Journal
SENSORS AND ACTUATORS A-PHYSICAL
Volume 127, Issue 2, Pages 310-315Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.sna.2006.01.025
Keywords
out-of-plane structures; hinged structures; multi-step sequential assembly; magnetic self-assembly
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We provide the design method of multi-step magnetic self-assembly using ferromagnetic-hinged structures. The process uses the magnetostatic torque generated by an external magnetic field perpendicular to the substrate to lift hinged structures. Hinged structure is composed of a rigid plate connected by elastic hinges to one side of a substrate. If hinged structures are raised in sequential order, it is possible to assemble like Japanese origami complex three-dimensional structures. In our previous study, we found that a dimensionless factor that depends on its shape determines the sensitivity of the hinged microstructures to a magnetic field. This factor can be used as a criterion in designing a process for sequential batch self-assembly, because the factor indicates the differences in the sensitivity. In this study, we designed multi-step sequential assembly by using the dimensionless factor. Four-step sequential batch assembly was demonstrated using this method. This method will be useful for optical systems, which consist of many complex three-dimensional structures. (c) 2006 Elsevier B.V. All rights reserved.
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