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2008 - 2009 Academic Year Colloquium Series
October 23, 2008 - Revealing the
mysteries of water by first-principles approach
When: 3:30 PM
Where: Mendel 154
Refreshments served at 3:00 PM.
Krzysztof Szalewicz, Department of Physics and Astronomy, University of Delaware
April 11, 2008 - A New Look at the
Proton and Neutron
When: 4:30 PM (Follows Sigma Pi Sigma induction ceremony at 4:00 PM)
Where: Mendel 102
Refreshments will be served.
Gerald A. Miller, Department of Physics, University of Washington
Recent electron scattering measurements have revealed unexpected features of the
proton and neutron wave functions. I discuss recent work revealing that the
proton is unlikely to have a spherical shape. Furthermore, the charge density of
the neutron is negative at its center.
2007 - 2008 Academic Year Colloquium Series
September 7, 2007 - Extrinsic and
Intrinsic Magnetism of Carbon Nanotubes Jay Kikkawa Department of Physics &
Astronomy University of Pennsylvania
When: 2:30 PM
Where: Mendel 213
Refreshments at 2:15 (Mendel 354)
Carbon nanotubes are a unique class of macromolecules exhibiting aromaticity,
one dimensionality, a high degree of symmetry, and a diversity of bandgaps.
Physical properties of carbon nanotubes depend on their detailed atomic
structure, and two nanotubes with nearly identical diameters can display
markedly different responses to external stimuli. Magnetic anisotropy is
particularly interesting for aromatic molecules because diamagnetic anisotropy
probes charge delocalization in ring-like conduction paths. In this talk I will
explain how relatively straighforward magnetic alignment experiments on carbon
nanotubes in suspension yield information about both extrinsic and intrinsic
magnetic anisotropies.
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