CN112945661B - Method for preparing surface micro-wrinkle pattern by using shape memory polymer particles - Google Patents
Method for preparing surface micro-wrinkle pattern by using shape memory polymer particles Download PDFInfo
- Publication number
- CN112945661B CN112945661B CN202110101402.0A CN202110101402A CN112945661B CN 112945661 B CN112945661 B CN 112945661B CN 202110101402 A CN202110101402 A CN 202110101402A CN 112945661 B CN112945661 B CN 112945661B
- Authority
- CN
- China
- Prior art keywords
- shape memory
- memory polymer
- polymer particles
- micro
- recovery
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/286—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q involving mechanical work, e.g. chopping, disintegrating, compacting, homogenising
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
- C08J7/04—Coating
- C08J7/06—Coating with compositions not containing macromolecular substances
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/44—Sample treatment involving radiation, e.g. heat
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2325/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring; Derivatives of such polymers
- C08J2325/02—Homopolymers or copolymers of hydrocarbons
- C08J2325/04—Homopolymers or copolymers of styrene
- C08J2325/06—Polystyrene
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2363/00—Characterised by the use of epoxy resins; Derivatives of epoxy resins
Abstract
The invention discloses a method for preparing surface micro-wrinkle patterns by utilizing shape memory polymer particles, and belongs to the technical field of high polymer materials. The method comprises the steps of utilizing shape memory polymer as an elastic material, carrying out hot pressing, deformation and cooling on the elastic material to fix a temporary shape, then spraying metal particle layers with different thicknesses on shape memory polymer particles with the flat temporary shape, then taking out an obtained sample to carry out stimulation recovery, and controlling the recovery degree by changing the recovery stimulation condition in the recovery process of the deformed particles, so that the micro-wrinkle patterns with different sizes and morphological structures can be obtained. The invention effectively unifies different stimulation methods and shape recovery performance, has important significance for preparing micro/nano topological structures, and has very wide application potential for forming abundant and complex folded micro patterns on the metal film on the polymer particles.
Description
Technical Field
The invention relates to a method for preparing surface micro-wrinkle patterns by utilizing shape memory polymer particles, belonging to the technical field of high polymer materials.
Background
Micropatterns have a wide range of applications in several areas, for example: photoelectronics, biosensors, anti-counterfeiting, physics and the like. The micro-pattern prepared by utilizing the shape memory effect of the shape memory polymer attracts the attention of scholars due to the controllable performance of the topological structure. The formation of complex ordered regular patterns on simple systems, such as regular ordered graphical structures formed by exploiting the shape memory properties of shape memory polymer particles, is an important area of current research. The conventional method for preparing a micro-pattern is generally prepared macroscopically, and the basic principle is that a metal film is covered on a soft substance which has elasticity and is in an elastic state, and wrinkles can appear after the soft substance is recovered. The invention focuses on micro-folds in a microscopic state, and the micro-folds are generated by replacing the existing elastic soft substance with deformable shape memory microspheres, spraying metal particles after temporary shape fixing and subsequent change after stimulating shape recovery. The invention has the advantages that the preparation of the micro-wrinkle pattern is realized by utilizing the shape memory property of the shape memory microspheres in the microscopic field, and the preparation of the micro-wrinkle pattern cannot be realized because the ordinary elastic material microspheres cannot deform and fix the temporary shape in the microscopic field.
Disclosure of Invention
In order to solve the problems in the existing micropattern preparation process, the invention provides a method for preparing a surface micropattern pattern by using shape memory polymer particles. The prepared micro-fold pattern mainly has a stripe structure, a labyrinth structure, a sawtooth structure and the like, wherein transition morphologies of the structures exist. According to the invention, the surface strain state of the polymer particles is changed by regulating the temporary shape recovery degree or a stimulation method of the polymer particles, the deposited metal film can be controlled to form a regular and ordered wrinkle pattern on the surface structure, and the size and the shape structure of the wrinkle pattern have the characteristics of regulation and control, so that the preparation method is a good method for preparing the micro-wrinkle pattern with the adjustable size and shape structure.
