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Method for preparing jellyfish-shaped gold-copper heterostructure material based on seed growth method

A technology of heterostructure, jellyfish, applied in the fields of nanotechnology, nanotechnology, nanotechnology for materials and surface science, can solve problems such as high asymmetry, achieve enhanced local electromagnetic field, easy to generalize, and simple and easy method row effect

Active Publication Date: 2021-11-26
SHAANXI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There have been related reports on the preparation of gold-copper heterostructures, but the nanostructures obtained so far have certain symmetry, and even most of them have high symmetry. defects, so obtaining highly asymmetric gold-copper nanostructures is a problem to be solved

Method used

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  • Method for preparing jellyfish-shaped gold-copper heterostructure material based on seed growth method
  • Method for preparing jellyfish-shaped gold-copper heterostructure material based on seed growth method
  • Method for preparing jellyfish-shaped gold-copper heterostructure material based on seed growth method

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Experimental program
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Effect test

Embodiment 1

[0038] 1. Preparation of gold nanoflowers with sharp tips

[0039] Add 0.08g CTAB and 0.56g CTAC to 19mL deionized water, put it in a water bath at 30°C and stir evenly, then add 1mL 10mmol / L chloroauric acid aqueous solution, 200μL 10mmol / L silver nitrate aqueous solution, 33.5μL 12mol / L HCl aqueous solution and 160 μL of 100 mmol / L ascorbic acid aqueous solution, and fully stirred to obtain a growth solution. Then add 60 μL of gold-silver alloy nanoparticle solution to the growth solution as a seed, and after standing at room temperature for 3 hours, centrifuge and wash twice with 0.1 mmol / LCTAB aqueous solution at a speed of 3000 rpm, each time for 5 minutes, to obtain a seed with an infrared absorption wavelength of about 1000 nm. Gold nanoflower solution with sharp tip. Depend on figure 1 It can be seen that the obtained gold nanoflowers have obvious relatively sharp tips, and the particle diameter is 70-180 nm.

[0040] 2. Preparation of jellyfish-shaped gold-copper h...

Embodiment 2

[0043] In step 2 of this embodiment, 100 μL of 100 mmol / L copper chloride aqueous solution was added, and other steps were the same as in embodiment 1 to obtain a jellyfish-shaped gold-copper heterostructure material.

Embodiment 3

[0045] In step 2 of this embodiment, 150 μL of 100 mmol / L copper chloride aqueous solution was added, and other steps were the same as in embodiment 1 to obtain a jellyfish-shaped gold-copper heterostructure material.

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Abstract

The invention discloses a method for preparing a jellyfish-shaped gold-copper heterostructure material based on a seed growth method, which comprises the following steps: in the presence of hexadecylamine, taking a gold nanoflower with a sharp tip as a seed and a copper salt as a copper source, because huge lattice mismatch exists between gold and copper, the gold nanoflower is not in the center, and copper selectively grows along a certain side surface, so that the preparation of the jellyfish-shaped gold-copper heterostructure material is realized. The gold nanoflower adopted by the method has tips and is beneficial to enhancing a local electromagnetic field, the optical property of copper is within the visible light range, when copper grows at one end of the gold nanoflower, the concentration of CTAB and the concentration of copper salt used during centrifugal washing play a crucial role in overgrowth of copper on the gold nanoflower, and the morphology of an Au-Cu nanostructure is determined. The method disclosed by the invention is simple and easy to implement, is easy to popularize, has a good application prospect in surface enhanced Raman scattering, and provides a new idea for the design of a plasmon photo-thermal nano structure.

Description

technical field [0001] The invention belongs to the technical field of nano synthesis, and in particular relates to a method for preparing a jellyfish-shaped gold-copper heterostructure material based on a seed growth method. Background technique [0002] Metallic nanostructures technically exhibit many useful properties, and their size, shape, and composition can be tuned by fine-tuning certain parameters. In many cases, the shape or morphology of metallic nanostructures plays the most critical role in terms of their properties and suitability for specific applications. Changing the geometry of nanostructured metals can significantly alter their surface plasmon resonance properties. For nanostructures with anisotropic shapes, especially the gold nanoflowers used in the present invention, plasmonic field enhancement can be achieved, which makes them useful for surface-enhanced Raman scattering (SERS), sensing, imaging and photothermal therapy. Copper is an inexpensive and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/24B22F1/00B82Y30/00B82Y40/00
CPCB22F9/24B82Y30/00B82Y40/00
Inventor 张正龙赵欣弥小虎亢超付正坤郑海荣
Owner SHAANXI NORMAL UNIV
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