nl404377v_si_001.pdf (1.12 MB)
Directed Branch Growth in Aligned Nanowire Arrays
journal contribution
posted on 2014-04-09, 00:00 authored by Allan L. Beaudry, Joshua
M. LaForge, Ryan T. Tucker, Jason
B. Sorge, Nicholas L. Adamski, Peng Li, Michael T. Taschuk, Michael J. BrettBranch
growth is directed along two, three, or four in-plane directions
in vertically aligned nanowire arrays using vapor–liquid–solid
glancing angle deposition (VLS-GLAD) flux engineering. In this work,
a dynamically controlled collimated vapor flux guides branch placement
during the self-catalyzed epitaxial growth of branched indium tin
oxide nanowire arrays. The flux is positioned to grow branches on
select nanowire facets, enabling fabrication of aligned nanotree arrays
with L-, T-, or X-branching. In addition, a flux motion algorithm
is designed to selectively elongate branches along one in-plane axis.
Nanotrees are found to be aligned across large areas by X-ray diffraction
pole figure analysis and through branch length and orientation measurements
collected over 140 μm2 from scanning electron microscopy
images for each array. The pathway to guided assembly of nanowire
architectures with controlled interconnectivity in three-dimensions
using VLS-GLAD is discussed.
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nanowire facetsbranch lengthnanowire architecturesorientation measurementsscanning electron microscopy imagesBranch Growthindium tin oxide nanowire arraysangle depositionnanotree arraysnanowire arraysvapor flux guides branch placementflux motion algorithmflux engineering140 μ m 2Aligned Nanowire ArraysBranch growth
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