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  • Ultrasonically assisted deposition of colloidal crystals

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    101833_1.pdf (12.26Mb)
    Author(s)
    Wollmann, Sabine
    Patel, Raj B
    Wixforth, Achim
    Krenner, Hubert J
    Griffith University Author(s)
    Wollmann, Sabine
    Patel, Raj B.
    Year published
    2014
    Metadata
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    Abstract
    Colloidal particles are a versatile physical system which have found uses across a range of applications such as the simulation of crystal kinetics, etch masks for fabrication, and the formation of photonic band-gap structures. Utilization of colloidal particles often requires a means to produce highly ordered, periodic structures. One approach is the use of surface acoustic waves (SAWs) to direct the self-assembly of colloidal particles. Previous demonstrations using standing SAWs were shown to be limited in terms of crystal size and dimensionality. Here, we report a technique to improve the spatial alignment of colloidal ...
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    Colloidal particles are a versatile physical system which have found uses across a range of applications such as the simulation of crystal kinetics, etch masks for fabrication, and the formation of photonic band-gap structures. Utilization of colloidal particles often requires a means to produce highly ordered, periodic structures. One approach is the use of surface acoustic waves (SAWs) to direct the self-assembly of colloidal particles. Previous demonstrations using standing SAWs were shown to be limited in terms of crystal size and dimensionality. Here, we report a technique to improve the spatial alignment of colloidal particles using traveling SAWs. Through control of the radio frequency power, which drives the SAW, we demonstrate enhanced quality and dimensionality of the crystal growth. We show that this technique can be applied to a range of particle sizes in the 孭regime and may hold potential for particles in the sub-孭regime.
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    Journal Title
    Applied Physics Letters
    Volume
    105
    DOI
    https://doi.org/10.1063/1.4891171
    Copyright Statement
    © 2014 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in Applied Physics Letters, Vol. 105, pp. 031113-1-031113-4 and may be found at Http://dx.doi.org/10.1063/1.4891171.
    Subject
    Physical sciences
    Quantum physics not elsewhere classified
    Engineering
    Publication URI
    http://hdl.handle.net/10072/66732
    Collection
    • Journal articles

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