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Flexible photon nanometer chain with adjustable photonic band gap and preparation method and application thereof

A photonic band gap and photonic nanotechnology, which is applied in the field of magnetic nanomaterial preparation to shorten the diffusion distance and improve the response speed.

Active Publication Date: 2015-05-20
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a flexible photonic nanochain with an adjustable photonic bandgap and its preparation method. The photonic bandgap of the existing magnetic photonic nanochain cannot be adjusted, and it can only respond to the magnetic field but not to the magnetic field. Disadvantages of responding to other physicochemical stimuli, one-dimensional nanostructures obtained by immobilizing single chains of equidistant distances composed of monodisperse superparamagnetic nanoparticles in a responsive polymer matrix

Method used

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  • Flexible photon nanometer chain with adjustable photonic band gap and preparation method and application thereof
  • Flexible photon nanometer chain with adjustable photonic band gap and preparation method and application thereof
  • Flexible photon nanometer chain with adjustable photonic band gap and preparation method and application thereof

Examples

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Embodiment 1

[0040] (1) Disperse the superparamagnetic iron ferric oxide nanoparticles into a mixture of hydroxyethyl methacrylate (HEMA), acrylic acid (AA), cross-linking agent ethylene glycol dimethacrylate (EGDMA), photoinitiator 2 -Hydroxy-2-methyl-1-phenylacetone (HMPP), ethylene glycol and water in the solution, the concentration of HEMA monomer is 0.276mmol / ml, the concentration of AA monomer is 0.414mmol / ml, EGDMA and The concentration of HMPP is 2% of the total molar amount of HEMA and AA monomers, the concentration of superparamagnetic nanoparticles in the solution is 0.6 mg / ml, and the volume ratio of ethylene glycol and water is 5:2.

[0041] (2) Put the mixed solution under an external magnetic field of 150Gs, keep the magnetic field constant after magnetization for 1 min and irradiate with ultraviolet light, and polymerize for 5 min to prepare a flexible photonic chain. After the reaction, wash with ethanol and centrifuge for 2 to 3 times, and the final product is dispersed i...

Embodiment 2

[0044] (1) Disperse monodisperse superparamagnetic nanoparticles into a mixture of acrylamide (AM), acrylic acid (AA), crosslinking agent methylenebisacrylamide (BIS), photoinitiator 2-hydroxyl-2-methyl- 1-Phenylacetone (HMPP), diethylene glycol and water form a solution, the concentration of AM monomer is 0.207mmol / ml, the concentration of AA monomer is 0.138mmol / ml, the amount of EGDMA and HMPP is AM With 2% of the total molar amount of AA monomer, the concentration of monodisperse superparamagnetic nanoparticles is 0.6mg / ml, and the volume ratio of diethylene glycol and water is 4:3.

[0045] (2) Put the mixed solution under an external magnetic field of 150Gs, keep the magnetic field constant after magnetization for 1 min and irradiate with ultraviolet light, and polymerize for 5 min to prepare a flexible photonic chain. After the reaction, wash with ethanol and centrifuge for 2 to 3 times, and the final product is dispersed in ethanol. The scanning electron microscope im...

Embodiment 3

[0047] (1) Disperse the superparamagnetic iron ferric oxide nanoparticles into a solution composed of acrylic acid (AA), crosslinking agent methylenebisacrylamide (BIS), initiator ammonium persulfate (APS), ethylene glycol and water , the concentration of AA monomer is 0.414mmol / ml, BIS and APS are 2% of the molar weight of AA monomer, the concentration in the monodisperse superparamagnetic nanoparticle mixture is 0.6mg / ml, the volume of ethylene glycol and water The ratio is 5:2.

[0048] (2) Put the mixed solution under an external magnetic field of 150Gs, magnetize for 1min, keep the magnetic field constant, and react at 45°C for 5min to prepare a flexible photonic chain. After the reaction, wash with ethanol and centrifuge for 2 to 3 times, and the final product is dispersed in ethanol. according to Figure 8 The scanning electron microscope image of the product of this example shows that the chain structure formed by monodisperse superparamagnetic nanoparticles is fixed...

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Abstract

The invention relates to a flexible photon nanometer chain with an adjustable photonic band gap and a preparation method and application thereof. The flexible photon nanometer chain can serve as a sensor to sense the outside physical and chemical stimulation and has a single-chain one-dimensional nanometer structure formed by arranging monodisperse super-paramagnetic nanoparticles at equal particle distance in a responsive polymer matrix. The method for preparing the flexible photon nanometer chain with the adjustable photonic band gap comprises the following steps: fully dispersing the monodisperse super-paramagnetic nanoparticles in a solution containing a responsive polymer monomer, carrying out an ultraviolet or thermal induced polymerization under the action of an external magnetic field, thereby obtaining the product. Compared with the prior art, the flexible photon nanometer chain disclosed by the invention has the following main advantages that 1, the flexible photon chain is fixed in the responsive polymer; 2, the prepared flexible photon nanometer chain has the adjustable photonic band gap, the outside physical and chemical stimulation can be responsed by virtue of movement of a reflection peak, and the flexible photon nanometer chain can serve as a sensor; and 3, the diffusion distance of a detected object in a gel layer is greatly shortened and the response speed is improved.

Description

technical field [0001] The invention relates to the field of preparation of magnetic nanomaterials, in particular to a flexible photonic nanochain with an adjustable photonic bandgap and a preparation method thereof, which can be used as a sensor to sense external physical and chemical stimuli. Background technique [0002] A photonic nanochain is a chain-like structure whose dielectric properties vary periodically on a one-dimensional scale. At present, the research on the magnetic photonic nanochain based on superparamagnetic ferric oxide submicron spheres has made important research progress. German "Applied Chemistry" magazine (Angew.Chem.Int.Edit.2011, the 50th volume, page 3747) has reported a kind of silicon dioxide (SiO 2 ) A method for preparing photonic nanochains coated with superparamagnetic ferriferric oxide submicron spheres. The "Dalton Transaction" journal of the Royal Society of Chemistry (Dalton Trans.2011, the 40th volume, page 4810) magazine has reporte...

Claims

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Application Information

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IPC IPC(8): C08L33/02C08L33/26C08F220/06C08F220/28C08F222/14C08F220/56C08F222/38C08F220/54C08F2/44C08F2/48C08K3/22H01F1/36
Inventor 官建国罗巍马会茹方凯朱广浩
Owner WUHAN UNIV OF TECH
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