Atmospheric adsorption on pristine and nitrogen-doped graphene: doping-dependent, spatially selective
Kolesov EA, Tivanov MS, Korolik O, Kataev E, Xiao F, Kapitanova OO, Cho HD, Kang TW, Panin GN (2020)
Publication Type: Journal article
Publication year: 2020
Journal
Book Volume: 53
Journal Issue: 4
Abstract
Using Raman and photoemission spectroscopy, we probe the atmospheric adsorption on pristine and nitrogen p-doped graphene supported by SiO2/Si. Laser annealing in vacuum led to a pronounced change in Raman spectra parameters, corresponding to a decrease in hole density due to adsorbate removal from the sample surface. We found that the shift inversely correlates with a degree of initial nitrogen doping, and thus less p-type adsorption doping takes place on graphene with a higher density of charge carriers with the same sign. The amount of hole doping required for the absence of atmospheric adsorption doping was found to be p(noad) = (3.87 +/- 0.31) x 10(13) cm(-2) (similar to 2.3% of pyridine-like nitrogen), while the electronic doping required to fully compensate adsorption hole doping was n(equil) = (0.46 +/- 0.12) x 10(13) cm(-2) (similar to 0.2% of graphitic nitrogen). We showed that atmospheric adsorption on pristine graphene increases the spatial charge carrier inhomogeneity; in contrast, the adsorption on nitrogen-doped graphene shows a spatially selective nature and reduces the inhomogeneity of charge carriers. This study is useful for graphene applications which require specific adsorption properties, as well as for taking these properties into account when designing graphene-based nanoelectronic devices.
Authors with CRIS profile
Involved external institutions
Belarusian State University
Belarus (BY)
Dongguk University / 동국대학교
Korea, Republic of (KR)
Lomonosov Moscow State University / Московский государственный университет имени М.В.Ломоносова
Russian Federation (RU)
Belarus (BY)
Dongguk University / 동국대학교
Korea, Republic of (KR)
Lomonosov Moscow State University / Московский государственный университет имени М.В.Ломоносова
Russian Federation (RU)
How to cite
APA:
Kolesov, E.A., Tivanov, M.S., Korolik, O., Kataev, E., Xiao, F., Kapitanova, O.O.,... Panin, G.N. (2020). Atmospheric adsorption on pristine and nitrogen-doped graphene: doping-dependent, spatially selective. Journal of Physics D: Applied Physics, 53(4). https://dx.doi.org/10.1088/1361-6463/ab52d9
MLA:
Kolesov, Egor A., et al. "Atmospheric adsorption on pristine and nitrogen-doped graphene: doping-dependent, spatially selective." Journal of Physics D: Applied Physics 53.4 (2020).
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