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Electron-doped ZnO nanocrystalline substrate and preparation method and application

A technology of electronic doping and nanocrystals, which is applied in the field of spectral detection, can solve the problems of enhancing Raman scattering signals and infrared absorption signals of probe molecules, unfavorable, surface treatment or improper surface treatment, etc., to achieve length optimization and improve film formation Ability, effect of maintaining dispersion

Inactive Publication Date: 2018-12-18
SHENZHEN UNIV
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  • Abstract
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Problems solved by technology

[0006] In view of the above-mentioned deficiencies in the prior art, the object of the present invention is to provide a kind of electron-doped type ZnO nanocrystal substrate and preparation method and application, the problem that aims to solve: the existing electron-doped type ZnO nanocrystal is not carried out Surface treatment or improper surface treatment is not conducive to enhancing the Raman scattering signal and infrared absorption signal of probe molecules

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  • Electron-doped ZnO nanocrystalline substrate and preparation method and application
  • Electron-doped ZnO nanocrystalline substrate and preparation method and application
  • Electron-doped ZnO nanocrystalline substrate and preparation method and application

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preparation example Construction

[0031] The present invention provides a kind of preferred embodiment of the preparation method of electron-doped type ZnO nanocrystal substrate, comprises as follows:

[0032] Step A, preparing electron-doped ZnO nanocrystals by thermal injection method.

[0033] Preparation of electron-doped ZnO nanocrystals by thermal injection is familiar to those skilled in the art, and a thermal injection method provided by the present invention specifically includes the following:

[0034] Step A1, under a protective atmosphere (such as nitrogen or argon) and 140-160 ° C, prepare A solution and B solution respectively, wherein the A solution is octadecylene with dopant and zinc stearate as the solute solution, the preferred concentration is 0.2-0.5 mmol / mL, preferably, the molar percentage of the dopant accounting for the whole solute is 1-6%, more preferably, the dopant concentration is 5%, which has the best SERS Effect. The dopant is acetylacetonate containing doping elements, such ...

Embodiment 1

[0044] Embodiment 1 (gallium doping amount is 3% zinc oxide)

[0045] Dissolve 0.97mmol of zinc stearate and 0.03mmol of gallium acetylacetonate in 25mL of octadecene solution to make A solution, raise the temperature to 140°C under the protection of argon, keep it for 20min, then raise the temperature to 270°C; take 5g Dissolve stearyl alcohol in 5mL octadecene solution to make solution B, raise the temperature to 160°C for 20 minutes under the protection of argon, then quickly inject it into solution A, the temperature of the mixed solution will drop to about 250°C, and then heat up again within 10 minutes to 270°C, and keep it warm for 1h to grow nanocrystals.

[0046] The nanocrystals were washed with 20mL of ethyl acetate, 20mL of n-hexane, and 20mL of ethanol, and collected by centrifugation at a centrifugation rate of 9000 rpm for 10min. The nanocrystals were configured as a n-hexane solution with a concentration of 5 mg / mL. Take 3 parts of 1mL n-hexane solution, conf...

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Abstract

The invention discloses an electron-doped ZnO nanocrystalline substrate and a preparation method and application. The preparation method comprises the following steps that 1, electron-doped ZnO nanocrystalline is prepared by adopting a hot injection method; 2, surface treatment is conducted on the electron-doped ZnO nanocrystalline by adopting Mills salt to remove long carbon chain ligands on thesurface, then the surface is modified with C2-C8 carbon chain ligands, and the modified electron-doped ZnO nanocrystalline is obtained; and 3, the modified electron-doped ZnO nanocrystalline is prepared into a solution, the solution is applied to a substrate and dried, and the electron-doped ZnO nanocrystalline substrate is obtained. According to the electron-doped ZnO nanocrystalline substrate and the preparation method and application, surface treatment is conducted on the electron-doped ZnO nanocrystalline through the Mills salt, the surface is modified with the C2-C8 carbon chain ligands,therefore, the dispersity of the nanocrystalline can be kept, the film forming capability of the nanocrystalline on the substrate is improved, and Raman scattering signals and infrared absorption signals of probe molecules are enhanced.

Description

technical field [0001] The invention relates to the field of spectrum detection, in particular to an electron-doped ZnO nanocrystal substrate, a preparation method and an application. Background technique [0002] Raman spectrum is a kind of scattering spectrum discovered and named by Indian scientist C.V. Raman in 1928. Because light induces instantaneous deformation of electron cloud distribution on molecular bonds, which causes changes in molecular polarizability, the molecular structure of the material can be revealed by monitoring the difference in incident light frequency. Infrared spectroscopy is the spectral line obtained by different absorption frequencies of different chemical bonds and functional groups when infrared light is used to irradiate organic molecules, also known as molecular vibrational spectroscopy. Surface-enhanced Raman scattering (SERS) and surface-enhanced infrared absorption (SEIRA) are two complementary surface spectral signal enhancement techni...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B05D7/24C01G9/02B82Y30/00
CPCB82Y30/00C01G9/02B05D7/24
Inventor 曾昱嘉徐振宇胡亮袁君
Owner SHENZHEN UNIV
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