The Experts below are selected from a list of 131220 Experts worldwide ranked by ideXlab platform
W Kautek - One of the best experts on this subject based on the ideXlab platform.
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A study on the Bonding Structure and mechanical properties of magnetron sputtered CNx thin films
Diamond and Related Materials, 2001Co-Authors: Argiris Laskarakis, C Charitidis, Y Panayiotatos, M Handrea, Stergios Logothetidis, Maria Gioti, W KautekAbstract:Abstract Carbon nitride (CN x ) films have been deposited by reactive (RF) magnetron sputtering, in order to investigate the effect of the energetic ion bombardment during deposition (IBD), in terms of applied V b , on their Bonding Structure. Fourier Transform IR Ellipsometry (FTIRE) and X-ray photoelectron spectroscopy (XPS) were used for the investigation of the films Bonding Structure, while their mechanical properties were evaluated by nanoindentation measurements. At films grown with low negative V b , (low energy IBD) the N atoms are distributed homogeneously in substitutional sites in graphitic rings through both sp 2 and sp 3 bonds and in linear chains, through sp 2 bonds. In contrast, the high negative V b (high energy IBD) has been suggested to promote the non-homogeneous N distribution at localized regions in the films where the formation of sp 3 CN bonds is favored. This behavior was also evidenced by the C1s and N1s XPS peak components, assigned to the sp 3 and sp 2 carbon–nitrogen bonds. Also, high energy IBD films revealed increased values of hardness and elasticity, while hardness values up to 45 GPa were measured at localized regions.
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A study on the Bonding Structure and mechanical properties of magnetron sputtered CNx thin films
Diamond and Related Materials, 2001Co-Authors: A Laskarakis, S Logothetidis, C Charitidis, M Gioti, Y Panayiotatos, M Handrea, W KautekAbstract:Carbon nitride (CNx) films have been deposited by reactive (RF) magnetron sputtering, in order to investigate the effect of the energetic ion bombardment during deposition (IBD), in terms of applied Vb, on their Bonding Structure. Fourier Transform IR Ellipsometry (FTIRE) and X-ray photoelectron spectroscopy (XPS) were used for the investigation of the films Bonding Structure, while their mechanical properties wer
Adam P Willard - One of the best experts on this subject based on the ideXlab platform.
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water s interfacial hydrogen Bonding Structure reveals the effective strength of surface water interactions
Journal of Physical Chemistry B, 2018Co-Authors: Sucheol Shin, Adam P WillardAbstract:The interactions of a hydrophilic surface with water can significantly influence the characteristics of the liquid water interface. In this manuscript, we explore this influence by studying the molecular Structure of liquid water at a disordered surface with tunable surface−water interactions. We combine all-atom molecular dynamics simulations with a mean field model of interfacial hydrogen Bonding to analyze the effect of surface−water interactions on the structural and energetic properties of the liquid water interface. We find that the molecular Structure of water at a weakly interacting (i.e., hydrophobic) surface is resistant to change unless the strength of surface−water interactions is above a certain threshold. We find that below this threshold water’s interfacial Structure is homogeneous and insensitive to the details of the disordered surface, however, above this threshold water’s interfacial Structure is heterogeneous. Despite this heterogeneity, we demonstrate that the equilibrium distribution...
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water s interfacial hydrogen Bonding Structure reveals the effective strength of surface water interactions
arXiv: Soft Condensed Matter, 2018Co-Authors: Sucheol Shin, Adam P WillardAbstract:The interactions of a hydrophilic surface with water can significantly influence the characteristics of the liquid water interface. In this manuscript, we explore this influence by studying the molecular Structure of liquid water at a disordered surface with tunable surface-water interactions. We combine all-atom molecular dynamics simulations with a mean field model of interfacial hydrogen Bonding to analyze the effect of surface-water interactions on the structural and energetic properties of the liquid water interface. We find that the molecular Structure of water at a weakly interacting (i.e., hydrophobic) surface is resistant to change unless the strength of surface-water interactions are above a certain threshold. We find that below this threshold water's interfacial Structure is homogeneous and insensitive to the details of the disordered surface, however, above this threshold water's interfacial Structure is heterogeneous. Despite this heterogeneity, we demonstrate that the equilibrium distribution of molecular orientations can be used to quantify the energetic component of the surface-water interactions that contribute specifically to modifying the interfacial hydrogen Bonding network. We identify this specific energetic component as a new measure of hydrophilicity, which we refer to as the intrinsic hydropathy.
Huifang Chan - One of the best experts on this subject based on the ideXlab platform.
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the hydration mechanism and hydrogen Bonding Structure of 6 carboxylate chitooligosaccharides superabsorbent material prepared by laccase tempo oxidation system
Carbohydrate Polymers, 2018Co-Authors: Jicheng Pei, Fangdong Zhang, Haitang Liu, Zhimin Zhou, Xiaoqin Zhen, Jing Wang, Xinli Zhang, Huifang ChanAbstract:Abstract 6-carboxylate chitooligosaccharides (6-CCOS), as a superabsorbent material, were prepared by way of the laccase/TEMPO oxidation system. It exhibited a higher moisture-absorption ability and stronger affinity for water. To understand the real reasons for this, the hydrogen Bonding Structure of 6-CCOS and the hydration mechanism of the molecule were investigated using infrared (IR), differential scanning calorimetry (DSC), and nuclear magnetic resonance (NMR). It was found that the introduction of a strongly hydrophilic carboxylate ion on the C6 site of chitooligosaccharides molecule was conducive to the enhancement of the interaction between polysaccharide polymers and water molecules. The most important was the formation of hydrogen bonds connected between carboxylate ion and residual water. In addition, the hydration mechanism of 6-CCOS molecules was presumed to be that more water molecules from outside were incorporated into the already embedded water molecules within the polymer. The whole molecule was woven into a huge water-polymer network Structure through intermolecular hydrated hydrogen bonds.
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The hydration mechanism and hydrogen Bonding Structure of 6-carboxylate chitooligosaccharides superabsorbent material prepared by laccase/TEMPO oxidation system.
Carbohydrate Polymers, 2018Co-Authors: Jicheng Pei, Fangdong Zhang, Haitang Liu, Zhimin Zhou, Xiaoqin Zhen, Jing Wang, Xinli Zhang, Huifang ChanAbstract:Abstract 6-carboxylate chitooligosaccharides (6-CCOS), as a superabsorbent material, were prepared by way of the laccase/TEMPO oxidation system. It exhibited a higher moisture-absorption ability and stronger affinity for water. To understand the real reasons for this, the hydrogen Bonding Structure of 6-CCOS and the hydration mechanism of the molecule were investigated using infrared (IR), differential scanning calorimetry (DSC), and nuclear magnetic resonance (NMR). It was found that the introduction of a strongly hydrophilic carboxylate ion on the C6 site of chitooligosaccharides molecule was conducive to the enhancement of the interaction between polysaccharide polymers and water molecules. The most important was the formation of hydrogen bonds connected between carboxylate ion and residual water. In addition, the hydration mechanism of 6-CCOS molecules was presumed to be that more water molecules from outside were incorporated into the already embedded water molecules within the polymer. The whole molecule was woven into a huge water-polymer network Structure through intermolecular hydrated hydrogen bonds.
Sucheol Shin - One of the best experts on this subject based on the ideXlab platform.
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water s interfacial hydrogen Bonding Structure reveals the effective strength of surface water interactions
Journal of Physical Chemistry B, 2018Co-Authors: Sucheol Shin, Adam P WillardAbstract:The interactions of a hydrophilic surface with water can significantly influence the characteristics of the liquid water interface. In this manuscript, we explore this influence by studying the molecular Structure of liquid water at a disordered surface with tunable surface−water interactions. We combine all-atom molecular dynamics simulations with a mean field model of interfacial hydrogen Bonding to analyze the effect of surface−water interactions on the structural and energetic properties of the liquid water interface. We find that the molecular Structure of water at a weakly interacting (i.e., hydrophobic) surface is resistant to change unless the strength of surface−water interactions is above a certain threshold. We find that below this threshold water’s interfacial Structure is homogeneous and insensitive to the details of the disordered surface, however, above this threshold water’s interfacial Structure is heterogeneous. Despite this heterogeneity, we demonstrate that the equilibrium distribution...
