Preparation method and use of copper-based three-dimensional nano-structure material
A technology of three-dimensional nano and structured materials, which is applied in the fields of material analysis, material excitation analysis, and material analysis through optical means, etc. It can solve the problems of high cost of gold, easy oxidation of silver, and complex preparation process of nanomaterials, and achieve detection sensitivity High efficiency, high test efficiency, and convenient preparation
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0027] Such as figure 1 As shown, the 100μm thick alloy strip Mg 72 Cu 28 Dip into the hydrochloric acid solution of pH=1.3, pH=0.62, and pH=0.17, and de-alloy at room temperature to obtain the copper-based three-dimensional nanostructure SERS substrate with corrosion time of 0.5h, 1h, 3h, 6h, 12h, 24h, 36h. Material, the obtained material is washed with ultrapure water to remove the residual chemicals on the surface, and finally vacuum-dried, leaving it for the Raman test.
[0028] The copper-based three-dimensional nanostructure materials prepared in this example were respectively subjected to scanning electron microscopy analysis to obtain figure 2 As shown in the scanning electron microscope image, we can see from the figure that the obtained copper-based three-dimensional nanomaterial has a multi-level structure, which is conducive to the local surface electromagnetic field coupling on the surface of the material and generates high-density SERS hot spots. At the same time, t...
Embodiment 2
[0034] Such as figure 1 As shown, multiple 100μm thick alloy strips Mg 61 Cu 28 Gd 11 Respectively immerse in acidic solution with pH=0.62, carry out dealloying reaction at room temperature, respectively corrode for 1 hour, 3 hours, 6 hours and 9 hours, and clean the obtained materials with ultrapure water to remove the residual chemicals on the surface. Finally, vacuum drying is carried out and left for Raman testing.
[0035] The copper-based three-dimensional nanostructure materials obtained in this example were observed under a scanning electron microscope to obtain scanning electron micrographs of the copper-based three-dimensional nanostructure materials obtained under different etching times, such as Figure 5 As mentioned, we can see from the figure that as the reaction time increases, the particle aggregation state in the material changes, that is to say, the particle spacing becomes smaller, and these particle spacings produce a large number of nano gaps, thus becoming hi...
Embodiment 3
[0040] The 100μm thick alloy strip Mg 61 Cu 28 Y 11 Immerse in acidic solution with pH=0.62, de-alloying at room temperature for 3 hours, clean the obtained material with ultrapure water to remove the residual chemicals on the surface, and finally vacuum dry. Use the obtained material as the SERS substrate to perform surface-enhanced Raman detection on crystal violet (CV) solutions of different concentrations under the excitation of a 633nm laser. Figure 8 Raman spectrum shown. Compared with Example 2, it can be seen that the fine-tuning of the alloy composition does not reduce the surface enhanced Raman performance, and the copper-based three-dimensional nanostructure material suitable as the SERS substrate can still be prepared, which reduces the requirement for precursor selection. Figure 8 It can be seen that the detection limit of the substrate is even as low as 10 -14 M, can achieve single-molecule level detection. It fully proves the application prospect of the copper-...
PUM
Login to View More Abstract
Description
Claims
Application Information
Login to View More