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Search Publications by: Madhusudan Tyagi (Assoc)

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Displaying 1 - 25 of 67

Quasi-Elastic Neutron Scattering on Bimodal Dynamics in Molecular Solutions of Cellulose

June 23, 2025
Author(s)
Tao Xiong, Madhu Sudan Tyagi, Wei Zhou, Hongyu Guo, Robert Briber, Howard Wang
Local dynamics in molecular solutions of cellulose have been studied using quasi-elastic neutron scattering on ternary mixtures of microcrystalline cellulose, ionic liquid 1-ethyl-3-methyl-imidazolium acetate and co-solvent dimethylformamide. Two distinct

Correlating the Diffusion of Water in Model Polyamides with Controlled Crosslink Densities to the Performance in Reverse Osmosis Membranes for Desalination

April 18, 2023
Author(s)
Velencia Witherspoon, Kanae Ito, Chad R. Snyder, Madhusudan (Madhu) Tyagi, Tyler Martin, Peter Beaucage, Ryan Nieuwendaal, Richard Vallery, David Gidley, Jeffrey Wilbur, Dean Welsh, Christopher Stafford, Christopher Soles
To elucidate robust design cues for improving the active polyamide (PA) filtration layers in reverse osmosis (RO) membrane for desalination, we systematically reduce the cross-link density of a PA network based on m-phenylene diamine by substituting a

All-Temperature Zinc Batteries with High-Entropy Aqueous Electrolyte

January 9, 2023
Author(s)
Chongyin Yang, Jiale Xia, Chunyu Cui, Travis P. Pollard, Jenel Vatamanu, Antonio Faraone, Joseph Dura, Madhu Sudan N. Tyagi, Alex Kattan, Elijah Thimsen, Jijian Xu, Wentao Song, Enyuan Hu, Xiao Ji, Singyuk Hou, Xiyue Zhang, Michael S. Ding, Sooyeon Hwang, Dong Su, Yang Ren, Xiao-Qing Yang, Howard Wang, Oleg Borodin, Chunsheng Wang
Solvent-in-salt electrolytes have revolutionized both aqueous and non-aqueous batteries by extending the electrochemical stability window 1,2,3 and enabling new battery chemisties 4-6. However, the presence of both anions and solvent in the cation

Relative effects of polymer composition and sample preparation on glass dynamics

August 17, 2022
Author(s)
Christopher Soles, Amanda L. Forster, Katherine Evans, Madhusudan (Madhu) Tyagi, Robert M. Elder, Timothy Sirk, Joseph Dennis, Kanae Ito, Osama Yamamuro, Hiroshi Akiba
Modern design of common adhesives, composites and polymeric parts makes use of polymer glasses that are stiff enough to maintain their shape under a high stress while still maintaining a ductile behavior after the yield point. Typically, material

Why Polymer Glasses with Enhanced Sub-nanosecond Relaxation are Tougher

February 12, 2021
Author(s)
Christopher Soles, Adam B. Burns, Kanae N. Ito, Jack Douglas, Robert Dimeo, Madhu Sudan Tyagi, Jingsheng Wu, Albert F. Yee, Yueh-Ting Shih, Liping Huang
This manuscript explores the connection between the fast relaxation processes in a polymer glass and essential trends in the mechanical toughness, a non-linear mechanical property that is of practical interest for engineering polymers with high impact

Importance of Sub-Nanosecond Fluctuations on the Toughness of Polycarbonate Glasses

July 23, 2020
Author(s)
Christopher L. Soles, Kanae N. Ito, Adam B. Burns, Edwin P. Chan, Robert M. Dimeo, Madhu Sudan Tyagi, Albert F. Yee, Jianwei Liu
This article explores the relationship between the nano- to picosecond dynamics, as quantified by elastic incoherent neutron scattering, in polycarbonate (PC) glasses with their mechanical toughness. We establish a robust correlation between mechanical

