TY - JOUR
T1 - Small Carbon Nano-Onions
T2 - An Ion Mobility Mass Spectrometric Study
AU - Moriyama, Ryoichi
AU - Wu, Jenna W.J.
AU - Nakano, Motoyoshi
AU - Ohshimo, Keijiro
AU - Misaizu, Fuminori
N1 - Funding Information:
The authors thank Professors Yutaka Takaguchi, Eiji O̅ sawa, Hitoshi Goto, Takeshi Kodama, and Yoji Achiba for their helpful comments. This work was supported by Steel Foundation for Environmental Protection Technology and The Salt Science Research Foundation, Grant Nos. 1418, 1524, and 1621. Theoretical calculations were partly performed using the Research Center for Computational Science, Okazaki, Japan. F.M. acknowledges support from the “Center for Fundamental and Applied Research of Novel Nanocarbon Derivatives, Center for Key Interdisciplinary Research”, and “Creation of International Research Center for Atom-Endohedral Fullerene Nanobiotronics, Program for Key Interdisciplinary Research”, Tohoku University, Japan.
Publisher Copyright:
© 2018 American Chemical Society.
PY - 2018/3/8
Y1 - 2018/3/8
N2 - Structures and charges of nanocarbon cluster ions, Cnz+ (100 ≤ n ≤ 800, z = 1 and 2), have been determined using ion mobility mass spectrometry. For singly charged ions, a compact cluster ion series was observed in addition to monolayer fullerene ions for n = 260-700 continuously. Previous electron microscopic observations indicated that the compact clusters were bilayer fullerenes (nano-onions), in which the inner and outer layers grow from a structure close to [C30@C230]+ at n = 260. The present study also suggests that several combinations of inner and outer layer fullerenes were produced. The results indicated that the interlayer distance depended on different combinations of inner and outer layers and that the observed lower limit of the interlayer distance agreed well with that of graphite (3.35 Å). The upper limit corresponded to bilayer structures in which the number of atoms of the inner layer was constant at about 30, the smallest fullerene size observed in this study. Series of monolayers and compact bilayers of doubly charged ions with cross sections that coincided with those of monocations were observed in nearly the same size region as monocations.
AB - Structures and charges of nanocarbon cluster ions, Cnz+ (100 ≤ n ≤ 800, z = 1 and 2), have been determined using ion mobility mass spectrometry. For singly charged ions, a compact cluster ion series was observed in addition to monolayer fullerene ions for n = 260-700 continuously. Previous electron microscopic observations indicated that the compact clusters were bilayer fullerenes (nano-onions), in which the inner and outer layers grow from a structure close to [C30@C230]+ at n = 260. The present study also suggests that several combinations of inner and outer layer fullerenes were produced. The results indicated that the interlayer distance depended on different combinations of inner and outer layers and that the observed lower limit of the interlayer distance agreed well with that of graphite (3.35 Å). The upper limit corresponded to bilayer structures in which the number of atoms of the inner layer was constant at about 30, the smallest fullerene size observed in this study. Series of monolayers and compact bilayers of doubly charged ions with cross sections that coincided with those of monocations were observed in nearly the same size region as monocations.
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U2 - 10.1021/acs.jpcc.8b00597
DO - 10.1021/acs.jpcc.8b00597
M3 - Article
AN - SCOPUS:85043496071
VL - 122
SP - 5195
EP - 5200
JO - Journal of Physical Chemistry C
JF - Journal of Physical Chemistry C
SN - 1932-7447
IS - 9
ER -