Flux engineering to control in-plane crystal and morphological orientation

  1. Get@NRC: Flux engineering to control in-plane crystal and morphological orientation (Opens in a new window)
DOIResolve DOI: http://doi.org/10.1021/cg300469s
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Journal titleCrystal Growth & Design
Pages36613667; # of pages: 7
AbstractWe tailored nanostructured morphology and crystal texture of iron nanocolumns by engineering the inclination and azimuthal directions of the collimated flux characteristic of glancing angle deposition (GLAD). Under continuous substrate rotation, the flux is azimuthally isotropic within one rotation. With large substrate rotation speeds, we can deposit vertical nanocolumns with a faceted, tetrahedral apex, BCC crystal structure and 111 fiber texture. Designing the flux to have an azimuthal 3-fold symmetry, which reflects the symmetry of the tetrahedral apex, allows us to induce both an in-plane and out-of-plane texture (biaxial texture) by evolutionary selection. In-plane crystal orientation is accompanied by a preferential azimuthal nanocolumn orientation, where the sides of tetrahedral apex are directed toward the flux direction. This work demonstrates the flux engineering technique, which can orient in-plane crystal texture and morphology of crystalline nanocolumns on amorphous substrates. This control is a useful addition to vapor–solid, physical self-assembly with the potential to improve the performance of porous thin film architectures as biaxial buffer layers, and in a variety of device applications such as photovoltaics and energy storage.
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AffiliationNational Institute for Nanotechnology; National Research Council Canada
Peer reviewedYes
NPARC number21268939
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Record identifier2851f4d7-c363-4f2c-809d-9146553d410c
Record created2013-11-27
Record modified2016-05-09
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