Titanium substrate with in-situ growth of metal nanoparticles on the surface and its application

Abstract

The invention discloses a titanium substrate with in-situ growth of metal nanoparticles on the surface and an application thereof, and belongs to the field of enhanced Raman substrate preparation technology and detection. In the present invention, the pretreated titanium substrate is immersed in the chemical deposition solution, deposited at 0-60°C for 30s-2 hours, cleaned and dried to obtain the titanium substrate with in-situ growth of metal nanoparticles on the surface, wherein the chemical deposition solution The components include 5-40g / L ammonium fluoride, 1-50g / L metal salt, 5-30g / L citric acid and 0.1-1vol% strong acid. The invention regulates the etching rate of particles on the surface of the titanium substrate and the diffusion rate of trivalent titanium ions, so that the metal particle reduction reaction occurs in solution near the surface of the substrate, so that metal elements are loaded on the surface of the titanium substrate in the form of nanoparticles. A more uniform, compact, and dead-angle-free nanoparticle layer is achieved on the titanium-based surface, which greatly improves the effect of surface-enhanced Raman.

Description

technical field [0001] The invention relates to a titanium substrate with in-situ growth of metal nanoparticles on the surface and an application thereof, belonging to the field of enhanced Raman substrate preparation technology and detection. Background technique [0002] Since the discovery of surface-enhanced Raman scattering in 1974, Raman detection has gradually become one of the most attractive analytical tools in the field of ultrasensitive detection. In terms of small molecule detection, surface-enhanced Raman technology is also considered to be one of the most promising research directions. By using surface-enhanced Raman imaging technology, it is also possible to obtain multi-target analysis and biological image signals with higher spatial resolution, enabling the visualization of distribution regions of different dopant materials. Label-free detection can also be achieved when analyzing various biological samples. With the introduction of electromagnetic field t...

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Problems solved by technology

[0005] Aiming at the problems that the surface of the enhanced Raman substrate prepared by the traditional method will have varying degrees of uneven distribution of metal nanoparticles, the nanoparticles are easy to fall off, the preparation process is cumbersome, and it cannot be used in large quantities. The present invention provides a method using in-situ chemical deposition The method, through a one-pot reduction reaction in the solution phase, directly obtains metal nanoparticles / titanium surface-enhanced Raman substrates, which improves the four major disadvantages of the above-mentioned traditional methods.

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