The invention firstly provides a method for preparing a surface micro-wrinkle pattern, which comprises the following steps:
step (1): preparing a dispersion solution by dispersing shape memory polymer particles in water, then sucking the dispersion solution and dropwise adding the dispersion solution on a cleaned bottom support, and drying the dispersion solution for later use;
step (2): covering the bottom support with the shape memory polymer particles dispersed on the surface obtained in the step (1) with a clean support with the same size, so that the shape memory polymer particles are uniformly dispersed between the two supports;
and (3): carrying out hot pressing, deformation and cooling on the sample obtained in the step (2) to fix the temporary shape, and then separating the upper support from the bottom support to obtain shape memory polymer particles which are dispersed on the surface of the bottom support and have flat temporary shapes;
and (4): and (3) spraying metal particle layers with different thicknesses on the shape memory polymer particles which are dispersed on the surface of the bottom support and have the temporary flat shape, taking out the obtained sample for stimulus recovery, and controlling the recovery degree by changing the condition of the stimulus recovery in the process of recovering the deformed particles, so that the micro-wrinkle patterns with different sizes and morphological structures can be obtained.
In one embodiment of the present invention, the Shape Memory Polymer (SMP) is a Polymer material that can restore its original Shape after an article with an original Shape is fixed and its original condition is changed under a certain condition by stimulation of an external condition (such as heat, electricity, light, chemical induction, etc.).
In one embodiment of the present invention, the shape memory polymer includes any one of a thermotropic SMP, an electro SMP, a photo SMP, and a chemo-inductive SMP.
In one embodiment of the present invention, the shape memory polymer includes, but is not limited to, polystyrene, epoxy, polyurethane, polycaprolactone, and the like.
In one embodiment of the present invention, the size of the shape memory polymer particles is preferably micro-nano size, and particularly preferably greater than or equal to 5 nm.
In one embodiment of the present invention, the water in step (1) is preferably deionized water, and the dispersion is preferably dispersed by using ultrasound.
In one embodiment of the present invention, the dispersion in step (1) contains 1% by mass of the shape memory polymer based on the mass of water.
In one embodiment of the present invention, the bottom support or supports include, but are not limited to, silicon wafers, tempered glass, and the like.
In one embodiment of the present invention, the hot pressing in step (3) is preferably performed in a nano-imprinting machine, and the size and distribution of the wrinkles can be controlled by controlling the size of the deformation of the shape memory polymer particles by controlling the pressure during the hot pressing.
In one embodiment of the present invention, the spraying of the metal particle layer in step (4) is preferably performed on a gold spraying apparatus.
In one embodiment of the present invention, the metal particles in step (4) include gold, silver, copper, iron, nickel, and other metal particles.
In one embodiment of the present invention, the stimulus in step (4) is an external stimulus to the corresponding shape memory polymer, such as a thermal stimulus, a light stimulus, a chemosensory stimulus, and the like.
The invention also provides the surface micro-wrinkle pattern prepared by the preparation method.
Finally, the invention provides applications of the surface micro-wrinkle pattern in the fields of sensors, catalysis, drug delivery, magnetic biomarkers, optoelectronics, and the like.
Has the beneficial effects that:
(1) The shape memory polymer particles are micro-nano-scale shape memory polymer particles with excellent performance, and micro-fold patterns prepared by using the shape memory polymer particles as a matrix have the characteristics of adjustable size and morphology structure. The preparation method provided by the invention can change the surface strain state of the polymer particles by changing the temporary shape recovery degree of the polymer particles or a stimulation method, can control the deposited metal film to form a regular and ordered fold pattern on the surface structure, has simple preparation process and strong operability, and is beneficial to the application of the shape memory polymer particle material in the fields of optical zooming, intelligent anti-counterfeiting, sensors and the like.
(2) The invention combines the hot pressing technology and the shape memory performance, and the metal film on the surface of the polymer particles is subjected to the action of substrate compressive stress due to shape recovery in the shape recovery process, thereby spontaneously forming a regular and ordered fold pattern. Compared with the traditional micro-pattern preparation method, the method has the advantages of simple preparation process, low cost, controllable pattern size, adjustable shape and structure and the like, so that the method for preparing the surface micro-wrinkle pattern by utilizing the shape memory polymer particles is very simple and effective. Different stimulation methods and shape recovery performance are effectively unified, the method has important significance for preparing micro/nano topological structures, and the metal film on the polymer particles forms rich and complex folded micro patterns and has very wide application potential.
Drawings
Fig. 1 is a schematic diagram of a preparation method of the micro-wrinkle pattern.
FIG. 2A wrinkled pattern (gold layer thickness of 11 nm) generated by the recovery of 30 μm polystyrene microspheres prepared in example 2 by heat stimulation.
FIG. 3A wrinkled pattern (gold layer thickness 11 nm) generated by toluene solvent stimulated recovery of 30 μm polystyrene microsphere prepared in example 2.
