CN114726256B - Device for driving long-range motion of magnetic suspension graphene ship by utilizing laser - Google Patents
Device for driving long-range motion of magnetic suspension graphene ship by utilizing laser Download PDFInfo
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- CN114726256B CN114726256B CN202210177956.3A CN202210177956A CN114726256B CN 114726256 B CN114726256 B CN 114726256B CN 202210177956 A CN202210177956 A CN 202210177956A CN 114726256 B CN114726256 B CN 114726256B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
- H02N15/00—Holding or levitation devices using magnetic attraction or repulsion, not otherwise provided for
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B32/00—Carbon; Compounds thereof
- C01B32/15—Nano-sized carbon materials
- C01B32/182—Graphene
- C01B32/194—After-treatment
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/005—Optical devices external to the laser cavity, specially adapted for lasers, e.g. for homogenisation of the beam or for manipulating laser pulses, e.g. pulse shaping
- H01S3/0071—Beam steering, e.g. whereby a mirror outside the cavity is present to change the beam direction
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S5/00—Semiconductor lasers
- H01S5/005—Optical components external to the laser cavity, specially adapted therefor, e.g. for homogenisation or merging of the beams or for manipulating laser pulses, e.g. pulse shaping
- H01S5/0071—Optical components external to the laser cavity, specially adapted therefor, e.g. for homogenisation or merging of the beams or for manipulating laser pulses, e.g. pulse shaping for beam steering, e.g. using a mirror outside the cavity to change the beam direction
Abstract
The invention discloses a device and a method for driving a magnetic suspension graphene ship to move in a long range by utilizing laser, which belong to the technical field of light-operated solid movement. The invention has the characteristics of simple structure, easy accurate control, no contact, controllable rotation direction and speed, controllable long-range movement distance and speed, controllable movement track and the like, and can push the graphene boat to move for a long distance only by providing a light source by laser and forming a specific track and a certain vacuum degree by using the neodymium-iron-boron magnet; can be widely applied to the fields of rapid transportation, light energy conversion and the like.
Description
Technical Field
The invention belongs to the technical field of light-operated solid movement, and discloses a device and a method for driving magnetic levitation graphene boat to move along a long distance by using laser.
Background
Currently, there are many advantages to using light to manipulate objects, such as being non-touchable, remote and pollution-free. Most processes are carried out in a liquid environment. The most common way is to rely on the radiation pressure and potential energy of the light itself, such as optical tweezers and the like. However, the forces generated by the radiation pressure and potential energy are too weak to manipulate only nano-scale objects. In order to expand the dimensions of manipulation objects, another approach that has emerged in recent years is to use the energy generated by the interaction of light with the object to influence the properties of the medium and in turn to push the object, such as the photo-thermophoresis effect, where the temperature gradient is caused by the photo-thermophoresis effect of the object itself and the photo-thermophoresis effect, where the charge comes from the photo-electric effect of the object itself. One can manipulate objects on the order of micrometers by these methods. However, due to the inherent properties of liquids, it is difficult to handle larger objects on the order of centimeters and to increase the speed of the objects. Thus, researchers have begun to look for ways to manipulate objects in a gaseous environment again. The history can be traced to a kruk radiometer, which is a simple rough model. In recent years, researchers have achieved pushing down microbeads from the walls, pushing the microbeads on the substrate, pushing multiple layers of GO sheets, and the like. The spatial dimensions of objects and motions in these works are still in microns. Thus, precise manipulation of macroscopic solids on the order of centimeters with light remains a challenge. Therefore, in order to realize accurate long-range motion control of centimeter-level solids in a gas environment, development of a method which has simple structure, low cost and low equipment manufacturing difficulty and can realize control of motion speed and distance is urgently needed.
Through the above analysis, the problems and defects existing in the prior art are as follows:
(1) Existing methods for optical manipulation of objects often occur in liquid environments, with a single working environment, and these methods can only manipulate micro-scale objects and have very low manipulation speeds.
