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"Capturing functional nanostructures & their interfaces"

MATERIALS  SEMINAR
 Department of Materials Science & Engineering
Tuesday February 5, 2019
2:15 – 3:15 ~ SERF 307
Please join us for refreshments at 2:10


"Capturing functional nanostructures & their interfaces"

Speaker: Dr. Katherine Page-Neutron Scattering Division
Oak Ridge National Laboratory-Oak Ridge, TN
Abstract:
It is widely recognized in catalysis, fuel cell and battery chemistry, bio- and geochemical processes, and a host of other functional materials areas that unique properties and characteristics are governed by intricate structural-chemical relationships.  Uncovering the identity and role of locally ordered motifs, including those of surface species and interfaces, remains a challenge because experimental tools to observe materials at atomic length-scales, in relevant operating conditions, or within sufficiently fine time scales are limited.  We present our efforts to apply and extend neutron total scattering and related probes towards capturing the interplay of crystal chemistry and functionality in nano- and nanostructured materials.  Examples include: (1) exploration of internal dipole-dipole ordering in ferroelectric nanocrystals, demonstrating the enhancing effects of cubic particle shape and polar surface termination; (2) investigation of layered manganese oxide structures, where interlayer water molecules, hydrogen bonding, and the nature of vacancies/intercalants strongly impact catalytically and electrochemically active variants; and (3) demonstrated abilities to probe the structure and dynamics of gas-solid interfaces in catalytic materials, where the signatures of interfacial species are enhanced through the use of neutron isotope contrast techniques.  These examples improve understanding of technologically and geologically significant materials and highlight a broader theme of our research aimed at extracting structure models from experimental data with the detail needed to guide and validate modern nanoscale theories, and design new and improved functional materials.  Current challenges and future opportunities in this arena will be discussed.

Biography:
Katharine Page is a Diffraction Instrument Scientist in the Neutron Scattering Division at Oak Ridge National Laboratory (ORNL). She received her PhD in 2008 from the Materials Department at the University of California, Santa Barbara, under the direction of Ram Seshadri and Anthony K. Cheetham. She was a Director's Postdoctoral Fellow and an Instrument Scientist at the Lujan Neutron Scattering Center, Los Alamos National Laboratory, prior to joining ORNL in 2014. Her research is focused on garnering new insights into complex functional materials, both bulk and nano, through advances in structural characterization techniques.  Her research includes efforts to understand and exploit local to long-range ordering in ferroelectric oxides, energy conversion materials, and nanoscale catalysts, among others.  In addition to roles in the current diffraction suite at the Spallation Neutron Source, Katharine is leading the development of the DISCOVER beamline concept, a time-of-flight diffraction and total scattering beamline for in situ and in operando materials discovery at the First Target Station.   She is a 2015 recipient of the Department of Energy (DOE) Early Career Award and she is a co-Principal Investigator in the UNCAGE-ME and IDREAM Centers, both Energy Frontier Research Centers of the DOE. Katharine resides in Oak Ridge, Tennessee, with her husband, Michael Crowell (also of ORNL), and two children, Wriston (age 6) and Abigail (age 1). She is a three-time collegiate national champion in Olympic Weightlifting and she competed in the 2008 Olympic Trials.
 

Tuesday, February 5, 2019 at 2:10pm to 3:15pm

Science & Engineering Building, 307
1414 Circle Dr, Knoxville, TN 37996

Event Type

Lectures & Presentations

Topic

Engineering

Audience

Current Students, Faculty & Staff

Tags

MSE Seminar

Department
Materials Science and Engineering
Hashtag

#PageSeminar

Contact Name

Ashley Cole

Contact Email

acole14@utk.edu

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