Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
Laterally Selective Oxidation of Large-Scale Graphene with Atomic Oxygen. / Kapitanova, Olesya O.; Kataev, Elmar Yu.; Usachov, Dmitry Yu.; Sirotina, Anna P.; Belova, Alina I.; Sezen, Hikmet; Amati, Matteo; Al-Hada, Mohamed; Gregoratti, Luca; Barinov, Alexei; Cho, Hak Dong; Kang, Tae Won; Panin, Gennady N.; Vyalikh, Denis; Itkis, Daniil M.; Yashina, Lada V.
в: Journal of Physical Chemistry C, Том 121, № 50, 21.12.2017, стр. 27915-27922.Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
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TY - JOUR
T1 - Laterally Selective Oxidation of Large-Scale Graphene with Atomic Oxygen
AU - Kapitanova, Olesya O.
AU - Kataev, Elmar Yu.
AU - Usachov, Dmitry Yu.
AU - Sirotina, Anna P.
AU - Belova, Alina I.
AU - Sezen, Hikmet
AU - Amati, Matteo
AU - Al-Hada, Mohamed
AU - Gregoratti, Luca
AU - Barinov, Alexei
AU - Cho, Hak Dong
AU - Kang, Tae Won
AU - Panin, Gennady N.
AU - Vyalikh, Denis
AU - Itkis, Daniil M.
AU - Yashina, Lada V.
PY - 2017/12/21
Y1 - 2017/12/21
N2 - Using X-ray photoemission microscopy, we discovered that oxidation of commercial large-scale graphene on Cu foil, which typically has bilayer islands, by atomic oxygen proceeds with the formation of the specific structures: though relatively mobile epoxy groups are generated uniformly across the surface of single-layer graphene, their concentration is significantly lower for bilayer islands. More oxidized species like carbonyl and lactones are preferably located at the centers of these bilayer islands. Such structures are randomly distributed over the surface with a mean density of about 3 x 106 cm(-2) in our case. Using a set of advanced spectromicroscopy instruments including Raman microscopy, X-ray photoelectron spectroscopy (mu-XPS), Auger electron spectroscopy (nano-AES), and angle-resolved photoelectron spectroscopy (mu-ARPES), we found that the centers of the bilayer islands where the second layer nucleates have a high defect concentration and serve as the active sites for deep oxidation. This information can be potentially useful in developing lateral heterostructures for electronics and optoelectronics based on graphene/graphene oxide heterojunctions
AB - Using X-ray photoemission microscopy, we discovered that oxidation of commercial large-scale graphene on Cu foil, which typically has bilayer islands, by atomic oxygen proceeds with the formation of the specific structures: though relatively mobile epoxy groups are generated uniformly across the surface of single-layer graphene, their concentration is significantly lower for bilayer islands. More oxidized species like carbonyl and lactones are preferably located at the centers of these bilayer islands. Such structures are randomly distributed over the surface with a mean density of about 3 x 106 cm(-2) in our case. Using a set of advanced spectromicroscopy instruments including Raman microscopy, X-ray photoelectron spectroscopy (mu-XPS), Auger electron spectroscopy (nano-AES), and angle-resolved photoelectron spectroscopy (mu-ARPES), we found that the centers of the bilayer islands where the second layer nucleates have a high defect concentration and serve as the active sites for deep oxidation. This information can be potentially useful in developing lateral heterostructures for electronics and optoelectronics based on graphene/graphene oxide heterojunctions
KW - RAMAN-SPECTROSCOPY
KW - REVERSIBLE OXIDATION
KW - OXIDE
KW - MICROSCOPY
KW - REDUCTION
KW - CARBON
KW - SITES
KW - FILMS
U2 - 10.1021/acs.jpcc.7b07840
DO - 10.1021/acs.jpcc.7b07840
M3 - статья
VL - 121
SP - 27915
EP - 27922
JO - Journal of Physical Chemistry C
JF - Journal of Physical Chemistry C
SN - 1932-7447
IS - 50
ER -
ID: 33792493