(2) The existing method for controlling the object in the gas environment by utilizing the light is limited to the micro-scale object and the ultra-short distance control, and the object length Cheng Caokong in the centimeter scale cannot be realized.
The difficulty of solving the problems and the defects is as follows: 1. conventional methods for optical manipulation of objects tend to have a single environment of action, can only manipulate micro-scale objects, and have very low manipulation speeds.
2. The existing method for controlling the object in the gas environment by utilizing the light is limited to the micro-scale object and the ultra-short distance control.
The meaning of solving the problems and the defects is as follows: 1. the light-operated object device has the advantages of very simple structure, low equipment manufacturing difficulty and low cost; 2. the device can operate objects in the centimeter level, and the operation distance is very far and can reach 100mm and above in comparison with a conventional mode.
Disclosure of Invention
Aiming at the problems existing in the prior art, the invention provides a device and a method for driving long-range movement of a magnetic suspension graphene ship by using laser.
The invention is realized in such a way that the device for driving the long-range movement of the magnetic suspension graphene ship by using the laser comprises a driving light path, a magnetic track and the graphene ship;
the driving light path is used for providing a driving light source and an adjusting light source to act on the position of the graphene ship so as to provide driving force for the movement of the graphene ship;
the magnetic track is used for stabilizing the suspended graphene boat, so as to restrict the boat to perform long-range linear motion;
the graphene ship is used for stably moving along a specific magnetic track under the action of laser.
Further, the driving light path comprises a laser and a reflecting mirror, wherein the reflecting mirror is positioned on an output light path of the laser and used for emitting laser of the laser to the sail of the graphene ship, the laser is provided with a power adjusting module, and the power adjusting module is used for adjusting the power of the laser so as to realize adjustable movement speed of the graphene ship.
Further, the light source wavelength of the laser is 420-632 nm.
Further, the power adjusting range of the power adjusting module is 0-1050 mW.
Further, the magnetic track comprises NdFeB permanent magnets, the NdFeB permanent magnets are sequentially arranged according to the opposite magnetic poles, and the magnetic track is provided with a magnetic field by a strip-shaped NdFeB magnet with the length of 100mm multiplied by 5mm multiplied by 10 mm.
Further, the size of the graphene ship body is 6mm multiplied by 8mm, the size of the sail is 6mm multiplied by 3mm, and the thickness of the graphene ship body is 50 mu m.
The invention also provides a method for driving the long-range motion of the magnetic suspension graphene ship by using the laser, which comprises the following steps:
firstly, emitting laser through a laser, enabling the laser to be parallel to be incident on a laser reflector, and enabling light beams to be horizontally incident on a graphene sail after adjustment of the two laser reflectors;
providing a specific magnetic track by using a long-strip-shaped NdFeB magnet, lightly placing a graphite boat on the track, and stably suspending the graphite boat on the magnetic track under the constraint of a magnetic field;
step three, the movement of the graphite boat is the result of the action of radiation force, and when laser acts on the sail, the momentum difference is lost due to the action of gas molecules generated by the temperature difference on two sides of the sail and the sail, so that the graphene boat is pushed to move;
step four, adjusting the movement speed of the graphene ship by adjusting the laser power, so as to realize the speed adjustment of the ship movement; the movement speed and the movement time of the graphene ship are adjusted by adjusting the laser power and the laser action time, so that the distance of ship movement is adjustable.
Further, the preparation process of the graphene ship in the second step comprises the following steps:
s101, dispersing graphene raw powder in purified water, and stirring for two hours at 65 ℃ by using a magnetic stirrer;
s102, transferring the graphene aqueous dispersion liquid into an ultrasonic device, and taking a graphene aqueous solution with a uniformly dispersed middle part after ultrasonic treatment for two hours;
s103, uniformly covering a polytetrafluoroethylene film on a glass substrate, uniformly dripping a graphene aqueous solution on the glass substrate, and putting the glass substrate into a vacuum drying oven to be dried at 80 ℃, wherein the polytetrafluoroethylene film can be easily stripped into a complete large graphene sheet due to good hydrophobicity;
s104, cutting and splicing the graphene sheets to design the graphene ship with the specific structure.
