Bulletin of the American Physical Society
APS March Meeting 2023
Volume 68, Number 3
Las Vegas, Nevada (March 5-10)
Virtual (March 20-22); Time Zone: Pacific Time
Session Q04: Polymer Thin Films and Interfaces
3:00 PM–6:00 PM,
Wednesday, March 8, 2023
Room: Room 127
Sponsoring
Unit:
DPOLY
Chair: Kailong Jin, Arizona State University
Abstract: Q04.00006 : Suppressed Transition and Dynamic self-asembly of ionic superdiscs in cylindrical nanochannels
4:00 PM–4:12 PM
Presenter:
Mohamed Aejaz Kolmangadi
(BAM, Berlin, Germany)
Authors:
Mohamed Aejaz Kolmangadi
(BAM, Berlin, Germany)
Andreas Schoenhals
(BAM Berlin)
For the bulk case, BDS detects two relaxation modes in the crystalline phase, the γ relaxation and the α1 relaxation, and two relaxation modes in the columnar phase, the α2 and α3 relaxation. All relaxation modes slow down for the confined case compared to the bulk. However, a new relaxation mode reflecting the interfacial layer emerges for the 80 and 25 nm. We discuss the possible molecular origins of the different relaxation modes observed. For the bulk ILC, a clear jump of 4 orders of magnitude in the absolute values of DC conductivity occurs at the transition from the plastic crystalline to hexagonal columnar phase, for the confined ILC, this transition is smooth. DC conductivity is reduced for the confined case, except for the 25nm, where the values are similar to the bulk.
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