CN113245711B - Laser nano material processing method and processing system - Google Patents
Laser nano material processing method and processing system Download PDFInfo
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- CN113245711B CN113245711B CN202110707195.3A CN202110707195A CN113245711B CN 113245711 B CN113245711 B CN 113245711B CN 202110707195 A CN202110707195 A CN 202110707195A CN 113245711 B CN113245711 B CN 113245711B
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- 239000002086 nanomaterial Substances 0.000 title claims abstract description 22
- 238000003672 processing method Methods 0.000 title abstract description 4
- 239000007788 liquid Substances 0.000 claims abstract description 84
- 239000002356 single layer Substances 0.000 claims abstract description 30
- 238000002834 transmittance Methods 0.000 claims abstract description 20
- 238000000034 method Methods 0.000 claims abstract description 17
- 238000012544 monitoring process Methods 0.000 claims abstract description 17
- 238000001338 self-assembly Methods 0.000 claims abstract description 15
- 238000007493 shaping process Methods 0.000 claims abstract description 11
- 239000003960 organic solvent Substances 0.000 claims description 61
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 61
- 239000002105 nanoparticle Substances 0.000 claims description 50
- 239000013077 target material Substances 0.000 claims description 20
- 238000010521 absorption reaction Methods 0.000 claims description 18
- 239000000523 sample Substances 0.000 claims description 18
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 9
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 claims description 9
- 229910052737 gold Inorganic materials 0.000 claims description 9
- 238000002679 ablation Methods 0.000 claims description 8
- 230000008859 change Effects 0.000 claims description 7
- 238000000608 laser ablation Methods 0.000 claims description 7
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Natural products CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 claims description 6
- 239000010410 layer Substances 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 6
- 230000035699 permeability Effects 0.000 claims description 5
- 238000005086 pumping Methods 0.000 claims description 4
- 238000009434 installation Methods 0.000 claims description 3
- SZVJSHCCFOBDDC-UHFFFAOYSA-N iron(II,III) oxide Inorganic materials O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 claims description 3
- 229910052697 platinum Inorganic materials 0.000 claims description 3
- 239000010453 quartz Substances 0.000 claims description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 3
- 229910052709 silver Inorganic materials 0.000 claims description 3
- 125000003944 tolyl group Chemical group 0.000 claims description 3
- XLOMVQKBTHCTTD-UHFFFAOYSA-N zinc oxide Inorganic materials [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims description 3
- 230000008569 process Effects 0.000 abstract description 3
- 239000002245 particle Substances 0.000 description 21
- 239000010931 gold Substances 0.000 description 13
- 239000002082 metal nanoparticle Substances 0.000 description 7
- 229910000510 noble metal Inorganic materials 0.000 description 7
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 6
- 238000002360 preparation method Methods 0.000 description 6
- 230000009471 action Effects 0.000 description 5
- 238000003491 array Methods 0.000 description 5
- 239000000758 substrate Substances 0.000 description 4
- 239000002131 composite material Substances 0.000 description 3
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 2
- 230000002209 hydrophobic effect Effects 0.000 description 2
- 239000007791 liquid phase Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
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- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000012752 auxiliary agent Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
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- 238000013329 compounding Methods 0.000 description 1
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Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/36—Removing material
- B23K26/362—Laser etching
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/02—Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam
- B23K26/06—Shaping the laser beam, e.g. by masks or multi-focusing
- B23K26/073—Shaping the laser spot
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/12—Working by laser beam, e.g. welding, cutting or boring in a special atmosphere, e.g. in an enclosure
- B23K26/122—Working by laser beam, e.g. welding, cutting or boring in a special atmosphere, e.g. in an enclosure in a liquid, e.g. underwater
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/70—Auxiliary operations or equipment
- B23K26/702—Auxiliary equipment
Abstract
The invention relates to a laser nano material processing method and a laser nano material processing system. The processing system comprises a laser, a beam shaping module, a target module and a monitoring module, and is provided with a target holder positioned at a liquid interface, so that laser enters from the liquid interface and ablates different targets positioned in different environments; the self-assembly process of the liquid interface is indirectly monitored by using the transmittance monitoring, the accuracy is good, and the monitoring cost is low; the device and the method are suitable for preparing nano single-layer film structures with various components and can be widely applied to various scientific research laboratories.
Description
Technical Field
The invention relates to the field of nano material processing, in particular to a laser nano material processing method and a laser nano material processing system.