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water s interfacial hydrogen Bonding Structure reveals the effective strength of surface water interactions
arXiv: Soft Condensed Matter, 2018Co-Authors: Sucheol Shin, Adam P WillardAbstract:The interactions of a hydrophilic surface with water can significantly influence the characteristics of the liquid water interface. In this manuscript, we explore this influence by studying the molecular Structure of liquid water at a disordered surface with tunable surface-water interactions. We combine all-atom molecular dynamics simulations with a mean field model of interfacial hydrogen Bonding to analyze the effect of surface-water interactions on the structural and energetic properties of the liquid water interface. We find that the molecular Structure of water at a weakly interacting (i.e., hydrophobic) surface is resistant to change unless the strength of surface-water interactions are above a certain threshold. We find that below this threshold water's interfacial Structure is homogeneous and insensitive to the details of the disordered surface, however, above this threshold water's interfacial Structure is heterogeneous. Despite this heterogeneity, we demonstrate that the equilibrium distribution of molecular orientations can be used to quantify the energetic component of the surface-water interactions that contribute specifically to modifying the interfacial hydrogen Bonding network. We identify this specific energetic component as a new measure of hydrophilicity, which we refer to as the intrinsic hydropathy.
Haitang Liu - One of the best experts on this subject based on the ideXlab platform.
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the hydration mechanism and hydrogen Bonding Structure of 6 carboxylate chitooligosaccharides superabsorbent material prepared by laccase tempo oxidation system
Carbohydrate Polymers, 2018Co-Authors: Jicheng Pei, Fangdong Zhang, Haitang Liu, Zhimin Zhou, Xiaoqin Zhen, Jing Wang, Xinli Zhang, Huifang ChanAbstract:Abstract 6-carboxylate chitooligosaccharides (6-CCOS), as a superabsorbent material, were prepared by way of the laccase/TEMPO oxidation system. It exhibited a higher moisture-absorption ability and stronger affinity for water. To understand the real reasons for this, the hydrogen Bonding Structure of 6-CCOS and the hydration mechanism of the molecule were investigated using infrared (IR), differential scanning calorimetry (DSC), and nuclear magnetic resonance (NMR). It was found that the introduction of a strongly hydrophilic carboxylate ion on the C6 site of chitooligosaccharides molecule was conducive to the enhancement of the interaction between polysaccharide polymers and water molecules. The most important was the formation of hydrogen bonds connected between carboxylate ion and residual water. In addition, the hydration mechanism of 6-CCOS molecules was presumed to be that more water molecules from outside were incorporated into the already embedded water molecules within the polymer. The whole molecule was woven into a huge water-polymer network Structure through intermolecular hydrated hydrogen bonds.
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The hydration mechanism and hydrogen Bonding Structure of 6-carboxylate chitooligosaccharides superabsorbent material prepared by laccase/TEMPO oxidation system.
Carbohydrate Polymers, 2018Co-Authors: Jicheng Pei, Fangdong Zhang, Haitang Liu, Zhimin Zhou, Xiaoqin Zhen, Jing Wang, Xinli Zhang, Huifang ChanAbstract:Abstract 6-carboxylate chitooligosaccharides (6-CCOS), as a superabsorbent material, were prepared by way of the laccase/TEMPO oxidation system. It exhibited a higher moisture-absorption ability and stronger affinity for water. To understand the real reasons for this, the hydrogen Bonding Structure of 6-CCOS and the hydration mechanism of the molecule were investigated using infrared (IR), differential scanning calorimetry (DSC), and nuclear magnetic resonance (NMR). It was found that the introduction of a strongly hydrophilic carboxylate ion on the C6 site of chitooligosaccharides molecule was conducive to the enhancement of the interaction between polysaccharide polymers and water molecules. The most important was the formation of hydrogen bonds connected between carboxylate ion and residual water. In addition, the hydration mechanism of 6-CCOS molecules was presumed to be that more water molecules from outside were incorporated into the already embedded water molecules within the polymer. The whole molecule was woven into a huge water-polymer network Structure through intermolecular hydrated hydrogen bonds.