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Noise-Assisted Crystallization of Opal Films

Authors

  • Worawut Khunsin,

    Corresponding author
    1. Tyndall National Institute, Lee Maltings, Cork, Ireland
    2. Catalan Institute of Nanotechnology (ICN-CIN2), Campus UAB, 08193 Bellaterra (Barcelona), Spain
    • Tyndall National Institute, Lee Maltings, Cork, Ireland
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  • Andreas Amann,

    1. Tyndall National Institute, Lee Maltings, Cork, Ireland
    2. School of Mathematical Sciences, University College Cork, Ireland
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  • Gudrun Kocher-Oberlehner,

    1. Division of Biomedical Engineering, School of Engineering, University of Glasgow, Rankine Building, Oakfield Avenue, Glasgow, G12 8LT, UK
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  • Sergei G. Romanov,

    1. Institute of Optics, Information and Photonics, University of Erlangen-Nuremberg, Günther-Scharowsky-Str. 1, 91058 Erlangen, Germany
    2. Ioffe Physical Technical Institute RAS, 194021, Polithekhnicheskaya ul., 26, St. Petersburg, Russia
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  • Saroj Pullteap,

    1. Department of Mechanical Engineering, Faculty of Engineering and Industrial Technology, Silpakorn University, Nakhon Pathom 73000 Thailand
    2. Université de Toulouse, INP; LASS, CNRS, F-31077 Toulouse, France
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  • Han Cheng Seat,

    1. Université de Toulouse, INP; LASS, CNRS, F-31077 Toulouse, France
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  • Eoin P. O'Reilly,

    1. Tyndall National Institute, Lee Maltings, Cork, Ireland
    2. Department of Physics, University College Cork, Ireland
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  • Rudolf Zentel,

    1. Institute of Organic Chemistry, Johannes Gutenberg University Mainz, Düsbergweg 10-14, D-55099 Mainz, Germany
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  • Clivia M. Sotomayor Torres

    Corresponding author
    1. Catalan Institute of Nanotechnology (ICN-CIN2), Campus UAB, 08193 Bellaterra (Barcelona), Spain
    2. Catalan Institute of Research and Advanced Studies, ICREA, 08010 Barcelona, Spain
    3. Dept. of Physics, UAB, 08193 Bellaterra (Barcelona), Spain
    • Catalan Institute of Nanotechnology (ICN-CIN2), Campus UAB, 08193 Bellaterra (Barcelona), Spain.
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Abstract

An improvement of the crystal quality of opal films self-assembled from polymer spheres in a moving meniscus using the agitation by white noise acoustic vibrations is demonstrated. A tenfold higher ordering of a hexagonal sphere packing in the (111) plane is achieved. This crystallization method, the mechanism of which is described in terms of the stochastic resonance, is a contrast to the widely used approach based on maintaining equilibrium conditions during the crystallization process. The precise quantification of the incremental lattice order improvement as a function of acoustic noise intensity is achieved by calculating the probability of finding an opposite partner for each sphere in the lattice. This method is examined against conventional and established techniques such as Fourier transforms and translational and bond-orientational correlation functions, and its advantages are demonstrated. Rotational symmetry analysis of diffraction resonances in measured and calculated optical transmission spectra as a function of the azimuth lattice orientation are carried out to confirm that the surface ordering translates into the bulk ordering of high index crystal planes, which are most sensitive to disorder.

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