CN103286439B - A kind of nano-antenna building mortion based on laser cavitation and method - Google Patents
A kind of nano-antenna building mortion based on laser cavitation and method Download PDFInfo
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- CN103286439B CN103286439B CN201310196240.9A CN201310196240A CN103286439B CN 103286439 B CN103286439 B CN 103286439B CN 201310196240 A CN201310196240 A CN 201310196240A CN 103286439 B CN103286439 B CN 103286439B
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Abstract
The present invention discloses a kind of nano-antenna building mortion based on laser cavitation, and described device comprises container, is located at the building mortion of described container bottom; Be marked with liquid in described container, the liquid level of described liquid is higher than the building mortion of described container bottom; The ullage of described liquid is provided with set of lenses, is provided with the laser instrument for Emission Lasers bundle above described set of lenses; Described building mortion comprises the upper die and lower die be used in conjunction with each other, the lower surface of described patrix and the upper surface of counterdie are respectively equipped with patrix shaping for the shaping nano-antenna that cooperatively interacts and counterdie shaping, connected by guide pins between described upper die and lower die, described guide pins is fixed in described counterdie, and described patrix moves up and down above described counterdie by described guide pins.In addition, the invention also discloses the method utilizing said apparatus shaping nano-antenna, described method is carried out at normal temperatures, avoids the shaping of temperature to nano-antenna, and technique is simple, and cost is low.
Description
Technical field
The present invention relates to the device and method that a kind of nano-antenna is shaped, the microjet especially utilizing laser cavitation to produce and shock wave are as the device and method of power source shaping nano-antenna.
Background technology
Since hertz and Marconi invention antenna, antenna importance in social life grows with each passing day, and has nowadays become indispensable gesture.Antenna is ubiquitous: family or workplace, in automobile or aircraft, in the confined space of boats and ships, satellite and spacecraft, even can be carried with by pedestrian.The basic function of antenna is radio wave by high frequency electric (or guided wave) energy conversion sent here by emitter (or transmission line) and delivers to space, at receiving terminal, then the radio wave energy that space is transmitted is changed into high frequency electric (or guided wave) energy transmitted to receiver.Therefore, antenna can think the converting means of guided wave and radiated wave, is an energy conversion device.
In order to adapt to the needs of various different purposes, people develop and design various types of antenna, for these antenna, can classify from different perspectives, such as, classify according to service band, purposes, polarization etc.If by job specification, reception antenna and transmitting antenna can be divided into.Because use occasion is different, also different to the requirement of antenna, such as transmitting antenna need consider power capacity problem, and reception antenna then needs to consider noise problem, therefore, respectively gives priority in the design.
Nanosecond science and technology are impetus that current scientific technological advance is new, and it can help us to understand Macroscopic physical phenomenon from the physical background of a darker level, and overcome the difficulty existed in macroscopic view application.In prior art, nano-antenna mainly adopts direct growth legal system standby, namely first on substrate, required figure is made with photoresist, one deck catalyst film is formed again by methods such as evaporation, sputtering or liquid depositions, then stripping photoresist, figure required for formation, recycling chemical vapour deposition (CVD) or other method are in catalyst pattern superficial growth nano-antenna.This kind of method not only complex manufacturing, cost is high, and to responsive to temperature, high temperature easily makes base material damage, and low temperature then makes form and the impaired performance of nano-antenna.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art part and provide a kind of utilize laser cavitation to produce microjet and the device of shock wave shaping nano-antenna; Meanwhile, present invention also offers the method adopting described device to carry out nano-antenna shaping, described method is carried out at normal temperatures, and technique is simple, and cost is lower.
For achieving the above object, the technical scheme that the present invention takes is: a kind of nano-antenna building mortion based on laser cavitation, and described device comprises container, is located at the building mortion of described container bottom;
Be marked with liquid in described container, the liquid level of described liquid is higher than the building mortion of described container bottom;
The ullage of described liquid is provided with set of lenses, is provided with the laser instrument for Emission Lasers bundle above described set of lenses;
Described building mortion comprises the upper die and lower die be used in conjunction with each other, the lower surface of described patrix and the upper surface of counterdie are respectively equipped with patrix shaping for the shaping nano-antenna that cooperatively interacts and counterdie shaping, connected by guide pins between described upper die and lower die, described guide pins is fixed in described counterdie, and described patrix moves up and down above described counterdie by described guide pins.
