Measurement of the amount of free and bound hydrogen in amorphous carbon
O. I. Kon’kovA. F. Ioffe Physicotechnical Institute, Russian Academy of Sciences, St. PetersburgИ. Н. КапитоновA. F. Ioffe Physicotechnical Institute, Russian Academy of Sciences, St. PetersburgИ. Н. ТрапезниковаA. F. Ioffe Physicotechnical Institute, Russian Academy of Sciences, St. PetersburgE. I. TerukovA. F. Ioffe Physicotechnical Institute, Russian Academy of Sciences, St. Petersburg
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The effusion of hydrogen and other gases from an amorphous carbon a-C:H film annealed at temperatures of 100–1000°C was studied. A direct method was used to determine the amount of hydrogen in the material as 26 at.%. The amount of free hydrogen was determined as 4 at.%. The temperature curve for the release of free hydrogen gas has a maximum at 400 °C. A broad hydrogen effusion peak was observed above 400 °C. The amount of hydrogen released by breaking of weak C-H bonds was determined as 10 at.% and that released by breaking of strong C-H bonds was determined as 12 at.%.
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