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Search Publications by: Antonio Faraone (Fed)

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Displaying 101 - 125 of 131

Structure and Dynamics of Interacting Nanoparticles in Semidilute Polymer Solutions

August 17, 2016
Author(s)
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
Author(s)
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

Kinetic Polymer Arrest in Percolated SWNT Networks

December 3, 2014
Author(s)
Rana NMN Ashkar, Mansour Abdul Baki, Madhu Sudan Tyagi, Antonio Faraone, Paul Butler, Ramanan Krishnamoorti
The inclusion of single-wall carbon nanotubes (SWNT) in a polymer, with interchain distances comparable to the SWNT diameter, can significantly perturb the structural and dynamical properties of interfacial polymeric units. For SWNT concentrations above

Incoherent Quasielastic Neutron Scattering Study of the Relaxation Dynamics in Molybdenum-Oxide Based Keplerate Type Nanocages

June 19, 2014
Author(s)
Antonio Faraone, Emiliano Fratini, Somenath Garai, Achim Muller, Madhu Sudan Tyagi, Timothy Jenkins, Eugene Mamontov, Rick L. Paul, John R. Copley, Piero Baglioni
The single particle relaxation dynamics of hydrogen atoms in different oxomolybdate Keplerate type nanocages characterized by a (metal) 30 icosidodecahedron and a size of {approximately equal}25 A were studied using Incoherent Quasielastic Neutron

Coherent Dynamics of meta-Toluidine Investigated by QuasiElastic Neutron Scattering

March 14, 2012
Author(s)
Antonio Faraone, Kunlun Hong, Larry Kneller, Michael Ohl, John R. Copley
The coherent dynamics of a typical fragil glass former, meta-toluidine, was investigated at the molecular level using QuasiElastic Neutron Scattering, with Time-of-Flight and Neutron Spin Echo spectrometers. It is well known that the static structure

Temperature Dependence of Structure and Density for D 2 O Confined in MCM-41-S

February 15, 2012
Author(s)
William A. Kamitakahara, Antonio Faraone, Kao-Hsiang Liu, Chung-Yuan Mou
Using neutron diffraction, we have tracked the temperature dependence of structural properties for heavy water confined in the nanoporous silica matrix MCM-41-S. By observing the correlation peak corresponding to the pore-pore distance, which is determined

Distinguishing the Monomer to Cluster Phase Transition in Concentrated Lysozyme Solutions by Studying the Temperature Dependence of the Short-Time Dynamics

January 25, 2012
Author(s)
Peter Falus, Lionel Porcar, Emiliano Fratini, Wei-Ren Chen, Antonio Faraone, Kunlun Hong, Piero Baglioni, Yun Liu
Recently experiments that combine both small angle neutron scattering (SANS) and Neutron Spin Echo (NSE) have demonstrated that dynamic clusters can form in concentrated lysozyme solutions when a right combination of a short-ranged attraction and long

Light-Controlled Protein Dynamics Observed with Neutron Spin Echo Measurements

August 2, 2011
Author(s)
Shao-Chun Wang, Panteha Mirarefi, Antonio Faraone, Jr. Lee
A photo-responsive surfactant has been used as a means to control protein structure and dynamics with light illumination. This cationic azobenzene surfactant, azoTAB, which undergoes a reversible photoisomerization upon exposure to the appropriate