When under high power laser light radiation, when the energy density of laser exceedes the breakdown threshold of liquid, liquid medium by " light punctures ", can produce the plasma of HTHP in breakdown area.Plasma expands, and form the shock wave propagated with supersonic speed, the generation of simultaneous cavitation bubble, is laser cavitation bubble.Cavitation bubble externally expands under the effect of inside and outside differential pressure, promotes the external Radial Flow of surrounding liquid medium, when cavitation bubble is grown up after maximum radius, under ambient pressure and surface tension effects, sharply compress and close, the energy of closed abrupt release, again with the form of shock wave to external radiation.
When the present invention's device described above uses, nanometer wire rod is placed between patrix shaping and counterdie shaping, by guide pins, upper die and lower die alignment is installed in a reservoir.Then in container, liquid is injected, and the laser instrument opened above set of lenses, the laser beam that described laser instrument sends focuses in the liquid above patrix through set of lenses, form plasma shock wave and cavitation bubble, described cavitation bubble constantly grows, and the high-speed micro-jet being formed and point to patrix of finally crumbling and fall, and produce microshock simultaneously.Described patrix moves along guide pins to the direction of counterdie under acting on while plasma shock wave, high-speed micro-jet and microshock, nanometer wire rod between patrix shaping and counterdie shaping is deformed, the nano-antenna of final formation design shape, realizes the shaping of nano-antenna.In described building mortion, guide pins arranges on the one hand for the alignment of upper die and lower die before laser cavitation, be used on the other hand in laser cavitation process, when patrix moves to counterdie direction under the acting in conjunction of plasma stock wave, high-speed micro-jet and microshock, patrix is moved to counterdie direction along guide pins, avoids the off normal etc. of patrix.
The present invention is based on laser cavitation nano-antenna building mortion, be a kind of utilize induced with laser cavitation to produce microjet and shock wave as the device of power source shaping nano-antenna, described apparatus structure is simple, can fast for the shaping of nano-antenna, not only cost is low, and can carry out at normal temperatures, avoid the form of temperature on nano-antenna and the impact of performance.
As the preferred embodiment based on laser cavitation nano-antenna building mortion of the present invention, the liquid be marked with in described container is water or high viscosity working solution.As the more preferably embodiment based on laser cavitation nano-antenna building mortion of the present invention, described high viscosity working solution is emulsion.Described high viscosity working solution preferably but be not limited to emulsion, as long as laser cavitation described above can be realized, in practice, can liquid that according to circumstances choice for use is suitable.
As the preferred embodiment based on laser cavitation nano-antenna building mortion of the present invention, in described building mortion, guide pins is vertical tubular structure, the lower vertical of described guide pins is fixed in the counterdie of described building mortion, and the upper vertical of described guide pins penetrates in the patrix of described building mortion.As the more preferably embodiment based on laser cavitation nano-antenna building mortion of the present invention, the cross section of described guide pins is circular or polygon.As long as described guide pins can realize the alignment of upper die and lower die before laser cavitation, and in laser cavitation process, patrix is at plasma stock wave, when moving to counterdie direction under the acting in conjunction of high-speed micro-jet and microshock, patrix is moved along guide pins to counterdie direction, therefore, described guide pins can be designed to vertical tubular structure, described tubular structure can be solid or hollow, the bottom of described guide pins can be vertically fixed in described counterdie, and patrix can be arranged corresponding hole, upper vertical for described guide pins penetrates in described patrix, patrix is played to the effect of positioned in alignment.The cross section of described guide pins can be circle or polygon, can conical tubular structure, triangle tubular structure, square tubular structure, rhombus tubular structure etc.Described guide pins arrange one, two or three and more than, preferably, described guide pins arranges two, and can ensure its accuracy to the positioned in alignment effect of patrix and counterdie like this, the structure being convenient to again device of the present invention simplifies.
In addition, present invention also offers a kind of utilization as mentioned above based on the method for the nano-antenna building mortion shaping nano-antenna of laser cavitation, said method comprising the steps of:
(1) according to the shape of nano-antenna, the surface texture of the upper die and lower die of described building mortion is designed;
(2) nanometer wire rod is placed between described patrix shaping and counterdie shaping, by guide pins, upper die and lower die alignment is installed in a reservoir;
(3) in container, inject liquid, the liquid level of liquid is higher than building mortion;
(4) laser instrument is given off laser beam, laser beam focuses in the liquid above described patrix through set of lenses, and above patrix, form plasma shock wave and cavitation bubble;
(5) cavitation bubble formed in step (4) grows gradually and finally crumbles and fall, and forms the high-speed micro-jet pointing to patrix, and produces microshock simultaneously;
(6) described patrix moves along guide pins to counterdie direction under acting on while plasma shock wave, high-speed micro-jet and microshock, and the nanometer wire rod between patrix shaping and counterdie shaping is out of shape, and forms the nano-antenna of design shape.
