Unraveling Dynamical Motions in Cationic Micelles
Quasielastic Neutron Scattering (QENS) study in various micellar systems performed by us showed two distinct motions namely global and internal motion. Molecular dynamics (MD) simulation results also confirmed the same and further predicted that the internal motion is dominated by the effect of 'hydrophobic glue', which holds the micelle together and is most effective in the middle regions of the chains while the head groups and tails, to a lesser extent. In order to verify this and investigate the selective segmental dynamics, we have carried out QENS study on fully protonated and partially deuterated viz. 1) head group deuterated and 2) tail deuterated Tetra trimethylammonium Bromide (TTAB) micelle using IRIS spectrometer in which both segmental and global dynamics contribute. As the global motion involves both translation as well as rotation of the whole micelle, the effect of them in partially deuterated samples would be different, therefore high resolution data is essential to probe the existing dynamical behavior.
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MUKHOPADHYAY Ramaprosad; Bernhard Frick; GARCIA SAKAI Victoria; JOHNSON Mark Robert; MITRA Subhankur; SEYDEL Tilo and SHARMA Veerendra Kumar. (2014). Unraveling Dynamical Motions in Cationic Micelles. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.9-10-1342
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