CN101318619A - Process for producing orientation nano-rod film with lifting and dragging technique - Google Patents
Process for producing orientation nano-rod film with lifting and dragging technique Download PDFInfo
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- CN101318619A CN101318619A CNA2008101241940A CN200810124194A CN101318619A CN 101318619 A CN101318619 A CN 101318619A CN A2008101241940 A CNA2008101241940 A CN A2008101241940A CN 200810124194 A CN200810124194 A CN 200810124194A CN 101318619 A CN101318619 A CN 101318619A
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Abstract
The invention relates to a preparation method of a nano-rod film in virtue of lifting technical orientation; the relative movement that the surface of a supporting body partially moves away from nano-rod solution is generated between the surface of the supporting body of a nano-rod material and solution containing nano-rod material by using the lifting method, the capillary force generated at a gas-liquid-solid interface is used for guiding nano-rod material in the solution to move toward the gas-liquid interface near the surface of the supporting body, and then when the surface of the supporting body moves away from nano-rod disperse solution, on the surface of the supporting body, the nano-rod material gathering at the gas-liquid-solid interface is parallel assembled with the surface of the supporting body with a mutual parallel component in virtue of the capillary force; wherein, the gas is air or the gas containing steam, the liquid is the nano-rod disperse solution, and the solid is the supporting body. The technology can simply and effectively assemble nano-rod materials and can provide the feasibility for the nano-rod materials to be applied to the sensing and optical fields.
Description
Technical field
The present invention relates to a kind of preparation method of nano rod oriented film, the nano rod material that disperses in the capillary force direct solution that produces at gas-liquid-solid interface in particularly lifting by pulling apparatus is assembled along the dip direction that leaves liquid at the gas-liquid-solid surface of solids at the interface, thereby obtains the package technique of orientation nano-rod film.This technology can be simply and assemble nanometer bar material effectively, and for its application at sensing, optical field provides may.
Background technology
Monodimension nanometer material is meant on two-dimensional direction to be that nanoscale, length are the novel nano-material of macro-scale, comprises nano wire, nano rod, nanotube, reaches nanometer band etc.This class material is owing to have peculiar physics, chemical property, for example metal is to insulator transition, superpower mechanical strength, high luminous efficiency, lower laser thresholding and Seebeck coefficient enhancing etc., and have a wide range of applications at optics, electronics, environment and medical domain, for microminiaturization, the nanometer of device provides material foundation.Wherein the nano rod material is owing to easy to prepare, pattern and performance is easy to and application extensively is subjected to showing great attention to of people.For this reason, people have developed diversified nano rod preparation methods such as vapor phase growth, liquid growth, template method etc.
At present, comprise the nano materials research of nano rod material and use in key point and the focus device that is nano material because have only nano material is applied among the device, the nano material range of application is enlarged or really move towards practicality.And the effective method of realizing nano material deviceization is exactly the assembling of nano material or compound.For the nano rod material, people are assembled into by the growth of nano rod array or with nano rod and have obtained the well behaved devices such as field-effect demonstration, sensing that comprise in the nanofiber.Yet in use still there is the problem that comprises aspects such as mechanical strength, assembling effect in present on the one hand device nano rod material, and in addition on the one hand, its some outstanding performances also fail to be used well.For example, it is the nano rod orthogonal array that there are vertical component in nano rod and supporting body surface that people can prepare colory orientations zinc-oxide nano bar array by vapor growth method, but limit its real application owing to its mechanical strength is undesirable, nano rod orientations planar the performance that comprises polarization effect that can produce then also do not developed fully.Therefore, further develop the package technique of nano rod and be applied to industrial and agricultural production, sphere of life is extremely significant.
