Title:
Expanding the Semiconductor Nanowire Design Space
Expanding the Semiconductor Nanowire Design Space
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Author(s)
Filler, Michael A.
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Abstract
Semiconductor nanowires are promising building blocks for a diverse range of next generation
electronic, photonic, and energy conversion devices. The physical properties of these materials, and
nanostructures in general, are intimately connected to their structure, which must be controlled with
atomic-level precision. Unfortunately, the accessible design space remains limited by a reliance on
chemistries that were originally developed for 2-D thin film growth. The 3-D nature of nanowires
requires new strategies with which to manipulate growth processes and engineer structure. This talk
will provide an overview of our recent efforts to advance semiconductor nanowire complexity and
function by expanding the available synthetic “toolkit.” Our experimental approach couples the
real-time in-situ spectroscopic interrogation of nanowire chemistry with post-growth structural
characterization. We connect nanowire crystal structure with the specific chemical bonds present
during synthesis and, in doing so, provide a robust foundation from which to rationally achieve novel
structural motifs. The role of hydrogen as the root cause of well-known phenomena in Si nanowire
growth will be discussed in detail. We subsequently leverage this fundamental knowledge to generate
new types of superstructures with user-defined periodicity.
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Date Issued
2012-08-28
Extent
49:51 minutes
Resource Type
Moving Image
Resource Subtype
Lecture