High-Pressure Optical Microspectroscopy Study on Single-Walled Carbon Nanotubes Encapsulating C60
High-Pressure Optical Microspectroscopy Study on Single-Walled Carbon Nanotubes Encapsulating C60
复制标题
封装C60的单壁碳纳米管的高压光学显微光谱研究
DOI:
10.1021/jp405639t
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发表时间:
2013
影响因子:
3.7
通讯作者:
C.A. Kuntscher
中科院分区:
文献类型:
--
作者:
B. Anis;F. Boerrnert;M.H. Ruemmeli;C.A. Kuntscher
The high-pressure behavior of single-walled carbon nanotubes (SWCNTs) filled with C60molecules, so-called C60@SWCNT peapods, has been investigated by optical spectroscopy using nitrogen and argon as pressure transmitting media. Peapods with a high filling ratio were prepared by the sublimation method and characterized by high-resolution transmission electron microscopy. Optical transmission measurements under high pressure were conducted on films of SWCNTs and C60@SWCNT peapods. As with SWCNTs, the absorption bands observed for peapods exhibit a red-shift under pressure. The relative energy shifts of the optical transitions under pressure are higher than those for empty SWCNTs, demonstrating enhanced hybridization and/or symmetry breaking effects. We find an anomaly in the pressure-induced shifts of the optical transitions atPc1≈ 6.5 GPa (Pc1≈ 5.5 GPa) when using nitrogen (argon) as pressure transmitting medium. The anomaly signals the deformation of the nanotube from circular to an oval shape. The value ofPc1is in good agreement with theoretical predictions of the pressure-induced deformation for highly filled peapods with similar average diameter. A plateau in the pressure-induced shifts with an onset atPc2= 12–13 GPa indicates a saturation of the pressure-induced effects above this critical pressure.
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DOI:
10.1002/pssb.201100109
发表时间:
2011-11
期刊:
physica status solidi (b)
影响因子:
--
作者:
C. Kuntscher;A. Abouelsayed;Á. Botos;Á. Pekker;K. Kamarás
通讯作者:
C. Kuntscher;A. Abouelsayed;Á. Botos;Á. Pekker;K. Kamarás
影响因子:
2
作者:
F. Börrnert;A. Bachmatiuk;S. Gorantla;D. Wolf;A. Lubk;B. Büchner;M. Rümmeli
通讯作者:
M. Rümmeli
DOI:
--
发表时间:
2008
期刊:
影响因子:
--
作者:
G. Liu;X. Wang;J. Chen;H. Lu
通讯作者:
H. Lu
DOI:
--
发表时间:
2011
期刊:
J.Phys.Chem.C
影响因子:
--
作者:
A.Aguiar;E.Barros;R.Capaz;A.Souza Filho;P.Freire;J.Filho;D.Machon;C.Caillier;Y.A.Kim;H.Muramatsu;M.Endo;A.San-Miguel
通讯作者:
A.San-Miguel
影响因子:
3.7
作者:
Chorro, M.;Rols, S.;Kataura, H.
通讯作者:
Kataura, H.