The University of Texas at Dallas

Nano & Beyond Lab

Nano-Characterization of Low Dimensional Materials

Cross Section of a Silicon Nanowire: Material reduced in 2 dimensions to create quantum confinement

Electronic properties change from bulk materia.

Graphene: Carbon atoms arranged in a periodic 2 dimensional structure

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

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