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Search Publications by: Michihiro Nagao (Assoc)

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Displaying 26 - 39 of 39

Effect of Charge on the Mechanical Properties of Surfactant Bilayers

November 23, 2016
Author(s)
Robert David Bradbury, Michihiro Nagao
The viscoelastic properties of surfactant bilayers have been measured over a range of surface charge densities, for a system with a low ionic strength, using small-angle neutron scattering and neutron spin echo (NSE) spectroscopy. An increase in the

Neutron Polarization Analysis for Biphasic Solvent Extraction Systems

June 16, 2016
Author(s)
Ryuhei Motokawa, Hitoshi Endo, Michihiro Nagao, William T. Heller
We performed neutron polarization analysis (NPA) of extracted organic phases containing complexes, comprised of Zr(NO 3( 4 and tri-n-butyl phosphate (TBP), to decompose the intensity distribution of small-angle neutron scattering (SANS) into the coherent

Mechanism of Spontaneous Blebbing Motion of Oil-Water Interface: Elastic Stress Generated by a Lamellar-Lamellar Transition

March 3, 2016
Author(s)
Yutaka Sumino, Norifumi L. Yamada, Michihiro Nagao, Takuya Honda, Hiroyuki Kitahata, Yuri B. Melnichenko, Hideki Seto
A mimic of biological blebbing motions constructed by a purely chemical system has been studied to understand nanometer scale structure and their roles in the spontaneous motion. Transition of surfactant lamellar phase was away rom the interface

Nanostructures and Dynamics of Macromolecules Bound to Attractive Filler Surfaces

August 18, 2015
Author(s)
Naisheng Jiang, Maya K. Endoh, Tadanori Koga, Tomomi Masui, Hiroyuki Kishimoto, Michihiro Nagao, Sushil K. Satija, Takashi Taniguchi
We report in-situ structures and dynamics of polybutadiene (PB) chains bound to carbon black (CB) fillers (the so-called "bound polymer layer (BPL)") in a good solvent. The BPL on the CB fillers were extracted by solvent leaching of a CB-filled PB compound

Observation of Small Cluster Formation in Concentrated Monoclonal Antibody Solutions and Its Implications to Solution Viscosity

April 15, 2014
Author(s)
Eric J. Yearley, Paul D. Godfrin, Tatiana NMN Perevozchikova, Hailiang Zhang, Peter Falus, Lionel Porcar, Michihiro Nagao, Joseph E. Curtis, Pradad Gawande, Rosalynn Taing, Isidro E. Zarraga, Norman J. Wagner, Yun Liu
Monoclonal antibodies (mAbs) are a major class of biopharmaceuticals. Some concentrated mAb solutions are hypothesized to exhibit the formation of a solution phase consisting of reversibly self-associated aggregates (or reversible clusters), which is

Quasi-elastic Neutron Scattering Studies on Dynamics of Water Confined in Nanoporous Copper Rubeanate Hydrates

October 14, 2011
Author(s)
Takeshi Yamada, Ryo Yonaimine, Teppei Yamada, Hiroshi Kitagawa, Madhu Sudan Tyagi, Michihiro Nagao, Osamu Yamamuro
We have investigated the mechanism of the first order transition and proton conductivity in copper rubeanate hydrates from microscopic and dynamical points of view. Three different types of neutron spectrometer, time of flight, back scattering and neutron

Hierarchical Structure and Dynamics of an Ionic Liquid 1-Octyl-3-methylimidazolium Chloride

August 3, 2011
Author(s)
Osamu Yamamuro, Takeshi Yamada, Maiko Kofu, Masamichi Nakakoshi, Michihiro Nagao
We have performed the heat capacity, neutron diffraction, and neutron quasielas- tic scattering measurements of an ionic liquid 1-octyl-3-methylimidazolium chloride (C8mimCl). The heat capacity data revealed that C8mimCl exhibits a glass tran- sition with

Structure and Dynamics in Multicomponent Polyelectrolyte Solutions

March 11, 2008
Author(s)
Sanghun Lee, Vijay Tirumala, Michihiro Nagao, Taiki Tominaga, Eric K. Lin, Jian P. Gong, Wen-Li Wu
Double-network hydrogels (DN-gels) prepared from the combination of a moderately crosslinked anionic polyelectrolyte (poly(2-acrylamido-2-methyl-1-propanesulfonic acid, PAMPS) and an uncrosslinked linear polymer (polyacrylamide, PAAm) solution show strong
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