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SUMMARY:Frontiers of Nanotechnology: Semiconductor Nanowires
DTSTART:20100701T140000
DTSTAMP:20260430T042330Z
UID:c52606e4c6b97722d38b23439a408e7b3604ab442a7b3964af0031b4
CATEGORIES:Conferences - Seminars
DESCRIPTION:Dr. Silvija Gradecak\, Department of Materials Science and Eng
 ineering\, MIT\nNanostructured materials – including nanowires\, nanotub
 es\, and nanocrystals – have unique and\nsize-tunable properties that de
 pend on the precise arrangement of their atomic constituents. These\nnanom
 aterials offer solutions to some of the current challenges in science and 
 engineering\, and\ncould potentially lead to improved understanding of the
  physical world and to discoveries of new\nphenomena. However\, functional
 ity of novel nanomaterials and their impact on society will be\nultimately
  dictated by our understanding and ability to precisely control their stru
 ctural properties\,\nsize uniformity\, and dopant distribution at the atom
 ic level.\nIn this talk\, I will discuss the growth\, doping\, and applica
 tions of III-V nanowires and nanowire\nheterostructures using metalorganic
  chemical vapor deposition\, as well as advanced electron\nmicroscopy tech
 niques for direct correlation of structural and physical properties with h
 igh spatial\nresolution. We have demonstrated that the cathodoluminescence
  (CL) technique\, coupled with\nscanning transmission electron microscopy 
 (STEM)\, effectively bypasses the resolution limit of\nconventional far-fi
 eld photoluminescence spectroscopy and allows direct structure-property\nc
 orrelation on the nanoscale. The CL-STEM optical studies of single nanowir
 e heterostructures with\nspatial resolution of <20 nm will be discussed. F
 inally\, applications of semiconductor nanowires for\nLED and solar cell a
 pplications will be described.
LOCATION:PHL1503
STATUS:CONFIRMED
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