In fact, at occurring in nature, just there is the nano rod device example of some function admirables.For example, the bone of animal is compound by hydroxyapatite nano pole and collagen nanofiber orientations, thereby has obtained high intensity and high fracture toughness.And the compound eye of some spiders is very responsive to the polarised light response by the polarization effect that orientations caused of the nano rod about 100 nanometers on its retina, and they all do not adopt the individual layer nano rod package technique vertical with assembling face.Therefore, develop some package techniques that are different from the individual layer nano rod nano-rod film vertical and just seem necessary with the assembling plane.For this reason, thereby people developed by with the nano rod material with exist the compound guiding of the surfactant material nano rod of water-wet side and hydrophobic side to be distributed in the liquid-vapor interface place, be soaked in the liquid-vapor interface place and have supporting body in the solution of nano rod-surfactant composite by vertically lifting then, and on the supporting body surface by the nano rod material at capillary force guiding liquid-vapor interface place in the supporting body surface-assembled, thereby to obtain surperficial parallel with supporting body and have the orientation nano-rod film of parallel component each other be usually said LB embrane method.Yet this method be owing to must just guide to the gas-liquid interface place with the nano rod material by means of surfactant before lifting, and must vertically lift thereby improve the preparation cost of orientation nano-rod film and limit its range of application.
For this reason, nano rod material during the present invention's proposition lifts by pulling apparatus in the capillary force direct solution that gas-liquid-solid interface produces is assembled along the dip direction that leaves liquid at the gas-liquid-solid surface of solids at the interface, thereby there is the orientation nano-rod film of parallel component in acquisition at the surface of solids and the solid surface of solids.This method is not owing to need to use the surfactant of guiding nano rod material in the assembling of gas-liquid interface place, and except vertically lifting, can also use to tilt to lift and level lifts, therefore reduce the preparation cost of nano rod oriented film, widened its scope of application.This technology will play positive facilitation for the nano rod material in the further application of optics, sensory field.
Summary of the invention
Technical problem: the purpose of this invention is to provide a kind of by lifting the preparation method of technology orientation nano-rod film, particularly by lifting the supporting body of nano rod material, make the supporting body surface assemble on the supporting body surface by the nano rod material in the capillary force direct solution at the interface, thereby acquisition solid supporting body surface is parallel with the supporting body surface and exist the nano rod of parallel component to be orientated component film at dip direction gas-liquid-solid.
Technical scheme: method of the present invention can make things convenient at an easy rate and to obtain surperficial parallel with the solid supporting body and have the nano rod oriented film of parallel component each other, is expected to be widely used in optics, demonstration, sensory field.
The present invention by the preparation method who lifts the technology orientation nano-rod film is: make generation carrier section surface between supporting body surface and the solution that includes the nano rod material of nano rod material leave the relative motion of nano rod solution by method of pulling up, and utilize nano rod material in the consequent gas-liquid-solid capillary force direct solution at the interface to the motion of the liquid-vapor interface place of supporting body near surface, when leaving the nano rod dispersion soln on the supporting body surface then, accumulate in gas-liquid-solid nano rod material at the interface and undertaken parallel on the supporting body surface by capillary force and have the assembling of parallel component each other with supporting body surface; Wherein " gas " is that " liquid " is the nano rod dispersion soln, " Gu " be supporting body.
The supporting body surface is plane or curved surface.
Quality-the volumetric concentration of nano rod material solution (promptly material is the mass number of unit with the gram in 100 ml solns) is 0.1%-20%.
Method of pulling up comprises vertically and lifts, tilts to lift and level lifts.
The velocity interval that lifts is between the little meter per second of 0.1 little meter per second-100.
Beneficial effect: parallel with supporting body surface and have the orientation nano-rod film of parallel component each other and wide application prospect is arranged and be subjected to showing great attention to of people in fields such as comprising sensing, optics, demonstration owing to can bring into play the nano rod properties of materials.But at present surperficial parallel and to have the orientation nano-rod film of parallel component each other be by surfactant the nano rod material at first to be guided to the gas-liquid interface place with supporting body, the nano rod material is assembled on the supporting body surface obtain by vertically lifting then.This method be owing to must use surfactant, and can only be by vertically lifting technology, thereby improved preparation cost, and dwindled the scope of application of this kind oriented film.
