California State University, Long Beach
 

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dc.contributor.author Daniela, Cruz en
dc.date.accessioned 2013-06-17T17:14:22Z en
dc.date.available 2013-06-17T17:14:22Z en
dc.date.issued 2013-06-17 en
dc.identifier.uri http://hdl.handle.net/10211.14/36 en
dc.description.abstract Self-assembly of microstructures has become a widely used assembly technique due to its high efficiency and low cost. This methodology depends on the spontaneous formation of lattices, and does not require special instruments. Different approaches have been developed in order to induce the self-assembly interaction of particles. Among them magnetic field induced assembly has advantage in controllability and versatility. Previously we applied a uniform field to magnetic and non-magnetic microspheres dispersed in ferrofluid solution, and changed the ferrofluid concentration as a parameter to realize the assembly of different structures including square, honeycome and kagome lattices. In this work we enhance this approach by adding acoustic field to the system. By combining both magnetic and acoustic fields, large lattices were achieved and new structures such as quasi- 3D, and closed packed super-structured rings were observed. In addition, when we used epoxy to achieve solid boundary, standing waves were generated to assemble particles into regular patterns on the macro-scale while preserving the micro-structures. We also used a pair of piezoelectric transducers and modified their phase difference and frequency to change the assembly position of particles. To our knowledge, this is the first example of multi-scale self-assembly technique by using a combination of acoustic and magnetic fields. en
dc.language.iso en en
dc.subject Electrical Engineering, Mechanical Engineering, Material Science en
dc.title Magnetoacoustic Assembly of Colloidal Alloys en
dc.type Article en


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