WO2018076432A1 - 生物相容性封装磁性机器人及其制备方法 - Google Patents
生物相容性封装磁性机器人及其制备方法 Download PDFInfo
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- WO2018076432A1 WO2018076432A1 PCT/CN2016/107684 CN2016107684W WO2018076432A1 WO 2018076432 A1 WO2018076432 A1 WO 2018076432A1 CN 2016107684 W CN2016107684 W CN 2016107684W WO 2018076432 A1 WO2018076432 A1 WO 2018076432A1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B81—MICROSTRUCTURAL TECHNOLOGY
- B81C—PROCESSES OR APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OR TREATMENT OF MICROSTRUCTURAL DEVICES OR SYSTEMS
- B81C1/00—Manufacture or treatment of devices or systems in or on a substrate
- B81C1/00015—Manufacture or treatment of devices or systems in or on a substrate for manufacturing microsystems
- B81C1/00023—Manufacture or treatment of devices or systems in or on a substrate for manufacturing microsystems without movable or flexible elements
- B81C1/00103—Structures having a predefined profile, e.g. sloped or rounded grooves
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B81—MICROSTRUCTURAL TECHNOLOGY
- B81B—MICROSTRUCTURAL DEVICES OR SYSTEMS, e.g. MICROMECHANICAL DEVICES
- B81B1/00—Devices without movable or flexible elements, e.g. microcapillary devices
Definitions
- the invention relates to the field of micro-nano precision processing technology, in particular to a biocompatible package magnetic robot and a preparation method thereof.
- Micro-robots based on magnetic control make them particularly suitable for operation in tight and closed environments due to their small size and free unconstrained motion.
- it due to its biocompatibility and chemical resistance, it minimizes damage to living samples. It has great application prospects in the direction detection and targeted drug loading in the human body, the transportation of particles in the microfluidic channel, and the handling, classification and assembly of microscopic objects in the chip laboratory.
- micro-electro-mechanical systems technology MEMS
- MEMS micro-electro-mechanical systems technology
- the magnetic drive has the advantages of strong controllability, greater power, wide operating range and no damage, especially suitable for biomedical applications, especially for living intervention applications.
- biomedical applications especially for living intervention applications.
- magnetic micro-robots mainly include the following: fused deposition molding method, etching method, laser cutting method, integrated photomask micro-molding method, micro-machining method, two-photon polymerization method, and the like.
- micro-robots made by the above methods make the magnetic materials exposed to the external environment, and the magnetic robots cannot be guaranteed to have good biocompatibility and chemical resistance.
- a method for preparing a biocompatible package magnetic robot comprising:
- a developing operation is performed on the third prefabricated layer structure to obtain a biocompatible package magnetic robot.
- the magnetic composite consists of neodymium iron boron magnetic powder and SU-8 photoresist.
- the magnetic composite consists of a mass fraction of 60% neodymium iron boron magnetic powder and a SU8% photoresist having a mass fraction of 40%.
- the neodymium iron boron magnetic powder has an average diameter of 2 ⁇ m.
- the SU-8 photoresist is spin-coated on the Omnicoat sacrificial layer by spin coating at a spin coating speed of 400-600 rpm for 3-8 s, and at a spin coating speed of 1800-2000 rpm. Spin coating for 30s.
- the magnetic composite material is prepared by mixing a mass fraction of 60% neodymium iron boron magnetic powder and a mass fraction of 40% SU-8 photoresist in a microcentrifuge tube.
- the magnetic composite material before the magnetic composite material is coated on the SU-8 base layer, the magnetic composite material is vortexed at 3000 r/min for 30 min to achieve the magnetic composite material in SU-8 light. Uniform distribution in the engraving.
- the exposure energy for patterning the second prefabricated layer structure is 130 mJ/cm 2 .
- the developing the second prefabricated layer structure is performed by: immersing the second prefabricated layer structure in a SU-8 photoresist developer to remove uncrosslinked SU- 8 photoresist, then washed with deionized water and air dried;
- the developing operation of the third prefabricated layer structure is: immersing the third prefabricated layer structure in a SU-8 photoresist developer to remove the uncrosslinked SU-8 photoresist, and then using Wash with deionized water and air dry.
- the first prefabricated layer structure is baked by baking the first prefabricated layer structure at 60-70 ° C for 1.5-3 min, then baking at 90-100 ° C. -5min.
- the image forming the first prefabricated layer structure is baked by baking the first prefabricated layer structure after imagewise exposure at 60-70 ° C for 1.5-3 min. Then bake at 90-100 ° C for 3-5 min.
- the second prefabricated layer structure is baked by baking the second prefabricated layer structure at 60-70 ° C for 1.5-3 min, then baking at 90-100 ° C. -5min.
