2

[0057] Example 2 A method for preparing gold nanostars with excellent surface-enhanced Raman properties, comprising the following steps:

[0058] (1) The preparation of the template is the same as in Example 1.

[0059] (2) The sodium borohydride solutions of 0.1mol / L and 0.01mol / L were prepared respectively with the same concentration as in Example 1.

[0060] (3) Prepare the sodium gold sulfite solution of 0.1mol / L and 0.01mol / L respectively with the same embodiment 1.

[0061] ⑷Preparation of gold nanostars:

[0062] Fix the heavy ion track template in the middle of the two reaction tanks, first add 0.01mol / L sodium borohydride solution to the reaction tank on the smooth side of the heavy ion track template, and let it stand for 1 minute; Add 0.01mol / L sodium gold sulfite solution to the reaction tank on the rough side of the template, remove the air bubbles on both sides of the template, and let it stand for reaction, then the gold nanostars will grow on the surface of t...

Embodiment 3

[0065] Example 3 A method for preparing gold nanostars with excellent surface-enhanced Raman properties, comprising the following steps:

[0066] (2) The preparation of the template is the same as in Example 1.

[0067] (2) The sodium borohydride solutions of 0.1mol / L and 0.01mol / L were prepared respectively with the same concentration as in Example 1.

[0068] (3) Prepare the sodium gold sulfite solution of 0.1mol / L and 0.01mol / L respectively with the same embodiment 1.

[0069] (3) Preparation of gold nanostars:

[0070] Fix the heavy ion track template in the middle of the two reaction tanks, first add 0.01mol / L sodium borohydride solution to the reaction tank on the smooth side of the heavy ion track template, and let it stand for 2.5 minutes; Add 0.01mol / L sodium gold sulfite solution to the reaction tank on the rough side of the template, remove the air bubbles on both sides of the template, and let it stand for reaction, then the gold nanostars will grow on the surfac...

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Abstract

The present invention relates to a method for preparing gold nanostars with excellent surface-enhanced Raman characteristics. The method comprises the following steps: (1) Template preparation: take polycarbonate film as a master plate, and utilize the 129 Xe ions are uniformly irradiated in vacuum; after the irradiation is completed, the heavy ion track template with an aperture of 60-80nm can be obtained through ultraviolet light sensitization and chemical etching; mol / L sodium borohydride solution; (3) prepare gold sodium sulfite solutions with concentrations of 0.1mol / L and 0.01mol / L respectively; (4) preparation of gold nanostars: fix the heavy ion track template in the middle of two reaction tanks , first add sodium borohydride solution to the reaction tank on the smooth side of the heavy ion track template, then add sodium gold sulfite solution to the reaction tank on the rough side, remove the air bubbles on both sides of the template, and let it stand for reaction After 10 minutes, the heavy ion track template was taken out and rinsed to obtain gold nanostars. The invention is simple, green, efficient and low in cost.

Description

technical field [0001] The invention relates to the field of preparation of novel nano-functional materials, in particular to a method for preparing gold nano-stars with excellent surface-enhanced Raman characteristics. Background technique [0002] Raman scattering refers to the scattering of frequency changes caused by the interaction of incident light and molecular motion when light passes through the medium, also known as the Raman effect. This phenomenon was discovered by the Indian physicist Raman in 1928 And the phenomenon that the frequency of scattered light changes is observed in the liquid. Raman scattering reflects the vibration, rotation or energy change of electronic states of molecules. Therefore, according to the change of photon frequency, the chemical bond or group contained in the molecule can be judged, so as to identify the substance and analyze the properties of the substance. However, Raman scattering has a small scattering area and weak signal, maki...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F9/24B22F1/00B82Y40/00
CPCB82Y40/00B22F9/24B22F1/0553B22F1/054
Inventor 姚会军刘杰孙友梅段敬来陈永辉
Owner INST OF MODERN PHYSICS CHINESE ACADEMY OF SCI