CN103981566B - A kind of self-assembly preparation method thereof of spheroid shape photonic crystal - Google Patents
A kind of self-assembly preparation method thereof of spheroid shape photonic crystal Download PDFInfo
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- CN103981566B CN103981566B CN201410227016.6A CN201410227016A CN103981566B CN 103981566 B CN103981566 B CN 103981566B CN 201410227016 A CN201410227016 A CN 201410227016A CN 103981566 B CN103981566 B CN 103981566B
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Abstract
The invention discloses the self-assembly preparation method thereof of a kind of spheroid shape photonic crystal.It is by magnetic γ Fe2O3/SiO2The ethanol solution of spheroid shape colloidal solid vertically drips the surface at the substrate being placed in the middle of two blocks of Magnet, treats that alcohol solvent all volatilizees, and assembling terminates, i.e. self assembly obtains the spheroid shape photonic crystal of the present invention.The self-assembling method built-up time of the present invention is as short as 1 ~ 2 hour, solvent volatilization terminates to complete self assembling process, prepare units of product relative to the sample size required for preparation method of the prior art is 1,/10 1/20 simultaneously, the equipment of the present invention is simple simultaneously, is greatly enhanced production efficiency and reduces production cost.
Description
Technical field
The invention belongs to photonic crystal preparing technical field, be specifically related to the self-assembly preparation method thereof of a kind of spheroid shape photonic crystal.
Background technology
Along with the development of science and technology, photonic crystal because of its light potentiation, light modulation, the excellent properties such as fiber waveguide and light amplification, more and more extensive in the application of optical field.Such as, for Toxic or the detection of pollutant, by photon crystal structure, its optical detector signal is amplified, just the determinand that content is lower can be detected, thus improve the application of optical signalling detection, and this performance depends primarily on the photon band gap feature of photonic crystal, prepare and there is the photonic crystal of complete photonic band gap can improve its performance.
The spheroid shape photonic crystal proposing in theory to construct at present is likely to be of complete photonic band gap.The preparation method of this kind of photonic crystal is little, wherein mechanical stretching method and high energy ion irradiation are colloid and construct district's deformation method, polystyrene photon crystal is carried out original position mechanical stretching or by high-octane ion beam, silicon dioxide photonic crystal is carried out irradiation, ultimately form spheroid shape photonic crystal, but the photonic crystal that both approaches is prepared, the inconsistent deformation of film is easily caused to destroy it periodically, so its order degree declines in preparation process.
Chinese Academy of Sciences's chemistry Song Kai research group use blown film extrusion processes prepare structure comparison uniform spheroid shape colloidal crystal.They first use Monodisperse Polystyrene Microspheres to construct the colloidal crystal forming three-dimensional order, are then placed on the one side that buchner funnel opens wide, and add the polyvinyl alcohol of a certain amount of concentration in funnel, and at room temperature solidification forms PS/PVA composite membrane.Funnel lower end is connected with booster water pump, film is completely immersed in the silicone oil bath of 120 DEG C, on initial planar film, a bubble is blown out with pump, air in this bubble causes a uniform two dimension tension force to control deformation of ball, just spheroid shape photonic crystal is formed, this process employs the yielding feature of PS microsphere, but the influence factor of the method is the most, operation is difficult to control to.
Subsequently, Song Kai research group has prepared monodispersity preferable magnetic γ-Fe2O3/SiO2 spheroid shape colloidal solid, utilize externally-applied magnetic field to control the axial orientation of spheroid shape granule, assembled by vertical deposition self-assembly method and obtain ellipsoid primitive three-D photon crystal, and order is higher.The method breaches the deficiency of ellipsoidal particle disordered orientation in assembling process, control to be addressed by magnetic field, but the cycle of vertical deposition self-assembling method is longer, it is generally required to the time of 3 ~ 4 days even one week, and the amount of the magnetic γ-Fe2O3/SiO2 spheroid shape colloidal solid required for preparation units of product is relatively big, which results in and substantially increase preparation cost.Then, the present invention proposes a kind of assemble method to improve production efficiency, reduces cost.
