The Experts below are selected from a list of 1848 Experts worldwide ranked by ideXlab platform
Bin Dong - One of the best experts on this subject based on the ideXlab platform.
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Micellization of Pluronic P123 in Water/Ethanol/Turpentine Oil Mixed Solvents: Hybrid Particle–Field Molecular Dynamic Simulation
Polymers, 2019Co-Authors: Ying Zhao, Antonio De Nicola, Bin DongAbstract:The hybrid particle–field molecular dynamics simulation method (MD-SCF) was applied to study the self-assembly of Pluronic PEO20-PPO70-PEO20 (P123) in water/ethanol/Turpentine Oil- mixed solvents. In particular, the micellization process of P123 at low concentration (less than 20%) in water/ethanol/Turpentine Oil-mixed solvents was investigated. The aggregation number, radius of gyration, and radial density profiles were calculated and compared with experimental data to characterize the structures of the micelles self-assembled from P123 in the mixed solvent. This study confirms that the larger-sized micelles are formed in the presence of ethanol, in addition to the Turpentine Oil-swollen micelles. Furthermore, the spherical micelles and vesicles were both observed in the self-assembly of P123 in the water/ethanol/Turpentine Oil-mixed solvent. The results of this work aid the understanding of the influence of ethanol and Oil on P123 micellization, which will help with the design of effective copolymer-based formulations.
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micellization of pluronic p123 in water ethanol Turpentine Oil mixed solvents hybrid particle field molecular dynamic simulation
Polymers, 2019Co-Authors: Ying Zhao, Antonio De Nicola, Bin DongAbstract:The hybrid particle–field molecular dynamics simulation method (MD-SCF) was applied to study the self-assembly of Pluronic PEO20-PPO70-PEO20 (P123) in water/ethanol/Turpentine Oil- mixed solvents. In particular, the micellization process of P123 at low concentration (less than 20%) in water/ethanol/Turpentine Oil-mixed solvents was investigated. The aggregation number, radius of gyration, and radial density profiles were calculated and compared with experimental data to characterize the structures of the micelles self-assembled from P123 in the mixed solvent. This study confirms that the larger-sized micelles are formed in the presence of ethanol, in addition to the Turpentine Oil-swollen micelles. Furthermore, the spherical micelles and vesicles were both observed in the self-assembly of P123 in the water/ethanol/Turpentine Oil-mixed solvent. The results of this work aid the understanding of the influence of ethanol and Oil on P123 micellization, which will help with the design of effective copolymer-based formulations.
Ying Zhao - One of the best experts on this subject based on the ideXlab platform.
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Micellization of Pluronic P123 in Water/Ethanol/Turpentine Oil Mixed Solvents: Hybrid Particle–Field Molecular Dynamic Simulation
Polymers, 2019Co-Authors: Ying Zhao, Antonio De Nicola, Bin DongAbstract:The hybrid particle–field molecular dynamics simulation method (MD-SCF) was applied to study the self-assembly of Pluronic PEO20-PPO70-PEO20 (P123) in water/ethanol/Turpentine Oil- mixed solvents. In particular, the micellization process of P123 at low concentration (less than 20%) in water/ethanol/Turpentine Oil-mixed solvents was investigated. The aggregation number, radius of gyration, and radial density profiles were calculated and compared with experimental data to characterize the structures of the micelles self-assembled from P123 in the mixed solvent. This study confirms that the larger-sized micelles are formed in the presence of ethanol, in addition to the Turpentine Oil-swollen micelles. Furthermore, the spherical micelles and vesicles were both observed in the self-assembly of P123 in the water/ethanol/Turpentine Oil-mixed solvent. The results of this work aid the understanding of the influence of ethanol and Oil on P123 micellization, which will help with the design of effective copolymer-based formulations.
