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Cecil L. Brown Lectureship 2011
Oct 4, 2011
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The biennial Cecil
L. Brown Lectureship was established by NJ-ACS in 1969 to bring a
distinguished chemist to a local university in the North Jersey
area. Past recipients of this lectureship include seven Nobel
laureates as well as many other towering figures in chemistry.
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Past Recipients
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2011 Louis Brus
2009 Robert Langer
2006 Robin Hochstrasser
1998 Ronald Breslow
1996 Peter B. Dervan
1994 Dudley Herschbach
1992 Kyriacos Nicolaou
1990 Joseph Laskowski
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1988 Paul Bartlett
1986 Sir John Vane
1984 Alexander Rich
1982 Herbert C. Brown
1980 Melvin Calvin
1979 Leo Sternbach
1978 Robert Lawrence & Kurt Frisch
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1976 Max Tischler -- Fall
1976 James Roth -- Spring
1975 Anthony M. Trozzolo
1974 Burt Christensen
1973 Linus Pauling
1972 Robert Reid
1970 Vladimir Prelog
1969 Paul Flory
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The 2011 Cecil L. Brown Lecture will be held at 3:00 pm on Tuesday, October 4, 2011 at the
Fiber Optics Auditorium on the Busch Campus of Rutgers University, Piscataway NJ, followed by a reception.
[ details ]
The 2011 Distinguished Lecturer is
Professor Louis Brus,
Institute Professor at Columbia University.
Professor Brus
has a BA from Rice University and a PhD from
Columbia University, both in Chemical Physics. As a Lieutenant in
the U. S. Navy, he worked in the solid state and chemistry divisions
of the Naval Research Laboratory in Washington DC. In 1973 he joined
the research area of Bell Laboratories in Murray Hill, NJ, where
he became Distinguished Member of Technical Staff. He returned to
Columbia in 1996, where he is now S. L. Mitchill Professor of
Chemistry. He is a member of the US National Academy of Sciences,
and in 1998 was the Chairman of the Board of Trustees of the Gordon
Conferences. He was originally trained in gas phase spectroscopy
and kinetics. In the 1980s he explored basic ideas and colloidal
methods for semiconductor nanocrystals (Qdots) that exhibit quantum
size effects. His present interests include carbon nanotubes and
graphene, chemical applications of local electromagnetic fields,
and solar energy nanoscience. He has received the APS Langmuir
Prize, the ACS Chemistry of Materials Prize, the OSA Wood Prize,
the inaugural Kavli Prize in Nanoscience, and the NAS Prize in the
Chemical Sciences. For further details of Professor
Brus's work, visit
www.columbia.edu/cu/chemistry/groups/brus
“Electron Correlation in Carbon Nanotubes and Graphene”
by Professor Louis Brus
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Abstract:
We explore the fundamental nature and dynamics of excited electronic
states in graphitic carbon materials. In semiconducting carbon
nanotubes, near-infrared two photon luminescence excitation spectra
quantitatively reveal very-strongly-bound exciton excited states.
Electron-electron interactions are compared among CdSe nanocrystals,
graphene, and carbon nanotubes. The independent contributions of
screening and dimensionality are analyzed. Electronic and vibrational
degrees of freedom are significantly coupled in graphene. The
metallic versus molecular nature of single sheet graphene is strongly
affected by charge transfer doping by adsorbed molecular species.
Asymmetric doping in bilayer graphene can open a band gap, as
revealed by the Raman spectra. Optical absorption bleaching and
Raman Fano lineshapes are observed in few layer graphenes very
highly doped by adsorbed alkalis.
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