Background
The gold nanoparticle single-layer film is prepared by adopting an interface self-assembly method. The method overcomes the defect that a third auxiliary agent needs to be introduced in the traditional preparation of the gold nanoparticle film, the gold nanoparticle single-layer film can be obtained only by simply mixing gold sol and another hydrophobic solvent, and the number density of the gold nanoparticles in the gold film, namely the distance between the nanoparticles can be adjusted by adjusting the polarity of the hydrophobic solvent. The current methods for producing monolayer films all use chemical means and generally only produce monolayer films of a single composition.
The laser liquid phase ablation method provides a new idea for the preparation of the nano material:
the application number CN201811343344.7 is a preparation method for preparing CdS/C composite nano material by laser liquid phase ablation, wherein laser emitted by a laser is irradiated on a CdS target material through reflection, and the target material is placed in isopropanol graphene quantum dot solution. The target material is a ceramic target, the laser is a YAG Q-switched laser, and the graphene quantum dots are red light emitting graphene quantum dots. Only single-component composite nanostructures can be prepared, and the preparation process cannot be controlled.
Application number CN201711023348.2 provides a method for preparing a noble metal nanoparticle array with adjustable size, shape and material type, which comprises preparing noble metal nanoparticle arrays with different shapes and materials on a heat-conducting substrate by using a self-assembly technique. And bombarding the back of the noble metal nanoparticle array substrate by using a laser beam with high energy density as a heat source, melting and falling off the noble metal nanoparticle array from the surface of the substrate, and compounding the noble metal nanoparticle array with the surface of another group of noble metal nanoparticle arrays right below the substrate to form two-layer or multi-layer three-dimensional noble metal nanoparticle arrays. The composite alloy nanoparticle arrays with different shapes can be obtained by changing the shapes and materials of the upper and lower layers of precious metal nanoparticle arrays and adjusting parameters such as laser energy and frequency. But the device is complex and has poor stability, and no monitoring device is provided.
However, the method cannot directly obtain the nanometer single-layer film, and the subsequent single-layer film is obtained by chemical means.
Disclosure of Invention
In view of the above, to solve the above problems, a laser nanomaterial processing system is provided, which includes a laser, a beam shaping module, a target module, and a monitoring module.
The laser is a visible light laser, and after laser output by the laser enters the beam shaping module, the facula of the laser is adjusted to be 8-shaped facula; the 8-shaped light spot, namely the laser light spot, is 8-shaped, and the light intensity has two equal maximum values in the vertical direction;
the target module is provided with a liquid pool filled with liquid and a target seat, and the liquid pool is internally provided with water and another organic solvent which is not mutually dissolved with the water; two target materials with different components are arranged on the target seat, one target material is vertically arranged on the upper side of the interface of the water and the organic solvent, and the other target material is arranged on the lower side of the interface of the water and the organic solvent; the 8-shaped laser irradiates the target modules, two maximum values of the light spots are respectively irradiated on the two targets, and the nanoparticles are obtained by ablation;
the monitoring module monitors the change of the transmissivity of the water and the organic solvent, and can stop laser output and stand when the monitored transmissivity reaches a required value, so that the ablation time of the laser and the standing time after laser ablation are controlled;
when the processing system works, the laser intensities reaching the surfaces of the two target materials are different due to different absorption of the water and the organic solvent to the laser, and the self-assembly capacities of the nano particles in the water and the organic solvent are different, so that the particle size of the nano particles formed in the water is different from that of the nano particles formed in the organic solvent;
the two formed nanoparticles are self-assembled into a single-layer film at the interface of water and an organic solvent due to the interface action, the nanoparticles with large particle sizes are mutually adjacent to form the single-layer film, and the nanoparticles with small particle sizes are inserted into gaps among the nanoparticles with large particle sizes in an embedded mode.
The laser is 532nm pulse laser with pulse frequency of 5 Hz-1K Hz and power of 100-800W.
The target module comprises a mounting bracket, a liquid tank, a clamp and a target rotating seat, wherein the liquid tank and the clamp are both arranged on the mounting bracket, and the clamp is used for fixing the liquid tank; the target material rotating seat is used for fixing a target seat, and the target seat is circular; the target rotating seat can rotate around a horizontal shaft, so that the target on the target seat can be adjusted to be in a relative position with the laser beam;
the liquid pool is made of quartz material.
