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Porous gold-silver alloy nanomaterial as well as preparation method and application thereof

A technology of nanomaterials and silver alloys, applied in metal material coating technology, nanotechnology, nanotechnology, etc., can solve the problems of high preparation cost, complicated preparation method, hindering the adsorption of target molecules, etc., and achieve low preparation cost and high preparation method Effect of Simple, Excellent Surface Enhanced Raman Scattering Properties

Active Publication Date: 2017-11-03
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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Problems solved by technology

[0004] In order to solve the technical problems such as the complex preparation method of the existing porous gold-silver alloy nanomaterials, the high preparation cost and the need to use end-capping agents or stabilizers in the preparation process, which hinder the adsorption of target molecules, the present invention provides a porous Gold-silver alloy nanomaterial and its preparation method and application

Method used

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  • Porous gold-silver alloy nanomaterial as well as preparation method and application thereof
  • Porous gold-silver alloy nanomaterial as well as preparation method and application thereof
  • Porous gold-silver alloy nanomaterial as well as preparation method and application thereof

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preparation example Construction

[0033] Specifically, the preparation method of the porous gold-silver alloy nanomaterial may include the following steps:

[0034]Step A, using a single-layer colloidal microsphere array with a colloidal microsphere diameter of 350-750 nm as a template, and depositing a layer of gold film on the surface of the template by a physical deposition method, and then removing the single-layer colloidal microsphere array by heat treatment, An ordered array of gold nanospheres was thus prepared.

[0035] Further: the specific implementation process of step A may include the following steps:

[0036] (1) Step A1, put the substrate into ethanol and deionized water in turn for ultrasonic cleaning, each liquid is ultrasonically cleaned for 20-60 minutes, and then the cleaned substrate is dried (for example, it can be placed in an oven to drying at 60°C for 20 minutes), and then placed in an ultraviolet ozone cleaning machine for 20-60 minutes of irradiation to obtain a substrate with a hy...

Embodiment 1

[0054] Such as Figure 10 Shown, a kind of porous gold-silver alloy nano material, its preparation method comprises the following steps:

[0055] Step a. Place the two substrates of glass slide and silicon wafer into acetone, ethanol, and deionized water in turn for ultrasonic cleaning. Ultrasonic cleaning is performed in each liquid for 20-60 minutes, and then the cleaned glass slide and silicon wafer Dry in an oven at 60°C for 20 minutes, and then place the dried glass slides and silicon wafers in an ultraviolet ozone cleaner for 20-60 minutes of irradiation to obtain glass slide substrates and silicon wafer substrates with hydrophilic surfaces.

[0056] Step b. Take 40mL of polystyrene colloidal microsphere suspension (2.5wt.%) with a colloidal microsphere diameter of 350-750nm, and mix it with an equal volume of ethanol, and then perform ultrasonic dispersion for 10-30min to obtain a dispersed Uniform colloidal microsphere diameter of 350 ~ 750nm polystyrene colloidal mic...

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Abstract

The invention discloses a porous gold-silver alloy nanomaterial as well as a preparation method and an application thereof. The material is a hexagonal porous gold-silver alloy nano-sphere ordered array which is not arranged closely, and the period of the material ranges from 350 nm to 750 nm. The preparation method of the material comprises the steps as follows: a single-layer colloidal microsphere array is used as a formwork, a layer of gold film is deposited on the surface of the formwork with a physical deposition method, then heat treatment is performed, and a gold nano-sphere ordered array is prepared; a layer of silver film is deposited on the surface of the gold nano-sphere ordered array with a physical deposition method, then heating and annealing treatment is performed, and a gold-silver alloy nano-sphere ordered array is prepared; chemical corrosion treatment is performed on the gold-silver alloy nano-sphere ordered array, and thus the porous gold-silver alloy nanomaterial is prepared. With the method, the large-area hexagonal porous gold-silver alloy nano-sphere ordered array which is not arranged closely and is controllable in period and size can be prepared, capping agents and stabilizing agents are not required, and the array can be adsorbed by target molecules easily and is convenient to reuse.

Description

technical field [0001] The invention relates to the field of gold-silver alloy nanomaterials, in particular to a porous gold-silver alloy nanomaterial and its preparation method and application. Background technique [0002] Gold-silver alloy nanomaterials have localized surface plasmon resonance characteristics, which can produce a strong electromagnetic field enhancement effect, and can be widely used in analysis and detection based on surface-enhanced Raman scattering. Since the sensitivity of surface-enhanced Raman scattering mainly depends on the "hot spots" where the electromagnetic field is greatly enhanced in nanomaterials, people have prepared gold-silver alloy nanomaterials with structures such as rough surfaces, tips, and corners, but these have The sensitivity of surface-enhanced Raman scattering of high-density "hot spot" gold-silver alloy nanomaterials is not ideal in practical applications. Compared with gold-silver alloy nanomaterials with other structures, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F1/00B22F9/12C23C14/22G01N21/65B82Y30/00B82Y40/00
CPCG01N21/65C23C14/223B82Y30/00B82Y40/00B22F9/12B22F1/07B22F1/145B22F1/054
Inventor 李越张涛孙一强杭立峰门丹丹
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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