- the patterning and exposing the second pre-formed layer structure is performed by baking the second pre-formed layer structure after the pattern exposure at 60-70 ° C for 1.5-3 min. Then bake at 90-100 ° C for 3-5 min.
- the third prefabricated layer structure is baked by: The third prefabricated layer structure is baked at 60-70 ° C for 1.5-3 min and then baked at 90-100 ° C for 3-5 min.
- the baking of the patterned third exposed layer structure is performed by baking the patterned third exposed layer structure at 60-70 ° C for 1.5-3 minutes. Then bake at 90-100 ° C for 3-5 min.
- the time to graphically expose the first prefabricated layer structure is 20-35 s.
- the time to graphically expose the second prefabricated layer structure is 25-35 s.
- the time for the graphical exposure of the third prefabricated layer structure is 25-35 s.
- a biocompatible package magnetic robot obtained by the above preparation method.
- the biocompatible package magnetic robot has biocompatibility and chemical resistance because the magnetic particles are completely encapsulated in the inert SU-8 layer. Mass production is achieved in a single use with simple multi-layer lithography, increasing time and cost effectiveness.
- FIG. 1 is a schematic view showing a preparation method of a biocompatible package magnetic robot according to an embodiment
- FIG. 2 is a partial structural optical micrograph of a biocompatible packaged magnetic robot of an embodiment.
- a method for preparing a biocompatible package magnetic robot includes:
- the Omnicoat sacrificial layer is spin coated on a silicon wafer at 2000 rpm/s as shown in a of Figure 1, resulting in a 10-15 nm thick Omnicoat sacrificial layer.
- the SU-8 photoresist is spin coated on the Omnicoat sacrificial layer to provide a 15 micron thick SU-8 photoresist layer.
- the SU-8 photoresist is spin-coated on the Omnicoat sacrificial layer by spin coating at a spin coating speed of 400-600 rpm for 3-8 s and spin coating at 1800-2200 rpm for 30 s.
- the baking operation is baking at 60-70 ° C for 1.5-3 min, and then baking at 90-100 ° C for 3-5 min.
- the light intensity of the ultraviolet light source was 4.33 mW/cm 2 .
- the exposure time is 20-35s.
- the exposure energy of the patterned exposure is 130 mJ/cm 2 .
- the crosslinked and uncrosslinked SU-8 photoresist regions are formed after pattern exposure.
- the first prefabricated layer structure after imagewise exposure is baked.
- the baking operation is baking at 60-70 ° C for 1.5-3 min, then baking at 90-100 ° C 3-5min.
- a 20 micron thick magnetic composite is coated on the SU-8 base layer to provide a second prefabricated layer structure.
- the magnetic composite consists of neodymium iron boron magnetic powder and SU-8 photoresist. In one embodiment, the magnetic composite consists of a mass fraction of 60% neodymium iron boron magnetic powder and a SU8% photoresist having a mass fraction of 40%.
- the neodymium iron boron magnetic powder has an average diameter of 2 microns.
- the magnetic composite material is prepared by mixing a mass fraction of 60% neodymium iron boron magnetic powder and a mass fraction of 40% SU-8 photoresist by mixing in a microcentrifuge tube.
- the magnetic composite was vortexed for 30 min at 3000 r/min prior to use.
- the above method can avoid precipitation of the magnetic composite material, thereby obtaining a magnetic composite material having uniform dispersion.
- the baking operation is baking at 60-70 ° C for 1.5-3 min, and then baking at 90-100 ° C for 3-5 min.
- the second prefabricated layer structure is subjected to pattern exposure under irradiation of an ultraviolet light source.
- the light intensity of the ultraviolet light source was 4.33 mW/cm 2 .
- the exposure time is 25-35s.
- the exposure energy of the patterned exposure is 130 mJ/cm 2 .
- the cured magnetic composite region and the uncured magnetic composite region are formed after pattern exposure.
- the baking operation is baking at 60-70 ° C for 1.5-3 min, and then baking at 90-100 ° C for 3-5 min.
- the developing operation of the second prefabricated layer structure is: placing the second prefabricated layer structure Soaked in SU-8 photoresist developer to remove uncrosslinked SU-8 photoresist, rinse with deionized water and air dry.
- the uncrosslinked SU-8 photoresist is removed to develop the cured magnetic composite.
- a 15 micron thick SU-8 photoresist is applied to the outer surface of the second prefabricated layer structure to obtain a third prefabricated layer structure.
- the baking operation is baking at 60-70 ° C for 1.5-3 min, and then baking at 90-100 ° C for 3-5 min.
- the light intensity of the ultraviolet light source was 4.33 mW/cm 2 .
- the exposure time is 25-35s.
- the exposure energy of the patterned exposure is 130 mJ/cm 2 .
