CN104693459A - Method for removing magnetic fluid from three-dimensional periodic structure of non-magnetic ellipsoid colloidal particles regulated and controlled by external magnetic field - Google Patents
Method for removing magnetic fluid from three-dimensional periodic structure of non-magnetic ellipsoid colloidal particles regulated and controlled by external magnetic field Download PDFInfo
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Abstract
The invention relates to a method for removing magnetic fluid from a three-dimensional periodic structure of non-magnetic ellipsoid colloidal particles regulated and controlled by an external magnetic field. The method comprises the steps of putting the three-dimensional periodic structure of the non-magnetic ellipsoid colloidal particles in a high pressure box, controlling the magnetic field intensity by virtue of electrifying coils respectively arranged at the left and right ends of a glass substrate to which the three-dimensional periodic structure is attached, supplying water vapor from one side, along the horizontal direction, of the three-dimensional periodic structure; slowly immersing the water vapor into magnetic fluid, and enabling the magnetic fluid to flow out together with water under a gradually increased magnetic field force. The method has the technical effects that the magnetic fluid in the three-dimensional periodic structure of the prepared non-magnetic ellipsoid colloidal particles can be effectively and completely removed without influencing the three-dimensional periodic structure.
Description
Technical field
The present invention relates to a kind of method removing magnetic fluid, particularly relate to a kind of method removing magnetic fluid in three-dimensional periodic structure of non-magnetic ellipsoid colloidal particle via external magnetic field control.
Background technology
Three-dimensional periodic structure is a kind of artificial space periodic structure, freely handling and controlling photon is realized because its band gap effect and defect effect can be utilized, be with a wide range of applications in many fields such as quantum information process, optical information processing and bio-sensings, be the focus of research in recent years always.The preparation method of three-dimensional periodic structure is a lot, as precision processing technology, semiconductor fabrication, colloidal self-assembly method, template and laser fabrication technology etc., and self-assembly method is considered to prepare the most effective means of near infrared, optics and more short-wave band three-dimensional periodic structure.Self-assembling method mainly comprises vertical deposition self-assembly method, gravity self-assembly method, centrifugal self-assembly method and substrate crystal pulling method self-assembly method etc.Wherein, vertical deposition self-assembly method is the several important parameter such as size, vaporization temperature, pressure by controlling colloidal solid, obtain the three-dimensional periodic structure that thickness is controlled, its Processes and apparatus is simple, and the sample of built-up time short (generally several hours), preparation is large-area ordered and defect is less.Therefore, in order to obtain the three-dimensional periodic structure of large area structure high-sequential within a short period of time, vertical deposition self-assembly method becomes scientific research person in recent years and carries out one of prefered method prepared by globosity primitive three-dimensional periodic structure.
Contriver disclosed a kind of adopt magnetic fluid to control method that non magnetic ellipsoid colloidal solid becomes three-dimensional periodic structure in 2012, number of patent application is 2012105133528, the method is by being uniformly distributed in deionized water by magnetic fluid and non magnetic ellipsoid colloidal solid, by evaporation and the effect in magnetic field, non magnetic ellipsoid colloidal solid in magnetic fluid can rotate, become orientation consistent, final formation three-dimensional periodic structure, while formation three-dimensional periodic structure, magnetic fluid and non magnetic ellipsoid colloidal solid mix, hydrofluoric acid vapor is adopted to corrode in order to remove magnetic fluid contriver, but hydrofluoric acid to corrode the not only time long, and it is not thorough to remove magnetic fluid, because hydrofluoric acid has severe corrosive, the three-dimensional periodic structure easily formed non magnetic ellipsoid colloidal solid produces to be destroyed.
Summary of the invention
The object of the present invention is to provide a kind of method removing magnetic fluid in three-dimensional periodic structure of non-magnetic ellipsoid colloidal particle via external magnetic field control, solved and making in non magnetic ellipsoid colloidal solid three-dimensional periodic structure the problem adopting hydrofluoric acid removal magnetic fluid to produce.
