Ordered polystyrene@gold composite microsphere array with dynamically adjustable and controllable gaps as well as preparation method and application thereof

A technology of polystyrene spheres and composite microspheres, which is applied in the direction of measuring devices, instruments, and material analysis through optical means, and can solve the problem of silver nanoparticle morphology, size, gap, and uneven distribution, gap, and arrangement period. Accurate regulation, difficulty in obtaining repeatable SERS signals, etc., to achieve the effect of low production cost, strong repeatability and high reliability

Pending Publication Date: 2020-12-22
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this SERS substrate can be used for the detection of trace pollutants, there are deficiencies in both the preparation method and the SERS substrate. First, the shape of the silver nanoparticles on the heat-shrinkable polyvinyl chloride substrate as the SERS substrate The shape, size, gap and distribution are not uniform, so that the gap between the nanoparticles and the arra

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
  • Ordered polystyrene@gold composite microsphere array with dynamically adjustable and controllable gaps as well as preparation method and application thereof
  • Ordered polystyrene@gold composite microsphere array with dynamically adjustable and controllable gaps as well as preparation method and application thereof
  • Ordered polystyrene@gold composite microsphere array with dynamically adjustable and controllable gaps as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] The concrete steps of preparation are:

[0045] Step 1, first place the heat-shrinkable polyvinyl chloride substrate in a plasma cleaning machine for cleaning for 2 minutes. A single-layer colloidal crystal template composed of polystyrene colloidal spheres with a diameter of 200 nm is placed on the heat-shrinkable polyvinyl chloride substrate to obtain a heat-shrinkable polyvinyl chloride substrate with a single-layer colloidal crystal template.

[0046] Step 2, performing plasma etching on the single-layer colloidal crystal template on the heat-shrinkable polyvinyl chloride substrate; wherein, the gas atmosphere during etching is argon, the power is 58W, and the time is 4min. The heat-shrinkable polyvinyl chloride substrate of the single-layer non-close-packed polystyrene sphere template with the distance between two adjacent colloid spheres being 100nm.

[0047] Step 3, use the sputter coating method on the single-layer non-close-packed polystyrene spherical templat...

Embodiment 2

[0049] The concrete steps of preparation are:

[0050] Step 1, first place the heat-shrinkable polyvinyl chloride substrate in a plasma cleaning machine for cleaning for 2 minutes. A single-layer colloidal crystal template composed of polystyrene colloidal spheres with a diameter of 400 nm is placed on the heat-shrinkable polyvinyl chloride substrate to obtain a heat-shrinkable polyvinyl chloride substrate with a single-layer colloidal crystal template.

[0051] Step 2, performing plasma etching on the single-layer colloidal crystal template on the heat-shrinkable polyvinyl chloride substrate; wherein, the gas atmosphere during etching is argon, the power is 58W, and the time is 6.7min. A heat-shrinkable polyvinyl chloride substrate with a single-layer non-close-packed polystyrene sphere template with a distance between two adjacent colloid spheres of 106 nm.

[0052] Step 3, using the sputter coating method on the single-layer non-close-packed polystyrene spherical template ...

Embodiment 3

[0054] The concrete steps of preparation are:

[0055] Step 1, first place the heat-shrinkable polyvinyl chloride substrate in a plasma cleaning machine for cleaning for 2 minutes. A single-layer colloidal crystal template composed of polystyrene colloidal spheres with a diameter of 600 nm is placed on the heat-shrinkable polyvinyl chloride substrate to obtain a heat-shrinkable polyvinyl chloride substrate with a single-layer colloidal crystal template.

[0056] Step 2, performing plasma etching on the single-layer colloidal crystal template on the heat-shrinkable polyvinyl chloride substrate; wherein, the gas atmosphere during etching is argon, the power is 58W, and the time is 9.5min, to obtain A heat-shrinkable polyvinyl chloride substrate with a single-layer non-close-packed polystyrene sphere template with a distance between two adjacent colloid spheres of 113 nm.

[0057] Step 3, using the sputter coating method on the single-layer non-close-packed polystyrene spherical...

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
Diameteraaaaaaaaaa
Particle sizeaaaaaaaaaa
Login to view more

Abstract

The invention discloses an ordered polystyrene@gold composite microsphere array with dynamically controllable gaps as well as a preparation method and application thereof. The array is a thermotropicshrinkage polyvinyl chloride substrate and an ordered gold composite microsphere array arranged on the thermotropic shrinkage polyvinyl chloride substrate, wherein distance between gold composite microspheres forming the microsphere array is 50-65 nm, the sphere diameters of the microspheres are in a range of 150-935 nm, and the gold composite microspheres are formed by coating the surfaces of polystyrene spheres with gold films. The method comprises the following steps: firstly, placing a single-layer colloidal crystal template formed by polystyrene colloidal spheres on the thermotropic shrinkage polyvinyl chloride substrate; then carrying out plasma etching on the obtained single-layer colloidal crystal template on the thermotropic shrinkage polyvinyl chloride substrate; and depositing the gold films on the obtained single-layer non-close-packed polystyrene sphere template on the thermotropic shrinkage polyvinyl chloride substrate by using a sputter coating method to obtain a targetproduct. The array can be easily and widely commercialized for accurate and repeated detection of a trace amount of a to-be-detected object attached to a surface-enhanced Raman scattering active substrate.

Description

technical field [0001] The invention relates to a microsphere array and its preparation method and use, in particular to an ordered polystyrene@gold composite microsphere array whose gap can be dynamically adjusted and its preparation method and use. Background technique [0002] Surface-enhanced Raman scattering (SERS) spectroscopy, as an ultra-sensitive detection technology, has the advantages of simple operation, rapidity, and fingerprint identification of chemical structures. Has been widely used. For noble metal substrates, the enhancement of Raman signal is mainly attributed to the electromagnetic field enhancement induced by localized surface plasmon resonance on the noble metal surface. When the gap between two noble metal nanostructures is less than 10nm, a very strong coupling electric field will be generated at the gap, which is usually called SERS "hot spot". When the target molecule is in these "hot spots", its Raman signal is significantly amplified, and the ...

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
IPC IPC(8): G01N21/65
CPCG01N21/658
Inventor 孟国文闫思思陈斌黄竹林潘其军
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
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap