The Experts below are selected from a list of 279 Experts worldwide ranked by ideXlab platform
Michael F. Butler - One of the best experts on this subject based on the ideXlab platform.
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Nonequilibrium Behavior in the Three-Component System Stearic Acid−Sodium Stearate−Water
Langmuir, 2003Co-Authors: Mary Heppenstall-butler, Michael F. ButlerAbstract:The state behavior of stearic acid−Sodium Stearate−water, which provides a model of a fatty acid structuring mechanism, was studied by differential scanning calorimetry (DSC), optical microscopy, and X-ray scattering. DSC mapped the state diagram of aged and quenched samples as a function of temperature. Optical microscopy identified a liquid crystal transition. Simultaneous small- and wide-angle X-ray scattering identified the structures present within different regions of the state diagram. Two acid/soaps differing in melting temperature, unit cell, lamellar spacing, and acid to soap chain ratio existed at room temperature. In half-neutralized samples, a lamellar hydrated gel phase with an hexagonal unit cell persisted to room temperature on quenching. Nonequilibrium behavior persisted to different degrees depending on the extent of neutralization of the system.
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nonequilibrium behavior in the three component system stearic acid Sodium Stearate water
Langmuir, 2003Co-Authors: Mary Heppenstallbutler, Michael F. ButlerAbstract:The state behavior of stearic acid−Sodium Stearate−water, which provides a model of a fatty acid structuring mechanism, was studied by differential scanning calorimetry (DSC), optical microscopy, and X-ray scattering. DSC mapped the state diagram of aged and quenched samples as a function of temperature. Optical microscopy identified a liquid crystal transition. Simultaneous small- and wide-angle X-ray scattering identified the structures present within different regions of the state diagram. Two acid/soaps differing in melting temperature, unit cell, lamellar spacing, and acid to soap chain ratio existed at room temperature. In half-neutralized samples, a lamellar hydrated gel phase with an hexagonal unit cell persisted to room temperature on quenching. Nonequilibrium behavior persisted to different degrees depending on the extent of neutralization of the system.
Alejandro G Marangoni - One of the best experts on this subject based on the ideXlab platform.
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ph and stability of the α gel phase in glycerol monoStearate water systems using Sodium stearoyl lactylate and Sodium Stearate as the co emulsifier
RSC Advances, 2015Co-Authors: Fan C Wang, Alejandro G MarangoniAbstract:Changing the environmental pH alters the melting profiles of monoStearate–water systems and affects the stability of the α-gel phase using Sodium stearoyl lactylate (SSL) and Sodium Stearate (NaS) as co-emulsifiers. NaS in MG-gels may be present both in a micellar phase and in a lamellar phase. Once above the critical micellar concentration of NaS, the NaS solution and diluted MG-gels remained at a stable pH.
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pH and stability of the α-gel phase in glycerol monoStearate–water systems using Sodium stearoyl lactylate and Sodium Stearate as the co-emulsifier
RSC Advances, 2015Co-Authors: Fan C Wang, Alejandro G MarangoniAbstract:Changing the environmental pH alters the melting profiles of monoStearate–water systems and affects the stability of the α-gel phase using Sodium stearoyl lactylate (SSL) and Sodium Stearate (NaS) as co-emulsifiers. NaS in MG-gels may be present both in a micellar phase and in a lamellar phase. Once above the critical micellar concentration of NaS, the NaS solution and diluted MG-gels remained at a stable pH.
Fan C Wang - One of the best experts on this subject based on the ideXlab platform.
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ph and stability of the α gel phase in glycerol monoStearate water systems using Sodium stearoyl lactylate and Sodium Stearate as the co emulsifier
RSC Advances, 2015Co-Authors: Fan C Wang, Alejandro G MarangoniAbstract:Changing the environmental pH alters the melting profiles of monoStearate–water systems and affects the stability of the α-gel phase using Sodium stearoyl lactylate (SSL) and Sodium Stearate (NaS) as co-emulsifiers. NaS in MG-gels may be present both in a micellar phase and in a lamellar phase. Once above the critical micellar concentration of NaS, the NaS solution and diluted MG-gels remained at a stable pH.