The monitoring module comprises two groups of magnetic absorption type light transmittance probes and a computer; the computer is connected with the magnetic absorption type light transmittance probe, the target rotating seat and the laser and is used for monitoring data of the magnetic absorption type light transmittance probe, adjusting the position of the target, controlling the switch of the laser and adjusting laser parameters of the laser;
magnetic type light transmissivity probe includes light emission head and light receiving head, and light emission head and light receiving head can install respectively on the lateral wall of liquid pool, and light emission head and light receiving head opposite face have different magnetic poles for it can lean on magnetic force to adsorb mutually on the surface in liquid pool, and can lean on magnetic force automatic alignment.
The liquid pool is formed by splicing an upper part and a lower part, and the upper part can be pulled out after the processing is finished, so that the nano structure formed at the liquid interface can be conveniently extracted.
A method for preparing a nano single-layer film by using the laser nano material processing system comprises the following steps:
step one, respectively installing two selected targets on two target installation positions of a target seat and fixing; then mounting the target holder on the target rotating holder; then, detecting the laser spot position output by the beam shaping module by using sensitive paper, and then adjusting the position of the target by using a computer to match the target with the laser spot;
injecting water and an organic solvent into the liquid pool, wherein the interface of the organic solvent and the water is positioned in the center of the target holder, so that one target is vertically arranged on the upper side of the interface of the water and the organic solvent, and the other target is arranged on the lower side of the interface of the water and the organic solvent; installing a liquid pool on a clamp, and installing a magnetic absorption type light transmittance probe on the surface of the liquid pool;
step three, starting a laser to perform laser ablation for a certain time, generating nano-scale liquid drops by the target under the bombardment of the laser, and performing self-assembly on the nano-scale liquid drops in the liquid to obtain nano-particles; the laser intensities reaching the surfaces of the two target materials are different due to different absorption of the water and the organic solvent to the laser, and the self-assembly capacities of the nano particles in the water and the organic solvent are different, so that the particle size of the nano particles formed in the water is different from that of the nano particles formed in the organic solvent;
step four, turning off the laser to enable the liquid in the liquid pool to stand for a certain time; the two formed nano particles are self-assembled into a single-layer film at the interface of water and an organic solvent due to the interface action, the nano particles with large particle sizes are mutually adjacent to form the single-layer film, and the nano particles with small particle sizes are inserted into gaps among the nano particles with large particle sizes in an embedded mode;
and observing the change of the transmittance of water and the organic solvent on the computer during standing, taking down the liquid pool after the transmittance of the water and the organic solvent is stable, pumping out most of the upper liquid layer by using an injector, and then taking down the upper half part of the liquid pool, thereby conveniently taking out the nano single-layer film formed at the interface.
The target material is Au, Ag, Pt, ZnO, Fe3O4Or PbS; the organic solvent is toluene, ethyl acetate or diethyl ether.
The invention has the beneficial effects that:
the target seat positioned at the liquid interface is arranged, so that laser enters from the liquid interface and ablates different targets positioned in different environments, and the targets are very close to the interface and are only less than 3mm, so that the self-assembly can be easily carried out at the interface, the self-assembly of the targets at the interface can be carried out to obtain a single-layer film, and the preparation method has good controllability, is more energy-saving and environment-friendly than a chemical preparation method and has no pollution; the self-assembly process of the liquid interface is indirectly monitored by using the transmittance monitoring, the accuracy is good, and the monitoring cost is low; the device and the method are suitable for preparing nano single-layer film structures with various components and can be widely applied to various scientific research laboratories.
Drawings
The accompanying drawings, which are included to provide a further understanding of the disclosed subject matter, are incorporated in and constitute a part of this specification. The drawings illustrate the implementations of the disclosed subject matter and, together with the detailed description, serve to explain the principles of implementations of the disclosed subject matter. No attempt is made to show structural details of the disclosed subject matter in more detail than is necessary for a fundamental understanding of the disclosed subject matter and various modes of practicing the same.
FIG. 1 is a schematic view of the overall structure of the present invention;
fig. 2 is a schematic structural view of a target module according to the present invention;
FIG. 3 is a schematic view of a liquid pool structure of the present invention;
FIG. 4 is a schematic view of a spot and backing plate of the present invention;
FIG. 5 is an electron micrograph of a monolayer film prepared according to the present invention.
Detailed Description
The advantages, features and methods of accomplishing the same will become apparent from the drawings and the detailed description that follows.
