Seidler Group Research
Our group's research focuses on the development and application of
novel x-ray spectroscopies to problems of basic, applied, and
environmental energy sciences. We have a number of different main thrusts and collaborations, including:
- Charge transfer upon lithiation/delithiation of novel electrode materials for lithium ion batteries. Two projects (with the Cao group in the Materials Science Department at UW
and with the Balasubramnian team at ANL/APS) are aimed at understanding
basic issues of charge transfer in the electrodes, improving battery
performance, and decreasing negative environmental impact and/or health
hazards from materials used in existing commercial technology.
These projects use existing capabilities at the XOR/PNC sector of the Advanced Photon Source and also use the Seidler group's LERIX and miniXS spectrometers.
- Chemical bonding in actinide (5f) systems for improved processing of nuclear fission reactor fuels and wastes:
This collaboration with Steve Conradson and Dave Clark of LANL
makes use of numerous x-ray spectroscopic methods, including the LERIX and miniXS
spectrometers, to better understand chemical bonding in actinide
oxides, nitrides, and related ligand compounds. In addition to
the basic research importance of gaining a detailed insight into the
electronic structure of these strongly-correlated materials, it is
important to note that such information may lead to improved
lanthanide/actinide separations chemistry -- thus resulting in less
expensive and more environmentally friendly processing of nuclear
fission reactor fuels and their waste products.
- X-ray nonlinear effects: The imminent commissioning of the Linac Coherent Light Source (LCLS) at SLAC
will be a watershed event for x-ray science. In addition to
allowing forefront studies on biomolecular structure and the temporal
dynamics of chemical reactions, the LCLS will also be the first light
source with the peak power to stimulate x-ray nonlinear effects.
Our group is funded by the DOE to pursue this basic issue while
also constructing instrumentation to be used more broadly in
collaborations with other teams at the LCLS, especially those focusing
on pump-probe spectroscopies of solid and molecular phases.
- Local electronic structure in poymeric solar cells: We are collaborating with the groups of David Ginger (UW Chemistry) and Christine Lascomb
(UW Materials Science) on studies of the x-ray absorption near edge
structure of new polymer sand polymer/nanoparticle composites for solar
- Local coordination in transition-metal based fuel cell catalysts: We are also performing x-ray emission spectroscopy studies with a teams at LANL and ANL
aiimed at better understanding the local atomic coordination and
electronic structure of new catalysts for fuel cell applications.
- Continued development of novel x-ray spectroscopy instrumentation: We’ve developed both
a major spectrometer for nonresonant inelastic x-ray scattering,
Energy Resolution Inelastic X-ray scattering (LERIX) spectrometer, and
also a new approach to x-ray spectrometer design for x-ray emission
spectroscopy (XES) and resonant inelastic x-ray scattering (RIXS).
For information on LERIX and its many applications see the LERIX page. For our new approach to XES/RIXS see the miniXS page.
In the next
five years, we expect to emphasize studies of nano- and bulk-phase
systems relevant for clean energy, basic questions involving
correlated electron phenomenon in f-electron systems, and continued development of miniXS-style spectrometers. We work closely
with John Rehr’s theory group, and graduate students often have
theory side-projects en route to their dissertation.
Please see the list of publications for a more comprehensive perspective on our work.
Nothing happens in any research group without great students. See the personnel page for more information about our team.