English

New research on achieving femtosecond laser machining of multi joint micromachines

1010
2023-09-15 14:06:09
See translation

The team of Wu Dong, professor of the Micro/Nano Engineering Laboratory of University of Science and Technology of China, proposed a processing strategy of femtosecond laser two in one writing into multiple materials, manufactured a micromechanical joint composed of temperature sensitive hydrogel and metal nanoparticles, and then developed a multi joint humanoid micromachine with multiple deformation modes (>10). The relevant research results were recently published in Nature Communications.

In recent years, femtosecond laser two-photon polymerization technology has been widely used as a true three-dimensional machining method with nano precision to manufacture various functional microstructures. These microstructures exhibit broad application prospects in fields such as micro nano optics, micro sensors, and micro machine systems. However, it is still highly challenging to utilize femtosecond lasers to achieve composite multi material processing and further construct multimodal micro/nano machinery.

Femtosecond laser two in one processing strategy includes the use of asymmetric two-photon polymerization to build hydrogel joints, and laser reduction deposition of silver nanoparticles in the local area of the joint. Among them, the asymmetric photopolymerization technology makes the cross-linking density of the local area of the hydrogel micro joint produce anisotropy, and finally enables it to realize the bending deformation with controllable 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 enables the mode switching of multi joint micromachines to exhibit excellent characteristics such as ultra-short response time (30 milliseconds) and ultra-low driving power (<10 milliwatts).

As a typical example, 8 micro joints are integrated into a humanoid micromachine. Subsequently, researchers utilized spatial light modulation technology to achieve multifocal beams in 3D space, thereby accurately stimulating each micro joint. The collaborative deformation between multiple joints promotes the completion of multiple reconfigurable deformation modes in humanoid micro robotic arms. Finally, at the micrometer scale, humanoid micromachines "danced".

In concept validation, by designing the distribution and deformation direction of micro joints, a dual joint micro robotic arm can collect multiple micro particles in the same and opposite directions. In summary, the femtosecond laser two in one machining strategy can construct deformable micro joints in various local areas of three-dimensional microstructures, achieving various reconfigurable deformation modes.
Researchers have introduced that micro robotic arms with multiple deformation modes will exhibit broad application prospects in micro cargo collection, microfluidic manipulation, and cell manipulation.

Source: Micro and Nano Engineering Laboratory, University of Science and Technology of China

Related Recommendations
  • Entangled photon pairs generated by quantum light sources can be used for quantum computing and cryptography

    A new device composed of semiconductor rings generates pairs of entangled photons, which can be used in photon quantum processors.Quantum light sources generate entangled photon pairs, which can be used in quantum computing and cryptography. A new experiment has demonstrated a quantum light source made from semiconductor gallium nitride. This material provides a multifunctional platform for devic...

    2024-03-30
    See translation
  • Han's Laser's net profit in the third quarter decreased by 45.37% year-on-year

    Recently, Han's Laser released a third quarter report, stating that the company achieved a revenue of 3.301 billion yuan in the third quarter, a year-on-year decrease of 8.96% (after adjustment); The net profit attributable to shareholders of the listed company was 209 million yuan, a year-on-year decrease of 45.37% (after adjustment).During the reporting period, the company's operating profit, to...

    2023-10-25
    See translation
  • Scientists demonstrate powerful UV-visible infrared full-spectrum laser

    Figure: a. Schematic diagram of the HCF-LN-CPPLN experimental setup. W. CaF? Window M, mirror.b. The bright white light circular spots emitted by the CPPLN sample.c. The first-order diffraction beam of B displays a colorful rainbow pattern from purple to red.d. The HCF-LN-CPPLN module generates normalized spectra of the output full spectrum laser signal through the second NL HHG and third NL SPM e...

    2023-08-25
    See translation
  • Laser manufacturer DIT signs KRW 20.52 billion agreement

    Recently, DIT, a well-known semiconductor and display equipment manufacturer in South Korea, announced that the company has signed an agreement worth 20.52 billion Korean won to supply wafer processing equipment to SK Hynix. After the announcement, DIT's stock price rose for five consecutive days, entering the 16000 Korean won range. Then on the 22nd, it rose 2580 Korean won from the previous day'...

    02-15
    See translation
  • Laser link between European Space Agency containers and space

    The latest expansion of the European Space Agency's laboratory is essentially portable: this European Space Agency's mobile optical ground station is housed in a standard container and can be transported throughout Europe as needed for laser based optical communication with satellites - including NASA's Psyche mission, in space millions of kilometers away.The station has officially become a part o...

    2024-02-12
    See translation