Further, the mass of the graphene ship in the second step is 10-100mg.
Further, in the fourth step, the movement distance of the graphene ship is 0-100mm.
By combining all the technical schemes, the invention has the advantages and positive effects that:
1. the device has simple structure, easy operation and low equipment manufacturing difficulty; the neodymium-iron-boron magnet has low cost and is easy to obtain. The preparation method of the graphene ship is simple, and the graphene ship can be controlled to move for a long time by only forming a magnetic track through the magnet and providing energy through laser.
2. The controllable object is not limited to a graphene ship, and can be any object with good absorbance and diamagnetism, so that the controllable object has wide application range and huge application potential.
3. The light source used in the invention has wide range, can be used for ultraviolet light, visible light, red light and near infrared light, has low power at a lower level and has lower energy requirement.
4. The invention can realize the control of light on cm-level large-scale objects, can be widely applied to different scenes and has wide application prospect.
5. The liquid drop conveying distance is very long and can easily reach 100mm or more.
6. The material, the conveying distance and the speed of the object to be controlled can be adjusted, and the device has high flexibility and good operability.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following description will briefly explain the drawings needed in the embodiments of the present application, and it is obvious that the drawings described below are only some embodiments of the present application, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a process flow diagram of a graphene ship prepared by drying a graphene aqueous solution under vacuum to obtain graphene sheets, which is provided by the embodiment of the invention.
Fig. 2 is a front view of a device for driving a magnetically levitated graphene boat to move along a long distance by using laser according to an embodiment of the present invention.
Fig. 3 is a top view of a device for driving long-range motion of a magnetically levitated graphene ship by using laser according to an embodiment of the invention.
FIG. 4 is a diagram showing the effect of a motion process with a magnetic track of 100mm according to an embodiment of the present invention.
Fig. 5 is a graph of the average velocity of graphene ship motion at different laser powers according to an embodiment of the present invention.
Fig. 6 is a graph of the instantaneous speed of the movement of the graphene ship when the laser power provided by the embodiment of the invention is 195 mW.
In the figure: 1. a laser; 2. a reflecting mirror; 3. a magnetic track; 4. and (3) a graphene ship.
Detailed Description
The present invention will be described in further detail with reference to the following examples in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
The present invention will be described in detail with reference to the accompanying drawings.
As shown in fig. 1, a process flow diagram of a graphene ship prepared by drying an aqueous graphene solution under vacuum to obtain graphene sheets includes the following steps:
s101, dispersing graphene raw powder in purified water, and stirring for two hours at 65 ℃ by using a magnetic stirrer;
s102, transferring the graphene aqueous dispersion liquid into an ultrasonic device, and taking a graphene aqueous solution with a uniformly dispersed middle part after ultrasonic treatment for two hours;
s103, uniformly covering a polytetrafluoroethylene film on a glass substrate, uniformly dripping a graphene aqueous solution on the glass substrate, and putting the glass substrate into a vacuum drying oven to be dried at 80 ℃, wherein the polytetrafluoroethylene film can be easily stripped into a complete large graphene sheet due to good hydrophobicity;
s104, cutting and splicing the graphene sheets to design the graphene ship with the specific structure.
As shown in fig. 2 and 3, the device for driving the long-range motion of the magnetic suspension graphene ship by using the laser provided by the embodiment of the invention comprises a driving light path, a magnetic track and the graphene ship.
And a droplet transport optical path: a light source is provided by a 532nm continuous laser 1, and the laser is parallel incident on a reflecting mirror 2, and the reflecting mirror horizontally incident the light beam on the sail so as to drive a graphene ship 4 to move.
The magnetic track 3 is provided with a magnetic field by a strip-shaped NdFeB magnet with the size of 100mm multiplied by 5mm multiplied by 10mm, a graphene ship is lightly placed on the magnetic track 3, the size of a ship body of the graphene ship 4 is 6mm multiplied by 8mm, the size of a sail is 6mm multiplied by 3mm, and the thickness of the sail is 50 mu m.
