NANO-ELECTRONIC MATERIALS

 

Nanowires

Cross Section of a Silicon Nanowire
  • Material reduced in 2 dimensions to create quantum confinement
  • Electronic properties change from bulk material
    • Graphene
  • Carbon atoms arranged in a periodic 2 dimensional structure
    • Nanocube (Pd)

    nanocube with an aspect ratio of ~1
    100 degrees Celcius, 0% ethylene glycol

    Nanobar (Pd)

    nanobar with an aspect ratio of ~2
    100 degres Celsius, 9.1% ethylene glycol

    Nanorod (Pd)

    120 degrees Celsius, 72.7% ethylene glycol

    Ag nanoplates

    Pd-Pt nanoplates (top view)

    <111> orientation,
    epitaxial growth of Pt shells on Pd nanoplates

    Chemical analysis (top view)

    STEM-EDS profile: Pd-Pt core shell

    Chemical Analysis (side view)
    STEM-EDS profile: Pd-Pt core shell
    HRTEM: epitaxial growth of Pt shells on Pd nanoplates
    Pd-Pt alloy star-decahedrong
  • Thermodynamically: Fcc metal nanostructure -- cubooctahedrons with the surface bounded by a mix of both {111} and {100} facets
  • Kinetic control: single crystal nanoplate, nanocube, nanobarand nanorod with {100} and {110} facets
  • Anisotropic nanostructure eveolved into the thermodynamically favored shape during an aging process