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pH and stability of the α-gel phase in glycerol monoStearate–water systems using Sodium stearoyl lactylate and Sodium Stearate as the co-emulsifier
RSC Advances, 2015Co-Authors: Fan C Wang, Alejandro G MarangoniAbstract:Changing the environmental pH alters the melting profiles of monoStearate–water systems and affects the stability of the α-gel phase using Sodium stearoyl lactylate (SSL) and Sodium Stearate (NaS) as co-emulsifiers. NaS in MG-gels may be present both in a micellar phase and in a lamellar phase. Once above the critical micellar concentration of NaS, the NaS solution and diluted MG-gels remained at a stable pH.
Mary Heppenstallbutler - One of the best experts on this subject based on the ideXlab platform.
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nonequilibrium behavior in the three component system stearic acid Sodium Stearate water
Langmuir, 2003Co-Authors: Mary Heppenstallbutler, Michael F. ButlerAbstract:The state behavior of stearic acid−Sodium Stearate−water, which provides a model of a fatty acid structuring mechanism, was studied by differential scanning calorimetry (DSC), optical microscopy, and X-ray scattering. DSC mapped the state diagram of aged and quenched samples as a function of temperature. Optical microscopy identified a liquid crystal transition. Simultaneous small- and wide-angle X-ray scattering identified the structures present within different regions of the state diagram. Two acid/soaps differing in melting temperature, unit cell, lamellar spacing, and acid to soap chain ratio existed at room temperature. In half-neutralized samples, a lamellar hydrated gel phase with an hexagonal unit cell persisted to room temperature on quenching. Nonequilibrium behavior persisted to different degrees depending on the extent of neutralization of the system.
Yiqiang Zhan - One of the best experts on this subject based on the ideXlab platform.
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Photoemission study of the Sodium Stearate/tris-(8-hydroxyquinoline) aluminum interface
Journal of Electron Spectroscopy and Related Phenomena, 2005Co-Authors: Huanjun Ding, Xiao Wang, Yiqiang Zhan, X.m. Ding, Xiaoyuan HouAbstract:Abstract Behaviors of amphiphilic Sodium Stearate (NaSt) molecules as a buffer material in tris-(8-hydroxyquinoline) aluminum (Alq)-based organic light-emitting diodes (OLEDs) have been studied by photoemission techniques. A 1.0 eV lowering of the vacuum level is measured when the Alq surface is covered with a 1.5 nm-thick NaSt layer, indicating that the NaSt molecule sticks on the surface with the Na end of its hydrophilic head pointing to the surface. Moderate anneal of the NaSt-covered Alq sample results in a more surface concentrated distribution of Na than N in the substrate, showing that the thermal energy the NaSt molecules gain may strengthen their amphiphilic arrangement, which is beneficial to efficient and stable operation of the OLEDs against degradation.
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photoemission study of the Sodium Stearate tris 8 hydroxyquinoline aluminum interface
Journal of Electron Spectroscopy and Related Phenomena, 2005Co-Authors: Huanjun Ding, Xiao Wang, Yiqiang Zhan, X.m. Ding, X Y HouAbstract:Abstract Behaviors of amphiphilic Sodium Stearate (NaSt) molecules as a buffer material in tris-(8-hydroxyquinoline) aluminum (Alq)-based organic light-emitting diodes (OLEDs) have been studied by photoemission techniques. A 1.0 eV lowering of the vacuum level is measured when the Alq surface is covered with a 1.5 nm-thick NaSt layer, indicating that the NaSt molecule sticks on the surface with the Na end of its hydrophilic head pointing to the surface. Moderate anneal of the NaSt-covered Alq sample results in a more surface concentrated distribution of Na than N in the substrate, showing that the thermal energy the NaSt molecules gain may strengthen their amphiphilic arrangement, which is beneficial to efficient and stable operation of the OLEDs against degradation.
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Sodium Stearate, an effective amphiphilic molecule buffer material between organic and metal layers in organic light-emitting devices
Applied Physics Letters, 2003Co-Authors: Yiqiang Zhan, Z. H. Xiong, H. Z. Shi, S. T. Zhang, G. Y. Zhong, J. M. Zhao, Z. J. Wang, E.g. ObbardAbstract:Tris (8-hydroxyquinoline) aluminum (Alq3)-based organic light-emitting devices using an amphiphilic molecule Sodium Stearate (NaSt) layer between aluminum (Al) cathode and Alq3 have been fabricated. By comparing the devices with those containing a LiF buffer layer, the results demonstrate that both have almost the same high electroluminescent (EL) brightness but the former is more stable. The amphiphilic property of NaSt is considered as the main reason for this enhancement.