KFU. Card publication. Water Enrichment/Depletion of Amorphous Carbon Coatings Probed by Temperature-Dependent Dc Electrical Conductivity and Raman Scattering

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WATER ENRICHMENT/DEPLETION OF AMORPHOUS CARBON COATINGS PROBED BY TEMPERATURE-DEPENDENT DC ELECTRICAL CONDUCTIVITY AND RAMAN SCATTERING

Form of presentation

Articles in international journals and collections

Year of publication

2021

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Authors, employees of KFU

Fishman Aleksandr Izrailovich, author

Kharincev Sergey Sergeevich, author

Authors, postgraduates KFU

Saparina Svetlana Vyacheslavovna, postgraduate kfu

Bibliographic description in the original language

Saparina S.V. Water Enrichment/Depletion of Amorphous Carbon Coatings Probed by Temperature-Dependent Dc Electrical Conductivity and Raman Scattering / S.V.Saparina, A.I.Fishman, A.A.Stolov, J.Li, S.S. Kharintsev // Applied Surface Science.-2021.-N28. -151052

Annotation

Applied Surface Science

Keywords

amorphous carbonoptical fiberchemical dopingtemperature-dependent Raman spectroscopydc conductivity hysteresiswater dissociative absorption

The name of the journal

Applied Surface Science

URL

https://www.sciencedirect.com/science/article/abs/pii/S0169433221021097

Please use this ID to quote from or refer to the card

https://repository.kpfu.ru/eng/?p_id=255717&p_lang=2

Full metadata record

Field DC	Value	Language
dc.contributor.author	Fishman Aleksandr Izrailovich	ru_RU
dc.contributor.author	Kharincev Sergey Sergeevich	ru_RU
dc.contributor.author	Saparina Svetlana Vyacheslavovna	ru_RU
dc.date.accessioned	2021-01-01T00:00:00Z	ru_RU
dc.date.available	2021-01-01T00:00:00Z	ru_RU
dc.date.issued	2021	ru_RU
dc.identifier.citation	Saparina S.V. Water Enrichment/Depletion of Amorphous Carbon Coatings Probed by Temperature-Dependent Dc Electrical Conductivity and Raman Scattering / S.V.Saparina, A.I.Fishman, A.A.Stolov, J.Li, S.S. Kharintsev // Applied Surface Science.-2021.-N28. -151052	ru_RU
dc.identifier.uri	https://repository.kpfu.ru/eng/?p_id=255717&p_lang=2	ru_RU
dc.description.abstract	Applied Surface Science	ru_RU
dc.description.abstract	Amorphous carbon (a-C) is an appealing disordered multi-phase material widely used as a cost-effective barrier coating (10-100 nm thick) for silica optical fibers to protect them from harsh environments. Those coatings prevent strength degradation of the optical fibers by moisture and, also block hydrogen diffusion into the fiber. In this paper, we experimentally study the in situ temperature-dependent dc electrical conductivity and Raman scattering of dried/wetted a-C coatings under multiple heating/cooling cycles within the range of 40-120?C. At temperatures of above 80?C, we observe hysteresis in both the dc electrical resistance and the Raman scattering intensity. One of the mechanisms is related to the escape of intercalated (or spatially confined) water from the a-C coating, causing the resistance decrease due to a closing of the bandgap. The opposite is observed when some water molecules experience dissociative absorption at the edge and basal defects that may be decorated with C-H, COOH/C-OH and C-O-C/C=O functional groups. The content of water within the a-C coating is quantified through relative contributions of the water and edge defect related Raman bands. This study expands our knowledge about a-C ultrathin films, originally designed as barrier coatings, towards promising ultracompact humidity sensors and next-generation adsorbents.	ru_RU
dc.language.iso	ru	ru_RU
dc.subject		ru_RU
dc.title	Water Enrichment/Depletion of Amorphous Carbon Coatings Probed by Temperature-Dependent Dc Electrical Conductivity and Raman Scattering	ru_RU
dc.type	Articles in international journals and collections	ru_RU