Free Access
Microsc. Microanal. Microstruct.
Volume 6, Number 4, August 1995
Page(s) 433 - 440
Microsc. Microanal. Microstruct. 6, 433-440 (1995)
DOI: 10.1051/mmm:1995133

Direct Measurements of the Radiolytic Transformation of Thin Films of Titanium Dioxide using EELS

Peter Rez1, Jon Karl Weiss2, Douglas L. Medlin3 et David G. Howitt4

1  Center for Solid State Sciences and Department of Physics, Arizona State University, Tempe AZ 85287-1704, U.S.A.
2  EMISPEC, 2409 South Rural Road, Tempe AZ 85287-1704, U.S.A.
3  Sandia National Laboratories, Physical Properties of Material Department, Livermore, CA 94551, U.S.A.
4  Department of Chemical Engineering and Materials, Science University of California, Davis, CA 95616, U.S.A.

The reduction of $\rm TiO_2$ (anatase) subjected to high flux electron irradiation ( $\rm\sim 10^8 \ A/m^2$) to titanium monoxide is followed using the evolution of fine structure in the electron energy loss spectrum. Changes in extended fine structure are consistent with changes in interatomic distance and the shift in d band onset clearly shows the transition from insulator to metal.

8250 - Photochemistry and radiation chemistry.
7920K - Other electron surface impact phenomena.
6180M - Channelling, blocking and energy loss of particles.
6180F - Electron and positron effects.
8255 - Radiochemistry.

Key words
electron beam effects -- electron energy loss spectra -- insulating thin films -- radiolysis -- reduction chemical -- titanium compounds -- radiolytic transformation -- thin films -- EELS -- TiO sub 2 -- reduction -- anatase -- high flux electron irradiation -- fine structure -- electron energy loss spectrum -- interatomic distance -- d band onset shift -- insulator to metal transition -- TiO

© EDP Sciences 1995