- the baking operation is baking at 60-70 ° C for 1.5-3 min, and then baking at 90-100 ° C for 3-5 min.
- the third prefabricated layer is subjected to a development operation by immersing the third prefabricated layer structure in the SU-8 photoresist developer to remove the uncrosslinked SU-8.
- the photoresist was washed with deionized water and air dried.
- the biocompatible package magnetic robot has biocompatibility and chemical resistance because the magnetic particles are completely encapsulated in the inert SU-8 layer. Mass production is achieved in a single use with simple multi-layer lithography, increasing time and cost effectiveness. In addition, the properties of the material can be customized by controlling the ratio of metal to polymer groups. These magnetic biocompatible packaged magnetic robots are capable of operating in a wide variety of complex environments.
- the biocompatible package magnetic robot is a biocompatible package magnetic robot obtained according to the preparation method of the above method.
- ad represents the high-resolution large-core core SU-8 geometry
- e represents the controllable heterogeneity of the Janus particle exhibiting magnetic particle density
- f represents the high-resolution internal and external shape of SU- 8 microstructures
- g represents the profile data of the biocompatible packaged magnetic robot in c.
- these composite structures exhibit similar clean, vertical sidewall geometries as compared to pure SU-8 patterning.
- the surface roughness of the top surface was 1 ⁇ m using a white light scanning interferometry (Zygo Newview 5000 profile scanner).
- the above biocompatible package magnetic robot is prepared from three layers of photosensitive materials.
- the outer two skin layers are SU-8 photoresist, and the inner core layer is a magnetic composite of NdFeB magnetic powder and SU-8 photoresist.
- the magnetic biocompatible package magnetic robot is made biocompatible and chemical resistant.
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- Hard Magnetic Materials (AREA)
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Abstract
Description
Claims (19)
- 一种生物相容性封装磁性机器人的制备方法,其特征在于,包括:提供硅片,在所述硅片上制备Omnicoat牺牲层;在所述Omnicoat牺牲层上旋涂SU-8光刻胶形成SU-8基层,得到第一预制层结构;将所述第一预制层结构进行烘烤;采用掩模对准器,在紫外线光源照射下,对所述第一预制层结构进行图形化曝光;将图像化曝光后的所述第一预制层结构进行烘烤;在所述第一预制层结构上涂覆磁性复合材料,得到第二预制层结构;将所述第二预制层结构进行烘烤;采用掩模对准器,在紫外线光源照射下,对所述第二预制层结构进行图形化曝光;将图形化曝光后的所述第二预制层结构进行烘烤;对所述第二预制层结构进行显影操作;在所述第二预制层结构的外表面涂覆SU-8光刻胶,得到第三预制层结构;将所述第三预制层结构进行烘烤;采用掩模对准器,在紫外线光源照射下,对所述第三预制层结构进行图形化曝光;将图形化曝光后的所述第三预制层结构进行烘烤;对所述第三预制层结构进行显影操作,得到生物相容性封装磁性机器人。
- 根据权利要求1所述的生物相容性封装磁性机器人的制备方法,其特征在于,所述磁性复合材料由汝铁硼磁粉和SU-8光刻胶组成。
- 根据权利要求2所述的生物相容性封装磁性机器人的制备方法,其特征在于,所述磁性复合材料由质量分数为60%汝铁硼磁粉和质量分数为40%的SU-8光刻胶组成。
- 根据权利要求2所述的生物相容性封装磁性机器人的制备方法,其特征 在于,所述汝铁硼磁粉的平均直径为2微米。
- 根据权利要求1所述的生物相容性封装磁性机器人的制备方法,其特征在于,所述在所述Omnicoat牺牲层上旋涂SU-8光刻胶为:先以旋涂速度为400-600rpm旋涂3-8s,再以旋涂速度为1800-2000rpm旋涂30s。
