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4 March 2016 Optical screw-wrench for interlocking 2PP-microstructures
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Proceedings Volume 9764, Complex Light and Optical Forces X; 97641E (2016)
Event: SPIE OPTO, 2016, San Francisco, California, United States
Two-photon polymerization (2PP) has emerged as a powerful platform for processing three-dimensional microstructures with high resolution. Furthermore, by adding nanoparticles of different materials to the photopolymer the microstructures can be functionalized, e.g. magnetic or electric properties can be adjusted. However, to combine different functions within one microstructure or to manufacture complex microsystems, assembling techniques for multiple 2PP written building blocks are required. In this paper a qualitative approach for assembling microstructures utilizing optical forces is presented. Therefore, screw and nut shaped microstructures are produced by 2PP-technique and screwed together using a holographic optical tweezer (HOT). The interlocking structures are trapped and rotated into each other to cause connection. In this paper the used parameters and possible designs of the interlocking connection are discussed. These findings provide not only the assembling of building blocks to complex microstructures, rather different functionalized 2PP-microstructures can be combined by simply screwing them together with the use of optical forces.
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J. Köhler, G. Zyla, S. I. Ksouri, C. Esen, and A. Ostendorf "Optical screw-wrench for interlocking 2PP-microstructures", Proc. SPIE 9764, Complex Light and Optical Forces X, 97641E (4 March 2016);

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