Multi-photon three-dimensional(3D)nanoprinting technology,renowned for its 3D processing capability and nano-scale resolution beyond the diffraction limit,has garnered significant attention in the micro/nano-additive ...Multi-photon three-dimensional(3D)nanoprinting technology,renowned for its 3D processing capability and nano-scale resolution beyond the diffraction limit,has garnered significant attention in the micro/nano-additive manufacturing field.This technology finds widespread applications in optics,biology,and mechanical engineering research.However,its broader adoption in industrial production and applications has been hindered by limitations such as relatively slow processing speed and restricted material formability and functionality.This paper presents the latest advancements in multi-photon 3D nanoprinting,with a focus on analyzing optical methods to enhance the processing speed of scanning and projection techniques.Additionally,it examines issues related to the formability and functionality of commonly used photosensitive materials,including organic polymers,inorganic compounds,and composite materials.In conclusion,this paper offers a comprehensive summary from the perspectives of productivity,cost,materials,and cross-scale processing,along with proposed routes and future directions.展开更多
Increasing the texture complexity of high-performance surfaces can enhance their antifriction properties by altering their distribution and retention of lubricating oils.When a fluid flows through a fish-scale texture...Increasing the texture complexity of high-performance surfaces can enhance their antifriction properties by altering their distribution and retention of lubricating oils.When a fluid flows through a fish-scale texture,a lubricating layer is formed,effectively reducing friction.In this study,a bionic fish-scale structure is proposed,and ceramic components are fabricated and analyzed using micro/nano additive-manufacturing technology.First,the effects of various parameters on the antifriction performance of the fish-scale texture under hydrodynamic lubrication conditions are investigated.Then,the pressure distribution of the oil film—including both positive and negative pressures—is simulated by adjusting parameters such as the angleα,ratio of textured area to total surface area,and depth of the fish-scale texture.The results indicate that for a textured area that accounts for 20%of the total surface,texture depth of 150μm,and angleαof 30°,the pressure differential reaches its maximum.Finally,based on the optimized parameters,the designed fish-scale structure is fabricated using micro/nano ceramic three-dimensional-printing technology.Friction and wear tests are conducted on the sintered samples.The experimental results align well with the simulation data,indicating that the structure can reduce the friction coefficient by approximately 15%,thereby significantly improving the antifriction performance.This study provides a valuable reference for the surface engineering of other high-performance functional structures.展开更多
基金financially supported by the National Key Research and Development Program of China(2021YFF0502700)the National Natural Science Foundation of China(52275429 and 62205117)+4 种基金the Innovation Project of Optics Valley Laboratory(OVL2021ZD002)the Young Elite Scientists Sponsorship Program by CAST(2022QNRC001)the West Light Foundation of the Chinese Academy of Sciences(xbzg-zdsys-202206)the Knowledge Innovation Program of Wuhan-Shuguangthe Hubei Provincial Natu-ral Science Foundation of China(2022CFB792).
文摘Multi-photon three-dimensional(3D)nanoprinting technology,renowned for its 3D processing capability and nano-scale resolution beyond the diffraction limit,has garnered significant attention in the micro/nano-additive manufacturing field.This technology finds widespread applications in optics,biology,and mechanical engineering research.However,its broader adoption in industrial production and applications has been hindered by limitations such as relatively slow processing speed and restricted material formability and functionality.This paper presents the latest advancements in multi-photon 3D nanoprinting,with a focus on analyzing optical methods to enhance the processing speed of scanning and projection techniques.Additionally,it examines issues related to the formability and functionality of commonly used photosensitive materials,including organic polymers,inorganic compounds,and composite materials.In conclusion,this paper offers a comprehensive summary from the perspectives of productivity,cost,materials,and cross-scale processing,along with proposed routes and future directions.
基金supported by Shanghai Collaborative Innovation Project(Grant No.XTCX-KJ-2024-01)the National Natural Science Foundation of China(Grant No.52205493).
文摘Increasing the texture complexity of high-performance surfaces can enhance their antifriction properties by altering their distribution and retention of lubricating oils.When a fluid flows through a fish-scale texture,a lubricating layer is formed,effectively reducing friction.In this study,a bionic fish-scale structure is proposed,and ceramic components are fabricated and analyzed using micro/nano additive-manufacturing technology.First,the effects of various parameters on the antifriction performance of the fish-scale texture under hydrodynamic lubrication conditions are investigated.Then,the pressure distribution of the oil film—including both positive and negative pressures—is simulated by adjusting parameters such as the angleα,ratio of textured area to total surface area,and depth of the fish-scale texture.The results indicate that for a textured area that accounts for 20%of the total surface,texture depth of 150μm,and angleαof 30°,the pressure differential reaches its maximum.Finally,based on the optimized parameters,the designed fish-scale structure is fabricated using micro/nano ceramic three-dimensional-printing technology.Friction and wear tests are conducted on the sintered samples.The experimental results align well with the simulation data,indicating that the structure can reduce the friction coefficient by approximately 15%,thereby significantly improving the antifriction performance.This study provides a valuable reference for the surface engineering of other high-performance functional structures.