As the preferred embodiment of the method for the nano-antenna building mortion shaping nano-antenna based on laser cavitation of the present invention, described nanometer wire rod is CNT.CNT is then the richest representativeness and be one of different material of best performance in nano material.Due to the electrical properties of little, the lightweight feature of carbon nanotube by volume and uniqueness thereof, have broad application prospects with the antenna that CNT is made, as interconnected in fiber optic communication, wireless nanometer, THz and the field such as infrared detector, solar energy conversion.
As the preferred embodiment of the method for the nano-antenna building mortion shaping nano-antenna based on laser cavitation of the present invention, the liquid injected in container in described step (2) is water or high viscosity working solution.As the more preferably embodiment of the method for the nano-antenna building mortion shaping nano-antenna based on laser cavitation of the present invention, described high viscosity working solution is emulsion.
As the preferred embodiment of the method for the nano-antenna building mortion shaping nano-antenna based on laser cavitation of the present invention, in described building mortion, guide pins is vertical tubular structure, the lower vertical of described guide pins is fixed in the counterdie of described building mortion, the upper vertical of described guide pins penetrates in the patrix of described building mortion, and the cross section of described guide pins is circular or polygon.
Nano-antenna building mortion based on laser cavitation of the present invention, the microjet that induced with laser cavitation can be utilized to produce and shock wave are as power source, and shaping nano-antenna, structure is simple.The method of the nano-antenna building mortion shaping nano-antenna based on laser cavitation of the present invention, utilize Laser Focusing in the liquid in container, and form plasma shock wave and cavitation bubble in focal position, along with the growth of cavitation bubble is crumbled and fall, produce high-speed micro-jet and shock wave, under the acting in conjunction of high-speed micro-jet, shock wave and plasma shock wave, nanometer wire rod is deformed, form the nano-antenna of design shape.Compared with direct growth method of the prior art, the inventive method forms at normal temperatures, there is not the problem of temperature, and wherein said nanometer wire rod directly can choose market simultaneously, and do not need expensive nanometer wire rod Preparation equipment, cost is low.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of embodiment of the nano-antenna building mortion based on laser cavitation of the present invention.
Fig. 2 is the structural representation based on building mortion in the nano-antenna building mortion of laser cavitation shown in Fig. 1.
Use procedure schematic diagram when Fig. 3 is the nano-antenna building mortion use based on laser cavitation shown in Fig. 1 before nano-antenna shaping.
Use procedure schematic diagram when Fig. 4 is the nano-antenna building mortion use based on laser cavitation shown in Fig. 1 after nano-antenna shaping.
In figure, 10 is container, and 12 is liquid, and 20 is building mortion, and 22 is patrix, 24 is patrix shaping, and 25 is guide pins, and 26 is counterdie, and 28 is counterdie shaping, and 30 is set of lenses, 40 is laser instrument, and 42 is laser beam, and 50 is cavitation bubble, and 60 is nanometer wire rod, and 62 is nano-antenna.
Detailed description of the invention
For better the object, technical solutions and advantages of the present invention being described, below in conjunction with the drawings and specific embodiments, the invention will be further described.
A kind of nano-antenna building mortion based on laser cavitation of the present invention, as shown in figure 1 and 2, described device comprises container 10, be located at building mortion 20 bottom described container 10; Be marked with liquid 12 in described container 10, the liquid level of described liquid 12 is higher than the building mortion 20 bottom described container 10; The ullage of described liquid 12 is provided with set of lenses 30, is provided with the laser instrument 40 for Emission Lasers bundle above described set of lenses 30; Described building mortion 20 comprises the patrix 22 and counterdie 26 that are used in conjunction with each other, the lower surface of described patrix 22 and the upper surface of counterdie 26 are respectively equipped with patrix shaping 24 for the shaping nano-antenna that cooperatively interacts and counterdie shaping 28, connected by guide pins 25 between described patrix 22 and counterdie 26, described guide pins 25 is fixed in described counterdie 26, and described patrix 22 moves up and down above described counterdie 26 by described guide pins 25.
Preferably, in described container 10 inject liquid 12 be water or high viscosity working solution, described high viscosity working solution is preferably emulsion etc., and described liquid 12 is not limited thereto, as long as can laser cavitation be realized, can as required and situation select suitable liquid.
