1
|
Kawabata Y, Bradbury R, Kugizaki S, Weigandt K, Melnichenko YB, Sadakane K, Yamada NL, Endo H, Nagao M, Seto H. Effect of interlamellar interactions on shear induced multilamellar vesicle formation. J Chem Phys 2017; 147:034905. [PMID: 28734290 DOI: 10.1063/1.4994563] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Shear-induced multilamellar vesicle (MLV) formation has been studied by coupling the small-angle neutron scattering (SANS) technique with neutron spin echo (NSE) spectroscopy. A 10% mass fraction of the nonionic surfactant pentaethylene glycol dodecyl ether (C12E5) in water was selected as a model system for studying weak inter-lamellar interactions. These interactions are controlled either by adding an anionic surfactant, sodium dodecyl sulfate, or an antagonistic salt, rubidium tetraphenylborate. Increasing the charge density in the bilayer induces an enhanced ordering of the lamellar structure. The charge density dependence of the membrane bending modulus was determined by NSE and showed an increasing trend with charge. This behavior is well explained by a classical theoretical model. By considering the Caillé parameters calculated from the SANS data, the layer compressibility modulus B¯ is estimated and the nature of the dominant inter-lamellar interaction is determined. Shear flow induces MLV formation around a shear rate of 10 s-1, when a small amount of charge is included in the membrane. The flow-induced layer undulations are in-phase between neighboring layers when the inter-lamellar interaction is sufficiently strong. Under these conditions, MLV formation can occur without significantly changing the inter-lamellar spacing. On the other hand, in the case of weak inter-lamellar interactions, the flow-induced undulations are not in-phase, and greater steric repulsion leads to an increase in the inter-lamellar spacing with shear rate. In this case, MLV formation occurs as the amplitude of the undulations gets larger and the steric interaction leads to in-phase undulations between neighboring membranes.
Collapse
Affiliation(s)
- Y Kawabata
- Department of Chemistry, Tokyo Metropolitan University, Hachioji, Tokyo 192-0397, Japan
| | - R Bradbury
- Center for Exploration of Energy and Matter, Department of Physics, Indiana University, Bloomington, Indiana 47408, USA
| | - S Kugizaki
- Department of Chemistry, Tokyo Metropolitan University, Hachioji, Tokyo 192-0397, Japan
| | - K Weigandt
- NIST Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, Maryland 20899-6102, USA
| | - Y B Melnichenko
- Biology and Soft Matter Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831-6393, USA
| | - K Sadakane
- Faculty of Life and Medical Sciences, Doshisha University, Kyotanabe, Kyoto 610-0321, Japan
| | - N L Yamada
- Institute of Materials Structure Science, High Energy Accelerator Research Organization, Tokai 319-1106, Japan
| | - H Endo
- Institute of Materials Structure Science, High Energy Accelerator Research Organization, Tokai 319-1106, Japan
| | - M Nagao
- Center for Exploration of Energy and Matter, Department of Physics, Indiana University, Bloomington, Indiana 47408, USA
| | - H Seto
- Institute of Materials Structure Science, High Energy Accelerator Research Organization, Tokai 319-1106, Japan
| |
Collapse
|
2
|
Ohisa S, Pu YJ, Yamada NL, Matsuba G, Kido J. Influence of solution- and thermal-annealing processes on the sub-nanometer-ordered organic-organic interface structure of organic light-emitting devices. Nanoscale 2017; 9:25-30. [PMID: 27808316 DOI: 10.1039/c6nr06654b] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Solution- and thermal-annealing processed organic-organic interface structures were investigated by neutron reflectometry. We revealed the true picture of interfaces, a polymer hole-transporting layer - a small molecule light-emitting layer - a small molecule electron-transporting layer, and discussed influences of those interface structures on organic light-emitting devices.
Collapse
Affiliation(s)
- S Ohisa
- Department of Organic Materials Science, Graduate School of Organic Materials Science, Yamagata University, Yonezawa, Yamagata, 992-8510 Japan.
