Gold nanotube array with gold and sliver nanowires built on surface and preparation method and application thereof

Abstract

The invention discloses a gold nanotube array with gold and sliver nanowires built on the surface and a preparation method and application thereof. The gold and sliver nanowires growing on the radial direction of each tube are built on the inner wall and the outer wall of each gold nanotube of the array, wherein the external diameter of each gold nanotube is 60-80 nm, the lengths of the gold and sliver nanowires are 6-10 nm, and the diameters of the wires are 3-6 nm. The method comprises the following steps: using an aluminum sheet to manufacture a through-hole alumina template with a two-step anodic oxidation method, carrying out evaporation deposition of gold film on one surface of the through-hole alumina template, then putting the through-hole alumina template into gold electrolyte for electro-deposition, and thus obtaining the alumina template which is coated with the gold film on one surface and provided with gold nanotubes in holes; removing the alumina template in an acid or alkali solution, and putting the gold nanotube array in mixed liquid of aniline and lauryl sodium sulfate for ultrasonic reaction; sequentially adding a chloroauric acid solution and a silver nitrate solution drop by drop in the mixed liquid subjected to the ultrasonic reaction, leaving to stand at the room temperature, and thus obtaining the target product. The target product can be used as an SERS substrate and is used for tract detection of organic pollutants.

Description

technical field

[0001] The invention relates to a gold nanotube array, its preparation method and application, in particular to a gold nanotube array with gold and silver nanowires on its surface, its preparation method and application. Background technique

[0002] Since the discovery of carbon nanotubes (CNTs), it has been found that nanotubes of other materials also have unique physical properties, so the synthesis of nanotubes of various materials has attracted people's attention. Among them, in addition to good electrical conductivity, excellent mechanical properties and optical properties, gold (Au) nanotubes can also produce surface-enhanced Raman scattering (SERS) effect through the interaction between free electrons on the surface and incident light. As a powerful tool for trace detection, SERS technology has high sensitivity and "fingerprint effect", and has broad application prospects in the fields of environment, chemistry, and biology. Recently, people have mad...

Examples

Embodiment 1

[0039] The concrete steps of preparation are:

[0040] Step 1, first use the secondary anodic oxidation method on the aluminum sheet to obtain a through-hole alumina template, and evaporate a gold film on one side of the through-hole alumina template; wherein, the gold-plated film is ion sputtering, and the sputtering current is 40mA , The time is 8 minutes. Then put the aluminum oxide template covered with a gold film on one side in the gold electrolyte, at 15μA / cm 2 Electrodeposition under constant current for 10min; Among them, the gold electrolyte is 10g / L chloroauric acid solution, 5g / L ethylenediaminetetraacetic acid solution, 160g / L sodium sulfite solution and 30g / L dipotassium hydrogen phosphate trihydrate solution mixture to obtain an alumina template covered with a gold film and with gold nanotubes in the holes.

[0041] Step 2, first place the alumina template covered with a gold film and gold nanotubes in the holes in an acid or alkaline solution to remove the al...

Embodiment 2

[0044] The concrete steps of preparation are:

[0045] Step 1, first use the secondary anodic oxidation method on the aluminum sheet to obtain a through-hole alumina template, and evaporate a gold film on one side of the through-hole alumina template; wherein, the gold-plated film is ion sputtering, and the sputtering current is 40mA , The time is 10 minutes. Then put the aluminum oxide template covered with a gold film on one side in the gold electrolyte, at 18μA / cm 2 Electrodeposition under constant current for 9min; Among them, the gold electrolyte is 10g / L chloroauric acid solution, 5g / L ethylenediaminetetraacetic acid solution, 160g / L sodium sulfite solution and 30g / L dipotassium hydrogen phosphate trihydrate solution mixture to obtain an alumina template covered with a gold film and with gold nanotubes in the holes.

[0046] Step 2, first place the alumina template covered with a gold film and gold nanotubes in the holes in an acid or alkaline solution to remove the al...

