chanelink logo
CHANELINK
Nederlands

Professor Wu Dong's team at the University of Science and Technology of China created a "dancing microrobot" using femtosecond laser composite materials.

806
2023-08-11 14:28:54
Bekijk vertaling
It was learned from the University of Science and Technology of China that the team of Professor Wu Dong of the Micro and Nano Engineering Laboratory of the school proposed a femtosecond laser two-in-one multi-material processing strategy, manufactured a micromechanical joint composed of temperature-sensitive hydrogel and metal nanoparticles, and then developed a multi-joint humanoid micromachine with a variety of deformation modes. The results were published in Nature Communications.
 
In recent years, femtosecond laser two-photon polymerization, as a true 3D processing method with nanometer precision, has been widely used to fabricate various functional microstructures. These microstructures show broad application prospects in the fields of micro-nano optics, microsensors and micromachine systems. However, how to use femtosecond laser to realize composite multi-material processing and further build micro-nano machinery with multi-mode is still a great challenge.
 
According to the researchers, the femtosecond laser two-in-one processing strategy includes the construction of hydrogel joints using asymmetric two-photon polymerization and the deposition of silver nanoparticles by laser reduction in local areas of joints. Among them, asymmetric photopolymerization technology can produce anisotropy in the cross-linking density of the local region of the hydrogel micro-joint, and finally make the bending deformation controllable in direction and Angle. In situ laser reduction deposition can accurately process silver nanoparticles on hydrogel joints. These silver nanoparticles have a strong photothermal conversion effect, which makes the mode switching of multi-joint micromachines exhibit excellent characteristics of ultra-short response time and ultra-low drive power. 
 
As a typical example, eight micro-joints are integrated into a humanoid micromachine. Spatial light modulation technology is then used to achieve a multi-focus beam in 3D space, which in turn precisely stimulates each micro-joint. The cooperative deformation between multiple joints enables the humanoid micromanipulator to complete multiple reconfigurable deformation modes. Finally, the "dancing microrobot" was realized at the micron scale. As a proof of concept, by designing the distribution and deformation direction of the micro-joints, the double-jointed micro-robotic arm can collect multiple micro-particles in the same and different directions.
 
According to the researchers, the femtosecond laser two-in-one machining strategy can construct deformable micro-joints in various local areas of three-dimensional microstructures, and achieve a variety of reconfigurable deformation modes. In the future, micromanipulators with multiple deformation modes will show broad application prospects in micro-cargo collection, microfluidic manipulation and cell manipulation.
 
Source: Science and Technology Daily
Gerelateerde aanbevelingen

  • Optimizing the phase focusing of laser accelerators

    With the help of on-chip accelerator technology, researchers at Stanford University are getting closer to manufacturing a miniature electron accelerator that can have various applications in industrial, medical, and physical research.Scientists have proven that silicon dielectric laser accelerators can now be used to accelerate and limit electrons, thereby producing concentrated high-energy electr...

    2024-02-29
    Bekijk vertaling

  • The scientific research team of Shenzhen University of Technology has discovered a new mechanism of attosecond pulse coherent radiation

    Recently, a team of Professor Ruan Shuangchen and Professor Zhou Cangtao from Shenzhen University of Technology proposed for the first time internationally a physical solution based on the generation of attosecond pulses and subperiodic coherent light shock radiation from a superluminal plasma wake field, and explained a new coherent radiation generation mechanism dominated by collective electron ...

    2023-10-14
    Bekijk vertaling

  • Scientists from the SLAC National Accelerator Laboratory in the United States have launched the world's most powerful X-ray laser

    Scientists at the SLAC National Accelerator Laboratory have launched the world's most powerful X-ray laser, which will be used for in-depth atomic and molecular research.It is a significant upgrade to its predecessor, as its brightness has increased by 10000 times.The upgraded laser facility also uses superconducting accelerator components, allowing it to operate at low temperatures near absolute ...

    2023-11-17
    Bekijk vertaling

  • The wide application of laser plastic welding technology in the field of automobile manufacturing

    With the rapid development of society, people's demands for energy conservation, emission reduction, and safety in automobiles are increasing. Automobile manufacturers are seeking lightweight manufacturing processes for automobiles, changing traditional component packaging processes, and so on. Laser plastic welding technology has emerged, and below is a brief sharing of the application of plastic...

    2024-09-26
    Bekijk vertaling

  • Laser Swing Welding: Principles, Characteristics, and Applications

    Application backgroundLaser swing welding technology was born out of the urgent demand for welding quality and efficiency in modern manufacturing industry. Traditional welding technology has shortcomings in precision, strength, and complex structures, which has led to the rapid application of laser welding in various fields. However, it still has defects such as pores and cracks, and has limitatio...

    2024-12-30
    Bekijk vertaling