| | | | | | | | | |
Collapse
|
3
|
Chen F, Peng D, Ogata Y, Tanaka K, Yang Z, Fujii Y, Yamada NL, Lam CH, Tsui OKC. Confinement Effect on the Effective Viscosity of Plasticized Polymer Films. Macromolecules 2015. [DOI: 10.1021/acs.macromol.5b01780] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- F. Chen
- Department
of Physics, Boston University, Boston, Massachusetts 02215, United States
| | - D. Peng
- Department
of Physics, Boston University, Boston, Massachusetts 02215, United States
| | - Y. Ogata
- Department
of Applied Chemistry, Kyushu University, Fukuoka 819-0395, Japan
| | - K. Tanaka
- Department
of Applied Chemistry, Kyushu University, Fukuoka 819-0395, Japan
| | - Z. Yang
- Department
of Polymer Science and Engineering, Soochow University, Suzhou, P. R. China
| | - Y. Fujii
- National Institute
for Materials Science, 1-1 Namiki, Tsukuba, Japan
| | - N. L. Yamada
- Neutron
Science Laboratory, High Energy Accelerator Research Organization, Ibaraki 305-0044, Japan
| | - C.-H. Lam
- Department
of Applied Physics, Hong Kong Polytechnic University, Hung Hom, Hong Kong
| | - O. K. C. Tsui
- Department
of Physics, Boston University, Boston, Massachusetts 02215, United States
- Division of Materials Science & Engineering, Boston University, Brookline, Massachusetts 02446, United States
| |
Collapse
|
4
|
Taminato S, Hirayama M, Suzuki K, Yamada NL, Yonemura M, Son JY, Kanno R. Highly reversible capacity at the surface of a lithium-rich manganese oxide: a model study using an epitaxial film system. Chem Commun (Camb) 2015; 51:1673-6. [DOI: 10.1039/c4cc07758j] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The surface region of a lithium-rich manganese oxide Li2MnO3 is intrinsically active at the electrochemical interface and exhibits a high discharge capacity over 300 mA h g−1 in the fiftieth cycle.
Collapse
Affiliation(s)
- S. Taminato
- Department of Electronic Chemistry
- Interdisciplinary Graduate School of Science and Engineering
- Tokyo Institute of Technology
- Midori-ku
- Japan
| | - M. Hirayama
- Department of Electronic Chemistry
- Interdisciplinary Graduate School of Science and Engineering
- Tokyo Institute of Technology
- Midori-ku
- Japan
| | - K. Suzuki
- Department of Electronic Chemistry
- Interdisciplinary Graduate School of Science and Engineering
- Tokyo Institute of Technology
- Midori-ku
- Japan
| | - N. L. Yamada
- Neutron Science Division
- Institute of Materials Structure Science
- High Energy Accelerator Research Organization (KEK)
- Tokai
- Japan
| | - M. Yonemura
- Neutron Science Division
- Institute of Materials Structure Science
- High Energy Accelerator Research Organization (KEK)
- Tokai
- Japan
| | - J. Y. Son
- Japan Synchrotron Radiation Research Institute (JASRI)
- Sayo
- Japan
| | - R. Kanno
- Department of Electronic Chemistry
- Interdisciplinary Graduate School of Science and Engineering
- Tokyo Institute of Technology
- Midori-ku
- Japan
| |
Collapse
|
5
|
Hirata T, Matsuno H, Kawaguchi D, Yamada NL, Tanaka M, Tanaka K. Effect of interfacial structure on bioinert properties of poly(2-methoxyethyl acrylate)/poly(methyl methacrylate) blend films in water. Phys Chem Chem Phys 2015; 17:17399-405. [DOI: 10.1039/c5cp01972a] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Poly(2-methoxyethyl acrylate) (PMEA) segregation to the water interface in a blend film disturbed the network structure of water molecules, resulting in effective suppression of platelet adhesion.
