Silver nanowire and M-phase vanadium dioxide nanoparticle composite film and preparation method thereof

A vanadium dioxide nanometer and silver nanowire technology, applied in chemical instruments and methods, nanotechnology, nanotechnology, etc., can solve the problems of poor phase conductivity, expensive equipment, harsh process conditions, etc., and achieve an increase in the magnitude of resistance mutation. , The effect of infrared light regulation range improvement and excellent electrical conductivity

Active Publication Date: 2014-12-24
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

Although this vanadium dioxide film can undergo a phase transition under the action of an external electric field, it also has shortcomings. First, the electric field is directly applied to the vanadium dioxide film to produce a Joule heat-induced phase transition. Vanadium i

Method used

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  • Silver nanowire and M-phase vanadium dioxide nanoparticle composite film and preparation method thereof
  • Silver nanowire and M-phase vanadium dioxide nanoparticle composite film and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0040] The concrete steps of preparation are:

[0041] In step 1, silver nanowires with a wire diameter of 40 nm and a wire length of 50 μm are dispersed in isopropanol to obtain a silver nanowire solution with a concentration of 0.3 wt % in isopropanol. Then the silver nanowire isopropanol solution is spin-coated (or scraped) on the substrate; wherein, the substrate is a polyethylene terephthalate substrate, and after drying, a figure 1 a shows the substrate covered with silver nanowire film.

[0042] Step 2, spin coating (or scrape coating) an organic conductive polymer material on the silver nanowire film of the substrate coated with the silver nanowire film; wherein, the organic conductive polymer material is polyaniline. Afterwards, the M-phase vanadium dioxide nanoparticles with a particle diameter of 20nm are dispersed in water (or ethanol) to obtain a concentration of 2wt% M-phase vanadium dioxide nanoparticles aqueous solution (or M-phase vanadium dioxide nanoparticl...

Embodiment 2

[0044] The concrete steps of preparation are:

[0045] In step 1, silver nanowires with a wire diameter of 55 nm and a wire length of 63 μm were dispersed in isopropanol to obtain a silver nanowire isopropanol solution with a concentration of 0.6 wt%. Then the silver nanowire isopropanol solution is spin-coated (or scraped) on the substrate; wherein, the substrate is a polyethylene terephthalate substrate, and after drying, a figure 1 a shows the substrate covered with silver nanowire film.

[0046] Step 2, spin coating (or scrape coating) an organic conductive polymer material on the silver nanowire film of the substrate coated with the silver nanowire film; wherein, the organic conductive polymer material is polyaniline. Afterwards, the M phase vanadium dioxide nanoparticles with a particle diameter of 40nm are dispersed in water (or ethanol) to obtain a concentration of 3wt% M phase vanadium dioxide nanoparticles aqueous solution (or M phase vanadium dioxide nanoparticles ...

Embodiment 3

[0048] The concrete steps of preparation are:

[0049] In step 1, silver nanowires with a wire diameter of 70 nm and a wire length of 75 μm were dispersed in isopropanol to obtain a silver nanowire solution with a concentration of 0.9 wt % in isopropanol. Then the silver nanowire isopropanol solution is spin-coated (or scraped) on the substrate; wherein, the substrate is a polyethylene terephthalate substrate, and after drying, the following figure 1 a shows the substrate covered with silver nanowire film.

[0050] Step 2, spin coating (or scrape coating) an organic conductive polymer material on the silver nanowire film of the substrate coated with the silver nanowire film; wherein, the organic conductive polymer material is polyaniline. Afterwards, the M-phase vanadium dioxide nanoparticles with a particle diameter of 60nm are dispersed in water (or ethanol) to obtain a concentration of 3.5wt% M-phase vanadium dioxide nanoparticles aqueous solution (or M-phase vanadium diox...

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Abstract

The invention discloses a silver nanowire and M-phase vanadium dioxide nanoparticle composite film and a preparation method thereof. The film is prepared from silver nanowire film with the film thickness of 80-120 nm and an M-phase vanadium dioxide nanoparticle film with the film thickness of 100-1000 nm, which are sequentially coated on a substrate, wherein the linear diameter of the silver nanowire for forming the silver nanowire film is 40-100 nm, and the wire length is 50-100 microns; the particle size of the M-phase vanadium dioxide nanoparticle for forming the M-phase vanadium dioxide nanoparticle film is 20-100 nm. The preparation method comprises the following steps: spin coating or blade coating the substrate with silver nanowire isopropanol solution with the concentration of 0.3-1.5 wt%, drying the substrate, spin coating or blade coating the substrate coated with the silver nanowire film with M-phase vanadium dioxide nanoparticle aqueous solution with the concentration of 2-5 wt% or ethanol solution, and at last preparing the target product. The silver nanowire and M-phase vanadium dioxide nanoparticle composite film is low in phase transformation voltage; the preparation method is convenient and low in cost; the composite film can be widely applied to the fields such as energy-saving windows, gas sensors, optoelectronic switches, thermistors, infrared remote sensing receivers and uncooled focal plane radiation detectors.

Description

technical field [0001] The invention relates to a composite film and a preparation method thereof, in particular to a silver nanowire-M phase vanadium dioxide nanoparticle composite film and a preparation method thereof. Background technique [0002] Among many thermally induced phase change materials, vanadium dioxide (VO 2 ) is a research hotspot. VO 2 Low temperature monoclinic phase VO will occur around 68°C 2 (M) and high temperature rutile phase VO 2 Reversible structural phase transition between (R). With the phase transition, VO 2 The resistivity and infrared light transmittance will change abruptly. Taking advantage of its phase transition, VO 2 It has potential application prospects in the fields of energy-saving windows, gas sensors, photoelectric switches, thermistors, infrared remote sensing receivers and uncooled focal plane radiation detectors. [0003] At present, in order to realize the VO 2 The controllable phase transition has made unremitting eff...

Claims

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Application Information

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IPC IPC(8): B32B15/04B32B15/16B32B9/04B82Y40/00B82Y30/00B05D7/24
Inventor 李明潘静吴昊钟莉王强李广海
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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