The present invention is achieved like this, a kind of method removing magnetic fluid in three-dimensional periodic structure of non-magnetic ellipsoid colloidal particle via external magnetic field control, it is characterized in that: non magnetic ellipsoid colloidal solid three-dimensional periodic structure is lain in a horizontal plane in high-voltaghe compartment, hot-wire coil is respectively equipped with thus controlling magnetic field intensity at the two ends, left and right of the substrate of glass generating three-dimensional periodic structure, water vapor is passed into from three-dimensional periodic structure along the side of horizontal direction, water vapor slowly immerses in magnetic fluid through high pressure, under the magnetic field force effect increased gradually, magnetic fluid together flows out with water.
The described substrate of glass being attached with three-dimensional periodic structure lies in a horizontal plane in high-voltaghe compartment.
Described pressure is 0.5-2Mpa.
Described magnetic field force is 200-400G, and magnetic field force speedup is 10/m.
The preparation method of described non magnetic ellipsoid colloidal solid three-dimensional periodic structure is: 1) ellipsoid is placed in phial A, utilizes the ultrasonic 60min in ultrasonic pond, make ellipsoid in deionized water dispersed; 2) from phial A, take out the solution of 5ml with ellipsoid, instillation concentration is the magnetic fluid 0.017ml of 0.3%, and ultrasonic making it is uniformly distributed, and is then contained in phial B; 3) this vial B is placed in high-voltaghe compartment, the magneticstrength controlling phial B liquid level place is 210G; 4) vaporization temperature 35 DEG C, pressure is under the condition of 45mmHg, and growth 6h, the substrate of glass of vertically placing obtains the three-dimensional periodic structure of the non magnetic polystyrene ellipsoid colloidal solid being full of magnetic fluid in space; 5) load there is the substrate of glass horizontal positioned of three-dimensional periodic structure, under the effect of outside magnetic field, utilize water vapor to corrode, remove the magnetic fluid composition in three-dimensional periodic structure, the vapours attack time is 10min, obtains the three-dimensional periodic structure of the non magnetic ellipsoid colloidal solid of pure polystyrene.
Technique effect of the present invention is: effectively removed by the magnetic fluid in the non magnetic ellipsoid colloidal solid three-dimensional periodic structure prepared, and not only removes clean, and on three-dimensional periodic structure without impact.
Embodiment
A kind of method removing magnetic fluid in three-dimensional periodic structure of non-magnetic ellipsoid colloidal particle via external magnetic field control of the present invention, utilize the magnetic fluid between the ellipsoid colloidal solid in high-pressure water vapor immersion three-dimensional periodic structure, the capillary force of magnetic fluid and ellipsoid colloid is reduced, and magnetic fluid is met water and is changed semi-solid state into, then by magnetic field force by magnetic fluid from " extraction " three-dimensional periodic structure, because non magnetic ellipsoid colloidal solid three-dimensional periodic structure has thickness, by linearly increasing magnetic field force, be convenient to bottom magnetic fluid " extraction ".Realize especially by following steps: the substrate of glass being attached with non magnetic ellipsoid colloidal solid three-dimensional periodic structure is lain in a horizontal plane in high-voltaghe compartment, control pressure is 0.5Mpa, continue to pass into water vapor, magnetic fluid is by magneticaction from non magnetic ellipsoid colloidal solid three-dimensional periodic structure " extraction ", and the magnetic fluid after " extraction " can with sponging.
To achieve these goals, the following technological method of described non magnetic ellipsoid colloidal solid three-dimensional periodic structure realizes:
A method for organizing for the non magnetic ellipsoid colloidal solid three-dimensional periodic structure of foreign field regulation and control, it is characterized in that, described method comprises the following steps:
1) spherical polystyrene colloidal solid is dispersed in PVA, form colloid film, hang (the heavy 109.227g-118.782g of hanger) after stretching, by soluble in water for colloid film, add heat extraction PVA, obtain aspect ratio (1.3,1.7,1.9 3 kind) uniform non magnetic ellipsoid colloidal solid.
