Unlock instant, AI-driven research and patent intelligence for your innovation.

A kind of lateral nanocavity array structure SERS substrate and preparation method thereof

An array structure and lateral technology, which is applied in the field of lateral nanocavity array structure SERS substrate and its preparation, can solve the problems of different electrical environments with the same current density and the inability to effectively build electric field strength, etc.

Active Publication Date: 2021-10-22
合肥九州龙腾科技成果转化有限公司
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to overcome the defect that the SERS substrate in the prior art cannot effectively construct an electrical environment with the same electric field intensity but different current densities, the present invention provides a SERS substrate with a lateral nanocavity array structure and a preparation method thereof, through which the SERS substrate can effectively Construct the electrical environment with different electric field strength and current density, which can be used to study the plasma-induced charge transfer mechanism and the intermediate state theory of SERS physical enhancement and chemical enhancement

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
  • A kind of lateral nanocavity array structure SERS substrate and preparation method thereof
  • A kind of lateral nanocavity array structure SERS substrate and preparation method thereof
  • A kind of lateral nanocavity array structure SERS substrate and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] A SERS substrate with a lateral nanocavity array structure. The lateral nanocavity array is composed of semi-open hollow microspheres with hollow cavities inside. The inner diameter is 450nm, and a horizontal opening with a diameter of 300nm Pores, the inner layer of the semi-open hollow microspheres is TiO with a surface modification of 4-MBA probe molecule thickness of 6nm 2 thin film, on TiO 2 The outside of the film is also plated with a layer of Au film with a thickness of 50nm.

[0041] Its preparation method comprises the following steps:

[0042] 1) The two-dimensional hexagonal close-packed polystyrene sphere array template was prepared by self-assembly method. The specific preparation method is as follows:

[0043] (1.1) Cleaning of silicon wafers. Put the silicon wafer into a beaker filled with ammonia water, hydrogen peroxide, and deionized water (volume ratio 1:2:6), heat to 100°C and boil for 5 minutes in a fume hood. After standing it at room temperatur...

Embodiment 2

[0051] A SERS substrate with a lateral nanocavity array structure, the lateral nanocavity array is composed of semi-open hollow microspheres with hollow cavities inside, the inner diameter is 400nm, and a horizontal opening with a diameter of 250nm Pores, the inner layer of the semi-open hollow microspheres is TiO with a surface modification of 4-MBA probe molecule thickness of 5nm 2 thin film, on TiO 2 The outside of the film is also coated with a layer of Ag film with a thickness of 40nm.

[0052] Its preparation method comprises the following steps:

[0053] 1) The two-dimensional hexagonal close-packed polystyrene sphere array template was prepared by self-assembly method. The specific preparation method is as follows:

[0054] (1.1) Cleaning of silicon wafers: Put the silicon wafers into a beaker filled with ammonia water, hydrogen peroxide, and deionized water (volume ratio 1:1.5:5), heat to 100°C in a fume hood and boil for 3 minutes. After standing it at room temper...

Embodiment 3

[0062] A SERS substrate with a lateral nanocavity array structure, the lateral nanocavity array is composed of semi-open hollow microspheres with hollow cavities inside, the inner diameter is 480nm, and a horizontal opening with a diameter of 350nm Pores, the inner layer of the semi-open hollow microspheres is TiO with a surface modification of 4-MBA probe molecule thickness of 8nm 2 thin film, on TiO 2 The outside of the film is also plated with a layer of Ag film with a thickness of 60nm.

[0063] Its preparation method comprises the following steps:

[0064] 1) The two-dimensional hexagonal close-packed polystyrene sphere array template was prepared by self-assembly method. The specific preparation method is as follows:

[0065] (1.1) Cleaning of silicon wafers: Put the silicon wafers into a beaker filled with ammonia water, hydrogen peroxide, and deionized water (volume ratio 1:2.5:8), heat to 100°C in a fume hood and boil for 10 minutes. After standing it at room tempe...

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
thicknessaaaaaaaaaa
thicknessaaaaaaaaaa
Login to View More

Abstract

The invention belongs to the technical field of nanocomposite materials, and in particular relates to a SERS substrate with a transverse nanocavity array structure, which is composed of semi-open hollow microspheres with a hollow cavity inside, and a transverse opening is arranged in the horizontal direction, so that The inner layer of the semi-open hollow microspheres is the TiO surface-modified 4‑MBA probe molecules. 2 thin film, on TiO 2 The outside of the film is also coated with a layer of precious metal film. It is prepared by combining the template method, supported by a plasma-cleaned polystyrene bead array, and TiO 2 and noble metals are obtained by means of tilted magnetron sputtering. The invention overcomes the defect that the SERS substrate in the prior art cannot effectively construct an electrical environment with the same electric field strength but different current densities, and the invention can construct an electrical environment with the same electric field strength but different current densities, which can be used to study plasma induction The charge transfer mechanism and the intermediate state theory of SERS physical enhancement and chemical enhancement.

Description

technical field [0001] The invention belongs to the technical field of nanocomposite materials, and in particular relates to a SERS substrate with a transverse nanocavity array structure and a preparation method thereof. Background technique [0002] In 1974, Fleischmann et al. first discovered when studying the spectrum generated by the adsorption of pyridine molecules on the surface of a rough silver electrode: in the Raman spectrum of the surface of a rough silver electrode, it shows a significantly enhanced and sharper than the Raman scattering spectrum of the same concentration solution. Characteristic Raman scattering bands. In 1977, Van Duyne et al systematically studied the same system. After excluding the factors of increase in the number of probe molecules and the influence of resonance, it was concluded that the enhancement of the Raman scattering signal of 5-6 orders of magnitude pyridine probe molecules comes from the surface of the rough electrode. Reinforceme...

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): G01N21/65
CPCG01N21/658
Inventor 张永军温嘉红王雅新赵晓宇陈雷高稔现
Owner 合肥九州龙腾科技成果转化有限公司