The method for driving the long-range motion of the magnetic suspension graphene ship by using the laser comprises the following steps of:
firstly, emitting laser through a laser, enabling the laser to be parallel to be incident on a laser reflector, and enabling light beams to be horizontally incident on a graphene sail after adjustment of the two laser reflectors;
providing a specific magnetic track by using a long-strip-shaped NdFeB magnet, lightly placing a graphite boat on the track, and stably suspending the graphite boat on the magnetic track under the constraint of a magnetic field;
step three, the movement of the graphite boat is the result of the action of radiation force, and when laser acts on the sail, the momentum difference is lost due to the action of gas molecules generated by the temperature difference on two sides of the sail and the sail, so that the graphene boat is pushed to move;
step four, adjusting the movement speed of the graphene ship by adjusting the laser power, so as to realize the speed adjustment of the ship movement; the movement speed and the movement time of the graphene ship are adjusted by adjusting the laser power and the laser action time, so that the distance of ship movement is adjustable.
The laser has excellent monochromaticity and collimation, can be focused to a micrometer-scale area, achieves very high energy density, and has no damage and no contact when used for driving the movement of the graphene ship, and is easy to control accurately in time and space.
As shown in fig. 4, the speed of the ship motion is adjustable by adjusting the laser power and the pushing force;
as shown in fig. 5 and 6, the movement speed and movement time of the graphene ship are adjusted by adjusting the laser power and the laser action time, so that the distance of the ship movement is adjustable.
The long-strip-shaped neodymium-iron-boron magnet used in the embodiment of the invention can be replaced by a long-strip-shaped magnet with longer length so as to provide a longer graphene ship moving magnetic track.
The long-strip-shaped neodymium-iron-boron magnet used in the embodiment of the invention can be replaced by a long-strip-shaped electromagnet so as to provide a magnetic track with adjustable length and magnetic field intensity.
The invention has the characteristics of simple structure, easy accurate control, no contact, controllable rotation direction and speed, controllable long-range movement distance and speed, controllable movement track and the like, only needs laser to provide a light source, and the neodymium-iron-boron magnet forms a specific track and certain vacuum degree and other conditions, so that the long-range movement of the graphene ship can be promoted, the movement can easily reach 100mm and above, and the space dimension of the movement is still in micrometers, which is remarkably superior to that of the prior art, therefore, the device of the invention can be widely applied to the fields of rapid transportation, light energy conversion and the like.
In the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front," "rear," "head," "tail," and the like are used as an orientation or positional relationship based on that shown in the drawings, merely to facilitate description of the invention and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
The foregoing is merely illustrative of specific embodiments of the present invention, and the scope of the invention is not limited thereto, but any modifications, equivalents, improvements and alternatives falling within the spirit and principles of the present invention will be apparent to those skilled in the art within the scope of the present invention.
