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Search Publications by: Antonio Faraone (Fed)

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Displaying 26 - 50 of 61

Tracking the Progression of Anion Reorientational Behavior between a-Phase and b-Phase Alkali-Metal Silanides, MSIH 3 , by Quasielastic Neutron Scattering

October 25, 2018
Mirjana NMN Dimitrievska, Jean-Noel Chotard, Raphael Janot, Antonio Faraone, Wan Si Tang, Alexander V. Skripov, Terrence J. Udovic
Quasielastic neutron scattering (QENS) measurements over a wide range of resolutions were used to probe the reorientational behavior of the pyramidal SiH 3 - anions in the mono-alkali silanides (MSiH 3 , where M-K, Rb, and Cs) within the low-temperature

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

October 5, 2018
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

Nature of Decahydro-Closo-Decaborate Anion Reorientations in an Ordered Alkali-Metal Salt: Rb 2 B 10 H 10

July 12, 2018
Mirjana NMN Dimitrievska, Vitalie Stavila, Alexei V. Soloninin, Roman V. Skoryunov, Olga A. Babanova, Hui Wu, Wei Zhou, Wan Si Tang, Antonio Faraone, Jacob Daniel Tarver, Benjamin Trump, Alexander V. Skripov, Terrence J. Udovic
The ordered monoclinic phase of the alkali-metal decahydro-closodecaborate salt Rb 2 B 10 H 10 was found to be stable from about 250 K all the way up to an order-disorder phase transition temperature of approximately equal} 762 K. The broad temperature

Dynamics of Phospholipid Membranes Beyond Thermal Undulations

June 7, 2018
Sudipta Gupta, Judith U. De Mel, Rasangi M. Perera, Piotr Zolnierczuk, Markus Bleuel, Antonio Faraone, Gerald J. Schneider
We investigated the molecular dynamics of unilamellar lipsomes by neutron spin echo spectroscopy. We report the first experimental evidence of a short-range motion at the length-scale of the size of the head group of a lipid. The associated mean square

Highly Reversible Zinc Metal Anode for Aqueous Batteries

June 1, 2018
Fei Wang, Oleg Borodin, Tao Gao, Xiulin Fan, Wei Sun, Fudong Han, Antonio Faraone, Joseph Dura, Kang Xu, Chunsheng Wang
Metallic zinc (Zn) has been regarded as an ideal anode material for aqueous batteries, because of its high theoretical capacity (820 mAh/g), low electrochemical potential (-0.762 V vs. SHE), high abundance, low toxicity and intrinsic safety. There has been

Glycerol Hydrogen-Bonding Network Dominates Structure and Collective Dynamics in a Deep Eutectic Solvent

January 25, 2018
Antonio Faraone, Durgesh V. Wagle, Gary A. Baker, E. C. Novak, M. Ohl, D. Reuter, Peter Lunkenheimer, A. Loidl, Eugene Mamontov
The deep eutectic solvent glyceline formed by choline chloride and glycerol in 1:2 molar ratio is much less viscous compared to glycerol, which facilitates its use in many applications where high viscosity is undesirable. Despite the large difference in

Nanoscale Particle Motion in Attractive Polymer Nanocomposites

December 6, 2017
Erkan NMN Senses, Suresh Narayanan, Yimin NMN Mao, Antonio Faraone
Using x-ray photon correlation spectroscopy, we examined slow nanoscale motion of silica nanoparticles individually dispersed in entangled poly (ethylene oxide) melt at particle volume fractions up to 42%. The nanoparticles, therefore, serve as both

Liquid Structure with Nano-Heterogeneity Promotes Cationic Transport in Concentrated Electrolytes

October 10, 2017
Oleg Borodin, Liumin Suo, Mallory Gobet, Xiaoming Ren, Fei Wang, Antonio Faraone, Jing Peng, Marco Olguin, Marshall Schroeder, Michael S. Ding, Eric Gobrogge, Arthur von Wald Cresce, Stephen Munoz, Joseph Dura, Steve Greenbaum, Chunsheng Wang, Kang Xu
Using molecular dynamics simulations, small angle neutron scattering and a variety of spectroscopic techniques, we evaluated the ion solvation and transport behaviors in aqueous electrolytes containing bis(trifluoromethane sulfonyl)imide (LiTFSI). We

Small Particle Driven Chain Disentanglements in Polymer Nanocomposites

April 5, 2017
Erkan NMN Senses, Siyam M. Ansar, Christopher L. Kitchens, Yimin NMN Mao, Suresh Narayanan, Bharath NMN Natarajan, Antonio Faraone
Using neutron spin-echo spectroscopy, X-ray photon correlation spectroscopy and bulk rheology, we studied the effect of particle size on the single chain dynamics, particle mobility, and bulk viscosity in athermal polyethylene oxide-gold nanoparticle

Hydrogen Diffusion in Bulk and Nanocrystalline Palladium: A Quasielastic Neutron Scattering Study

August 29, 2016
Maiko Kofu, Naoki Hashimoto, Hiroshi Akiba, Hirokazu Kobayashi, Hiroshi Kitagawa, Hiroshi Kitagawa, Madhu Sudan Tyagi, Antonio Faraone, John R. Copley, Wiebke Lohstroh, Osamu Yamamuro
The diffusion dynamics of hydrogen in bulk and Nanocrystalline palladium has been examined using quasielastic neutron scattering (QENS). With respect to bulk PdH 0.73, two relaxation processes were found. For both processes, the variation of the relaxation

Structure and Dynamics of Interacting Nanoparticles in Semidilute Polymer Solutions

August 17, 2016
Ryan Poling-Skutvik, Katrina Irene S. Mongcopa, Antonio Faraone, Suresh Narayanan, Jacinta C. Conrad, Ramanan Krishnamoorti
We investigate the structure and dynamics of silica nanoparticles and polymer chains in semidilute solutions of high molecular weight polystyrene in 2-butanone to determine the effect of long range interparticle interactions on the coupling between

Dynamic Signature of Molecular Association in Methanol

July 7, 2016
Christopher E. Bertrand, Jeffrey L. Self, John R. Copley, Antonio Faraone
Quasielastic neutron scattering measurements and molecular dynamics simulations were combined to investigate the collective dynamics of deuterated methanol. A slow, non-Fickian mode was observed in addition to the standard heat mode. The qualitative