Collapse
Affiliation(s)
- T. Hirata
- Department of Applied Chemistry
- Kyushu University
- Fukuoka 819-0395
- Japan
| | - H. Matsuno
- Department of Applied Chemistry
- Kyushu University
- Fukuoka 819-0395
- Japan
| | - D. Kawaguchi
- Education Center for Global Leaders in Molecular Systems for Devices
- Kyushu University
- Fukuoka 819-0395
- Japan
| | - N. L. Yamada
- Neutron Science Laboratory
- High Energy Accelerator Research Organization
- Ibaraki 305-0801
- Japan
| | - M. Tanaka
- Department of Biochemical Engineering
- Yamagata University
- Yamagata 992-8510
- Japan
| | - K. Tanaka
- Department of Applied Chemistry
- Kyushu University
- Fukuoka 819-0395
- Japan
- International Institute for Carbon-Neutral Energy Research (WPI-I2CNER)
| |
Collapse
|
6
|
Yonemura M, Hirayama M, Suzuki K, Kanno R, Torikai N, Yamada NL. Development of Spectroelectrochemical Cells for in situ Neutron Reflectometry. ACTA ACUST UNITED AC 2014. [DOI: 10.1088/1742-6596/502/1/012054] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
|
7
|
Torikai N, Yamada NL, Sagehashi H, Sugita T, Goko S, Furusaka M, Higashi Y, Hino M, Fujiwara T, Takahashi H. Development of a Physically Bent Cylindroid Mirror for Beam Focusing for a Pulsed Neutron Reflectometer. ACTA ACUST UNITED AC 2011. [DOI: 10.1088/1757-899x/24/1/012016] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
|
8
|
Torikai N, Yamada NL, Kawaguchi D, Takano A, Matsushita Y, Watkins E, Majewski JP. Depth distribution of different solvents in a phase-separated block copolymer thin film. ACTA ACUST UNITED AC 2011. [DOI: 10.1088/1742-6596/272/1/012027] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
|
9
|
Terayama Y, Arita H, Ishikawa T, Kikuchi M, Mitamura K, Kobayashi M, Yamada NL, Takahara A. Chain dimensions in free and immobilized brush states of polysulfobetaine in aqueous solution at various salt concentrations. ACTA ACUST UNITED AC 2011. [DOI: 10.1088/1742-6596/272/1/012010] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
|
10
|
Hishida M, Yamada NL, Yoshikawa K, Seto H. Morphological development of multilamellar phospholipid film depending on drying kinetics. Phys Rev E Stat Nonlin Soft Matter Phys 2009; 80:051407. [PMID: 20364985 DOI: 10.1103/physreve.80.051407] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/06/2009] [Revised: 10/09/2009] [Indexed: 05/29/2023]
Abstract
The mechanism for the formation of solid-supported phospholipid membranes during a drying process was investigated. Terracelike multilamellar structures were found to develop from a micellar solution with either spinodal decompositionlike process or nucleation growth, depending on the evaporation rate of an organic solvent. In contrast to the well-known kinetics of phase separation, fast drying induces nucleation while slow drying induces spinodal decompositionlike lipid-film formation. The existing models for the interpretation of phase separation are not sufficient to understand this unexpected kinetics. We suggest a schematic model with which this kinetic feature can be interpreted in terms of a self-assembly pathway in a three-component phase diagram for a phospholipid, organic solvent, and water.
Collapse
Affiliation(s)
- M Hishida
- Department of Physics, Graduate School of Science, Kyoto University, Kyoto 606-8502, Japan.
| | | | | | | |
Collapse
|
11
|
Seto H, Yamada NL, Nagao M, Hishida M, Takeda T. Bending modulus of lipid bilayers in a liquid-crystalline phase including an anomalous swelling regime estimated by neutron spin echo experiments. Eur Phys J E Soft Matter 2008; 26:217-223. [PMID: 18446269 DOI: 10.1140/epje/i2007-10315-0] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/01/2007] [Accepted: 03/17/2008] [Indexed: 05/26/2023]
Abstract
Membrane fluctuations of dipalmitoylphosphatidylcholine (DPPC) and dimyristoylphosphatidylcholine (DMPC) were investigated by neutron spin echo spectroscopy. The intermediate structure factor was analyzed in terms of the model proposed by Zilman and Granek (Phys. Rev. Lett. 77, 4788 (1996)), and the bending modulus of lipid bilayers was derived. The hardening of a lipid bilayer upon approaching the main transition point in the anomalous swelling regime was observed, which naturally connects the bending modulus in the gel phase below the main transition temperature.
Collapse
Affiliation(s)
- H Seto
- Department of Physics, Kyoto University, Kyoto, Japan.
| | | | | | | | | |
Collapse
|
12
|
Kawabata Y, Nagao M, Seto H, Komura S, Takeda T, Schwahn D, Yamada NL, Nobutou H. Temperature and pressure effects on the bending modulus of monolayers in a ternary microemulsion. Phys Rev Lett 2004; 92:056103. [PMID: 14995321 DOI: 10.1103/physrevlett.92.056103] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/21/2003] [Indexed: 05/24/2023]
Abstract
We performed small-angle neutron scattering and neutron spin echo experiments on a ternary microemulsion composed of ionic surfactant AOT, water, and decane. Thermal fluctuations of monolayers have been investigated as a function of temperature and pressure. The amphiphilic monolayers become more flexible with increasing temperature and more rigid with increasing pressure. These results are consistent with the microscopic picture that the head-head repulsion of the AOT molecules is enhanced at high temperature while an attractive interaction between the hydrophobic tails of the AOT molecules increases at high pressure.
Collapse
Affiliation(s)
- Y Kawabata
- Department of Chemistry, Faculty of Science, Tokyo Metropolitan University, Tokyo 192-0397, Japan.
| | | | | | | | | | | | | | | |
Collapse
|