SERS substrate of metal-modified semiconductor-based bionic compound eye bowl structure and construction method

Patent metadata

Field	Value
Publication number	US-11119047-B2
Application number	US-202017082894-A
Country	US
Kind code	B2
Filing date	Oct 28, 2020
Priority date	Oct 29, 2019
Publication date	Sep 14, 2021
Grant date	Sep 14, 2021

Abstract

The present invention discloses an SERS substrate of a metal-modified semiconductor-based bionic compound eye bowl structure and a construction method, and belongs to the technical field of nano materials. The present invention is based on a multi-time interface self-assembly method. Firstly, a small ball template is constructed by using a gas-liquid interface assembly process. Then, a semiconductor bowl structure array is induced to be formed by the template by using a solid-liquid interface assembly process. Next, a semiconductor bowl is assembled to a surface of a pyramid-shaped cone to form a bionic compound eye structure by using a transfer process. Finally, a surface of the bionic compound eye structure is modified with a layer of uniformly distributed metal particles by a physical deposition method or a chemical deposition method, thereby forming the SERS substrate of the metal-modified semiconductor-based bionic compound eye bowl structure.

First claim

What is claimed is:

1. A construction method of an SERS substrate of a metal-modified semiconductor-based bionic compound eye bowl structure, comprising the following steps:
(1) performing self-assembly on small balls with a diameter of 0.01-10 μm in a gas-liquid interface to obtain closely arranged single-layer balls;
(2) transferring the single-layer balls obtained in step (1) to a surface of a semiconductor precursor solution, assembling semiconductor films on surfaces of the small balls below liquid level in situ to obtain small balls with the semiconductor films attached to lower surfaces;
(3) transferring the small balls with the semiconductor films attached to the lower surfaces obtained in step (2) to surface of a cone-shaped structure substrate, and then removing the small balls to obtain an SERS substrate of a semiconductor-based bionic compound eye bowl structure; and
(4) modifying a surface of the SERS substrate of the semiconductor-based bionic compound eye bowl structure obtained in step (3) with metal particles to obtain the SERS substrate of the metal-modified semiconductor-based bionic compound eye bowl structure that consists of cone-shaped structure substrates and semiconductor-based bionic compound eye bowl structures on surfaces of the cone-shaped structure substrates;
wherein a height of the cone-shaped structure substrate is 1-100 μm, and a particle size of the metal particles is 1-100 nm; and
a material of the semiconductor films is silicon, metal oxide, metal sulfide, metal phosphide or a conductive polymer.

2. The construction method according to claim 1 , wherein a material of the metal particles is one or more of gold, silver, palladium, platinum, copper, lithium or sodium.

3. The construction method according to claim 1 , wherein a material of the cone-shaped structure substrate is one or more of silicon, silicon dioxide, metal oxide, metal sulfide, metal phosphide, a thermosetting polymer, a thermoplastic polymer, a photocuring polymer, polydimethylsiloxane or a derivative of these materials.

4. The construction method according to claim 1 , wherein in step (4), the surface of the SERS substrate of the semiconductor-based bionic compound eye bowl structure are modified with the metal particles by a magnetron sputtering, physical vapor deposition, atomic layer deposition, chemical vapor deposition or precursor solution reaction method.

5. The construction method according to claim 1 , wherein a material of the small balls is one of silicon dioxide, polystyrene, polymethyl methacrylate, polyacrylic acid, polylactic acid, chitosan, gelatin, albumin, starch or a derivative of these materials.

6. The construction method according to claim 1 , wherein the small balls are removed by a solvent washing, solution washing, high-temperature calcination or dry etching method.

7. A method for detecting a Raman signal comprising a step for measuring the Raman signal on a subject in need with the SERS substrate of the metal-modified semiconductor-based bionic compound eye bowl structure of claim 1 .

8. The method according to claim 7 , wherein the subject contains harmful substances.

Assignees

• Univ Jiangnan

Inventors

• Shi Gang
• Li Ying
• Chen Jie
• Jin Xuan
• Wang Likui
• Wang Dawei
• Yang Jingguo
• Sang Xinxin
• Ni Caihua

Classifications

• B22F1/0545

  Dispersions or suspensions of nanosized particles · CPC title

• G01N33/18

  Water · CPC title

• B82Y40/00

  Manufacture or treatment of nanostructures · CPC title

• B82Y30/00

  Nanotechnology for materials or surface science, e.g. nanocomposites · CPC title

• G01N2021/655

  Stimulated Raman · CPC title