Neutron scattering study of H[sub 2] adsorption in single-walled carbon nanotubes

Ren, Y.; Price, D. L.
November 2001
Applied Physics Letters;11/26/2001, Vol. 79 Issue 22, p3684
Academic Journal
H[sub 2] adsorption in single-walled carbon nanotubes (SWCNTs) has been studied with quasielastic and inelastic neutron scattering. At 80 K, under a H[sub 2] pressure of 110 atm, H[sub 2] molecules gradually condense in the SWCNT sample. After pumping out at 25 K and 20 mTorr, the remaining H[sub 2] molecules show a quantum rotational transition at 14.5±0.1 meV, with a peak width that increases linearly with increasing temperature from 4.2 to 35 K. The H[sub 2] molecules remain in the sample up to 65 K and then start to desorb with increasing temperature. A broad inelastic scattering spectrum from the adsorbed hydrogen is also observed. The time scale of the dynamics is longer than 15 ps even at 200 K. Our results imply that hydrogen molecules are physisorbed in the interstitial tunnels of the SWCNT bundles. © 2001 American Institute of Physics.


Related Articles

  • Evidence for increased chain stiffness of polydiacetylene in solution. Aime, J. P.; Bargain, F.; Fave, J. L.; Rawiso, M.; Schott, M. // Journal of Chemical Physics;11/15/1988, Vol. 89 Issue 10, p6477 

    Evidence has been found of increased chain stiffness of isolated polydiacetylene molecules in solution, associated to an increased side-group interaction, and in at least one case, to an increased and more temperature dependent electronic conjugation length: Bromoform solutions of poly-3BCMU...

  • The application of complex absorbing potentials to an invariant embedding scattering... Huarte-Larranaga, Fermin; Gimenez, Xavier; Lucas, Josep M.; Aguilar, Antonio // Journal of Chemical Physics;8/1/1999, Vol. 111 Issue 5, p1979 

    Reports on the application of complex absorbing potentials to an invariant embedding scattering method. Range of potential energy surfaces covered by the application; Use of the absorbing potential in all cases; Exploration of the reactive processes; Calculation of the cumulative reaction...

  • Energy-dependent cross sections and nonadiabatic reaction dynamics in... Nizkorodov, Sergey A.; Harper, Warren W. // Journal of Chemical Physics;11/8/1999, Vol. 111 Issue 18, p8404 

    Discusses the use of high-sensitivity direct infrared laser absorption methods to investigate quantum state-resolved reactive scattering dynamics in low-density crossed supersonic jets under single collision conditions. Nascent rotational state distributions and relative cross sections for...

  • Optical limiting properties of mono- and multiple-functionalized fullerene derivatives. Riggs, Jason E.; Sun, Ya-Ping // Journal of Chemical Physics;3/1/2000, Vol. 112 Issue 9 

    Optical limiting properties of a series of mono- and multiple-functionalized fullerene derivatives were investigated systematically in room-temperature solutions at different concentrations. The results provide overwhelming experimental evidence for the strong concentration dependence of optical...

  • Measuring Friedel pairs in nanomembranes of GaAs (001). Freitas, Raul; Deneke, Christoph; Malachias, Ângelo; Darin, Gaspar; Morelhão, Sérgio // Journal of Nanoparticle Research;Apr2013, Vol. 15 Issue 4, p1 

    Friedel pairs are susceptible to symmetry breaking in crystals. Under resonant scattering conditions, non-centrosymmetric crystals can give rise to pairs of hkl and $$\bar{h}\bar{k}\bar{l}$$ reflections with different diffracted intensities, which are quantified as an anomalous signal of the...

  • Scattering dynamics in HF+He, Ne, and Ar: State-to-state cross sections, Dopplerimetry, and... Chapman, William B.; Weida, Miles J. // Journal of Chemical Physics;2/8/1997, Vol. 106 Issue 6, p2248 

    Reports on absolute state-to-state cross sections for rotationally inelastic scattering in crossed jets of hydrogen fluoride (HF) with helium, neon and argon at mean center-of-mass collision energies. Probe of column-integrated densities of HF in scattering states in the jet intersection region...

  • On the appearance of resonances in reactive scattering: An experimental study... Wrede, E.; Schnieder, L. // Journal of Chemical Physics;7/15/1997, Vol. 107 Issue 3, p786 

    Investigates the resonance and scattering in a hydrogen exchange reaction at collision energies. Measurement of the angle-velocity distribution of nascent D-atoms; Resolution of the technique allowing the indentification of individual ro-vibrational states of the associated HD product molecule.

  • Hydrogen dynamics in hydro-sodalite Na8 [AlSiO4]6 (OH)2 by inelastic and quasielastic neutron scattering. Buehrer, W.; Felsche, J.; Luger, S. // Journal of Chemical Physics;8/15/1987, Vol. 87 Issue 4, p2316 

    The dynamical properties of hydrogen in the sodalite Na8[AlSiO4]6 (OH)2 were investigated by quasielastic and inelastic neutron scattering techniques. The data were analyzed with a jump model for the hydrogen motion (OH reorientation). The characteristic time of the jump process is 2.1 ps at 295...

  • Electronic and rotational energy transfer in F([sup 2]P[sub 1/2])+H[sub 2] collisions at ultracold temperatures. Krems, Roman; Dalgarno, Alexander // Journal of Chemical Physics;7/1/2002, Vol. 117 Issue 1, p118 

    The dynamics of F(²P[sub ½)+H[sub 2] scattering at ultracold temperatures is studied. It is shown that both the rotational and vibrational excitation of H[sub 2] molecules decrease substantially the efficiency of spin-orbit relaxation in F+H[sub 2] collisions. It is observed that the...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics