TY - JOUR
T1 - Isotope effect on adsorbed quantum phases
T2 - Diffusion of H2 and D2 in nanoporous carbon
AU - Contescu, Cristian I.
AU - Zhang, Hongxin
AU - Olsen, Raina J.
AU - Mamontov, Eugene
AU - Morris, James R.
AU - Gallego, Nidia C.
PY - 2013/6/7
Y1 - 2013/6/7
N2 - Quasielastic neutron scattering of H2 and D2 in the same nanoporous carbon at 10-40 K demonstrates extreme quantum sieving, with D2 diffusing up to 76 times faster. D2 also shows liquidlike diffusion while H2 exhibits Chudley-Elliott jump diffusion, evidence of their different relationships with the local lattice of adsorption sites due to quantum effects on intermolecular interactions. The onset of diffusion occurs at 22-25 K for H2 and 10-13 K for D 2. At these temperatures, H2 and D2 have identical thermal de Broglie wavelengths that correlate with the dominant pore size.
AB - Quasielastic neutron scattering of H2 and D2 in the same nanoporous carbon at 10-40 K demonstrates extreme quantum sieving, with D2 diffusing up to 76 times faster. D2 also shows liquidlike diffusion while H2 exhibits Chudley-Elliott jump diffusion, evidence of their different relationships with the local lattice of adsorption sites due to quantum effects on intermolecular interactions. The onset of diffusion occurs at 22-25 K for H2 and 10-13 K for D 2. At these temperatures, H2 and D2 have identical thermal de Broglie wavelengths that correlate with the dominant pore size.
UR - http://www.scopus.com/inward/record.url?scp=84878860281&partnerID=8YFLogxK
U2 - 10.1103/PhysRevLett.110.236102
DO - 10.1103/PhysRevLett.110.236102
M3 - Article
AN - SCOPUS:84878860281
SN - 0031-9007
VL - 110
JO - Physical Review Letters
JF - Physical Review Letters
IS - 23
M1 - 236102
ER -