For this reason, the present invention lifts the capillary force that relative motion produced that the nano rod dispersion soln is left on process solid carrier section surface by utilization, nano rod material in the direct solution is focused at the interface gas-liquid-solid, and assemble on its surface when leaving solution on the supporting body surface, thereby obtain parallelly, and have the nano rod oriented film of parallel component each other with the supporting body surface.
Method of the present invention is not owing to need to use surfactant, and can use inclination czochralski method and horizontal czochralski method and reduced the preparation cost of film, expanded the scope of application of nano rod oriented film.This method is expected to be widely used in optics, sensory field.
Description of drawings
The preparation method of the vertical czochralski method orientation nano-rod film of Fig. 1,
The tilt preparation method of czochralski method orientation nano-rod film of Fig. 2,
The preparation method of the horizontal czochralski method orientation nano-rod film of Fig. 3.
Have among the above figure: a, lift the control device of apparatus; The mechanical driving device of b, pulling apparatus; C, solid supporting body; The direction of motion e of d, solid supporting body, display nano rod material solution vessel; E-a, nano rod material solution conduit; The liquid level of e1, nano rod material solution; The interface on e2, nano rod material solution and solid supporting body surface; The interface on e3, gas-nano rod material solution-solid supporting body surface; The nano rod material of f1, dispersion; F2, lift nano rod material that the supporting body surface that produced causes disperseing to the relative motion of liquid level to gas-liquid-solid motion at the interface; F3, lift the supporting body surface that produced and cause the nano rod material in the gas-liquid-solid assembling of carrying out at the interface with the corresponding to nano rod material of the direction of motion the relative motion of liquid level; The nano rod material of f4, assembling; The orientation of the nano rod material of g, assembling.
The specific embodiment
The present invention is further illustrated below in conjunction with embodiment.
Embodiment 1:
The preparation of the crystal seed of 1 gold medal
The softex kw (CTAB) of 5 milliliters of 0.2M is mixed with the gold chloride of 5 milliliters of 0.5mM, and add 0.6 milliliter of sodium borohydride solution that 10mM is freezing, room temperature reaction 5 hours can obtain golden crystal seed.
The preparation of 2 gold nano bars
The CTAB of 50 milliliters of 0.2M is mixed with the silver nitrate aqueous solution of 3 milliliters of 4mM and the gold chloride of 50 milliliters of 1mM.The aqueous ascorbic acid that adds 700 microlitre 0.1M then.Add 240 microlitre Jin Jings at last and plant solution to begin the gold nano bar of growing.Pass through the centrifugal removal supernatant of 12000rpm after 12 hours.After the gold nano bar disperses, remove CTAB by the centrifugal removal supernatant of 12000rpm once more in distilled water.
3 is parallel with glass bar surface and have the preparation of the gold nano bar oriented film of parallel component each other
The gold nano bar is dispersed in 0.1% the polyvinyl alcohol water solution and makes that the quality volumetric concentration of gold nano bar is 1%.Washed glass rod is soaked wherein, and vertically lift sheet glass by pulling apparatus with the speed of 1 little meter per second and leave solution.Obtain the parallel of polyvinyl alcohol bag quilt and have the gold nano bar oriented film of parallel component each other with the glass bar surface.This film can be used as the polarization optics field.
Embodiment 2:
The preparation of 1 cadmium selenide nano bar
62 milligrams of cadmium oxides and 228 milligrams of decyl phosphoric acid and 3 gram trioctylphosphine oxides under nitrogen protection 300 degrees centigrade of reactions 2 hours down.The trioctylphosphine oxide solution that with 2 gram mass volumetric concentrations is 4% selenium then injects in 290 degree fast.After 15 minutes, stop reaction.And be in 100,000 the polystyrene toluene solution with the mean molecule quantity that is dispersed in 1% after the washed with methanol 3 times, obtain the quality volumetric concentration and be the solution that 5% cadmium selenide nano bar disperses.