Example 1:
as shown in fig. 1, a laser nanomaterial processing system includes a laser 1, a beam shaping module 2, a target module 3, and a monitoring module 4.
The laser 1 is a visible light laser, and after laser output by the laser 1 enters the beam shaping module 2, the light spot of the laser is adjusted to be an 8-shaped light spot; the 8-shaped light spot, namely the laser light spot, is 8-shaped, and the light intensity has two equal maximum values in the vertical direction;
as shown in fig. 2, the target module 3 has a liquid tank 5 containing liquid and a target holder 6, the liquid tank 5 contains water and another organic solvent that is not mutually soluble with water; two targets 7 with different components are arranged on the target holder 6, one target 7 is vertically arranged on the upper side of the interface of water and organic solvent, and the other target 7 is arranged on the lower side of the interface of water and organic solvent; the 8-shaped laser irradiates the target modules 3, two maximum values of light spots respectively irradiate the two targets 7, and nanoparticles are obtained through ablation;
the monitoring module 4 monitors the change of the transmissivity of the water and the organic solvent, and can stop laser output and stand after the monitored transmissivity reaches a required value, so that the ablation time of the laser and the standing time after the laser ablation are controlled;
as shown in fig. 4, when the processing system is in operation, the laser intensities reaching the surfaces of the two targets 7 are different due to different laser absorption by water and the organic solvent, and the self-assembly capabilities of the nanoparticles in the water and the organic solvent are different, so that the particle size of the nanoparticles formed in the water is different from the particle size of the nanoparticles formed in the organic solvent;
as shown in fig. 5, the two types of nanoparticles self-assemble into a monolayer film at the interface of water and organic solvent due to interfacial action, the nanoparticles with large particle size are closely adjacent to each other to form a monolayer film, and the nanoparticles with small particle size are inserted in the gaps between the nanoparticles with large particle size in an embedded manner.
The laser 1 is a 532nm pulse laser with a pulse frequency of 5 Hz-1K Hz and a power of 100-800W.
The target module 3 comprises a mounting bracket 8, a liquid tank 5, a clamp 9 and a target rotating seat 10, wherein the liquid tank 5 and the clamp 9 are both arranged on the mounting bracket 8, and the clamp 9 is used for fixing the liquid tank 5; the target material rotating seat 10 is used for fixing the target seat 6, and the target seat 6 is circular; the target rotating seat 10 can rotate around a horizontal shaft, so that the target 7 on the target seat 6 can be adjusted to be in a relative position with the laser beam;
the liquid bath 5 is made of quartz material.
The monitoring module 4 comprises two groups of magnetic absorption type light transmittance probes and a computer; the computer is connected with the magnetic absorption type light transmissivity probe, the target material rotating seat 10 and the laser 1 and is used for monitoring data of the magnetic absorption type light transmissivity probe, adjusting the position of the target material 7, controlling the laser 1 to be switched on and off and adjusting laser parameters of the laser 1;
magnetic-type light transmittance probe comprises a light emitting head 11 and a light receiving head 12, wherein the light emitting head 11 and the light receiving head 12 can be respectively installed on the side wall of the liquid pool 5, and the opposite surfaces of the light emitting head 11 and the light receiving head 12 are provided with different magnetic poles, so that the magnetic-type light transmittance probe can be mutually adsorbed on the surface of the liquid pool 5 by magnetic force and can be automatically aligned by the magnetic force.
As shown in fig. 3, the liquid pool 5 is formed by splicing an upper part and a lower part, and the upper part can be pulled out after the processing is finished, so that the nano structure formed at the liquid interface can be conveniently extracted.
