Nanostructures Using Anodic Aluminum Oxide

ORAL

Abstract

We present two fabrication methods for asymmetric mesoscopic dot arrays over macroscopic areas using anodic aluminum oxide templates. In the first approach, metal is deposited at 45$^{\mathrm{o}}$~to the template axis to partially close the pores and produce an elliptical shadow-mask. In the second approach, now underway, nanoimprint lithography on a polymer intermediary layer is followed by reactive ion etching to generate asymmetric pore seeds. Both these techniques are quantified by an analysis of the lateral morphology and lattice of the pores or dots using scanning electron microscopy and a newly developed MATLAB based code (available for free download at http://ischuller.ucsd.edu). The code automatically provides a segmentation of the measured area and the statistics of morphological properties such as area, diameter, and eccentricity, as well as the lattice properties such as number of nearest neighbors, and unbiased angular and radial two point correlation functions. Furthermore, novel user defined statistics can be easily obtained. We will additionally present several applications of these methods to superconducting, ferromagnetic, and organic nanostructures.

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Authors

  • Ilya Valmianski

    Center for Advanced Nanoscience, Department of Physics, University of California, San Diego

  • Carlos Monton

    Center for Advanced Nanoscience, Department of Physics, University of California, San Diego, Department of Physics and Astronomy, University of California San Diego, 9500 Gilman Dr., San Diego, La Jolla, CA 92093, U.S.A, University of California - San Diego

  • Juan Pereiro

    University of California San Diego, Center for Advanced Nanoscience, Department of Physics, University of California, San Diego, University of California - San Diego

  • Ali C. Basaran

    University of California San Diego, Center for Advanced Nanoscience, Department of Physics, University of California, San Diego, University of California - San Diego

  • Ivan K. Schuller

    Department of Physics and Center for Advanced Nanoscience, University of California-San Diego, USA, University of California San Diego, Center for Advanced Nanoscience, Department of Physics, University of California, San Diego, Department of Physics and Astronomy, University of California San Diego, 9500 Gilman Dr., San Diego, La Jolla, CA 92093, U.S.A, University of California, San Diego, University of California - San Diego