Ag/TiS2 layered composite substrate with SPR having strong SERS activity in near infrared and preparation method of Ag/TiS2 layered composite substrate

A composite substrate, near-infrared technology, applied in coatings, analytical materials, material excitation analysis, etc., can solve problems such as Raman scattering activity limitation, and achieve the effect of short experimental period and simple preparation method.

Inactive Publication Date: 2019-12-10
JILIN NORMAL UNIV
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Problems solved by technology

But TiS 2 The very weak surface-enhanced Raman scattering activity limits its application in the field of Raman scattering, so the design and research of Ag / TiS 2 Composite SERS active substrate can expand the scope of SERS technology theory and application

Method used

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  • Ag/TiS2 layered composite substrate with SPR having strong SERS activity in near infrared and preparation method of Ag/TiS2 layered composite substrate
  • Ag/TiS2 layered composite substrate with SPR having strong SERS activity in near infrared and preparation method of Ag/TiS2 layered composite substrate
  • Ag/TiS2 layered composite substrate with SPR having strong SERS activity in near infrared and preparation method of Ag/TiS2 layered composite substrate

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Embodiment Construction

[0020] The technical solution of the present invention will be further explained and described in the manner of specific embodiments below.

[0021] (1) Clean the silicon wafer. Cut the silicon wafer into 2×2cm 2 Put the small silicon chip into a beaker, and add a mixed solution of ammonia water, hydrogen peroxide and deionized water with a volume ratio of 1:2:6 into the beaker. Place the beaker on a scorching table and heat it to boiling, and keep it for 5-10 minutes. After cooling, pour out the liquid, and alternately use deionized water and absolute ethanol to repeatedly sonicate for 15 minutes.

[0022] (2) Preparation of hexagonal close-packed polystyrene bead arrays. Polystyrene beads with a diameter of 200nm and absolute ethanol are mixed at a volume ratio of 1:1, and the polystyrene beads are evenly dispersed by ultrasonic treatment, and the dispersed polystyrene beads are dropped on the large block with a pipette gun. Silicon wafers, so that the dispersion liquid i...

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Abstract

The invention discloses an Ag/TiS2 layered composite substrate with SPR having strong SERS activity in near infrared and a preparation method of the Ag/TiS2 layered composite substrate, and belongs tothe technical field of composite nano functional materials. The invention aims to improve the surface enhanced Raman scattering activity of TiS2 and obtain the substrate with higher Raman activity; the composite substrate provided by the invention is made of a composite material of Ag and TiS2; the composite structure is obtained by depositing Ag and TiS2 on polystyrene spheres of a 200 nm hexagonal close-packed array in a layered sputtering mode. The thickness of Ag is 10 nm, the thickness of TiS2 is 2-10 nm, the substrate has the adjustable SPR characteristic in the infrared region, and accurate regulation and control of SPR can be achieved by changing the thickness of TiS2.

Description

technical field [0001] The invention belongs to the technical field of composite nano functional materials. Background technique [0002] Localized surface plasmon resonance (LSPR) properties in noble metal nanoparticles have been studied for decades. However, in semiconductors such as Cu 2-x LSPRs are also found in S, ZnO, etc. When the doping amount of the semiconductor increases, the LSPR moves to the near-infrared region. Zhu et al. proved for the first time that in semimetallic TiS through theoretical analysis and experiments 2 LSPR characteristics also exist in the near-infrared region. This discovery extends the traditional nanoplasmonic technology to materials other than noble metals for the first time. Since then, LSPR is no longer regarded as a "unique" property of noble metals, but an optical characteristic of carrier collection. The LSPR of noble metal nanoparticles can be tuned by changing the size, shape, composition, or dielectric environment of the nano...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/65B82Y40/00B82Y30/00C23C14/20C23C14/06C23C14/35
CPCB82Y30/00B82Y40/00C23C14/0623C23C14/205C23C14/35G01N21/658
Inventor 张小龙张永军王雅新陈雷赵晓宇张帆
Owner JILIN NORMAL UNIV
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