Method for preparing Ag-Au bimetal composite film based on bovine serum albumin regulation and control

A technology of bovine serum albumin and composite membranes, which is applied in the field of preparation of two-dimensional structure nano-metal composite membranes, to achieve the effects of improved optical stability, high stability and uniformity, and mild reaction conditions

Active Publication Date: 2020-09-25
SHAANXI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In summary, through the analysis of relevant literature, it is found that BSA molecules mainly modify, stabilize and reduce nano-metals in the preparation process of nano-Ag and Au particles, while regulating nano-Ag and Au particles based on the interface of two-dimensional colloidal crystals The research method of Au conversion preparation has not been reported

Method used

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  • Method for preparing Ag-Au bimetal composite film based on bovine serum albumin regulation and control
  • Method for preparing Ag-Au bimetal composite film based on bovine serum albumin regulation and control
  • Method for preparing Ag-Au bimetal composite film based on bovine serum albumin regulation and control

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Effect test

Embodiment 1

[0047] 1. Preparation of two-dimensional colloidal monolayer film

[0048] Weigh 0.05g PS@PAA and add it into 10mL water and absolute ethanol volume ratio of 1:1 mixed solution, ultrasonically disperse for 30min, stir at room temperature for 12h (constant 600r / min speed), and prepare 0.5g / L PS@PAA suspension Liquid; Insert a clean glass sheet at 45° to the liquid surface into a crystallization dish filled with an aqueous solution of sodium dodecyl sulfate with a mass concentration of 0.3mmol / L, stir with a glass rod for 5min, and then dissolve the obtained PS@PAA suspension Added dropwise to the glass sheet, and dispersed along the glass sheet to the air-liquid interface, PS@PAA immediately self-assembled and formed a tightly packed two-dimensional colloidal monolayer film. Finally, the two-dimensional colloidal monolayer film formed at the interface was transferred to the surface of a silicon wafer (1 cm × 1 cm) treated with a mixture of concentrated sulfuric acid and 30% aqu...

Embodiment 2

[0056] In step 3 of this embodiment, put the nano-silver film prepared in step 2 into 2 mL of 0.1 mg / mL BSA aqueous solution, with the film side facing up, soak at room temperature in the dark for 2 hours, then take it out and rinse it with absolute ethanol for 2 hours. ~3 times, avoid light and dry naturally. Other steps are identical with embodiment 1.

Embodiment 3

[0058] In step 3 of this embodiment, put the nano-silver film prepared in step 2 into 2 mL of 1.0 mg / mL BSA aqueous solution, with the film side facing up, soak at room temperature in the dark for 2 hours, then take it out and rinse it with absolute ethanol for 2 hours. ~3 times, avoid light and dry naturally. Other steps are identical with embodiment 1.

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Abstract

The invention discloses a method for preparing an Ag-Au bimetallic composite film based on bovine serum albumin regulation and control. The method is characterized in that a silver film with a uniformperiodic nanostructure is prepared by a simple and efficient ion sputtering method by taking a two-dimensional colloidal crystal constructed by macromolecular composite microgel as a substrate, a uniformly assembled BSA film is regulated and controlled on the surface of the silver film, not only the stability of the nano-silver film can be remarkably improved, but also the regulation and controlof the Ag-Au bimetal replacement reaction process can be realized by utilizing the auxiliary reduction effect of the BSA. More importantly, the method only needs to simply change the concentration ofthe tetrachloro-alloyed acid and the concentration of the BSA, so that the Ag-Au bimetal composite nanoparticle membrane structure can be adjusted, and meanwhile, the surface plasma resonance performance of the Ag-Au bimetal composite membrane material can be adjusted and controlled.

Description

technical field [0001] The invention belongs to the technical field of preparation of a two-dimensional structure nano-metal composite film, and in particular relates to a method for preparing an Ag-Au bimetallic nano-structure composite film based on bovine serum albumin (BSA) regulation. Background technique [0002] Silver nanoparticles have unique plasma characteristics, high catalytic activity and excellent bactericidal properties, etc., but silver nanoparticles are easily oxidized and extremely unstable during use; nano-Au particles have high chemical stability and biocompatibility . Bimetallic composite nanomaterials formed by nano-Ag and nano-Au composites in different ways not only have the advantages of both nano-Ag and nano-Au, but also the synergistic effect of bimetallic composition and structure can significantly enhance its optical and electrical properties. It has been widely used in important fields such as catalysis, sensing, imaging and photothermal conve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C14/34C23C14/20C23C18/44C23C28/02
CPCC23C14/3442C23C14/205C23C18/44C23C18/166C23C28/023
Inventor 张颖邹永瑾杨楠赵心毓
Owner SHAANXI NORMAL UNIV
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