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Related Concept Videos

Self-Locking Screw01:16

Self-Locking Screw

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A square-threaded screw jack is a mechanical device widely used for lifting heavy loads or applying considerable force. One of the key features that can make a screw jack more effective and reliable is its self-locking capability.
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In mechanical engineering, the interaction between a threaded screw shaft and a plate gear involves analyzing the resisting torque on the plate gear that can be overpowered when a specific torsional moment is applied to the shaft. To better comprehend this concept, consider a generic situation with a threaded screw shaft with a given mean radius and lead and a plate gear with a specified mean radius. The coefficient of static friction between the screw and gear is also provided.
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It is essential to understand the difference between chiral and achiral interactions and the implications thereof in optical activity and their applications. Just as our feet, which are chiral, interact uniquely with chiral objects, such as a pair of shoes, but identically with achiral socks, enantiomers of a molecule exhibit different properties only when they interact with other chiral media. An example of a significant implication from this facet is the phenomenon known as optical activity,...
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Optical microscopy uses optic principles to provide detailed images of samples. Antonie van Leeuwenhoek designed the first compound optical microscope in the 17th century to visualize blood cells, bacteria, and yeast cells. In 1830, Joseph Jackson Lister created an essentially modern light microscope. The 20th century saw the development of microscopes with enhanced magnification and resolution.
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Isomerism in Complexes
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Twin-Screw Extrusion Process to Produce Renewable Fiberboards
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Optical screw-wrench for microassembly.

Jannis Köhler1, Sarah Isabelle Ksouri1, Cemal Esen1

  • 1Applied Laser Technologies, Ruhr-Universität Bochum, Universitätsstraße 150, Bochum 44801, Germany.

Microsystems & Nanoengineering
|May 7, 2019
PubMed
Summary

This study presents a novel optical assembly technique for creating complex micro-devices. It uses holographic optical tweezers to screw together microcomponents, enabling advanced micro- and nanotechnologies.

Keywords:
holographic optical tweezermicroassemblymicrofabricationmicrofluidicsoptical assemblyscrew connectionscrew-wrenchtwo-photon polymerization

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Area of Science:

  • Micro- and Nanotechnology
  • Optical Assembly
  • Microsystems Engineering

Background:

  • Miniaturized, functionalized, and integrated devices are crucial for future micro- and nanotechnologies.
  • Existing assembly methods often lack the precision or versatility required for complex microsystems.

Purpose of the Study:

  • To present a novel bottom-up assembly technique for manufacturing complex microsystems using only optical methods.
  • To demonstrate the transfer of screw connections to the micrometer range for assembling microcomponents.
  • To verify the stability and releasability of the assembled micro-joints.

Main Methods:

  • Fabrication of microstructures using micro-stereolithography via two-photon polymerization.
  • Assembly of microcomponents using optical forces in a holographic optical tweezer setup.
  • Design and construction of interlocking microcomponents (screw and nut shapes).

Main Results:

  • Successful transfer of screw connections to the micrometer scale.
  • Demonstration of trapping, moving, and screwing microcomponents together using optical forces.
  • Creation of stable and releasable interlocking micro-joints.
  • Application of the technique to a microfluidic system for fluid manipulation.

Conclusions:

  • The presented optical assembly technique enables the precise manufacturing of complex microsystems.
  • This method allows for the combination of different materials and features, leading to hybrid microsystems.
  • The technique holds significant potential for advancing micro- and nanotechnologies, particularly in microfluidics.