Detailed Description
The present invention is further described below with reference to examples, but the embodiments of the present invention are not limited thereto.
Example 1
a. Dispersing shape memory polymer particles (micro-nano size) in deionized water for ultrasonic dispersion, then sucking the dispersion liquid, dropwise adding the dispersion liquid on a cleaned silicon chip, and drying the silicon chip in a drying oven for 24 hours for later use.
b. And (b) taking the silicon wafer with the uniformly dispersed shape memory polymer particles on the surface obtained in the step (a) out of the drying box, and covering a clean silicon wafer with the same size on the silicon wafer to uniformly disperse the shape memory polymer particles between the two silicon wafers.
c. Putting the silicon wafer sample obtained in the step (b) into a nano-imprinting machine for hot pressing, deforming and cooling to fix a temporary shape, and then separating an upper silicon wafer from a bottom silicon wafer to obtain shape memory polymer particles which are dispersed on the surface of the silicon wafer and have flat temporary shapes.
d. And (c) putting the polymer particle sample obtained in the step (c) and a substrate silicon wafer into gold spraying equipment, spraying metal particle layers with different thicknesses, taking out the sprayed particles and the silicon wafer sample, and heating or stimulating and recovering by a solvent, wherein in the recovery process of deformed particles, the micro-wrinkle patterns with different sizes and shapes and structures are obtained by changing the recovery temperature and adjusting the stimulation time of the solvent. As shown in fig. 1.
Example 2
a. Dispersing polystyrene shape memory polymer particles (with the size of 5-100 microns) in deionized water, performing ultrasonic dispersion to obtain a dispersion liquid with the concentration of 1%, then sucking the dispersion liquid, dropwise adding the dispersion liquid on a cleaned silicon chip, and drying the silicon chip in a drying oven for 24 hours for later use;
b. taking the silicon wafer with the surface uniformly dispersed with the shape memory polymer particles obtained in the step (a) out of a drying box, and covering a clean silicon wafer with the same size on the silicon wafer to uniformly disperse the shape memory polymer particles between the two silicon wafers;
c. putting the silicon wafer sample obtained in the step (b) into a nano-imprinting machine for hot pressing (the hot pressing pressure is 2MPa, and the temperature is 120 ℃), deforming, cooling and fixing a temporary shape, and then separating an upper silicon wafer from a bottom silicon wafer to obtain shape memory polymer particles which are dispersed on the surface of the silicon wafer and have flat temporary shapes;
d. putting the polymer particle sample obtained in the step (c) and a substrate silicon wafer into a gold spraying device together to spray a gold particle layer with the thickness of 11nm, taking out the sprayed particles and the silicon wafer sample to perform heating stimulation recovery, and obtaining the micro-wrinkle patterns with different sizes and morphological structures by changing the stimulation mode of the heating stimulation or toluene stimulation in the recovery process of the deformed particles, wherein the patterns are respectively shown in fig. 2 and fig. 3.
Example 3
a. Dispersing polystyrene shape memory polymer particles (with the size of 5-100 micrometers) in deionized water, performing ultrasonic dispersion to obtain a dispersion liquid with the concentration of 1%, then sucking the dispersion liquid, dropwise adding the dispersion liquid on a cleaned silicon wafer, and placing the silicon wafer into a drying oven to dry for 24 hours for later use;
b. taking the silicon wafer with the surface uniformly dispersed with the shape memory polymer particles obtained in the step (a) out of the drying box, and covering a clean silicon wafer with the same size on the silicon wafer to uniformly disperse the shape memory polymer particles between the two silicon wafers;
c. putting the silicon wafer sample obtained in the step (b) into a nano-imprinting machine for hot pressing (the hot pressing pressure is 2.5MPa, and the temperature is 120 ℃), deforming, cooling and fixing a temporary shape, and then separating an upper silicon wafer from a bottom silicon wafer to obtain shape memory polymer particles which are dispersed on the surface of the silicon wafer and have flat temporary shapes;
d. and (c) putting the polymer particle sample obtained in the step (c) and a substrate silicon wafer into gold spraying equipment, spraying a metal silver particle layer with the thickness of 10nm, taking out the sprayed particles and the silicon wafer sample, and heating, stimulating and recovering, wherein in the recovery process of deformed particles, the recovery temperature is changed to obtain the micro-wrinkle patterns with different sizes and shapes and structures.
