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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 art, gaseous chemical plating, etc., can solve the problem of not being able to prepare surface-enhanced Raman scattering active products, silver nanoparticles Easy, impossible to do and other problems, to achieve the effect of eliminating oxidation of silver nanoparticles, scientific preparation method, and low cost

Inactive Publication Date: 2015-07-01
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, 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 specific steps of preparation are:

[0031] Step 1, firstly coat a zinc acetate ethanol solution with a concentration of 10 mmol / L on the substrate, and wash and disperse it with ethanol after drying; where the substrate is a silicon wafer. Then, the substrate with zinc acetate placed on it 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 ammonia complex solution with a temperature of 75°C and a concentration of 0.03 mol / L, using it as the cathode and graphite sheet as the anode. 0.3mA / cm 2 Electrodeposition was carried out for 5 hours to obtain a substrate on which an array of zinc oxide nanorods with sharp tops was placed; wherein the zinc nitrate ammonia complex solution was prepared by gradually injecting ammonia into the stirred zinc nitrate solution, Until it changes from turbid to clear.

[0033] Step 3. Place ...

Embodiment 2

[0035] The specific steps of preparation are:

[0036] Step 1. First, apply a zinc acetate ethanol solution with a concentration of 13 mmol / L to the substrate, and then wash and disperse it with ethanol after drying; where the substrate is a silicon wafer. The substrate with zinc acetate placed on it was thermally decomposed at 320° C. for 23 minutes, and the above-mentioned coating, dispersion and thermal decomposition process was repeated twice to obtain a substrate covered with a zinc oxide seed layer.

[0037] Step 2. Place the substrate covered with the zinc oxide seed layer in a zinc nitrate ammonia complex solution with a temperature of 79°C and a concentration of 0.04 mol / L, using it as the cathode and graphite sheet as the anode. 0.4mA / cm 2 Electrodeposition for 4.5 hours to obtain a substrate on which an array of zinc oxide nanorods with sharp tops is placed; wherein the zinc nitrate ammonia complex solution is prepared by gradually injecting ammonia into the stirred zinc...

Embodiment 3

[0040] The specific steps of preparation are:

[0041] In step 1, first coat a zinc acetate ethanol solution with a concentration of 16 mmol / L on the substrate, and then wash and disperse it with ethanol after it is dried; where the substrate is a silicon wafer. The substrate with zinc acetate placed on it was thermally decomposed at 335°C for 22 minutes, and the coating, dispersion and thermal decomposition process was repeated three 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 ammonia complex solution with a temperature of 83°C and a concentration of 0.05 mol / L, using it as the cathode and graphite sheet as the anode. 0.5mA / cm 2 Electrodeposition was carried out for 4 hours to obtain a substrate on which an array of zinc oxide nanorods with sharp tops was placed; wherein the zinc nitrate ammonia complex solution was prepared by gradually injecting ammonia into the st...

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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 and a preparation method and application thereof, in particular to a zinc oxide nanorod array modified with silver nanoparticles and a preparation method and application thereof. Background technique [0002] Based on the unique properties of nano-scale zinc oxide that are significantly different from similar bulk materials, people have made unremitting efforts to explore and expand its application range. As mentioned in the Chinese Patent Application Publication CN 1562888A published on January 12, 2005, "a silver surface-modified nano-zinc oxide and its preparation method", the silver surface-modified nano-zinc oxide is composed of: The surface of nano-zinc oxide particles is embellished or coated with nano-silver oxide. The particle size of nano-zinc oxide particles is 10-100 nanometers, and the silver content is 0.01-30% (w / w); the preparation method is the precursor of preparing nano-zinc oxide. Then, the zinc ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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