Structure and Structure-related Chemistry of Boron Rich Carbon

Speaker: Linda E. Jones, Ph.D.,
Smith CollegeAbstract: Highly boron rich carbon nanofibers have been synthesized via
the CVD reaction of benzene and boron trichloride. The interest is to
synthesize oxidation resistant carbons that are electronically tunable
and maintain mechanical integrity. Auger and XPS analysis identified
boron concentrations of 18.4 and 14.8 atomic % B, respectively when
depositing at 800 °C for 30 minutes at a total flow rate of 65 cc/min. A
TEM investigation along with EELS was undertaken to assess the location
of the boron in the deposited structures. The nanostructure of the
deposited nanofibers and tubes is inhomogeneous yet; these deposited
materials are well ordered and graphite-like. The d-spacings range from
0.3343 to 0.3397 nm and crystallite sizes are 5 to 20 nm. EELS analysis
revealed that the boron concentrations through the tube diameter are
structure related. The details of the development of structure in these
unique boron rich carbon solids will be given in context with a
discussion of the various structures, chemistry and properties
associated with the many allotropes of carbon.Biography: Linda E. Jones is the Hewlett Professor of Engineering and
Director of the Picker Engineering Program at Smith College. Linda is
deeply committed to the advancement of women and underrepresented
individuals in science, technology and engineering. Her expertise is in
the synthesis, structure and degradation of structural carbon and
carbides used in aerospace and other severe environment applications.
The work in her laboratory on high temperature oxidation and corrosion
of structural ceramics has been extended to the study of volatile
emissions produced during the manufacturing of glass. Dr. Jones has 81
publications in these areas and has given over 100 national and
international presentations. She has been named the American Carbon
Society's Graffin Lecturer. Dr. Jones serves on the American Carbon
Society's executive board. She is actively involved in the European and
Asian Carbon Society. She a Fellow of the American Ceramic Society. She
has edited one book and received 9 Teaching Awards including the State
University of New York's Chancellors Award for Teaching Excellence.
Since 2005, Dr. Jones has been the President, Ceramic Education Council,
American Ceramic Society. In addition, Dr. Jones was also recognized by
the State of New York as a SUNY Research Scholar for her work on high
temperature materials.Host: Urbashi Mitra, ubli@usc.edu, EEB 540, x04667

Location: Hughes Aircraft Electrical Engineering Center (EEB) - 248

Audiences: Everyone Is Invited

Contact: Gerrielyn Ramos