Entangled Polymer Dynamics in Attractive Nanocomposite Melts

June 23, 2020
Author(s)
Erkan Senses, Saeid Darvishi, Madhu Sudan Tyagi, Antonio Faraone
We investigate single chain dynamics of an entangled linear poly (ethylene oxide) melt in presence of well-dispersed attractive nanoparticles using high resolution neutron spectroscopy at particle volume fractions as high as 0.53. The short time dynamics

Insights into the Water Transport Mechanism in Polymeric Membranes from Neutron Scattering

February 5, 2020
Author(s)
Edwin P. Chan, Bradley R. Frieberg, Jacob Daniel Tarver, Madhusudan Tyagi, WenXu Zhnag, Bryan Coughlin, Christopher M. Stafford, Abhishek Roy, Steve Rosenberg, Christopher L. Soles
Polymeric membranes are ubiquitous in a number of transport ap- plications including gas separation, water desalination, solid state batteries and fuel cells. The permeability and selectivity of these membranes are intimately linked to the structure and

Chain and Ion Dynamics in Precise Polyethylene Ionomers

October 11, 2019
Author(s)
Christopher L. Soles, Amalie Frischknecht, Benjamin Paren, Robert Middleton, Karen Winey, Jason Koski, Madhu Sudan Tyagi, Jacob Daniel Tarver
We analyze the dynamics from microsecond-long, atomistic molecular dynamics (MD) simulations of a series of precise poly(ethylene-co-acrylic acid) ionomers neutralized with lithium, with three different spacer lengths between acid groups on the ionomers

Molecular Partitioning in Ternary Solutions of Cellulose

September 15, 2019
Author(s)
Xin Zhang, Yimin NMN Mao, Madhu Sudan Tyagi, Feng Jiang, Doug Henderson, Bo Jiang, Zhiwei Lin, Ronald L. Jones, Liangbing Hu, Robert M. Briber, Howard Wang
Scattering measurements on the structure and dynamics of ternary solutions from dissolving microcrystalline cellulose (MC) in mixtures of ionic liquid (IL) and polar organic solvent have revealed dissolved cellulose molecular coils and partitioning of IL

Nanoscale Dynamics of Water Confined in Ordered Mesoporous Carbon

April 1, 2019
Author(s)
Kanae Ito, Antonio Faraone, Madhu Sudan Tyagi, Toshio Yamaguchi, Sow-Hsin Chen
The single particle dynamics of water confined within an ordered mesoporous carbon matrix was investigated in the temperature range from 290 K to 170 K by quasielastic neutron scattering using three high resolution neutron spectrometers. Thus, it was

New Insights into Water Dynamics of Portland Cement Paste with Nano-Additives using Quasielastic Neutron Scattering

March 1, 2019
Author(s)
Kunal Kupwade-Patil, Ali Bumajdad, Craig Brown, Madhu Sudan Tyagi, Nicholas Butch, Abdullah F. Jamsheer, Oral Buyukozturk
Early age hydration kinetics of Portland cement with nano additives such as nano-silica (NS) was examined using quasielastic neutron scattering (QENS). Cement pastes with different ratios of Portland cement to NS was prepared. The concentration of the NS

Dynamics of Hydride Ions in Metal Hydride-Reduced BaTiO 3 Samples Investigated with Quasielastic Neutron Scattering

January 31, 2019
Author(s)
Carin Eklof-Osterberg, Reji Nedumkandathil, Ulrich Haussermann, Aleksander Jaworski, Andrew J. Pell, Madhu Sudan Tyagi, Niina H. Jalarvo, Bernhard Frick, Antonio Faraone, Maths Karlsson
Perovskite-type oxyhydrides, BaTiO 3-xH^ x, have been recently shown to exhibit hydride ion (H -) conductivity at elevated temperatures, but the underlying mechanism of hydride ion conduction and how it depends on temperature and oxygen vacancy

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
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