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Mercapto-beta-cyclodextrin modified silver nano-rode array, its preparation method and its use

A technology of silver nanoarray and silver nanorod, which is applied in nanotechnology, nanotechnology, nanotechnology, etc. for materials and surface science, and can solve the problems of inability to produce environmental toxic pollutants

Inactive Publication Date: 2012-11-14
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, no matter it is a nano-biosensor or its manufacturing method, there are deficiencies. First, the nano-biosensor can only detect with high sensitivity the antigenic biotin target molecule containing a long chain in the detection process of biomolecules. And can not carry out trace detection to environmental toxic pollutant 3,3',4,4'-tetrachlorobiphenyl or 2,2',4,5,5'-pentachlorobiphenyl; Secondly, the preparation method can not make Sensors for Trace Detection of Environmental Toxic Pollutants 3,3',4,4'-Tetrachlorobiphenyl or 2,2',4,5,5'-Pentachlorobiphenyl

Method used

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  • Mercapto-beta-cyclodextrin modified silver nano-rode array, its preparation method and its use
  • Mercapto-beta-cyclodextrin modified silver nano-rode array, its preparation method and its use
  • Mercapto-beta-cyclodextrin modified silver nano-rode array, its preparation method and its use

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Experimental program
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Embodiment 1

[0034] The concrete steps of preparation are:

[0035] In step 1, a through-hole alumina template with a hole diameter of 60 nm is firstly obtained by secondary anodizing on the aluminum sheet. Then use the ion sputtering method to sputter a metal conductive film on one side of the through-hole aluminum oxide template; One or more than two kinds of superposition), wherein the thickness of the silver film is 50nm, and the thickness of the copper film is 20μm, and an aluminum oxide template with a metal conductive film on one side is obtained.

[0036] Step 2, first place the aluminum oxide template with a metal conductive film on one side in a silver electrolyte at a temperature of 10°C, use it as a working electrode, and deposit it at a deposition voltage of 0.2V, a frequency of 0.8KHz, and a waveform of square wave. Duty ratio is 48% pulse voltage under electrodeposition 5min, obtains the aluminum oxide template that silver nanorod is placed in the hole, one side is covered ...

Embodiment 2

[0038] The concrete steps of preparation are:

[0039] In step 1, a through-hole alumina template with a pore diameter of 68 nm is obtained by using a secondary anodic oxidation method on the aluminum sheet. Then use the ion sputtering method to sputter a metal conductive film on one side of the through-hole aluminum oxide template; One or two or more of them are superimposed), wherein the thickness of the silver film is 90nm, and the thickness of the copper film is 28μm, and an aluminum oxide template with a metal conductive film on one side is obtained.

[0040] Step 2, first place the aluminum oxide template with a metal conductive film on one side in a silver electrolyte at a temperature of 12°C, use it as a working electrode, and deposit it at a deposition voltage of 0.35V, a frequency of 0.9KHz, and a square wave waveform. Duty ratio is 49% pulse voltage under electrodeposition 4min, obtains the aluminum oxide template that silver nanorod is placed in the hole, one side...

Embodiment 3

[0042] The concrete steps of preparation are:

[0043]In step 1, a through-hole alumina template with a pore diameter of 75 nm is obtained by using a secondary anodic oxidation method on the aluminum sheet. Then use the ion sputtering method to sputter a metal conductive film on one side of the through-hole aluminum oxide template; One or two or more of them are superimposed), wherein the thickness of the silver film is 125nm, and the thickness of the copper film is 35μm, and an aluminum oxide template with a metal conductive film on one side is obtained.

[0044] Step 2, first place the aluminum oxide template with a metal conductive film on one side in a silver electrolyte at a temperature of 13°C, use it as a working electrode, and deposit it at a deposition voltage of 0.5V, a frequency of 1KHz, and a square wave waveform. The empty ratio is 50% pulse voltage under electrodeposition 3min, obtains the aluminum oxide template that has silver nanorod in the hole, one side is ...

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Abstract

The invention discloses a mercapto-beta-cyclodextrin modified silver nano-rod array, its preparation method and its use. The array is a silver nano-rod array with the surface modified by mercapto-beta-cyclodextrin, wherein the lengths of silver nano-rods are 150-600nm, the diameters of the silver nano-rods are 60-90nm, the space between each two silver nano-rods is 10-40nm, and the substrate of the array is formed by superposing one or more than two of a silver film, a gold film, a copper film and a nickel film which have the thicknesses of 20-50mum. The preparation method comprises the following steps: obtaining a through hole alumina template through using a secondary anode oxidation method, sputtering a metal conductive film on one surface of the through hole alumina template through using an ion sputtering method to obtain an alumina template with the metal conductive film, carrying out electric deposition through placing the alumina template with the metal conductive film in a silver electrolyte to obtain an alumina template with holes provided with the silver nano-rods and one surface coated with the metal conductive film, etching off the alumina template through putting the resultant alumina template in an acidic or strongly alkaline solution, and immersing the resultant material in an aqueous solution of the mercapto-beta-cyclodextrin for at least 1h to prepare the mercapto-beta-cyclodextrin modified silver nano-rod array. The mercapto-beta-cyclodextrin modified silver nano-rod array can be used for rapidly detecting trace PCB77 or PCB101.

Description

technical field [0001] The invention relates to a nanorod array, its preparation method and application, in particular to a silver nanorod array modified by mercapto-β-cyclodextrin, its preparation method and application. Background technique [0002] Under the action of an external alternating electromagnetic field, the free electrons on the surface of nano-units such as noble metal silver will be polarized and collectively oscillated. When the frequency of the external electromagnetic field is equal to the oscillation frequency of free electrons, the surface plasmon resonance (SPR) phenomenon will occur, and the SPR effect can significantly increase the local electromagnetic field strength. In order to make full use of the SPR effect, people have made some attempts and efforts, such as "a high-sensitivity nano-biosensor manufacturing method" disclosed in the Chinese invention patent application publication specification CN 101144809A published on March 19, 2008. The produ...

Claims

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Application Information

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IPC IPC(8): C25D3/46C25D5/48C25D11/12C23C14/18B82Y40/00B82Y30/00
Inventor 黄竹林孟国文黄青李祥东朱储红
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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