Preferably, as shown in Figure 2, in described building mortion, guide pins 25 is vertical tubular structure, and the lower vertical of described guide pins 25 is fixed in the counterdie 26 of described building mortion, and the upper vertical of described guide pins 25 penetrates in the patrix 22 of described building mortion.As long as described guide pins 25 can realize the alignment of patrix 22 and counterdie 26 before laser cavitation, and in laser cavitation process, patrix 22 is when moving to counterdie 26 direction, patrix 22 is moved along guide pins 25 to counterdie 26 direction, therefore, described guide pins 25 can be designed to vertical tubular structure, described tubular structure can be solid or hollow, the bottom of described guide pins 25 can be vertically fixed in described counterdie 26, and patrix 22 can be arranged corresponding hole, upper vertical for described guide pins 25 penetrates in described patrix 22, patrix 22 is played to the effect of positioned in alignment.The cross section of described guide pins 25 can be circle or polygon, can conical tubular structure, triangle tubular structure, square tubular structure, rhombus tubular structure etc.Described guide pins 25 can arrange one, two or three and more than, preferably, described guide pins 25 arranges two, namely as shown in Figure 2, two are symmetrical set at described counterdie 26, can ensure that it is more accurate to the positioned in alignment effect of patrix 22 and counterdie 26 like this, the structure of building mortion of the present invention can be made again simpler.
Utilize the method for the nano-antenna building mortion shaping nano-antenna based on laser cavitation of the present invention, comprise the following steps:
(1) according to the shape of nano-antenna, the surface texture of the upper die and lower die of described building mortion is designed;
(2) nanometer wire rod is placed between described patrix shaping and counterdie shaping, by guide pins, upper die and lower die alignment is installed in a reservoir;
(3) in container, inject liquid, the liquid level of liquid is higher than building mortion;
(4) laser instrument is given off laser beam, laser beam focuses in the liquid above described patrix through set of lenses, and above patrix, form plasma shock wave and cavitation bubble;
(5) cavitation bubble formed in step (4) grows gradually and finally crumbles and fall, and forms the high-speed micro-jet pointing to patrix, and produces microshock simultaneously;
(6) described patrix moves along guide pins to counterdie direction under acting on while plasma shock wave, high-speed micro-jet and microshock, and the nanometer wire rod between patrix shaping and counterdie shaping is out of shape, and forms the nano-antenna of design shape.
First, the shape of the nano-antenna be shaped as required, design the patrix 22 of described building mortion 20 and the surface texture of counterdie 26, be the structure of design patrix shaping 24 and counterdie shaping 28, according to the shape of nano-antenna in the present embodiment, designed patrix shaping 24 and the structure of counterdie shaping 28 are as shown in Figure 2.Then, as shown in Figure 3, nanometer wire rod 60 is placed between described patrix shaping 24 and counterdie shaping 28, by guide pins 25, patrix 22 and counterdie 26 alignment is arranged in container 10.In container 10, inject liquid 12, described liquid 12 can be the high viscosity such as water or emulsion working solution, and the liquid level of liquid 12 is higher than building mortion, to form cavitation bubble above building mortion 20 patrix 22.Finally starting laser instrument 40 makes it give off laser beam 42, as shown in Figure 4, the laser beam 42 that described laser instrument 40 sends focuses in the liquid 12 above described patrix 22 through set of lenses 30, and above patrix 22, form plasma shock wave and cavitation bubble 50, the cavitation bubble 50 formed grows gradually and finally crumbles and fall, form the high-speed micro-jet pointing to patrix 22, and produce microshock simultaneously, make described patrix 22 at plasma shock wave described above, move along guide pins 25 to counterdie 26 direction under effect while high-speed micro-jet and microshock, in the process that described patrix 22 moves along described guide pins 25 to counterdie 26 direction, nanometer wire rod 60 between patrix shaping 24 and counterdie shaping 28 is out of shape gradually, the nano-antenna 62 of final formation design shape.
Preferably, nanometer wire rod of the present invention is CNT.CNT can think the body of seamless, the hollow that the graphene sheet layer that formed by carbon atom is curling, and its two ends are opening or closed, generally can be divided into SWCN and multi-walled carbon nano-tubes.CNT has excellent mechanical property and very large draw ratio, and it is the richest representativeness and be one of different material of best performance in nano material.Due to the electrical properties of little, the lightweight feature of carbon nanotube by volume and uniqueness thereof, have broad application prospects with the antenna that CNT is made, as interconnected in fiber optic communication, wireless nanometer, THz and the field such as infrared detector, solar energy conversion.
The present invention's nanometer wire rod used directly can choose the existing nanometer wire rod in market, and do not need expensive nanometer wire rod Preparation equipment, cost is low.