The present invention still uses monodispersity preferable magnetic γ-Fe2O3/SiO2 spheroid shape colloidal solid for constructing primitive, induced by magnetic field liquid-vapor interface construction from part is used to prepare spheroid shape photonic crystal, the self-assembling method built-up time of the present invention is as short as 1 ~ 2 hour, solvent volatilization terminates to complete self assembling process, prepare units of product relative to the sample size required for preparation method of the prior art is 1/10-1/20 simultaneously, the equipment of the present invention is simple simultaneously, is greatly enhanced production efficiency and reduces production cost.
Summary of the invention
The technical problem to be solved in the present invention is: there is assembling cycle in the preparation method of spheroid shape photonic crystal of the prior art long, and sample consumption is big, the defect that cost is high；The present invention is to solve above-mentioned technical problem, it is provided that the self-assembly preparation method thereof of a kind of spheroid shape photonic crystal.
The self-assembly preparation method thereof of a kind of spheroid shape photonic crystal, is specifically realized by the following steps:
(1) substrate is carried out ultrasonic cleaning 15-20min with acetone, methanol and ultra-pure water respectively, use V concentrated sulphuric acid the most again: the Piranha washing liquid of V hydrogen peroxide=2:1 soaks 20-30min, is finally putting in 40 DEG C of baking ovens drying；
(2) two blocks of Magnet are vertically fixed on one and do not have in magnetic platform, then substrate is placed on the middle of two blocks of Magnet and ensures that substrate is vertical with Magnet；
(3) preparing magnetic γ-Fe2O3/SiO2 spheroid shape colloidal solid, described colloidal solid width is 200-500nm, and length-width ratio is 1-1.8, standard deviation 10%；
(4) being scattered in alcohol solvent by the magnetic γ-Fe2O3/SiO2 spheroid shape colloidal solid prepared, be configured to colloidal solid solution, its concentration is 0.04-0.08g/ml；
(5) taking 50-100 μ L colloidal solid solution, vertical dropping, on the surface of the substrate being placed in the middle of two blocks of Magnet, treats that alcohol solvent all volatilizees, and assembling terminates.
Preferably, described substrate is glass substrate, a size of 35 mm × 10 mm × 1mm.
Preferably, described Magnet is ndfeb magnet, a size of 50 mm × 50 mm × 10mm.
The present invention uses monodispersity preferable magnetic γ-Fe2O3/SiO2 spheroid shape colloidal solid for constructing primitive, uses induced by magnetic field liquid-vapor interface construction from part to prepare spheroid shape photonic crystal innovatively.The self-assembling method built-up time of the present invention is as short as 1 ~ 2 hour, solvent volatilization terminates to complete self assembling process, prepare units of product relative to the sample size required for preparation method of the prior art is 1/10-1/20 simultaneously, the equipment of the present invention is simple simultaneously, is greatly enhanced production efficiency and reduces production cost.
Accompanying drawing explanation
Fig. 1 is the scanning electron microscope of the spheroid shape photonic crystal prepared in the present invention, amplifies 2w times；
Fig. 2 is the scanning electron microscope of the spheroid shape photonic crystal prepared in the present invention, amplifies 5w times；
Fig. 3 is the scanning electron microscope of the spheroid shape photonic crystal prepared in the present invention, amplifies 10w times.
Detailed description of the invention
Below in conjunction with the accompanying drawings and the present invention is described in further details by embodiment.
Seeing Figure of description 1-3, upper it can be clearly seen that the spheroid shape photon crystal structure using the self-assembling method of the present invention to prepare is evenly distributed by figure, three-dimensional order is the highest.