- 根据权利要求1所述的生物相容性封装磁性机器人的制备方法,其特征在于,所述磁性复合材料的制备方法为:在微量离心管中混合质量分数为60%汝铁硼磁粉与质量分数为40%的SU-8光刻胶。
- 根据权利要求6所述的生物相容性封装磁性机器人的制备方法,其特征在于,在所述SU-8基层上涂覆磁性复合材料之前,将所述磁性复合材料在3000r/min的条件下涡旋30min,实现所述磁性复合材料在SU-8光刻胶中的均匀分布。
- 根据权利要求1所述的生物相容性封装磁性机器人的制备方法,其特征在于,所述对所述第二预制层结构进行图形化曝光的曝光能量为130mJ/cm2。
- 根据权利要求1所述的生物相容性封装磁性机器人的制备方法,其特征在于:所述对所述第二预制层结构进行显影操作为:将所述第二预制层结构置于SU-8光刻胶显影剂中浸泡,除去未交联的SU-8光刻胶,再用去离子水清洗后风干;所述对所述第三预制层结构进行显影操作为:将所述第三预制层结构置于SU-8光刻胶显影剂中浸泡,除去未交联的SU-8光刻胶,再用去离子水清洗后风干。
- 根据权利要求1所述的生物相容性封装磁性机器人的制备方法,其特征在于:将所述第一预制层结构进行烘烤的操作为:将所述第一预制层结构在60-70℃烘烤1.5-3min,然后在90-100℃烘烤3-5min。
- 根据权利要求1所述的生物相容性封装磁性机器人的制备方法,其特征在于:将图像化曝光后的所述第一预制层结构进行烘烤的操作为:将图像化曝光后的所述第一预制层结构在60-70℃烘烤1.5-3min,然后在90-100℃烘烤3-5min。
- 根据权利要求1所述的生物相容性封装磁性机器人的制备方法,其特征在于:将所述第二预制层结构进行烘烤的操作为:将所述第二预制层结构在60-70℃烘烤1.5-3min,然后在90-100℃烘烤3-5min。
- 根据权利要求1所述的生物相容性封装磁性机器人的制备方法,其特征在于:将图形化曝光后的所述第二预制层结构进行烘烤的操作为:将图形化曝光后的所述第二预制层结构在60-70℃烘烤1.5-3min,然后在90-100℃烘烤3-5min。
- 根据权利要求1所述的生物相容性封装磁性机器人的制备方法,其特征在于:将所述第三预制层结构进行烘烤的操作为:将所述第三预制层结构在60-70℃烘烤1.5-3min,然后在90-100℃烘烤3-5min。
- 根据权利要求1所述的生物相容性封装磁性机器人的制备方法,其特征在于:将图形化曝光后的所述第三预制层结构进行烘烤的操作为:将图形化曝光后的所述第三预制层结构在60-70℃烘烤1.5-3min,然后在90-100℃烘烤3-5min。
- 根据权利要求1所述的生物相容性封装磁性机器人的制备方法,其特征在于:对所述第一预制层结构进行图形化曝光的时间为20-35s。
- 根据权利要求1所述的生物相容性封装磁性机器人的制备方法,其特征在于:对所述第二预制层结构进行图形化曝光的时间为25-35s。
- 根据权利要求1所述的生物相容性封装磁性机器人的制备方法,其特征在于:对所述第三预制层结构进行图形化曝光的时间为25-35s。
- 一种生物相容性封装磁性机器人,其特征在于,所述生物相容性封装磁性机器人为根据权利要求1-18任意一项权利要求所述的制备方法获得的所述生物相容性封装磁性机器人。
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610973129.XA CN106517081B (zh) | 2016-10-28 | 2016-10-28 | 磁性封装微机器人及其制备方法 |
| CN201610973129.X | 2016-10-28 |
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| WO2018076432A1 true WO2018076432A1 (zh) | 2018-05-03 |
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| CN111621747A (zh) * | 2019-02-28 | 2020-09-04 | 湖南早晨纳米机器人有限公司 | 纳米载药机器人的制备方法 |
| CN118219232A (zh) * | 2024-04-28 | 2024-06-21 | 南方科技大学 | 一种乙基纤维素微纳机器人及其制备方法与应用 |
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| CN107986230B (zh) * | 2017-12-07 | 2020-04-07 | 天津大学 | 一种图形化仿生磁性微纳米机器人制备方法 |
| JP7278287B2 (ja) * | 2017-12-19 | 2023-05-19 | ザ ユニヴァーシティ オブ ブリティッシュ コロンビア | 層状構造及び層状構造を製造するための方法 |
| CN115196585B (zh) * | 2022-06-01 | 2025-03-04 | 南方科技大学 | 一种磁控微纳机器人及其制作方法、用途 |
| CN116749151A (zh) * | 2023-06-19 | 2023-09-15 | 广州大学 | 一种磁性微型机器人及其制备方法 |
| CN119499164B (zh) * | 2024-11-18 | 2026-03-17 | 暨南大学 | 一种可定制构建的基于mof的磁控微机器人及其制备方法和应用 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111621747A (zh) * | 2019-02-28 | 2020-09-04 | 湖南早晨纳米机器人有限公司 | 纳米载药机器人的制备方法 |
| CN111621747B (zh) * | 2019-02-28 | 2022-06-14 | 湖南早晨纳米机器人有限公司 | 纳米载药机器人的制备方法 |
| CN118219232A (zh) * | 2024-04-28 | 2024-06-21 | 南方科技大学 | 一种乙基纤维素微纳机器人及其制备方法与应用 |
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| CN106517081A (zh) | 2017-03-22 |
| CN106517081B (zh) | 2018-03-09 |
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