Embodiment 3

[0049] The concrete steps of preparation are:

[0050] Step 1, first use the secondary anodic oxidation method on the aluminum sheet to obtain a through-hole alumina template, and evaporate a gold film on one side of the through-hole alumina template; wherein, the gold-plated film is ion sputtering, and the sputtering current is 40mA , The time is 12 minutes. Then put the aluminum oxide template covered with a gold film on one side in the gold electrolyte, at 20μA / cm 2 Electrodeposition under constant current for 8min; Among them, the gold electrolyte is 10g / L chloroauric acid solution, 5g / L ethylenediaminetetraacetic acid solution, 160g / L sodium sulfite solution and 30g / L dipotassium hydrogen phosphate trihydrate solution mixture to obtain an alumina template covered with a gold film and with gold nanotubes in the holes.

[0051] Step 2, first place the alumina template covered with a gold film and gold nanotubes in the holes in an acid or alkaline solution to remove the al...

technical field

[0001] The invention relates to a gold nanotube array, its preparation method and application, in particular to a gold nanotube array with gold and silver nanowires on its surface, its preparation method and application. Background technique

[0002] Since the discovery of carbon nanotubes (CNTs), it has been found that nanotubes of other materials also have unique physical properties, so the synthesis of nanotubes of various materials has attracted people's attention. Among them, in addition to good electrical conductivity, excellent mechanical properties and optical properties, gold (Au) nanotubes can also produce surface-enhanced Raman scattering (SERS) effect through the interaction between free electrons on the surface and incident light. As a powerful tool for trace detection, SERS technology has high sensitivity and "fingerprint effect", and has broad application prospects in the fields of environment, chemistry, and biology. Recently, people have mad...

Examples

Embodiment 1

[0039] The concrete steps of preparation are:

[0040] Step 1, first use the secondary anodic oxidation method on the aluminum sheet to obtain a through-hole alumina template, and evaporate a gold film on one side of the through-hole alumina template; wherein, the gold-plated film is ion sputtering, and the sputtering current is 40mA , The time is 8 minutes. Then put the aluminum oxide template covered with a gold film on one side in the gold electrolyte, at 15μA / cm 2 Electrodeposition under constant current for 10min; Among them, the gold electrolyte is 10g / L chloroauric acid solution, 5g / L ethylenediaminetetraacetic acid solution, 160g / L sodium sulfite solution and 30g / L dipotassium hydrogen phosphate trihydrate solution mixture to obtain an alumina template covered with a gold film and with gold nanotubes in the holes.

[0041] Step 2, first place the alumina template covered with a gold film and gold nanotubes in the holes in an acid or alkaline solution to remove the al...

Embodiment 2

[0044] The concrete steps of preparation are:

[0045] Step 1, first use the secondary anodic oxidation method on the aluminum sheet to obtain a through-hole alumina template, and evaporate a gold film on one side of the through-hole alumina template; wherein, the gold-plated film is ion sputtering, and the sputtering current is 40mA , The time is 10 minutes. Then put the aluminum oxide template covered with a gold film on one side in the gold electrolyte, at 18μA / cm 2 Electrodeposition under constant current for 9min; Among them, the gold electrolyte is 10g / L chloroauric acid solution, 5g / L ethylenediaminetetraacetic acid solution, 160g / L sodium sulfite solution and 30g / L dipotassium hydrogen phosphate trihydrate solution mixture to obtain an alumina template covered with a gold film and with gold nanotubes in the holes.

[0046] Step 2, first place the alumina template covered with a gold film and gold nanotubes in the holes in an acid or alkaline solution to remove the al...

Embodiment 3

[0049] The concrete steps of preparation are:

[0050] Step 1, first use the secondary anodic oxidation method on the aluminum sheet to obtain a through-hole alumina template, and evaporate a gold film on one side of the through-hole alumina template; wherein, the gold-plated film is ion sputtering, and the sputtering current is 40mA , The time is 12 minutes. Then put the aluminum oxide template covered with a gold film on one side in the gold electrolyte, at 20μA / cm 2 Electrodeposition under constant current for 8min; Among them, the gold electrolyte is 10g / L chloroauric acid solution, 5g / L ethylenediaminetetraacetic acid solution, 160g / L sodium sulfite solution and 30g / L dipotassium hydrogen phosphate trihydrate solution mixture to obtain an alumina template covered with a gold film and with gold nanotubes in the holes.

[0051] Step 2, first place the alumina template covered with a gold film and gold nanotubes in the holes in an acid or alkaline solution to remove the al...

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