2) non magnetic colloidal solid is distributed to (magnetic fluid of 0.017ml and the deionized water of 5ml are admixed) in the water-based magnetic fluid of dilution, ultrasonic making it is evenly distributed, then substrate of glass is vertically inserted in this solution, and the phial B of splendid attire solution is steadily put into high-voltaghe compartment.Put bar magnet at the bottom and upper segment of this phial B, this phial B is in parallel magnetic field.
3) distance of controlling magnet and phial B liquid level obtains suitable magnetic field force (210G), the vaporization temperature of 35 DEG C, under the pressure of 45mmHg, due to the evaporation of liquid and the regulating and controlling effect of foreign field, after 6h, obtain the assembling of non magnetic ellipsoid colloidal solid three-dimensional periodic structure on the glass substrate.
The present invention is described in further detail for embodiment below, should understand these embodiments and only be not used in for illustration of the present invention and limit the scope of the invention.
Embodiment 1:
The preparation of the non magnetic ellipsoid colloidal solid in present embodiment mainly utilizes polystyrene spherical particles to stretch and forms, and the size distribution of non magnetic polystyrene ellipsoid colloidal solid is relatively more even, shape is basically identical.
Embodiment 2: in present embodiment, a kind of self-assembling method of non magnetic ellipsoid colloidal solid three-dimensional periodic structure of foreign field regulation and control is mainly by being dispersed in magnetic fluid by non magnetic ellipsoid colloidal solid, under outside magnetic field regulation and control, obtained the three-dimensional periodic structure of high-sequential by vertical deposition self-assembling method.
Embodiment 3:
Present embodiment prepares the self-assembling method of the non magnetic ellipsoid colloidal solid three-dimensional periodic structure of a kind of foreign field regulation and control described in specific embodiment 2, realized by following steps: 1) ellipsoid prepared in embodiment 1 is placed in phial A, utilize the ultrasonic 60min in ultrasonic pond, make ellipsoid in deionized water dispersed; 2) from phial A, take out the solution of 5ml with ellipsoid, instillation concentration is the magnetic fluid 0.017ml of 0.3%, and is ultrasonicly uniformly distributed all the time, is then contained in phial B; 3) this vial B is placed in high-voltaghe compartment, and descends two ends respectively to place bar magnet one thereon, make it to be in uniform electric field, by the position of regulating magnet, the magneticstrength controlling phial B liquid level place is 210G; 4) vaporization temperature 35 DEG C, pressure is under the condition of 45mmHg, and growth 6h, obtains the three-dimensional periodic structure of the non magnetic polystyrene ellipsoid colloidal solid being full of magnetic fluid in space on the glass substrate.
In present embodiment, preparation technology is simple and quick, manipulative capability strong, can obtain the three-dimensional periodic structure of non magnetic ellipsoid colloidal solid.The formation of this structure all just utilizes foreign field, magnetic fluid and self-assembling method to obtain, and without the need to any other external conditions and technique, preparation technology's cost is low.
Embodiment 4:
The non magnetic ellipsoid colloidal solid three-dimensional periodic structure that present embodiment will obtain in above-described embodiment 3, water vapor is utilized to corrode, the magnetic fluid composition in three-dimensional periodic structure is removed under the effect of outside magnetic field, the vapours attack time is 10min, obtains the three-dimensional periodic structure of the non magnetic ellipsoid colloidal solid of pure polystyrene.
Claims (5)
1. remove the method for magnetic fluid in three-dimensional periodic structure of non-magnetic ellipsoid colloidal particle via external magnetic field control for one kind, it is characterized in that: non magnetic ellipsoid colloidal solid three-dimensional periodic structure is lain in a horizontal plane in high-voltaghe compartment, hot-wire coil is respectively equipped with at the left and right end of the substrate of glass being attached with three-dimensional periodic structure, thus controlling magnetic field intensity, water vapor is passed into from three-dimensional periodic structure along the side of horizontal direction, water vapor slowly immerses in magnetic fluid through high pressure, under the magnetic field force effect increased gradually, magnetic fluid together flows out with water.