2 is parallel with glass surface and have the preparation of the cadmium selenide nano bar oriented film of parallel component each other
With having disperseed the quality volumetric concentration is that 1% polystyrene toluene solution of 5% cadmium selenide nano bar adds to clean glass sheet surface with 5 little meter per second horizontal movements with 1 milliliter/hour speed by syringe, obtains parallel with glass sheet surface and has the cadmium selenide nano bar oriented film of parallel component each other.This film obtains having the film of polarized fluorescence after 120 degrees centigrade of hot-pressing processing.This film can be applicable to optical field.
Embodiment 3:
The preparation of 1 polyaniline nano bar
20 milliliters of concentrated hydrochloric acids and 2 gram aniline are dispersed in 200 ml distilled waters.The mol ratio of hydrochloric acid and aniline was controlled at 6: 1.At room temperature the ammonium persulfate that adds 4.8 grams is stirred on the limit then.Subsequently, under agitation add the iron chloride of 3.75 grams again, and 30 degrees centigrade of reactions 3 hours.Subsequently, add 200 milliliters of ethanol and removing liquid (removing hydrochloric acid and ammonium persulfate) after 1 hour, surplus solution obtains the polyaniline nano bar 45 degrees centigrade of following vacuum drying.
The preparation of 2 polyaniline nano bar oriented films
The polyaniline nano bar is dispersed in the 0.1% polyacrylic acid aqueous solution, and tilts to lift immersion clean lucite sheet wherein with miter angle and obtain parallel and have the polarization film of the polyaniline nano bar of the component that is parallel to each other with the lucite surface.In ammonia, detect impedance of nano rod parallel direction and vertical direction impedance respectively at the polarization film two ends, the polyaniline nano bar oriented film changes in resistance that can cause by ammonia and detect its content.
Claims (3)
1, a kind of by lifting the preparation method of technology orientation nano-rod film, it is characterized in that making generation carrier section surface between supporting body surface and the solution that includes the nano rod material of nano rod material leave the relative motion of nano rod solution by method of pulling up, and utilize nano rod material in the consequent gas-liquid-solid capillary force direct solution at the interface to the motion of the liquid-vapor interface place of supporting body near surface, when leaving the nano rod dispersion soln on the supporting body surface then, accumulate in gas-liquid-solid nano rod material at the interface and undertaken parallel on the supporting body surface by capillary force and have the assembling of parallel component each other with supporting body surface; Wherein " gas " is air or the gas that contains steam, and " liquid " is the nano rod dispersion soln, " Gu " be supporting body.
2, according to claim 1 by lifting the preparation method of technology orientation nano-rod film, it is characterized in that the supporting body surface is plane or curved surface.
3, according to claim 1 by lifting the preparation method of technology orientation nano-rod film, it is characterized in that method of pulling up comprises vertically to lift, tilt to lift and level lifts.
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| Application Number | Priority Date | Filing Date | Title |
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| CNA2008101241940A CN101318619A (en) | 2008-06-17 | 2008-06-17 | Process for producing orientation nano-rod film with lifting and dragging technique |
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| CNA2008101241940A CN101318619A (en) | 2008-06-17 | 2008-06-17 | Process for producing orientation nano-rod film with lifting and dragging technique |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2020504339A (en) * | 2017-08-23 | 2020-02-06 | 南方科技大学Ｓｏｕｔｈ Ｕｎｉｖｅｒｓｉｔｙ Ｏｆ Ｓｃｉｅｎｃｅ Ａｎｄ Ｔｅｃｈｎｏｌｏｇｙ Ｏｆ Ｃｈｉｎａ | Manufacturing method of fluorescent polarization thin film based on quantum rod orientation |
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2008
- 2008-06-17 CN CNA2008101241940A patent/CN101318619A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2020504339A (en) * | 2017-08-23 | 2020-02-06 | 南方科技大学Ｓｏｕｔｈ Ｕｎｉｖｅｒｓｉｔｙ Ｏｆ Ｓｃｉｅｎｃｅ Ａｎｄ Ｔｅｃｈｎｏｌｏｇｙ Ｏｆ Ｃｈｉｎａ | Manufacturing method of fluorescent polarization thin film based on quantum rod orientation |
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