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Silver triangular nano-particle array/single-layer graphene thin film composite

A nanoparticle array, thin film composite material technology, applied in graphene, nanocarbon, nanotechnology and other directions, can solve problems affecting device performance, unavoidable pollution and damage, achieve good optoelectronic performance, ensure integrity, and ensure cleanliness sexual effect

Pending Publication Date: 2020-09-08
YANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the way to use this thin film is to use it as a device building unit by transferring it. However, for graphene with only an atomic level or a few nanometers thick, it will inevitably be polluted and damaged during the transfer process, which will affect the performance of the device.

Method used

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  • Silver triangular nano-particle array/single-layer graphene thin film composite
  • Silver triangular nano-particle array/single-layer graphene thin film composite
  • Silver triangular nano-particle array/single-layer graphene thin film composite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] (1) CVD growth of single-layer graphene film. Put a copper foil (Alfa Aesar, 99.8%) with a thickness of 25 μm into a tube furnace, and anneal at 1000 °C for 30 min in a mixed atmosphere of hydrogen (100 sccm) and argon (300 sccm) to remove oxides on the surface of the copper foil; Add methane (10 sccm) again, turn off the hydrogen and methane after growing for 30 min, and cool to room temperature under the protection of argon, and a single-layer graphene film can be grown on the copper foil. (2) Synthesis of PS ball template / single layer graphene film / copper foil. PS sphere suspension (2.5 wt%) with a diameter of 1 μm and ethanol were ultrasonically mixed at a volume ratio of 1:1. Add an appropriate amount of deionized water to a clean glass slide to form a large-area thin water film, take about 0.1 mL of the PS sphere mixture to the surface of the water film, and the PS spheres spontaneously self-assemble at the gas-liquid-solid interface to form a large-area single-l...

Embodiment 2

[0036] Other steps and processing conditions are identical with embodiment 1. The difference is that before step (3), the two single-layer PS ball templates obtained in step (2) were heat-treated at 110°C / 10min and 110°C / 20min respectively to obtain Silver triangular nanoparticle array / single-layer graphene film / copper foil morphology ( Figure 5 a) Silver triangular nanoparticle array / single-layer graphene film / copper foil morphology under heating conditions of 110°C / 20min ( Figure 5 b).

[0037] Compared Figure 5 a and Figure 5 b, combined simultaneously image 3, we can find that the heat treatment of the PS sphere template has a significant effect on the triangular size, and as the heating time of the PS sphere template before the deposition of silver increases, the size of the final silver triangular nanoparticles also decreases. Therefore, the size of the silver triangular nanoparticles can be tuned by changing the heating conditions of the PS sphere template bef...

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Abstract

The invention discloses a silver triangular nano-particle array / single-layer graphene thin film composite. A method comprises the steps that a single-layer graphene film grows on copper foil; secondly, a single-layer PS ball mold plate is assembled and is transferred to the copper foil attached with single-layer graphene; then, thermal evaporation is used for depositing silver, and in the deposition process, a sample is kept still; and finally, a PS ball is removed to obtain the silver triangular nano-particle array on the single-layer graphene film. The silver triangular nano-particle array controllably grows on the single-layer graphene, advantages of the silver triangular nano-particle array and the single-layer graphene and the coordinated effect of the two are combined, the higher SERS property is achieved, due to the in situ synthesis on the copper foil with the graphene growing on, the damage of the graphene is avoided, and perfectness and cleanliness of the graphene can be ensured.

Description

technical field [0001] The invention belongs to the technical field of graphene-based composite nanomaterials, in particular to a silver triangular nanoparticle array / single-layer graphene film composite material and a preparation method thereof. Background technique [0002] Graphene has many excellent properties, such as good electrical and thermal conductivity, good toughness, large specific surface area, etc. These properties make graphene-based composite materials present many excellent properties. For example, using graphene as a carrier to support nanoparticles can improve the performance of these particles in catalysis, sensing, and energy storage. For example, in surface-enhanced Raman scattering (SERS) detection, the combination of graphene and noble metal nanostructures can make full use of the chemical enhancement of graphene itself and the large physical enhancement of noble metals, as well as the large specific surface and strong adsorption capacity of graphene...

Claims

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Application Information

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IPC IPC(8): C23C16/26C23C14/24C23C14/20C01B32/194C01B32/186B82Y30/00B82Y40/00
CPCC23C16/26C23C14/24C23C14/20C01B32/186C01B32/194B82Y30/00B82Y40/00
Inventor 何辉程建祥范璐瑶杨金彭曾祥华
Owner YANGZHOU UNIV
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