Claims (7)
1. The device for driving the long-range motion of the magnetic suspension graphene ship by using the laser is characterized by comprising a driving light path, a magnetic track and the graphene ship;
the driving light path is used for providing a driving light source and an adjusting light source to act on the position of the graphene ship so as to provide driving force for the movement of the graphene ship;
the magnetic track is used for stabilizing the suspended graphene ship, so that the graphene ship is restrained from moving for Cheng Zhixian;
the graphene ship is used for stably moving along a specific magnetic track under the action of laser;
the driving light path comprises a laser and a reflecting mirror, wherein the reflecting mirror is positioned on an output light path of the laser and is used for emitting laser of the laser to a sail of the graphene ship, the laser is provided with a power adjusting module, and the power adjusting module is used for adjusting the power of the laser so as to realize adjustable movement speed of the graphene ship;
the method for driving the long-range motion of the magnetic suspension graphene ship by using the laser comprises the following steps of:
firstly, emitting laser through a laser, enabling the laser to be parallel to be incident on a laser reflector, and enabling light beams to be horizontally incident on a graphene sail after adjustment of the two laser reflectors;
providing a specific magnetic track by using a long-strip-shaped NdFeB magnet, lightly placing the graphene ship on the track, and stably suspending the graphene ship on the magnetic track under the constraint of a magnetic field;
step three, the movement of the graphene ship is the result of the action of radiation force, and when laser acts on the sail, the momentum difference is lost due to the action of gas molecules generated by the temperature difference on two sides of the sail and the sail, so that the movement of the graphene ship is pushed;
step four, adjusting the movement speed of the graphene ship by adjusting the laser power, so as to realize the speed adjustment of the ship movement; the movement speed and the movement time of the graphene ship are adjusted by adjusting the laser power and the laser action time, so that the distance of ship movement is adjustable;
the preparation process of the graphene ship in the second step comprises the following steps:
s101, dispersing graphene raw powder in purified water, and stirring for two hours at 65 ℃ by using a magnetic stirrer;
s102, transferring the graphene aqueous dispersion liquid into an ultrasonic device, and taking a graphene aqueous solution with a uniformly dispersed middle part after ultrasonic treatment for two hours;
s103, uniformly covering a polytetrafluoroethylene film on a glass substrate, uniformly dripping a graphene aqueous solution on the glass substrate, and putting the glass substrate into a vacuum drying oven to be dried at 80 ℃, wherein the polytetrafluoroethylene film can be easily stripped into a complete large graphene sheet due to good hydrophobicity;
s104, cutting and splicing the graphene sheets to design the graphene ship with the specific structure.
2. A device for driving long-range motion of a magnetically levitated graphene ship by laser according to claim 1, wherein the light source wavelength of the laser is 420-632 nm.
3. The device for driving the long-range motion of the magnetic levitation graphene boat by using the laser according to claim 1, wherein the power adjusting range of the power adjusting module is 0-1050 mW.
4. A device for driving long-range motion of magnetically levitated graphene boat according to claim 1, wherein the magnetic track comprises neodymium-iron-boron permanent magnets, the neodymium-iron-boron permanent magnets are arranged in sequence according to opposite magnetic poles, and the magnetic track is provided with a magnetic field by a strip-shaped neodymium-iron-boron magnet with the length of 100mm×5mm×10 mm.
5. A device for driving long-range motion of magnetically levitated graphene ship according to claim 1, wherein the size of the ship body of the graphene ship is 6mm×8mm, the size of the sail is 6mm×3mm, and the thickness of the sail is 50 μm.
6. The device for driving the long-range motion of the magnetic levitation graphene boat by using the laser according to claim 1, wherein the mass of the graphene boat in the second step is 10-100mg.
7. The device for driving the long-range motion of the magnetically levitated graphene ship by using the laser according to claim 1, wherein the movement distance of the graphene ship in the fourth step is 0-100mm.
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| US9583354B2 (en) * | 2011-03-30 | 2017-02-28 | The Aerospace Corporation | Systems and methods for depositing materials on either side of a freestanding film using laser-assisted chemical vapor deposition (LA-CVD), and structures formed using same |
| CN103926686A (en) * | 2014-04-21 | 2014-07-16 | 黑龙江大学 | Femtosecond laser mode adjustable optical tweezers control device based on column vector light beam |
| WO2016011095A1 (en) * | 2014-07-17 | 2016-01-21 | Cedar Ridge Research, Llc | System for producing graphene in a magnetic field |
| CN105691636A (en) * | 2016-01-07 | 2016-06-22 | 李卓 | Spacecraft |
| CN207833755U (en) * | 2017-11-14 | 2018-09-07 | 重庆三峡学院 | A kind of magnet levitation device based on graphene |
| CN111258055B (en) * | 2020-02-12 | 2022-05-20 | 贵州民族大学 | Light-operated photoswitch |
| CN113844681A (en) * | 2021-09-01 | 2021-12-28 | 中国化学工程第三建设有限公司 | Magnetic suspension vacuum pipeline carrying system |
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