Employing described above is carried out at normal temperatures based on the process of the nano-antenna building mortion shaping nano-antenna of laser cavitation, compared with direct growth method of the prior art, the method of the invention does not need high temperature, avoid the damage that high temperature causes base material, it also avoid low temperature weakening nano-antenna form and performance, production technology is simple, and saves cost.
Finally to should be noted that; above embodiment is only in order to illustrate technical scheme of the present invention but not limiting the scope of the invention; although be explained in detail the present invention with reference to preferred embodiment; those of ordinary skill in the art is to be understood that; can modify to technical scheme of the present invention or equivalent replacement, and not depart from essence and the scope of technical solution of the present invention.
Claims (7)
1. based on a nano-antenna building mortion for laser cavitation, it is characterized in that, described device comprises container, is located at the building mortion of described container bottom;
Be marked with liquid in described container, the liquid level of described liquid is higher than the building mortion of described container bottom;
The ullage of described liquid is provided with set of lenses, is provided with the laser instrument for Emission Lasers bundle above described set of lenses;
Described building mortion comprises the upper die and lower die be used in conjunction with each other, the lower surface of described patrix and the upper surface of counterdie are respectively equipped with patrix shaping for the shaping nano-antenna that cooperatively interacts and counterdie shaping, connected by guide pins between described upper die and lower die, described guide pins is fixed in described counterdie, and described patrix moves up and down above described counterdie by described guide pins;
In described building mortion, guide pins is vertical tubular structure, and the lower vertical of described guide pins is fixed in the counterdie of described building mortion, and the upper vertical of described guide pins penetrates in the patrix of described building mortion;
The liquid be marked with in described container is water or high viscosity working solution.
2., as claimed in claim 1 based on the nano-antenna building mortion of laser cavitation, it is characterized in that, described high viscosity working solution is emulsion.
3. as claimed in claim 1 based on the nano-antenna building mortion of laser cavitation, it is characterized in that, the cross section of described guide pins is circular or polygon.
4. utilize as claimed in claim 1 based on a method for the nano-antenna building mortion shaping nano-antenna of laser cavitation, it is characterized in that, comprise the following steps:
(1) according to the shape of nano-antenna, the surface texture of the upper die and lower die of described building mortion is designed;
(2) nanometer wire rod is placed between described patrix shaping and counterdie shaping, by guide pins, upper die and lower die alignment is installed in a reservoir;
(3) in container, inject liquid, the liquid level of liquid is higher than building mortion;
(4) laser instrument is given off laser beam, laser beam focuses in the liquid above described patrix through set of lenses, and above patrix, form plasma shock wave and cavitation bubble;
(5) cavitation bubble formed in step (4) grows gradually and finally crumbles and fall, and forms the high-speed micro-jet pointing to patrix, and produces microshock simultaneously;
(6) described patrix moves along guide pins to counterdie direction under acting on while plasma shock wave, high-speed micro-jet and microshock, and the nanometer wire rod between patrix shaping and counterdie shaping is out of shape, and forms the nano-antenna of design shape.
5., as claimed in claim 4 based on the method for the nano-antenna building mortion shaping nano-antenna of laser cavitation, it is characterized in that, described nanometer wire rod is CNT.
6., as claimed in claim 4 based on the method for the nano-antenna building mortion shaping nano-antenna of laser cavitation, it is characterized in that, described high viscosity working solution is emulsion.
7. as claimed in claim 4 based on the method for the nano-antenna building mortion shaping nano-antenna of laser cavitation, it is characterized in that, in described building mortion, guide pins is vertical tubular structure, the lower vertical of described guide pins is fixed in the counterdie of described building mortion, the upper vertical of described guide pins penetrates in the patrix of described building mortion, and the cross section of described guide pins is circular or polygon.
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| CN103712723B (en) * | 2013-12-19 | 2016-04-06 | 江苏大学 | The detection method of laser cavitation jet flow force percussive action and device |
| CN103920884B (en) * | 2014-04-25 | 2016-04-20 | 广东工业大学 | A kind of nano particle preparation facilities based on induced with laser cavitation and method |
| CN107984086B (en) * | 2017-11-28 | 2019-12-31 | 江苏大学 | Method for manufacturing ultramicro group holes based on laser-induced cavitation collapse water jet |
| CN110091654A (en) * | 2019-05-14 | 2019-08-06 | 广东工业大学 | A kind of induced with laser cavitation micro-embossing device |
| CN110369596B (en) * | 2019-06-20 | 2021-05-18 | 广东工业大学 | Bending device based on laser-induced cavitation effect and bending method thereof |
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