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Gold nanowire modified titanium dioxide nano pillar array SERS substrate material as well as preparation method thereof and application thereof

A nano-column array and titanium dioxide technology, which is applied in the direction of material analysis, material excitation analysis, and material analysis through optical means, can solve the problems of large-scale preparation of difficult-to-reactive substrates and limit practical applications, and achieve sensitivity, reusability, and enhanced reliability. Reproducible, high-sensitivity results

Active Publication Date: 2018-11-13
XUZHOU MEDICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the reproducibility of SERS substrates is still an urgent problem
Although the nanoprinting method can produce active substrates with good reproducibility, it is difficult to achieve large-scale preparation of active substrates, which limits its practical application.

Method used

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  • Gold nanowire modified titanium dioxide nano pillar array SERS substrate material as well as preparation method thereof and application thereof
  • Gold nanowire modified titanium dioxide nano pillar array SERS substrate material as well as preparation method thereof and application thereof
  • Gold nanowire modified titanium dioxide nano pillar array SERS substrate material as well as preparation method thereof and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] The invention provides a method for preparing a titanium dioxide nanocolumn array SERS substrate material modified by gold nanowires. The specific preparation steps of the method are as follows:

[0040] S1. Put the FTO conductive glass into the mixed solution of hydrochloric acid and titanium source for hydrothermal reaction to obtain the conductive glass loaded with titanium dioxide nano-column array film.

[0041] Cut the FTO conductive glass into a size of 1cm×4cm, ultrasonically clean it in acetone and deionized water for 10min, and dry it for later use.

[0042] Take 18mL of deionized water in a 50mL beaker, add 18mL of concentrated hydrochloric acid with a mass concentration of 36-38%, stir for 5min, then add 0.54mL of butyl titanate, and stir rapidly for 10min to prepare a mixed solution of hydrochloric acid and butyl titanate . In this embodiment, the titanium source is butyl titanate, and in other embodiments, the titanium source can also be any one of ethyl ...

Embodiment 2

[0050] The difference between this example and Example 1 is that in step S3, the amount of chloroauric acid solution added to the mixed solution containing gold ions is 0.25mL, and the titanium dioxide nanocolumn array SERS substrate material modified by gold nanowires is obtained. Example 1 is the same.

Embodiment 3

[0052] The difference between this example and Example 1 is that in step S3, the amount of chloroauric acid solution in the mixed liquid solution containing gold ions is 0.6mL, and the titanium dioxide nanocolumn array SERS substrate material modified by gold nanowires is obtained, and other Same as Example 1.

[0053] It should be noted that, in the above examples, according to the order of the addition of chloroauric acid (0.25mL, 0.6mL and 0.9mL) in the hydrothermal reaction solution from low to high, the prepared gold nanowire modified titanium dioxide nanocolumn Array SERS substrate materials are abbreviated as Au(1) / TiO 2 / FTO, Au(2) / TiO 2 / FTO and Au(3) / TiO 2 / FTO.

[0054] Result analysis

[0055] (1) Characterization of gold nanowire-modified titanium dioxide nanopillar array SERS substrate materials

[0056] see figure 1 , which is an actual photo of the FTO conductive glass loaded with titanium dioxide nanocolumn array film and gold nanowire modified titanium ...

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Abstract

The invention provides a gold nanowire modified titanium dioxide nano pillar array SERS substrate material as well as a preparation method thereof and application thereof. The method comprises the following steps: taking conductive glass as a carrier to firstly grow a titanium dioxide nano pillar array on the surface of the conductive glass to obtain conductive glass loaded with a titanium dioxidenano pillar array film; soaking the conductive glass loaded with the titanium dioxide nano pillar array film into a mixed solution containing gold ions to perform hydrothermal reaction to deposit a gold nanowire, cleaning with deionized water and drying after the reaction is ended, thereby preparing the gold nanowire modified titanium dioxide nano pillar array SERS substrate material. The SERS substrate material prepared by the invention has relatively good SERS enhancing effect, also has good uniformity, stability and photocatalytic self-cleaning performance, and can be applied to analysis and detection of organic and inorganic biological molecules.

Description

technical field [0001] The invention relates to the technical field of analysis and detection of organic and biomolecules, in particular to a gold nanowire-modified titanium dioxide nanocolumn array SERS substrate material and a preparation method and application thereof. Background technique [0002] Surface-enhanced Raman scattering (surface-enhanced Raman scattering, SERS) signals can not only give molecular structure information, realize molecular fingerprint identification, but also have clear spectral peaks, fast analysis speed, high detection sensitivity, and even single-molecule detection And other advantages, it has shown broad application prospects in the fields of surface science, chemical and biological sensors, biomedical detection, and trace analysis. [0003] The preparation of SERS active substrates is the prerequisite for obtaining SERS signals. Whether it is theoretical research or applied research, it is necessary to prepare substrate materials with good S...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/65
CPCG01N21/658
Inventor 王永张敏徐凯吴长宇李菁菁韩翠平庄银苹
Owner XUZHOU MEDICAL UNIV
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