Self-assembly of micro-particles by electric fields towards optical materials
Permanent URL:
http://hdl.handle.net/2047/D20287828
Fang, Hui (Committee member)
Jung, Yung Joon (Committee member)
Micro-sized core-shell gold/silica particles used in the experiment are synthesized by chemical methods based on Duffs protocol, and the Janus particles are made by coating dielectric polystyrene latex microsphere using microfabrication techniques. The optical properties of polystyrene particles monolayer, half gold coated monolayer, and assembled chain structures are measured by Fourier transform infrared (FTIR) spectroscopy. The specific line features appeared in the FTIR spectrum were also discussed.
The formed chain structures in this work, and the unique FTIR characteristics promise dynamically tunable optical materials by changing the size and the shape of particles, and the parameters of the external electric field (intensity and frequency). More sophisticated structures are possible by introducing the complexity in the electric field pattern. In addition to the possible tunable optical materials, the manipulation and assembly of metallodielectric particles and metallic particles may have application in the field of microfluidic devices and liquid-borne microcircuits.
electric fields
Janus particles
optical materials
self-assembly
tunable
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