V. H. Crespi : Nanotubes @ Penn State Physics

A short section of a carbon nanotube, rotating to show both side view and end view. Credit: Peihong Zhang. Incorporate this image into your website.

Our work on carbon nanotubes covers a very wide range of systems and physical phenomena. In terms of structural properties, carbon nanotubes are one of the most anisotropic materials known: in the axial direction they are exceptionally stiff and strong, while radial deformation and radial sliding are quite easily induced. For a tube of large-enough diameter, the "inflated" state of round cross-section is not the lowest energy state. Instead, the system can collapse into a flat ribbon and thereby capture surface energy of adhesion between the inner faces. In addition, tubes can be functionalized with adatoms or adsorbates that cause substantial changes in their electronic and structural properties. A video presentation of this topic is available. Click on the video image to advance each frame. Wikipedia article on nanotubes.

A view into daily life in research on nanotubes.

Publications

« 1997 · 1998 · 1999 · 2000 · 2002 · All

V. H. Crespi and P. Zhang, "Theory of B₂O and BeB₂ Nanotubes: New Semiconductors and Metals in One Dimension," Phys. Rev. Lett. 89, 056403 (2002) Abstract/Comments

M. Boninsegni, S. Lee and V. H. Crespi, "Helium in one-dimensional nanopores: Free dispersion, localization, and commensurate/incommensurate transitions with nonrigid orbitals," Phys. Rev. Lett. 86, 3360 – 3363 (2002)

B. K. Pradhan, A. Harutyunyan, D. Stojkovic, J. C. Grossman, P. Zhang, M. W. Cole, V. H. Crespi, H. Goto, J. Fujiwara and P. C. Eklund, "Large Cryogenic Storage of Hydrogen in Carbon Nanotubes at Low Pressures," J. Mater. Res. 17, 2209 – 2216 (2002) Abstract/Comments

S. M. Gatica, M. W. Cole, G. Stan, C. Ebner, J. Hartman and V. H. Crespi, "Momentum distribution of helium and hydrogen in nanotubes," Phys. Rev. B 62, 9989 – 9912 (2000)

P. E. Lammert and V. H. Crespi, "Geometrical Perturbation of Graphene Electronic Structure," Phys. Rev. B 61, 7308 – 7311 (2000) Abstract/Comments

G. Stan, M. W. Cole, J. Hartman, V. H. Crespi and S. M. Gatica, "Helium mixtures in nanotube bundles," Phys. Rev. B 61, 7288 (2000) Abstract/Comments

A. Kolmogorov and V. H. Crespi, "The smoothest bearings: interlayer sliding in multiwalled carbon nanotubes," Phys. Rev. Lett. 85, 4727 – 4730 (2000) Abstract/Comments

M. W. Cole, V. H. Crespi, G. Stan, C. Ebner, J. Hartman, S. Moroni and M. Boninsegni, "Anisotropic condensation of helium in nanotube bundles," Phys. Rev. Lett. 84, 3883 – 3886 (2000)

P. E. Lammert and V. H. Crespi, "Gapping by Squashing:Metal-Insulator and Insulator-Metal Transitions in Carbon Nanotubes," Phys. Rev. Lett. 84, 2453 – 2456 (2000) Abstract/Comments

P. Zhang and V. H. Crespi, "Nucleation of carbon nanotubes without pentagonal rings," Phys. Rev. Lett. 83, 1791 – 1794 (1999) Abstract/Comments

V. H. Crespi, "Local Temperature During the Growth of Multiwalled Nanotubes," Phys. Rev. Lett. 82, 2908 – 2910 (1999) Abstract/Comments

L. X. Benedict, V. H. Crespi, N. G. Chopra, A. Zettl, M. L. Cohen and S. G. Louie, "Microscopic determination of the interlayer interaction in graphite," Chem. Phys. Lett. 286, 490 – 496 (1998) Abstract/Comments

A. Vidales, V. H. Crespi and M. W. Cole, "Heat capacity and vibrational spectra of monolayer films adsorbed in nanotubes," Phys. Rev. B 58, 13426 – 13429 (1998) Abstract/Comments

V. H. Crespi, "Relationship between global and local topology in nanotube junctions," Phys. Rev. B 58, 12671 – 12672 (1998) Abstract/Comments

P. Zhang, P. E. Lammert and V. H. Crespi, "Plastic deformations of carbon nanotubes," Phys. Rev. Lett. 81, 5346 – 5349 (1998) Abstract/Comments

V. H. Crespi, A. Rubio and M. L. Cohen, "In-situ bandgap engineering in carbon nanotubes," Phys. Rev. Lett. 79, 2093 – 2096 (1997) Abstract/Comments

V. H. Crespi, L. Chico, L. X. Benedict, S. G. Louie and M. L. Cohen, "Pure-carbon nanoscale devices: nanotube heterojunctions," Phys. Rev. Lett. 76, 971 – 974 (1996) Abstract/Comments

N. G. Chopra, L. X. Benedict, V. H. Crespi, M. L. Cohen, S. G. Louie and A. Zettl, "Fully collapsed carbon nanotubes," Nature 377, 135 – 137 (1995) Abstract/Comments

N. G. Chopra, H. Luyken, K. Cherrey, V. H. Crespi, M. L. Cohen, S. G. Louie and A. Zettl, "Synthesis of BN nanotubes," Science 269, 966 – 968 (1995)

Packard Fellowship, David and Lucile Packard Foundation
Education and Research in Composite Nanotube Systems and Structural Energetics, National Science Foundation CAREER DMR-9876232
Nanoscale Carbon Structural Design, Research Corporation
Nanotube Networks, Petroleum Research Fund of the American Chemical Society
Theory of Gas Adsorption in Carbon Nanostructures, Army Research Office
Control of Nanostructures Via Metal-Carbon Interactions Over Multiple Length, National Science Foundation NIRT DMR-0103585

Any opinions, findings, and conclusions or recommendations expressed in this material are those of the author(s) and do not necessarily reflect the views of the National Science Foundation.

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