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Silver nanoparticle-modified zinc oxide nanorod array and preparation method and application thereof

A technology of zinc oxide nanorods and silver nanoparticles, which is applied in the process of producing decorative surface effects, decorative arts, gaseous chemical plating, etc., can solve the problem that surface-enhanced Raman scattering active products and silver nanoparticles cannot be obtained. It can solve the problems of easy and ineffectiveness, and achieve the effect of eliminating the oxidation of silver nanoparticles, scientific preparation method and low cost.

Inactive Publication Date: 2013-04-10
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

However, both the final morphology of silver-surface-modified nano-zinc oxide and its preparation method have shortcomings. First, the final product can only be used for antibacterial, and cannot be used as a surface-enhanced Raman scattering (SERS) active substrate. Applied to sensors based on the SERS effect, so as to be widely used in the fields of environment, chemistry, biology, etc.; secondly, the preparation method cannot produce products with surface-enhanced Raman scattering activity, and the formation of the final product requires high-temperature calcination, so that its surface Silver nanoparticles are easily oxidized

Method used

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  • Silver nanoparticle-modified zinc oxide nanorod array and preparation method and application thereof
  • Silver nanoparticle-modified zinc oxide nanorod array and preparation method and application thereof
  • Silver nanoparticle-modified zinc oxide nanorod array and preparation method and application thereof

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Embodiment 1

[0030] The concrete steps of preparation are:

[0031] Step 1, first coating the zinc acetate ethanol solution with a concentration of 10mmol / L on the substrate, cleaning and dispersing it with ethanol after drying; wherein, the substrate is a silicon wafer. Then, the substrate with zinc acetate placed thereon was thermally decomposed at 300° C. for 24 minutes to obtain a substrate covered with a zinc oxide seed layer.

[0032] Step 2, place the substrate covered with the zinc oxide seed layer in a zinc nitrate ammonium complex solution with a temperature of 75°C and a concentration of 0.03mol / L, using it as the cathode and the graphite sheet as the anode. 0.3mA / cm 2 Under electrodeposition for 5 hours, a substrate with an array of zinc oxide nanorods with sharp tops formed on it was obtained; wherein, the preparation of the zinc nitrate ammonium complex solution was to gradually inject ammonia into the stirred zinc nitrate solution, until it changes from cloudy to clear.

...

Embodiment 2

[0035] The concrete steps of preparation are:

[0036] Step 1, first coating the zinc acetate ethanol solution with a concentration of 13mmol / L on the substrate, cleaning and dispersing it with ethanol after drying; wherein, the substrate is a silicon wafer. Then place the substrate with zinc acetate on it at 320° C. for 23 minutes to thermally decompose, repeat the above-mentioned coating, dispersion and thermal decomposition process for 2 times, and then obtain the substrate covered with the zinc oxide seed layer.

[0037] Step 2, place the substrate covered with the zinc oxide seed layer in a zinc nitrate ammonium complex solution with a temperature of 79°C and a concentration of 0.04mol / L, using it as the cathode and the graphite sheet as the anode, at a current density 0.4mA / cm 2 After 4.5 hours of electrodeposition, a substrate with an array of zinc oxide nanorods with sharp tops on it was obtained; wherein, the preparation of the zinc nitrate ammonium complex solution ...

Embodiment 3

[0040] The concrete steps of preparation are:

[0041] Step 1, firstly coating the zinc acetate ethanol solution with a concentration of 16mmol / L on the substrate, and cleaning and dispersing it with ethanol after drying; wherein, the substrate is a silicon wafer. Then place the substrate with zinc acetate on it at 335° C. for 22 minutes and repeat the process of coating, dispersion and thermal decomposition for 3 times to obtain a substrate covered with a zinc oxide seed layer.

[0042] Step 2, place the substrate covered with the zinc oxide seed layer in a zinc nitrate ammonium complex solution with a temperature of 83°C and a concentration of 0.05mol / L, using it as the cathode and the graphite sheet as the anode, at a current density 0.5mA / cm 2 Under electrodeposition for 4 hours, a substrate with an array of zinc oxide nanorods with sharp tops formed on it was obtained; wherein, the preparation of the zinc nitrate ammonium complex solution was to gradually inject ammonia ...

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Abstract

The invention discloses a silver nanoparticle-modified zinc oxide nanorod array, a preparation method thereof and application thereof. An array consisting of zinc oxide nanorods is arranged on a substrate; the length of the zinc oxide nanorods is 1 to 1.4mu.m; the diameter of the rods is 50 to 60nm; the size of silver nanoparticles at the top ends of the rods is 100 to 120nm; the size of the silver nanoparticles on the surfaces of the rods is 25 to 35nm; the distance between the particles is less than or equal to 10nm; the distance between the silver nanoparticles at the top ends of the adjacent rods is 40 to 60nm; and the distance between the silver nanoparticles on the surfaces of the adjacent rods is 25 to 35nm. The method comprises the following steps of coating a zinc acetate ethanol solution on the substrate; after drying the substrate, cleaning, dispersing and thermally decomposing the substrate to obtain a substrate on which a zinc oxide seed layer is coated; performing electro-deposition on the substrate coated with the zinc oxide seed layer in a zinc nitrate ammonia complexation solution to obtain a substrate with the zinc oxide nanorod array; and performing silver ion sputtering on the substrate in an ion sputter to obtain the target product. The silver nanoparticle-modified zinc oxide nanorod array can serve as an active substrate of SERS (Surface Enhanced Raman Scattering) and is used for measuring rhodamine 6G or polychlorinated biphenyl 77.

Description

technical field [0001] The invention relates to a nanorod array, its preparation method and application, in particular to a zinc oxide nanorod array modified with silver nanoparticles, its preparation method and application. Background technique [0002] Zinc oxide based on nanoscale has unique properties that are obviously different from similar bulk materials. People have made unremitting efforts to explore and expand its application range. For example, "a silver surface modified nano-zinc oxide and its preparation method" mentioned in the Chinese invention patent application publication CN 1562888A published on January 12, 2005, wherein the composition of the silver surface-modified nano-zinc oxide is as follows: The surface of the nano-zinc oxide particles is dotted or coated with nano-silver oxide, the particle size of the nano-zinc oxide particles is 10-100 nanometers, and the silver content is 0.01-30% (w / w); the preparation method is to first prepare the precursor of...

Claims

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Application Information

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IPC IPC(8): B81B7/04B81C1/00G01N21/65
CPCG01N21/658
Inventor 唐海宾孟国文张倬
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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