An unusual slowdown of fast diffusion in a room temperature

Journal Article · Tue Jan 01 00:00:00 EST 2013 · European Physics Letters

DOI:https://doi.org/10.1209/0295-5075/102/16004· OSTI ID:1080266

Chathoth, ^[1]; Mamontov, Eugene ^[2]; Fulvio, Pasquale F ^[2]; Wang, Xin ^[2]

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1. Oak Ridge National Laboratory (ORNL)
2. ORNL

Using quasielastic neutron scattering in the temperature range from 290 to 350 K, we show that the diffusive motions in a room temperature ionic liquid [H2NC(dma)2][BETI] become faster for a fraction of cations when the liquid is confined in a mesoporous carbon. This applies to both the localized and long-range translational diffusive motions of the highly mobile cations, although the former exhibit an unusual trend of slowing-down as the temperature is increased, until the localized diffusivity is reduced to the bulk ionic liquid value at a temperature of 350 K.

• Research Organization: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Center for Nanophase Materials Sciences (CNMS)
• Sponsoring Organization: USDOE
• DOE Contract Number: DE-AC05-00OR22725
• OSTI ID: 1080266
• Journal Information: European Physics Letters, Vol. 102, Issue 02955075; ISSN 0295--5075
• Country of Publication: United States
• Language: English