Example 2:
a method for preparing a nano single-layer film by using the laser nano material processing system comprises the following steps:
step one, respectively installing two selected target materials 7 on two target material installation positions of a target seat 6 and fixing; then the target holder 6 is arranged on the target rotating holder 10; then, detecting the laser spot position output by the beam shaping module 2 by using sensitive paper, and then adjusting the position of the target 7 by using a computer to match the laser spot position with the laser spot position;
step two, injecting water and an organic solvent into the liquid pool 5, wherein the interface of the organic solvent and the water is positioned at the center of the target holder 6, so that one target is vertically arranged on the upper side of the interface of the water and the organic solvent, and the other target is arranged on the lower side of the interface of the water and the organic solvent; installing a liquid pool 5 on a clamp 9, and installing a magnetic absorption type light transmittance probe on the surface of the liquid pool 5;
step three, starting the laser 1 to perform laser ablation for a certain time, generating nano-scale liquid drops by the target 7 under the bombardment of the laser, and performing self-assembly on the nano-scale liquid drops in the liquid to obtain nano-particles; the laser intensities reaching the surfaces of the two target materials are different due to different absorption of the water and the organic solvent to the laser, and the self-assembly capacities of the nano particles in the water and the organic solvent are different, so that the particle size of the nano particles formed in the water is different from that of the nano particles formed in the organic solvent;
step four, turning off the laser 1, allowing the liquid in the liquid pool 5 to stand for a certain time, observing the change of the transmittance of water and the organic solvent on the computer during the period, wherein the formed two types of nanoparticles are self-assembled into a single-layer film at the interface of the water and the organic solvent due to the interface action, the nanoparticles with large particle sizes are closely adjacent to each other to form the single-layer film, and the nanoparticles with small particle sizes are inserted into gaps among the nanoparticles with large particle sizes in an embedded mode;
and taking down the liquid pool 5 after the permeability of water and the organic solvent is stable, pumping out most of the upper liquid through an injector, and taking down the upper half part of the liquid pool 5, so that the nano single-layer film formed at the interface can be conveniently taken out.
The target material is Au, Ag, Pt, ZnO, Fe3O4Or PbS; the organic solvent is toluene, ethyl acetate or diethyl ether.
Example 3:
this example allows the preparation of structures of more than three components;
respectively mounting and fixing three selected targets 7 on two target mounting positions of a target seat 6, wherein the target seat is provided with a plurality of mounting positions around the circle center, and the three targets are four, namely two Au targets, one ZnO target and one PbS target; the ZnO and the PbS are adjacently arranged, and two Au target materials are arranged on the opposite sides of the ZnO and the PbS; then the target holder 6 is arranged on the target rotating holder 10; then, detecting the laser spot position output by the beam shaping module 2 by using sensitive paper, and then adjusting the position of the target 7 by using a computer to match the laser spot position with the laser spot position;
injecting water and an organic solvent into the liquid pool 5, wherein the interface of the organic solvent and the water is positioned at the center of the target holder 6, so that one ZnO target is vertically arranged on the upper side of the interface of the water and the organic solvent, and the other Au target is arranged on the lower side of the interface of the water and the organic solvent; installing a liquid pool 5 on a clamp 9, and installing a magnetic absorption type light transmittance probe on the surface of the liquid pool 5;
step three, starting the laser 1 to perform laser ablation for a certain time, generating nano-scale liquid drops by the target 7 under the bombardment of the laser, and performing self-assembly on the nano-scale liquid drops in the liquid to obtain nano-particles; the laser intensities reaching the surfaces of the two target materials are different due to different absorption of the water and the organic solvent to the laser, and the self-assembly capacities of the nano particles in the water and the organic solvent are different, so that the particle size of the nano particles formed in the water is different from that of the nano particles formed in the organic solvent;
in the processing process, the target rotating seat is rotated, so that one PbS target is vertically arranged on the upper side of an interface between water and an organic solvent, the other Au target is arranged on the lower side of the interface between the water and the organic solvent, and the positions of PbS and ZnO are constantly exchanged;
step four, turning off the laser 1 to enable the liquid in the liquid pool 5 to stand for a certain time; the two formed nanoparticles are self-assembled into a single-layer film at the interface of water and an organic solvent due to the interface action, Au nanoparticles with large particle sizes are mutually adjacent to form the single-layer film, ZnO nanoparticles and PbS nanoparticles with small particle sizes are inserted into gaps among the nanoparticles with large particle sizes in an embedded mode, and the single-layer film with three components is formed;
and (3) observing the change of the permeability of the water and the organic solvent on the computer during standing, taking down the liquid pool 5 after the permeability of the water and the organic solvent is stable, pumping out most of the upper liquid layer by an injector, and then taking down the upper half part of the liquid pool 5, thereby conveniently taking out the nano single-layer film formed at the interface.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (7)
1. The utility model provides a laser nano-material system of processing, includes laser instrument (1), beam shaping module (2), target module (3) and monitoring module (4), its characterized in that:
the laser (1) is a visible light laser, and after laser output by the laser (1) enters the beam shaping module (2), the light spot of the laser is adjusted to be an 8-shaped light spot; the 8-shaped light spot, namely the laser light spot, is 8-shaped, and the light intensity has two equal maximum values in the vertical direction;
the target module (3) is provided with a liquid pool (5) filled with liquid and a target holder (6), wherein the liquid pool (5) is internally provided with water and another organic solvent which is not mutually dissolved with the water; two targets (7) with different components are arranged on the target holder (6), one target (7) is vertically arranged on the upper side of the interface of water and organic solvent, and the other target (7) is arranged on the lower side of the interface of water and organic solvent; the 8-shaped light spots irradiate the target modules (3), two maximum values of the light spots just respectively irradiate the two targets (7), and the nano particles are obtained through ablation;
the monitoring module (4) monitors the change of the transmissivity of the water and the organic solvent, thereby controlling the ablation time of the laser and the standing time after the laser ablation.
