Noble metal ordered nanostructure array and its preparation method and use

A nanostructure and precious metal technology, applied in the direction of nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problems of time-consuming consumables, complicated production process, product growth, etc., and achieve good consistency and repeatability , The preparation method is simple, and the consistency is good

Inactive Publication Date: 2017-09-26
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although the product can be used as an active substrate for surface-enhanced Raman scattering, laser Raman spectrometer is used to measure the trace amount of rhodamine or 2,3,3'-trichlorobiphenyl attached to it, but there are also unsatisfactory parts. First of all, the distance between the gold nanorods that make up the gold nanorod array in the product is the same as the rod diameter of 40-80nm, and the distance between the silver nanoparticles coated on the top of the gold nanorods is also the same as its particle size. Larger gaps are difficult to generate stronger electromagnetic fields; secondly, the preparation method can neither obtain products with smaller gaps between nano-units, but also has complex manufacturing processes and time-consuming consumables - template preparation, evaporation electrodes, product growth, reinforcement Defects such as the substrate and the removal of the template cannot allow the alumina template to be reused, resulting in higher costs, which is not conducive to the commercial application of the product

Method used

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  • Noble metal ordered nanostructure array and its preparation method and use
  • Noble metal ordered nanostructure array and its preparation method and use
  • Noble metal ordered nanostructure array and its preparation method and use

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Experimental program
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Embodiment 1

[0050] The concrete steps of preparation are:

[0051] Step 1: First place the aluminum sheet in -1°C, 1.5wt% phosphoric acid solution, anodize it at 190V DC constant voltage for 4.5h, and then soak it in 55°C phosphochromic acid mixture for 11h. Next, put it again under the same process conditions for the second anodic oxidation for 13 hours, first remove the unoxidized aluminum on the back with a saturated tin chloride solution, and then place it in a 12wt% phosphoric acid solution at 48°C to remove After the barrier layer, the hole was expanded for 5 minutes to obtain a through-hole alumina template with a hole diameter of 160nm, a hole period of 470nm, and a hexagonal concave-convex structure array between the holes; wherein, the hexagonal concave-convex structure is formed by the outer wall of the hole and the surrounding pits, the hole The inner wall is formed between adjacent pits, the pits are all located at the hexagons of the hexagonal concave-convex structure, the t...

Embodiment 2

[0054] The concrete steps of preparation are:

[0055] Step 1: first place the aluminum sheet in 0°C, 1.3wt% phosphoric acid solution, anodize it at 193V DC constant voltage for 4.3h, and then soak it in 58°C phosphoric chromic acid mixture for 10.5h. Next, put it under the same process conditions for the second anodic oxidation for 13.5 hours, remove the unoxidized aluminum on the back with a saturated tin chloride solution, and then place it in an 11wt% phosphoric acid solution at 49°C After removing the barrier layer, the hole was expanded for 10 minutes to obtain a through-hole alumina template with a hole diameter of 215nm, a hole period of 478nm, and an array of hexagonal concave-convex structures between the holes; where the hexagonal concave-convex structure is formed by the outer wall of the hole and the surrounding pits, The inner wall formed between the adjacent pits between the holes is composed of the pits located at the hexagons of the hexagonal concave-convex st...

Embodiment 3

[0058] The concrete steps of preparation are:

[0059] Step 1: first place the aluminum sheet in a 1°C, 1wt% phosphoric acid solution, anodize it at a DC constant voltage of 195V for 4 hours, and then soak it in a phosphochromic acid mixture at 60°C for 10 hours. Then, put it again under the same process conditions for the second anodic oxidation for 14 hours, first remove the unoxidized aluminum on the back with a saturated tin chloride solution, and then place it in a 10wt% phosphoric acid solution at 50°C to remove After the barrier layer, the hole was expanded for 15 minutes to obtain a through-hole alumina template with a hole diameter of 270nm, a hole period of 486nm, and an array of hexagonal concave-convex structures between the holes; wherein, the hexagonal concave-convex structure is formed by the outer wall of the hole and the surrounding pits, the hole The inner wall is formed between the adjacent pits, the pits are all located at the hexagons of the hexagonal conc...

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Abstract

The invention discloses a noble metal ordered nanostructure array, a preparation method and application thereof. The array is composed of a gold-silver alloy nano-hexagonal prism array or a porous gold nano-hexagonal prism array. The end of the nano-hexagonal prism is provided with protrusions at the hexagons with a height ≤ 20nm, and the column structure period of the nano-hexagonal prism is 470-500nm. The column height of the nano-hexagonal prism is 50-200nm, the column wall of the nano-hexagonal prism is concave arc, and the column gap between adjacent nano-hexagonal prisms is 5-50nm; the method is to use the secondary anodic oxidation method to obtain a pore diameter of 160-380nm , the pore period is 470-500nm, and the hole is a through-hole alumina template with a hexagonal concave-convex structure array. The alumina template is applied with a pressure of ≤5.7×106N / m2 to obtain the target product. It can be used as an active substrate for surface-enhanced Raman scattering, and the content of rhodamine or methylparathion or PCB‑3 attached to it can be measured using a laser Raman spectrometer.

Description

technical field [0001] The invention relates to an ordered nanostructure array, its preparation method and application, in particular to a precious metal ordered nanostructure array, its preparation method and application. Background technique [0002] In recent years, surface-enhanced Raman scattering (SERS) technology based on the electromagnetic field enhancement mechanism of gold, silver, copper and other noble metal nanostructures has the advantages of simplicity, speed, and high sensitivity, and can accurately reflect the fingerprint information of chemical and biomolecular structures. One of the compelling trace detection techniques. Theoretical and experimental studies have shown that the SERS effect mainly comes from the enhanced electromagnetic field generated between nanounits. When the gap between nanounits is less than 10nm, a strong local coupling electric field will be generated at the gap, which is usually called SERS "hot spot". Therefore, in order to obta...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/65C25B11/12B82Y30/00B82Y40/00
Inventor 陈斌孟国文黄竹林周飞
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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