X-ray photoelectron spectroscopic studies of carbon-fiber surfaces .21. Comparison of carbon fibers electrochemically oxidized in acid using achromatic and monochromatic XPS

Amoco M40 PAN-based carbon fibers were electrochemically oxidized in a pilot plant system. The changes in the surface of the fibers were monitored using monochromatic x-ray photoelectron spectroscopy (XPS), A parallel experiment using achromatic x-radiation was conducted for comparison. Other graphitic materials were also studied, Decomposition of the fiber due to x-ray exposure could be effectively eliminated by using the monochromator, The use of monochromatic x-radiation produced considerable narrowing in the linewidth of the graphitic peak, This allowed the curve fitting of the component peaks to be performed with significantly greater confidence. (C) 1997 by John Whey & Sons, Ltd.