Bottom-up Nanofabrication of Crystalline Structures of Magnetic Nanoparticles


Keywords: , , , , ,

A bottom-up approach to the nanofabrication of three-dimensional (3D) crystalline structures of magnetic core-shell nanoparticles is presented. The approach is based on self-assembly and involves the use of soft-magnetic template elements to guide the assembly in the presence of a uniform bias field. The method is demonstrated using a computational model that predicts particle dynamics during assembly and the final assembled structure. The analysis demonstrates that 3D crystalline superstructures can be assembled within milliseconds and that a variety of crystalline structures can be assembled depending on the template geometry. The feature resolution of the structure can be tailored by controlling the template geometry, particle constituents, core-shell dimensions and the particle volume fraction. Moreover, the assembled structures can be transferred to a substrate to form functional thin films. This nanofabrication method is versatile and broadly applies to arbitrary template geometries and multilayered core-shell particles that have at least one magnetic component. It opens up opportunities for the scalable fabrication of nanostructured materials with unprecedented properties for a broad range of applications.

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Journal: TechConnect Briefs
Volume: 4, Advanced Manufacturing, Electronics and Microsystems: TechConnect Briefs 2015
Published: June 14, 2015
Pages: 359 - 362
Industry sector: Sensors, MEMS, Electronics
Topic: Micro & Bio Fluidics, Lab-on-Chip
ISBN: 978-1-4987-4730-1