Method for preparing silver/carbon composite nanoring structure by laser

A carbon composite and nano-ring technology is applied in the field of preparing silver/carbon composite nano-rings to achieve the effect of widening the field and low cost

Inactive Publication Date: 2013-03-20
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But so far there is no research on the preparation of silver/carbon composite r

Method used

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  • Method for preparing silver/carbon composite nanoring structure by laser
  • Method for preparing silver/carbon composite nanoring structure by laser
  • Method for preparing silver/carbon composite nanoring structure by laser

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Prepare a 0.5mM silver nitrate ethanol solution in the dark, the purpose of which is to prevent the silver nitrate from being decomposed by light. The configured silver nitrate ethanol solution can be completely dissolved by ultrasonication in an ice bath. The purpose of the ice bath is to prevent the temperature from being too high during ultrasonication, and the silver nitrate will be decomposed by heat.

[0022] Pipette 3ml of the prepared silver nitrate ethanol solution into a quartz tube that does not absorb laser light, move the quartz tube to the laser light path, so that the parallel light spot of the millisecond pulse laser completely covers the entire solution from above the solution, and the nanosecond pulse laser The parallel light spot and the millisecond pulse laser spot are 90°, facing the middle part of the solution;

[0023] The 1064nm millisecond pulse laser and the 1064nm nanosecond pulse laser are connected by a linkage device, so that the light emit...

Embodiment 2

[0027] Implementation process is the same as embodiment 1;

[0028] The laser parameters of the millisecond pulse laser are 130A, 6ms, 1Hz, and the single pulse energy is 7.36J; the laser parameters of the nanosecond pulse laser are 650V, 1Hz, and the single pulse energy is 303mJ. After 5 minutes, the dispersed silver / carbon composite nanorings with neat edges were obtained.

Embodiment 3

[0030] Implementation process is the same as embodiment 1;

[0031] The laser parameters of the millisecond pulse laser are set to 130A, 6ms, 1Hz, and the single pulse energy is 7.36J; the laser parameters of the nanosecond pulse laser are 650V, 1Hz, and the single pulse energy is 303mJ. After irradiating the solution for 0.5 min, neatly dispersed silver / carbon composite nanorings were obtained.

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Abstract

The invention discloses a method for preparing a silver/carbon composite nanoring structure by laser. The method comprises the following steps of (1) preparing a 0.5mM silver nitrate ethanol solution in a sun shielding way; (2) removing a 3ml silver nitrate ethanol solution, and placing in a quartz tube which does not absorb laser; and (3) connecting a 1064nm millisecond pulse laser with a 1064nm nanosecond pulse laser by a connecting device, ensuring to maintain the laser emitting time of the millisecond pulse laser and the laser emitting time of the nanosecond pulse laser to be in one pulse, and radiating the system by the connected pulse laser for 1second to 30 minutes, so as to obtain a dispersive silver/carbon composite nanoring structure with regular edges. The method for preparing the silver-based nanoring has the advantages that the environment-friendly effect is realized, the pollution is avoided, the simplicity and the rapidity are realized, and the shape of the prepared nanoring is novel and particular.

Description

technical field [0001] The invention relates to composite nanomaterials, in particular to a method for preparing silver / carbon composite nanorings by adopting millisecond / nanosecond double-pulse laser ablation technology. Background technique [0002] Nanoring structures have attracted extensive attention due to their very good metallic tunable optical resonance, persistent current response, and optomagnetic behavior of semiconducting nanorings. The currently prepared nanorings are mainly bimetallic nanoring structures, and there are two main methods for preparing nanoring structures: nanosphere etching and electron beam technology. For example, L.You et al. used the surface potential reduction process to prepare SiO 2 Composite colloidal materials of Au nanorings, and found to have high activity and liquid-phase catalyzed recyclability; first prepared SiO 2 colloid, and disperse it in the containing -NH 2 In the solution, heated at 80°C for 2 hours, washed with ethanol a...

Claims

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Application Information

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IPC IPC(8): B22F9/24B22F9/30
Inventor 杜希文米军杨静
Owner TIANJIN UNIV
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