Embodiment one:
The self-assembly preparation method thereof of a kind of spheroid shape photonic crystal, is specifically realized by the following steps:
(1) glass substrate of a size of 35 mm × 10 mm × 1mm is carried out ultrasonic cleaning 15-20min with acetone, methanol and ultra-pure water respectively, use V concentrated sulphuric acid the most again: the Piranha washing liquid of V hydrogen peroxide=2:1 soaks 20min, is finally putting in 40 DEG C of baking ovens drying；
(2) a size of 50 mm × 50 mm × 10mm two pieces ndfeb magnet is vertically fixed on one and does not has in magnetic platform, then substrate is placed on the middle of two blocks of Magnet and ensures that substrate is vertical with Magnet；
(3) preparing magnetic γ-Fe2O3/SiO2 spheroid shape colloidal solid, described colloidal solid width is 200nm, and length-width ratio is 1.2, standard deviation 10%；
(4) being scattered in alcohol solvent by the magnetic γ-Fe2O3/SiO2 spheroid shape colloidal solid prepared, be configured to colloidal solid solution, its concentration is 0.04g/ml；
(5) taking 50 μ L colloidal solid solution, vertical dropping, on the surface of the substrate being placed in the middle of two blocks of Magnet, treats that alcohol solvent all volatilizees, and assembling terminates.
Embodiment two:
The self-assembly preparation method thereof of a kind of spheroid shape photonic crystal, is specifically realized by the following steps:
(1) glass substrate of a size of 35 mm × 10 mm × 1mm is carried out ultrasonic cleaning 15-20min with acetone, methanol and ultra-pure water respectively, use V concentrated sulphuric acid the most again: the Piranha washing liquid of V hydrogen peroxide=2:1 soaks 30min, is finally putting in 40 DEG C of baking ovens drying；
(2) a size of 50 mm × 50 mm × 10mm two pieces ndfeb magnet is vertically fixed on one and does not has in magnetic platform, then substrate is placed on the middle of two blocks of Magnet and ensures that substrate is vertical with Magnet；
(3) preparing magnetic γ-Fe2O3/SiO2 spheroid shape colloidal solid, described colloidal solid width is 500nm, and length-width ratio is 1.8, standard deviation 10%；
(4) being scattered in alcohol solvent by the magnetic γ-Fe2O3/SiO2 spheroid shape colloidal solid prepared, be configured to colloidal solid solution, its concentration is 0.08g/ml；
(5) taking 100 μ L colloidal solid solution, vertical dropping, on the surface of the substrate being placed in the middle of two blocks of Magnet, treats that alcohol solvent all volatilizees, and assembling terminates.
Claims (2)
1. a self-assembly preparation method thereof for spheroid shape photonic crystal, comprises the following steps:
(1) substrate is carried out ultrasonic cleaning 15-20min with acetone, methanol and ultra-pure water respectively, use V the most againConcentrated sulphuric acid: VHydrogen peroxideThe Piranha washing liquid of=2:1 soaks 20-30min, is finally putting in 40 DEG C of baking ovens drying；
(2) two blocks of Magnet are vertically fixed on one and do not have in magnetic platform, then substrate is placed on the middle of two blocks of Magnet and ensures that substrate is vertical with Magnet；
(3) magnetic γ-Fe is prepared2O3/SiO2Spheroid shape colloidal solid, described colloidal solid width is 200-500nm, and length-width ratio is 1-1.8, standard deviation 10%；
(4) the magnetic γ-Fe that will prepare2O3/SiO2Spheroid shape colloidal solid is scattered in alcohol solvent, is configured to colloidal solid solution, and its concentration is 0.04-0.08g/mL；
(5) taking 50-100 μ L colloidal solid solution, vertical dropping, on the surface of the substrate being placed in the middle of two blocks of Magnet, treats that alcohol solvent all volatilizees, and assembling terminates；
Wherein, described substrate is glass substrate, a size of 35 mm × 10 mm × 1mm.
The self-assembly preparation method thereof of spheroid shape photonic crystal the most according to claim 1, it is characterised in that: described Magnet is ndfeb magnet, a size of 50 mm × 50 mm × 10mm.
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