Example 4
a. Dispersing epoxy polymer particles (with the size of 10-20 microns) in deionized water, performing ultrasonic dispersion to obtain a dispersion liquid with the concentration of 1%, then sucking the dispersion liquid, dropwise adding the dispersion liquid on a cleaned silicon wafer, and drying the silicon wafer in a drying oven for 24 hours for later use;
b. taking the silicon wafer with the surface uniformly dispersed with the shape memory polymer particles obtained in the step (a) out of a drying box, and covering a clean silicon wafer with the same size on the silicon wafer to uniformly disperse the shape memory polymer particles between the two silicon wafers;
c. putting the silicon chip sample obtained in the step (b) into a nano-imprinting machine for hot pressing (the hot pressing pressure is 3MPa, and the temperature is 130 ℃), deforming, cooling and fixing the temporary shape, and then separating an upper silicon chip from a bottom silicon chip to obtain shape memory polymer particles which are dispersed on the surface of the silicon chip and have flat temporary shapes;
d. and (c) putting the polymer particle sample obtained in the step (c) and a substrate silicon wafer into gold spraying equipment, spraying metal copper particle layers with the thicknesses of 5nm, 10nm and 20nm, taking out the sprayed particles and the silicon wafer sample, heating, and obtaining the micro-wrinkle patterns with different sizes and morphological structures through heating stimulation in the recovery process of deformed particles.
Although the present invention has been described with reference to the preferred embodiments, it should be understood that various changes and modifications can be made therein by those skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (11)
1. A method of preparing a surface micro-wrinkle pattern using shape memory polymer particles, the method comprising the steps of:
step (1): preparing a dispersion solution by dispersing shape memory polymer particles in water, then sucking the dispersion solution and dropwise adding the dispersion solution on a cleaned bottom support, and drying the dispersion solution for later use;
step (2): covering the bottom support with the surface dispersed with the shape memory polymer particles obtained in the step (1) with a clean support with the same size, so that the shape memory polymer particles are uniformly dispersed between the two supports;
and (3): carrying out hot pressing, deformation and cooling on the sample obtained in the step (2) to fix a temporary shape, and then separating the upper support from the bottom support to obtain shape memory polymer particles which are dispersed on the surface of the bottom support and have flat temporary shapes;
and (4): spraying metal particle layers with different thicknesses on the shape memory polymer particles which are dispersed on the surface of the bottom support and have the temporary flat shape and are obtained in the step (3), taking out the obtained sample for stimulus recovery, and in the recovery process of the deformed particles, controlling the recovery degree by changing the conditions of the stimulus recovery to obtain the micro-wrinkle patterns with different sizes and shapes and structures;
and (4) performing hot pressing in a nano-imprint press in the step (3), and controlling the deformation size of the shape memory polymer particles by controlling the pressure in the hot pressing process so as to control the size and distribution condition of wrinkles.
2. The method according to claim 1, wherein the shape memory polymer is a polymer material which can restore its original shape after the article having the original shape is fixed after changing its original condition under a certain condition by stimulation of an external condition.
3. The method of claim 2, wherein the shape memory polymer comprises any one of a thermotropic SMP, an electro-genic SMP, a photo-genic SMP, a chemo-inductive SMP.
4. A method according to any one of claims 1 to 3, wherein the shape memory polymer comprises any one of polystyrene, epoxy, polyurethane, polycaprolactone polymer.
5. The method of claim 4, wherein the shape memory polymer particles are micro-nano sized.
6. The method of claim 5, wherein the shape memory polymer particles are greater than or equal to 5 nanometers in size.
7. The method of claim 5, wherein the dispersion of step (1) comprises 1% shape memory polymer by weight of water.
8. The method as claimed in claim 7, wherein the metal particles in step (4) comprise any one or more of gold, silver, copper, iron, and nickel metal particles.
9. The method according to claim 8, wherein the stimulus in step (4) is an external stimulus to the corresponding shape memory polymer.
