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Search Publications by: Madhusudan Tyagi (Assoc)

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Displaying 26 - 50 of 120

Two Inherent Crossovers of the Diffusion Process in Glass-Forming Liquids

October 5, 2018
Author(s)
Maiko Kofu, Antonio Faraone, Madhu Sudan Tyagi, Michihiro Nagao, Osamu Yamamuro
We report on incoherent quasielastic neutron scattering measurements examining a self-diffusion process in two types of glass-forming liquids, a molecular liquid (3-methylpentane) and an ionic liquid (1-butyl-3-methylimidazolium bis

Multimodality of Structural, Electrical, and Gravimetric Responses of Intercalated MXenes to Water

November 28, 2017
Author(s)
Eric S. Muckley, Michael Naguib, Hsiu-Wen Wang, Lukas Vlcek, Naresh C. Osti, Robert L. Sacci, Xiahan Sang, Raymond R. Unocic, Yu Xie, Madhu Sudan Tyagi, Eugene Mamontov, Katharine L. Page, Paul R. C. Kent, Jagjit Nanda, Ilia N. Ivanov
Understanding of structural, electrical and gravimetric peculiarities of water vapor interaction with ion-intercalated MXenes used to design of a multimodal humidity sensor. Neutron scattering coupled to molecular dynamics and ab initio calculations showed

Dynamical Transition of Collective Motions in Dry Proteins

July 28, 2017
Author(s)
Zhuo Liu, Juan Huang, Madhu Sudan Tyagi, Hugh O'Neill, Qiu Zhang, Eugene Mamontov, NItin Jain, Yujie Wang, Jie Zhang, Jeremy C. Smith, Liang Hong
Water is widely assumed to be essential for protein dynamics and function. In particular, the well-documented "dynamical" transition at 200 K detected in hydrogenated proteins by incoherent neutron scattering, at which the protein changes from a rigid, non

Nanoscopic Dynamics of Bicontinuous Microemulsions: Effect of Membrane-Associated Protein

July 28, 2017
Author(s)
V. K. Sharma, Douglas G. Hayes, Volker S. Urban, Hugh M. O'Neill, Madhu Sudan Tyagi, Eugene Mamontov
Bicontinous Microemulsions (BυE)generally consist of nanodomains formed by surfactant in a mixture of water and oil at nearly equal proportions and are potential candidates for the solubilization and purification of membrane proteins. Here we present the

Evidence of Molecular Hydrogen Trapped in Two-Dimensional Layered Titanium Carbide-Based MXene

July 17, 2017
Author(s)
Naresh C. Osti, Michael Naguib, Madhu Sudan Tyagi, Yury Gogotsi, Alexander I. Kolesnikov, Eugene Mamontov
The presence of molecular hydrogen at ambient conditions in a MXene (Ti 3C 2T x)) material is revealed by inelastic and elastic neutron scattering. Inelastic neutron scattering spectrum measured at 5 K shows a peak at 14.6 meV, providing a clear indication

Short Time and Structural Dynamics in Polypropylene Glycol Nanocomposite

June 1, 2017
Author(s)
Madhusudan Tyagi, R. Casalini, C. M. Roland
The dynamics of polypropylene glycol, both neat and attached to silica nanoparticles, were investigated using elastic neutron backscattering and dielectric spectroscopy. The mean square displacement measured by the former is suppressed by the particles at

On the Structure and Dynamics of Water Associated with Single-Supported Zwitterionic and Anionic Membranes

March 28, 2017
Author(s)
A. Miskowiec, Z. N. Buck, F. Y. Hansen, H. Kaiser, H. Taub, Madhu Sudan Tyagi, S. O. Diallo, Eugene Mamontov, K. W. Herwig
We have used high-resolution quasielastic neutron scattering (QENS) to investigate the dynamics of water molecules (time scale of motion 10 u-11-10 -9 s) in proximity to singe-supported bilayers of the zwitterionic lipid DMPC (1,2-dimyristoly-sn-glycero-3

Water Dynamics in Rigid Ionomer Networks

December 8, 2016
Author(s)
N. C. Osti, T.N. Etampawala, U.M. Shrestha, D. Aryal, Madhu Sudan Tyagi, S. O. Diallo, E. Mamontov, C. J. Cornelius, D. Perahia
The dynamics of water within ionic polymer networks formed by sulfonated poly(phenylene) (SPP), as revealed by quasi-elastic elastic neutron scattering (QENS), is presented. These polymers are distinguished from other ionic macromolecules by their rigidity