Method for preparing Ag/ZnO core-shell nanostructure by adopting pulse laser liquid ablation

A technology of nanostructure and liquid phase sintering, which is applied in the direction of nanotechnology, can solve the problems of restricting the application of chemical methods, and achieve the effect of simple and easy process operation and short preparation cycle

Active Publication Date: 2015-01-28
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

So far, there have been many articles on the preparation of Ag/ZnO core-shell nanostructures, but all of them are chemical synthesis methods. The chemical synthesis method has the character...

Method used

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  • Method for preparing Ag/ZnO core-shell nanostructure by adopting pulse laser liquid ablation
  • Method for preparing Ag/ZnO core-shell nanostructure by adopting pulse laser liquid ablation
  • Method for preparing Ag/ZnO core-shell nanostructure by adopting pulse laser liquid ablation

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Embodiment 1

[0029] Soak the Ag target and Zn target in nitric acid for 1 minute to remove the surface oxide layer, mechanically polish the Ag and Zn targets with fine sandpaper, and ultrasonically clean the polished Ag and Zn metal targets in absolute ethanol and deionized water with an ultrasonic cleaner. . The ablation device used in the experiment was figure 1 shown. Place the cleaned Ag target on the bottom of a beaker filled with 10ml of deionized water, and place the beaker on a rotating platform at a rotation speed of 10 rpm. A KrF excimer laser with a wavelength of 248 nm (single pulse energy 400 mJ, repetition rate 10 Hz) was reflected and then focused on the surface of the Ag target to ablate the Ag target for 30 minutes. Take out the Ag target, place the Zn target in the prepared Ag colloid, and place the beaker on the rotating platform at a rotation speed of 10 rpm. The same laser parameters (wavelength 248nm, single pulse energy 400mJ, repetition frequency 10Hz) were used ...

Embodiment 2

[0035] Soak the Ag target and Zn target in nitric acid for 1 minute to remove the surface oxide layer, mechanically polish the Ag and Zn targets with fine sandpaper, and ultrasonically clean the polished Ag and Zn metal targets in absolute ethanol and deionized water with an ultrasonic cleaner. . The ablation device used in the experiment was figure 1 shown. Place the cleaned Ag target on the bottom of a beaker filled with 10ml of deionized water, and place the beaker on a rotating platform at a rotation speed of 15 rpm. A KrF excimer laser with a wavelength of 248 nm (single pulse energy 400 mJ, repetition rate 10 Hz) was reflected and then focused on the surface of the Ag target to ablate the Ag target for 20 minutes. Take out the Ag target, place the Zn target in the prepared Ag colloid, and place the beaker on the rotating platform at a rotation speed of 15 rpm. The same laser parameters (wavelength 248nm, single pulse energy 400mJ, repetition frequency 10Hz) were used ...

Embodiment 3

[0038] Soak the Ag target and Zn target in nitric acid for 1 minute to remove the surface oxide layer, mechanically polish the Ag and Zn targets with fine sandpaper, and ultrasonically clean the polished Ag and Zn metal targets in absolute ethanol and deionized water with an ultrasonic cleaner. . The ablation device used in the experiment was figure 1 shown. Place the cleaned Ag target on the bottom of a beaker filled with 10ml of deionized water, and place the beaker on a rotating platform at a rotation speed of 30 rpm. A KrF excimer laser with a wavelength of 248 nm (single pulse energy 400 mJ, repetition rate 10 Hz) was reflected and then focused on the surface of the Ag target to ablate the Ag target for 20 minutes. Take out the Ag target, place the Zn target in the prepared Ag colloid, and place the beaker on the rotating platform at a rotation speed of 30 rpm. Using the same laser parameters (wavelength 248nm, single pulse energy 400mJ, repetition rate 10Hz) to perfor...

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Abstract

The invention discloses a method for preparing an Ag/ZnO core-shell nanostructure by adopting pulse laser liquid ablation and belongs to the field of material preparation. Two-step pulse laser liquid ablation is adopted, oxide layers of an Ag target and a Zn target are removed by using nitric acid, and ultrasonic cleaning is performed. The method comprises the following steps of ablating the Ag target in deionized water by using excimer laser with the wavelength of 248nm, the single pulse energy of 400mJ and the repetition frequency of 10Hz to obtain Ag colloid; ablating the Zn target in the Ag colloid by using the same laser to obtain the Ag/ZnO core-shell nanostructure. According to the method, preparation equipment is simple, the preparation is quick and safe without pollution, the surface plasma resonance absorption of the prepared Ag/ZnO core-shell nanostructure can be adjusted, and the Ag/ZnO core-shell nanostructure has other excellent photoelectric properties and has a good application prospect in the fields of optics, electrics, catalysis and the like.

Description

technical field [0001] The invention belongs to the field of material preparation. Background technique [0002] There is a strong coupling effect between the noble metal surface resonant plasmon and semiconductor excitons, especially the core-shell structure represented by Ag / ZnO has many unique properties in terms of electricity, optics, and catalysis, and has great potential in the field of micro-nano optoelectronic devices. application potential. So far, there have been many articles on the preparation of Ag / ZnO core-shell nanostructures, but all of them are chemical synthesis methods. The chemical synthesis method has the characteristics of mature technology and easy control, but the chemical synthesis method inevitably introduces some Impurities, which greatly limit the application of chemically synthesized Ag / ZnO products. The pulsed laser liquid phase ablation method is a simple, fast and green method for preparing nanomaterials. The pulsed laser is used to ablate ...

Claims

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Application Information

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IPC IPC(8): B22F9/04B22F1/02B82Y40/00
Inventor 赵艳李双浩蒋毅坚
Owner BEIJING UNIV OF TECH
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