Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method for growing gold nanoflower particles with sharp tips by using metal films

A gold nanoflower and metal film technology, applied in the field of precious metal nanoparticle preparation, can solve the problems affecting the accuracy of measuring optical signals, difficult to remove surfactants, etc., and achieves strong local limitation of light field, short reaction time, good dispersion sexual effect

Pending Publication Date: 2021-11-23
SHAANXI NORMAL UNIV
View PDF8 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these surfactants are difficult to remove and can greatly affect the accuracy of measuring optical signals, especially in the detection of Raman signals

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
  • Method for growing gold nanoflower particles with sharp tips by using metal films
  • Method for growing gold nanoflower particles with sharp tips by using metal films
  • Method for growing gold nanoflower particles with sharp tips by using metal films

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] 1. Add 0.08g CTAB and 0.56g CTAC to 19mL deionized water, then add 1mL 10mmol / L chloroauric acid aqueous solution, 200μL 10mmol / L silver nitrate aqueous solution, 33.5μL 12mol / L HCl aqueous solution and 160μL 100mmol / L ascorbic acid aqueous solution in sequence, and fully stirred to obtain a growth liquid.

[0020] 2. Use a thermal evaporation coating instrument to vapor-deposit a silver film with a thickness of 10nm on a silicon wafer with a size of 5mm*5mm, and anneal at 200°C for 10min, then soak it in 2mL growth solution, and let it stand at room temperature After growing for 3 hours, wash with deionized water and ethanol to obtain gold nanoflower particles with sharp tips. Such as figure 1 As shown, the surface of the gold nanoflower particles is rough, with a sharp tip, and the diameter of the connection between the tip and the particle is small, and the particle size is mostly between 300 and 500 nm.

Embodiment 2

[0022] 1. Add 0.08g CTAB and 0.56g CTAC to 19mL deionized water, then add 1mL 10mmol / L chloroauric acid aqueous solution, 200μL 10mmol / L silver nitrate aqueous solution, 33.5μL 12mol / L HCl aqueous solution and 160μL 100mmol / L ascorbic acid aqueous solution, and Thoroughly stir to obtain growth liquid.

[0023] 2. Use a thermal evaporation coating instrument to vapor-deposit a gold film with a thickness of 10nm on a silicon wafer with a size of 5mm*5mm, and anneal at 200°C for 10min, then soak it in 2mL growth solution, and let it stand at room temperature After growing for 3 hours, wash with deionized water and ethanol to obtain gold nanoflower particles with sharp tips. Such as figure 2 As shown, the surface of the gold nanoflower particles is rough, with a sharp tip, and the diameter of the connection between the tip and the particle is relatively large, and the particle size is mostly between 200 and 500 nm.

Embodiment 3

[0025] 1. Add 0.08g CTAB and 0.56g CTAC to 19mL deionized water, then add 1mL 10mmol / L chloroauric acid aqueous solution, 200μL 10mmol / L silver nitrate aqueous solution, 33.5μL 12mol / L HCl aqueous solution and 160μL 100mmol / L ascorbic acid aqueous solution, and Thoroughly stir to obtain growth liquid.

[0026] 2. Use a thermal evaporation coating instrument to evaporate an aluminum film with a thickness of 10nm on a silicon wafer with a size of 5mm*5mm, and anneal at 200°C for 10min, then soak it in 2mL growth solution, and let it stand at room temperature After growing for 3 hours, wash with deionized water and ethanol to obtain gold nanoflower particles with sharp tips. Such as image 3 As shown, the surface of gold nanoflower particles is rough, with sharp tips, and the particle size is mostly between 200-500nm.

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
thicknessaaaaaaaaaa
sizeaaaaaaaaaa
sizeaaaaaaaaaa
Login to View More

Abstract

The invention discloses a method for growing gold nanoflower particles with sharp tips by using metal films. The method comprises the following steps of soaking the annealed silver film, gold film, aluminum film and the like in a growth solution at normal temperature, standing for growing, and washing to obtain the gold nanoflower particles with the sharp tips. According to the method, the macroscopically visible metal films are directly used for synthesizing the micro-scale nano-particles, the method is easy and rapid to operate, the requirement for synthesis conditions is low, and the method can be implemented at normal temperature. The obtained gold nanoflower particles have the sharp tips on the surfaces, are good in dispersity, and have stable chemical properties, strong absorption and surface plasmon resonance in the range from visible light to near infrared. The method has the advantage of improving the efficiency of surface enhanced Raman scattering, and single particles can be used for detecting a molecular Raman signal.

Description

technical field [0001] The invention belongs to the technical field of preparation of noble metal nanoparticles, and in particular relates to a method for growing gold nanoflower particles with sharp tips by using a metal film. Background technique [0002] Noble metal nanoparticles are promising materials for nanoscale light confinement and manipulation, and have been widely used in recognition, bioimaging, and catalysis. Owing to their stable chemical properties, strong absorption, and wide-range tunable surface plasmon resonance from the visible to the near-infrared range, gold nanoparticles exhibit strong photothermal and electromagnetic field enhancement. These play an important role in optical signal enhancement applications. Noble metal nanoparticles with sharp edges or tips can enhance the electromagnetic field many times near the edge or tip region due to charge aggregation, and they can minimize the field confinement to a few nanometers. This strong field enhance...

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 Applications(China)
IPC IPC(8): B22F1/00B22F9/24B82Y30/00B82Y40/00G01N21/65
CPCB22F9/24B82Y40/00B82Y30/00G01N21/658
Inventor 郑海荣亢超弥小虎赵欣付正坤张正龙
Owner SHAANXI NORMAL UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap 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