The structural changes brought about in hydrogenated amorphous carbon (a-C:H) by thermal annealing are investigated by photon-induced electron spectroscopy. The material is found to be stable up to T = 100°C. From 100 to 400°C, H effusion is associated with sp3 to sp2 conversion, as revealed by the evolution of the valence states. From 400 to 700°C, the sp2 sites gather into clusters of increasing size, as revealed by the decreasing binding energy (BE) and increasing asymmetry of the C 1s spectrum.
An electron spectroscopy study of a-C :H under thermal annealing
Calliari, Lucia;Filippi, Massimiliano;Gottardi, Gloria;Bensaada Laidani, Nadhira;Anderle, Mariano
2006-01-01
Abstract
The structural changes brought about in hydrogenated amorphous carbon (a-C:H) by thermal annealing are investigated by photon-induced electron spectroscopy. The material is found to be stable up to T = 100°C. From 100 to 400°C, H effusion is associated with sp3 to sp2 conversion, as revealed by the evolution of the valence states. From 400 to 700°C, the sp2 sites gather into clusters of increasing size, as revealed by the decreasing binding energy (BE) and increasing asymmetry of the C 1s spectrum.File in questo prodotto:
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