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Metal nanocrystalline interface carbon base material super assembly controllable growth method

A technology of metal nanocrystals and noble metal nanocrystals, applied in metal material coating technology, nano-carbon, electrolytic coatings, etc., to achieve the effects of strong operability, high yield, and strong universality of the method

Active Publication Date: 2020-09-11
NEW MATERIAL INST OF SHANDONG ACADEMY OF SCI
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Problems solved by technology

[0005] In order to overcome the technical defects of the existing single SERS material of metal nanocrystals, the present invention provides a kind of porous V-shaped alumina as a template, and at the same time adopts multi-phase interface super-assembly method to prepare noble metal nanocrystals to form a periodic array with controllable structure structure, and through the plasma chemical deposition (PECVD) method, the nanocrystals are coated with carbon-based materials on the surface in situ to obtain multi-component super-assembled nanocrystal-carbon-based composite materials

Method used

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  • Metal nanocrystalline interface carbon base material super assembly controllable growth method
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  • Metal nanocrystalline interface carbon base material super assembly controllable growth method

Examples

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Effect test

Embodiment 1

[0035] Embodiment 1 (Au sphere synthesis)

[0036] 10mL HAuCl 4 (2.5ⅹ10 -4 M) and CTAB (0.1M) mixed solution is placed in a 50mL conical flask, take the existing 10 -2 M NaBH 4 Add 600 μL of the brown solution to the above mixture quickly, place it in a constant temperature shaker at 300 rpm for 2 minutes, and then let it stand at 27°C for 3 hours to make NaBH 4 After fully reacting, the CTAB-coated gold cluster solution was obtained.

[0037] Take 50 μL of the above-prepared gold cluster solution, 2 mL of CTAC (0.2M) solution, 1.5 mL of ascorbic acid AA (0.1 M) solution, mix them in a 20 mL glass reagent bottle, mix well, and add 2 mL of HAuCl at one time 4 (5ⅹ10 -4 M) The solution was reacted at 27° C. for 15 minutes. The product was enriched by centrifugation at 8000rpm for 30 minutes, washed 3 times with deionized water, and finally dispersed in 1 mL of CTAC (2ⅹ10 -2 M) A 10nm gold seed solution was obtained in the solution for later use.

[0038] Take 10 μL of the...

Embodiment 2

[0040] Embodiment 2 (interfacial assembly of Au monolayer film)

[0041] Take 1 mL of the 50 nm CTAC-gold nanosphere solution prepared above and dilute it to 10 mL with water, centrifuge at 8000 rpm for 15 minutes to enrich, remove the supernatant until the volume is less than 200 μL, add 1 mL of 1% PVP / ethanol solution (PVP, Mw=55000) and shake for 30 seconds, keep standing and mix overnight.

[0042] The above mixed solution was centrifuged at 7500rpm for 15 minutes for enrichment, the supernatant was removed, and finally dispersed in 1 mL of ethanol solution to obtain a gold nanosphere solution replaced by PVP on the surface.

[0043] Take 200 μL of the 50 nm PVP-gold nanosphere solution prepared above, mix it with 800 μL of dichloromethane and 2 mL of deionized water in a centrifuge tube and shake evenly. The solution is in the middle dichloromethane layer, then slowly add n-hexane to the inclined liquid surface until the Au balls form a bright film and let it stand for 2...

Embodiment 3

[0044] Example 3 (AAO@Au interface superassembly)

[0045] Firstly, the prepared AAO porous template was cut into a 1ⅹ1 cm square, the array was ultrasonically cleaned in acetone, ethanol, and aqueous solution for 10 minutes and dried with nitrogen, and soaked in 30% hydrogen peroxide for 2 hours to make the AAO surface Hydroxyl and hydrophilic, wash with water and ethanol to remove the residue and dry.

[0046] figure 2 It is the top view and side view of the pre-prepared AAO array structure. It can be seen from the figure that the pore structure presents a uniform V-shaped structure, which is arranged periodically and has good repeatability. Structure, effectively prepared three-dimensional porous array template.

[0047] Hold both sides of the AAO porous template with tweezers so that the front faces up, put the assembled LS gold single-layer film at the edge under the liquid surface and carefully lift it up horizontally, dry it at 50°C and save it for later use, and the...

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Abstract

The invention discloses a metal nanocrystalline interface carbon base material super assembly controllable growth method and belongs to the technical field of nano materials. According to the new method, a periodical array structure with a controllable structure is formed, a plasma enhanced chemical vapor deposition (PECVD) method is used for conducting surface carbon base material in-situ cladding on nanocrystalline, and the multi-element super assembly nanocrystalline-carbon base composite material is obtained. The metal nanocrystalline interface carbon base material super assembly controllable growth method has the beneficial effects that the SERS array material prepared by adopting an AAO as the template has a controllable shape and good repeatability, due to the porous array structure, the template structure can be used for conducting effective hot spot regulation, and stability of the method is high. The adopted preparing method is simple, operability is high, the cost is low, environment friendliness is good, efficiency is high, the method can be adopted as a method for large-scale batched production of SERS substrates with good performance, the preparing method is easily used for industrial production, and popularity of the method is high.

Description

technical field [0001] The invention belongs to the field of interface chemistry, and in particular relates to a super-assembled and controllable growth method of a metal nanocrystal interface carbon-based material. Background technique [0002] Since the 21st century, nanotechnology has developed rapidly in the field of chemistry and has become one of the important contents of the scientific and technological industrial revolution. The development of nanomaterials has laid a foundation for the development of nanoscience and technology. Nanomaterials are also developing rapidly in the field of material science due to the high controllability of their components and morphology. By optimizing and adjusting the composition, size, morphology, arrangement and other parameters of nanomaterials, nanomaterials with different properties and properties can be prepared. Effective functional materials. Due to their unique chemical, physical, optical, and electrical properties, noble me...

Claims

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Application Information

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IPC IPC(8): C23C16/26C23C16/50C23C16/02C25D11/12B22F9/24C01B32/186
CPCC23C16/26C23C16/50C23C16/0281C25D11/045C25D11/12B22F9/24C01B32/186
Inventor 梁秀许冠辰李宁刘家庆李勇高萌
Owner NEW MATERIAL INST OF SHANDONG ACADEMY OF SCI
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