Transplantable ultrathin nano-porous gold film and method for preparing the same

A technology of nanopores and thin films, which is applied in the field of nanomaterials and thin film materials, and can solve problems such as difficult mass production and preparation of uniform nanoporous metal films.

Inactive Publication Date: 2009-11-04
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is very difficult to prepare a uniform nanoporous metal film. For example, it is necessary to deposit noble metals on the original template to form a porous metal film, which is difficult to produce in batches.

Method used

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  • Transplantable ultrathin nano-porous gold film and method for preparing the same
  • Transplantable ultrathin nano-porous gold film and method for preparing the same
  • Transplantable ultrathin nano-porous gold film and method for preparing the same

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Embodiment Construction

[0019] The following examples further describe the ultra-thin nanoporous gold film proposed by the present invention

[0020] Using freshly cleaved mica flakes as the base, in 4×10 -3 Under the vacuum degree of Pa, the mixture of Au and Cu (Au x Cu 1-x ). The thickness of the alloy film is monitored by a quartz oscillator. Then, the sample was placed in an oven and annealed in an atmospheric atmosphere at a temperature of 200°C for 25 hours. Afterwards, the film is immersed in 0.1 mol / L dilute hydrochloric acid for corrosion treatment to remove Cu oxide and unoxidized nano Cu in the film. In the process of corrosion with hydrochloric acid, the gold film will spontaneously peel off from the mica substrate. The area of ​​the peeled gold film sample can reach 4cm. 2 about. The sample is repeatedly washed with deionized water to remove reaction products and other impurities adsorbed on the surface of the film. Finally, save it in deionized water for later use.

[0021] Scanning electr...

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Abstract

The invention belongs to the technical field of nanometer materials and thin film materials, and in particular relates to a transplantable ultrathin nanoporous gold membrane and a preparation method thereof. The Au-Cu alloy film was prepared by vacuum thermal evaporation, and after thermal annealing and dealloying with acid solution, a transplantable and self-supporting ultra-thin nanoporous gold film was prepared. The nanoporous gold membrane prepared by the invention has wide applications in the fields of catalysis, biosensing, porous electrodes, energy storage, microfluidic control and transmission media. The nanoporous gold film proposed by the invention also has special optical properties and high light transmission properties, and has important applications in the fields of nano gratings, nonlinear optics and near-field optics.

Description

Technical field [0001] The invention belongs to the technical field of nano materials and thin film materials, and specifically relates to a transplantable ultra-thin nanoporous gold film and a preparation method thereof. technical background [0002] Nano-materials are obviously different from traditional continuous solid materials. Due to the nano-size effect and the large specific surface area effect, such materials will exhibit special physical and chemical properties, including special optoelectronic functional properties, transmission properties, and mechanical properties. Nanomaterials come in many forms, such as nanoparticles, nanorods, nanowires, thin films with nanometer thickness, and nanosolid (nanophase) materials. The definition of nanomaterials is mainly based on scale effects, so nanomaterials can be nano-scale entities or nano-scale spaces. [0003] Porous precious metal materials have received extensive attention due to their excellent chemical stability and wid...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C30/00C23F17/00C23C14/24C23C14/14C23C14/18C23G1/00
Inventor 徐伟周辉金兰
Owner FUDAN UNIV
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