The effect of quasi-free graphene layer on the electrical transport properties of sandwich-like graphene / Co nanoparticles / graphene structure

Bayev, V.; Rybin, M.; Svito, I.; Przewo´znik, J.; Kapusta, C.; Kasiuk, J.; Vorobyova, S.; Konakov, A.; Obraztsova, E.

Статья опубликована в высокорейтинговом журнале

Информация о цитировании статьи получена из Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 4 марта 2022 г.

Авторы: Bayev V., Rybin M., Svito I., Przewo´znik J., Kapusta Cz, Kasiuk J., Vorobyova S., Konakov A., Obraztsova E.
Журнал: Applied Surface Science
Том: 579
Год издания: 2022
Издательство: Elsevier BV
Местоположение издательства: Netherlands
Первая страница: 152119-1
Последняя страница: 152119-8
DOI: 10.1016/j.apsusc.2021.152119
Аннотация: The paper reports on the charge transport in the sandwich-like graphene / Co nanoparticles / graphene structure (G/CoNPs/G). It is fabricated by combining the electrochemical deposition of Co nanoparticles onto a single layer CVD graphene and their capping with another graphene layer. The isolated semi-spherical, surface oxidized Co NPs of 250 nm in diameter serve as a support for the top graphene layer and provide its suspended state confirmed by atomic force microscopy revealing periodic ripples on its surface. A high optical transparency of 92.4% is found for the G/CoNPs/G sandwich. The observed twofold reduction in the sheet resistance with a ~ 1.5 times increase in the positive magnetoresistive effect for G/CoNPs/G compared to the pristine graphene is attributed to the suppression of carrier scattering due to the substrate. From the Hall effect measurements, a predominant role of the top graphene layer in the charge transport in G/CoNPs/G is established, with a significantly increased carrier mobility μ~1800 cm2/(V⋅s). An elastic intervalley scattering length estimated from the magnetoresistance results is found to be three times increased in G/CoNPs/G, indicating that the top graphene layer is almost unaffected by the substrate. The proposed technology looks promising for possible optoelectronic and magneto-optical applications.
Добавил в систему: Образцова Елена Дмитриевна

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The effect of quasi-free graphene layer on the electrical transport properties of sandwich-like graphene / Co nanoparticles / graphene structureстатья

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