2. the method for magnetic fluid in removal three-dimensional periodic structure of non-magnetic ellipsoid colloidal particle via external magnetic field control according to claim 1, it is characterized in that: outside magnetic field regulates and controls in the preparation of non magnetic ellipsoid colloidal solid three-dimensional periodic structure, and described substrate of glass is vertically placed in high-voltaghe compartment; And in removal magnetic fluid process, the substrate of glass being attached with three-dimensional periodic structure is then lie in a horizontal plane in high-voltaghe compartment.
3. the method for magnetic fluid in removal three-dimensional periodic structure of non-magnetic ellipsoid colloidal particle via external magnetic field control according to claim 1, is characterized in that: pressure is 0.5-2Mpa.
4. the method for magnetic fluid in removal three-dimensional periodic structure of non-magnetic ellipsoid colloidal particle via external magnetic field control according to claim 1, it is characterized in that: magnetic field force is 200-400G, magnetic field force speedup is 10/m.
5. according to claim 1ly regulate and control the method for magnetic fluid in non magnetic ellipsoid colloidal solid three-dimensional periodic structure except foreign field, it is characterized in that: the preparation method of described non magnetic ellipsoid colloidal solid three-dimensional periodic structure is: 1) ellipsoid is placed in phial A, utilize the ultrasonic 60min in ultrasonic pond, make ellipsoid in deionized water dispersed; 2) from phial A, take out the solution of 5ml with ellipsoid, instillation concentration is the magnetic fluid 0.017ml of 0.3%, and ultrasonic making it is uniformly distributed, then in Sheng Installed to phial B; 3) this vial B is placed in high-voltaghe compartment, the magneticstrength controlling phial B liquid level place is 210G; 4) vaporization temperature 35 DEG C, pressure is under the condition of 45mmHg, and growth 6h, the substrate of glass of vertically placing obtains the three-dimensional periodic structure of the non magnetic polystyrene ellipsoid colloidal solid being full of magnetic fluid in space; 5) substrate of glass being attached with three-dimensional periodic structure is lain in a horizontal plane in high-voltaghe compartment, under the effect of outside magnetic field, water vapor is utilized to corrode, remove the magnetic fluid composition in three-dimensional periodic structure, the vapours attack time is 10min, obtains the three-dimensional periodic structure of the non magnetic ellipsoid colloidal solid of pure polystyrene.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1358882A (en) * | 2001-11-27 | 2002-07-17 | 南京大学 | Preparation for external electric field controlled colloid particle self-composing and three-D photon crystal |
| CN1749445A (en) * | 2005-08-23 | 2006-03-22 | 南京大学 | Method for controlling colloid micro ball self assembling and preparing two-dimension and three-dimension photon crystal |
| CN102384904A (en) * | 2011-10-10 | 2012-03-21 | 上海交通大学 | Metal surface enhanced Raman scattering substrate with three-dimensional period structure and preparation method thereof |
| CN102942703A (en) * | 2012-12-05 | 2013-02-27 | 江西师范大学 | Self-assembly method of three-dimensional periodic structure of non-magnetic ellipsoid colloidal particle via external magnetic field control |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1358882A (en) * | 2001-11-27 | 2002-07-17 | 南京大学 | Preparation for external electric field controlled colloid particle self-composing and three-D photon crystal |
| CN1749445A (en) * | 2005-08-23 | 2006-03-22 | 南京大学 | Method for controlling colloid micro ball self assembling and preparing two-dimension and three-dimension photon crystal |
| CN102384904A (en) * | 2011-10-10 | 2012-03-21 | 上海交通大学 | Metal surface enhanced Raman scattering substrate with three-dimensional period structure and preparation method thereof |
| CN102942703A (en) * | 2012-12-05 | 2013-02-27 | 江西师范大学 | Self-assembly method of three-dimensional periodic structure of non-magnetic ellipsoid colloidal particle via external magnetic field control |
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