2. The laser nanomaterial processing system of claim 1, wherein:
the laser (1) is a 532nm pulse laser, the pulse frequency is 5 Hz-1K Hz, and the power is 100-800W.
3. The laser nanomaterial processing system of claim 1, wherein:
the target module (3) comprises a mounting bracket (8), a liquid pool (5), a clamp (9) and a target rotating seat (10), wherein the liquid pool (5) and the clamp (9) are both arranged on the mounting bracket (8), and the clamp (9) is used for fixing the liquid pool (5); the target rotating seat (10) is used for fixing the target seat (6), and the target seat (6) is circular; the target rotating seat (10) can rotate around a horizontal shaft, so that the target (7) on the target seat (6) can be adjusted to be in a relative position with the laser beam;
the liquid pool (5) is made of quartz material.
4. The laser nanomaterial processing system of claim 3, wherein:
the monitoring module (4) comprises two groups of magnetic absorption type light transmittance probes and a computer; the computer is connected with the magnetic absorption type light transmittance probe, the target rotating seat (10) and the laser (1) and is used for monitoring data of the magnetic absorption type light transmittance probe, adjusting the position of the target (7), controlling the laser (1) to be switched on and off and adjusting laser parameters of the laser (1);
magnetic-type light transmittance probe comprises a light emitting head (11) and a light receiving head (12), wherein the light emitting head (11) and the light receiving head (12) can be respectively installed on the side wall of the liquid pool (5), and opposite surfaces of the light emitting head (11) and the light receiving head (12) are provided with different magnetic poles, so that the magnetic-type light transmittance probe can be mutually adsorbed on the surface of the liquid pool (5) by magnetic force and can be automatically aligned by the magnetic force.
5. The laser nanomaterial processing system of claim 4, wherein:
the liquid pool (5) is formed by splicing an upper part and a lower part, and the upper part can be pulled out after the processing is finished so as to extract the nano single-layer film formed at the liquid interface.
6. A method for preparing a nano monolayer film by using the laser nano material processing system of claim 5, comprising the following steps:
step one, respectively installing two selected targets (7) on two target installation positions of a target seat (6) and fixing; then, mounting the target holder (6) on the target rotating holder (10); then, detecting the laser spot position output by the beam shaping module (2) by using sensitive paper, and then adjusting the position of the target (7) by using a computer to enable the target to be matched with the laser spot;
step two, injecting water and an organic solvent into the liquid pool (5), wherein the interface of the organic solvent and the water is positioned at the center of the target holder (6), so that one target is vertically arranged on the upper side of the interface of the water and the organic solvent, and the other target is arranged on the lower side of the interface of the water and the organic solvent; installing a liquid pool (5) on a clamp (9), and installing a magnetic absorption type light transmittance probe on the surface of the liquid pool (5);
step three, starting a laser (1) to perform laser ablation, generating nano-scale liquid drops from the target (7) under the bombardment of laser, and performing self-assembly on the nano-scale liquid drops in liquid to obtain nano-particles;
step four, turning off the laser (1) to enable the liquid in the liquid pool (5) to stand still;
and observing the change of the permeability of the water and the organic solvent displayed on the computer during standing, taking down the liquid pool (5) after the permeability of the water and the organic solvent is stable, pumping out most of the upper liquid layer by an injector, then taking down the upper half part of the liquid pool (5), and taking out the nano single-layer film formed at the interface.
7. The method for preparing a nano monolayer film according to claim 6, wherein:
the target material is Au, Ag, Pt, ZnO, Fe3O4Or PbS; the organic solvent is toluene, ethyl acetate or diethyl ether.
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