Abstract
To gain insights into properties of a room-temperature ionic liquid in confined geometry, 1-ethyl-3-methylimidazolium bis[trifluoromethanesulfonyl]imide ([emim][Tf2N]) adspecies interacting with various substrates was investigated as a function of temperature by using time-of-flight secondary ion mass spectrometry. The monolayer of adspecies is incorporated into substrates of porous Si, self-assembled monolayers, and Li[Tf2N] at 180–190 K that is slightly greater than the bulk glass transition temperature, Tg, of [emim][Tf2N]. In contrast to simple glass formers, no surface diffusivity is observed for [emim][Tf2N] in the sub-Tg region. The uptake of [emim][Tf2N] into polymer films is associated with the surface mobility of polymer segments rather than adspecies. The mobility of poly(methyl methacrylate) is not quenched by hydrogen bonds with the substrate, as evidenced by that the uptake onset of [emim][Tf2N] is almost independent of the polymer film thickness.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