10. A surface micro-wrinkle pattern produced according to the method of any one of claims 1 to 9.
11. Use of the surface micro-wrinkle pattern according to claim 10 in the fields of sensors, catalysis, drug delivery, magnetic biomarkers, optoelectronics.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110101402.0A CN112945661B (en) | 2021-01-26 | 2021-01-26 | Method for preparing surface micro-wrinkle pattern by using shape memory polymer particles |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110101402.0A CN112945661B (en) | 2021-01-26 | 2021-01-26 | Method for preparing surface micro-wrinkle pattern by using shape memory polymer particles |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112945661A CN112945661A (en) | 2021-06-11 |
| CN112945661B true CN112945661B (en) | 2023-02-21 |
Family
ID=76236729
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110101402.0A Active CN112945661B (en) | 2021-01-26 | 2021-01-26 | Method for preparing surface micro-wrinkle pattern by using shape memory polymer particles |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112945661B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103789741A (en) * | 2014-02-20 | 2014-05-14 | 苏州华维纳纳米科技有限公司 | Method for preparing drape-based metal surface nanostructure |
| CN104891426A (en) * | 2015-04-07 | 2015-09-09 | 哈尔滨工业大学 | Preparation method for micropattern film with selective stimulation recovery function |
| CN105891185A (en) * | 2016-04-08 | 2016-08-24 | 广东工业大学 | Precious-metal micro-nanometer structure and preparing method and application thereof |
| CN109096710A (en) * | 2018-06-26 | 2018-12-28 | 深圳先进技术研究院 | A kind of shape memory microstructure film and its preparation method and application |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120213969A1 (en) * | 2011-02-18 | 2012-08-23 | Syracuse University | Functionally Graded Shape Memory Polymer |
-
2021
- 2021-01-26 CN CN202110101402.0A patent/CN112945661B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103789741A (en) * | 2014-02-20 | 2014-05-14 | 苏州华维纳纳米科技有限公司 | Method for preparing drape-based metal surface nanostructure |
| CN104891426A (en) * | 2015-04-07 | 2015-09-09 | 哈尔滨工业大学 | Preparation method for micropattern film with selective stimulation recovery function |
| CN105891185A (en) * | 2016-04-08 | 2016-08-24 | 广东工业大学 | Precious-metal micro-nanometer structure and preparing method and application thereof |
| CN109096710A (en) * | 2018-06-26 | 2018-12-28 | 深圳先进技术研究院 | A kind of shape memory microstructure film and its preparation method and application |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112945661A (en) | 2021-06-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Shao et al. | Shape memory superhydrophobic surface with switchable transition between “Lotus Effect” to “Rose Petal Effect” | |
| CN105865667B (en) | Condenser type pliable pressure sensor based on micro-structural dielectric layer and preparation method thereof | |
| Masuda et al. | Low-dimensional arrangement of SiO2 particles | |
| CN106756777B (en) | A kind of method and application by strain regulation wrinkled surface hydrophilic and hydrophobic reversible transition | |
| CN106531733A (en) | Flexible pressure sensor and preparation method therefor | |
| US20160257597A1 (en) | Method for manufacturing nanometric objects using the rupture of a layer deformed by wrinkles | |
| CN102157642A (en) | Nanoimprint based preparation method of LED with high light-emitting efficiency | |
| CN103771336A (en) | Manufacturing method of energy harvester based on piezoelectric polymer micro-structure array | |
| CN103023371A (en) | Micro-nano integrated generator and manufacturing method thereof | |
| CN104181770B (en) | It is a kind of that the method that micro-nano compound structure is manufactured with nano impression is printed based on 4D | |
| WO2020000942A1 (en) | Transparent, flexible and stretchable electromagnetic shielding thin film and method for preparing same | |
| KR101632504B1 (en) | method for the fabrication of nanostructures based on adhesion control using solvent vapor and nanotransfer printing using the same | |
| CN108299827B (en) | Preparation method of durable PDMS (polydimethylsiloxane) bionic super-hydrophobic membrane | |
| CN109867959B (en) | Method for forming wrinkles on surface of elastomer film | |
| CN107623459A (en) | Friction nanometer power generator frictional layer material surface roughening agrees with structure and preparation method thereof | |
| CN101928914A (en) | Method for preparing large-area two-dimensional super-structure material | |
| CN112945661B (en) | Method for preparing surface micro-wrinkle pattern by using shape memory polymer particles | |
| CN103434127A (en) | High depth-to-width ratio nanofiber structure based on mechanical stretching and preparation method of high depth-to-width ratio nanofiber structure | |
| CN106611638A (en) | Low temperature conductive micrometer and/or nanowire network transfer method | |
| CN109971021B (en) | Folded graphene oxide/latex flexible film and preparation and application thereof | |
| CN115367698B (en) | Novel InP nanowire array and preparation method thereof | |
| CN110841881B (en) | Method for quickly preparing self-assembly coating driven by thermal induction tension gradient | |
| CN113380941B (en) | Out-of-plane thermoelectric device with stretchable porous structure | |
| CN108892099A (en) | A method of coining ultra-thin materials prepare uniform outer surface micro-structure | |
| CN106270534A (en) | The preparation method of metal nano/micron ring in order |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |