Eureka AIR delivers breakthrough ideas for toughest innovation challenges, trusted by R&D personnel around the world.

Hemispherical shell-like porous gold micro-nano structure and its preparation method and application

A technology of micro-nano structure and hemispherical shell, which is applied in the direction of nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problems of complexity, reduction of SERS activity, difficulty in obtaining SERS, etc., to reduce damage, SERS The effect of high activity and high SERS activity

Inactive Publication Date: 2018-12-21
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this product has strong light absorption at 785nm, it is suitable for the detection of pesticide molecules, but it has shortcomings with its preparation method. At first, the shell and ring body in the product are dense, greatly reduce its SERS activity; secondly, the preparation method is not only difficult to obtain products with higher SERS activity, but also complicated

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Hemispherical shell-like porous gold micro-nano structure and its preparation method and application
  • Hemispherical shell-like porous gold micro-nano structure and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] The concrete steps of preparation are:

[0036] First, put the graphite sheet as the anode and the conductive substrate as the cathode in the silver electrolyte, at 100μA / cm 2 Electrodeposition at a constant current for 200min; wherein, the conductive substrate is an indium tin oxide glass substrate, and the silver electrolyte is a mixed solution of 0.2g / L silver nitrate aqueous solution and 50g / L citric acid aqueous solution, and the Silver Nanoparticles Assembled Micro-Hemispheres on Conductive Substrates. After cleaning the conductive substrate with micron hemispheres assembled by silver nanoparticles on it with deionized water once, place it in the gold electrolyte and let it stand for 60 minutes, take it out and wash it once with deionized water , dried at 40°C; wherein, the gold electrolyte is a mixture of 0.3g / L chloroauric acid aqueous solution and 50g / L sodium chloride aqueous solution, which is similar to figure 1 The shown hemispherical shell-like porous go...

Embodiment 2

[0038] The concrete steps of preparation are:

[0039] First place graphite sheet as anode and conductive substrate as cathode in silver electrolyte, at 325μA / cm 2 Electrodepositing at a constant current for 158min; wherein, the conductive substrate is an indium tin oxide glass substrate, and the silver electrolyte is a mixed solution of 1g / L silver nitrate aqueous solution and 40g / L citric acid aqueous solution, and the silver electrolyte attached on it is obtained. Nanoparticle-Assembled Microhemispheres on Conductive Substrates. After cleaning the conductive substrate with micron hemispheres assembled by silver nanoparticles with deionized water for 2 times, place it in the gold electrolyte and let it stand for 95 minutes, take it out and clean it with deionized water for 2 times , dried at 45°C; wherein, the gold electrolyte is a mixture of 1g / L chloroauric acid aqueous solution and 40g / L sodium chloride aqueous solution, which is similar to figure 1 The shown hemispheri...

Embodiment 3

[0041] The concrete steps of preparation are:

[0042] First, put the graphite sheet as the anode and the conductive substrate as the cathode in the silver electrolyte, at 550μA / cm 2Electrodepositing at a constant current for 115min; wherein, the conductive substrate is an indium tin oxide glass substrate, and the silver electrolyte is a mixed solution of 5g / L silver nitrate aqueous solution and 25g / L citric acid aqueous solution, and the silver electrolyte attached on it is obtained. Conductive substrates for nanoparticle-assembled microhemispheres. After cleaning the conductive substrate with micron hemispheres assembled by silver nanoparticles with deionized water for 2 times, place it in the gold electrolyte and let it stand for 130 minutes, take it out and clean it with deionized water for 2 times , dried at 50°C; wherein, the gold electrolyte is a mixed solution of 3g / L chloroauric acid aqueous solution and 25g / L sodium chloride aqueous solution, prepared as figure 1 T...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
diameteraaaaaaaaaa
wavelengthaaaaaaaaaa
thicknessaaaaaaaaaa
Login to View More

Abstract

The invention discloses a hemispherical-shell-shaped porous gold micro-nano structure and a preparation method and functions thereof. According to the gold micro-nano structure, a conducting substrate is provided with a gold micron hemisphere with the hemisphere diameter being 4-10 microns and the spherical shell thickness being 200-1000 nm, and a gold micron hemisphere shell is composed of a plurality of holes with the diameter being 50-200 nm. The method comprises the steps that firstly, a graphite flake is served as the anode, the conducting substrate is served as the cathode, the graphite flake and the conducting substrate are placed in a silver electrolyte and are subjected to electro-deposition under a constant electric current, and the conducting substrate to which the micron hemisphere assembled by silver nano particles is attached is obtained; then, the conducting substrate to which the micron hemisphere assembled by the silver nano particles is attached is placed into a gold electrolyte and stands still, and a target product is prepared. The hemispherical-shell-shaped porous gold micro-nano structure has high SERS activity and is extremely easily applied to rapid trace detection of farm chemical thiram widely and commercially.

Description

technical field [0001] The invention relates to a gold micro-nano structure and its preparation method and application, in particular to a hemispherical shell-shaped porous gold micro-nano structure and its preparation method and application. Background technique [0002] Due to the resonance properties of surface plasmons, noble metal nanostructures or micro-nanostructures have a wide range of applications in surface-enhanced spectroscopy, especially SERS spectroscopy. Recently, in order to obtain noble metal micro-nanostructures with surface plasmon resonance properties, some beneficial attempts and efforts have been made, such as "Gold Binary-Structured Arrays Based on Monolayer Colloidal Crystals and Their Optical Properties", Small, 2014, 10, 2374-2381 ("Single-layer colloidal crystal-based gold dual structure array and its optical properties", "Small" 2014, No. 10, pp. 2374-2381). The gold double structure array mentioned in this article is a gold ring erected between...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C25D5/54C25D3/46C25D3/48G01N21/65B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00C25D3/46C25D3/48C25D5/54G01N21/658
Inventor 朱储红孟国文
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com