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micellization of pluronic p123 in water ethanol Turpentine Oil mixed solvents hybrid particle field molecular dynamic simulation
Polymers, 2019Co-Authors: Ying Zhao, Antonio De Nicola, Bin DongAbstract:The hybrid particle–field molecular dynamics simulation method (MD-SCF) was applied to study the self-assembly of Pluronic PEO20-PPO70-PEO20 (P123) in water/ethanol/Turpentine Oil- mixed solvents. In particular, the micellization process of P123 at low concentration (less than 20%) in water/ethanol/Turpentine Oil-mixed solvents was investigated. The aggregation number, radius of gyration, and radial density profiles were calculated and compared with experimental data to characterize the structures of the micelles self-assembled from P123 in the mixed solvent. This study confirms that the larger-sized micelles are formed in the presence of ethanol, in addition to the Turpentine Oil-swollen micelles. Furthermore, the spherical micelles and vesicles were both observed in the self-assembly of P123 in the water/ethanol/Turpentine Oil-mixed solvent. The results of this work aid the understanding of the influence of ethanol and Oil on P123 micellization, which will help with the design of effective copolymer-based formulations.
Antonio De Nicola - One of the best experts on this subject based on the ideXlab platform.
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Micellization of Pluronic P123 in Water/Ethanol/Turpentine Oil Mixed Solvents: Hybrid Particle–Field Molecular Dynamic Simulation
Polymers, 2019Co-Authors: Ying Zhao, Antonio De Nicola, Bin DongAbstract:The hybrid particle–field molecular dynamics simulation method (MD-SCF) was applied to study the self-assembly of Pluronic PEO20-PPO70-PEO20 (P123) in water/ethanol/Turpentine Oil- mixed solvents. In particular, the micellization process of P123 at low concentration (less than 20%) in water/ethanol/Turpentine Oil-mixed solvents was investigated. The aggregation number, radius of gyration, and radial density profiles were calculated and compared with experimental data to characterize the structures of the micelles self-assembled from P123 in the mixed solvent. This study confirms that the larger-sized micelles are formed in the presence of ethanol, in addition to the Turpentine Oil-swollen micelles. Furthermore, the spherical micelles and vesicles were both observed in the self-assembly of P123 in the water/ethanol/Turpentine Oil-mixed solvent. The results of this work aid the understanding of the influence of ethanol and Oil on P123 micellization, which will help with the design of effective copolymer-based formulations.
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micellization of pluronic p123 in water ethanol Turpentine Oil mixed solvents hybrid particle field molecular dynamic simulation
Polymers, 2019Co-Authors: Ying Zhao, Antonio De Nicola, Bin DongAbstract:The hybrid particle–field molecular dynamics simulation method (MD-SCF) was applied to study the self-assembly of Pluronic PEO20-PPO70-PEO20 (P123) in water/ethanol/Turpentine Oil- mixed solvents. In particular, the micellization process of P123 at low concentration (less than 20%) in water/ethanol/Turpentine Oil-mixed solvents was investigated. The aggregation number, radius of gyration, and radial density profiles were calculated and compared with experimental data to characterize the structures of the micelles self-assembled from P123 in the mixed solvent. This study confirms that the larger-sized micelles are formed in the presence of ethanol, in addition to the Turpentine Oil-swollen micelles. Furthermore, the spherical micelles and vesicles were both observed in the self-assembly of P123 in the water/ethanol/Turpentine Oil-mixed solvent. The results of this work aid the understanding of the influence of ethanol and Oil on P123 micellization, which will help with the design of effective copolymer-based formulations.
Takashi Jimbo - One of the best experts on this subject based on the ideXlab platform.
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Vertically aligned N-doped carbon nanotubes by spray pyrolysis of Turpentine Oil and pyridine derivative with dissolved ferrocene
Journal of Non-crystalline Solids, 2008Co-Authors: Pradip Ghosh, Tetsuo Soga, Rakesh A. Afre, Takashi Jimbo, Kaushik Ghosh, Yoshinori AndoAbstract:Abstract Vertically aligned nitrogen-doped carbon nanotubes were synthesized from the pyrolysis of a mixture of Turpentine Oil, 4-tert-butylpyridine (C 9 H 13 N) and ferrocene on silicon and quartz substrate in nitrogen atmosphere at 700 °C by simple spray pyrolysis technique. SEM, TEM, TGA/DTA, Raman spectroscopy, XPS and electron probe micro analysis (EPMA) techniques were used to characterize the structural analysis and composition of the as-grown N-doped carbon nanotubes. Morphology of the films was greatly affected by the nature of the substrate. From the XPS and EPMA data, it was found that nitrogen content of the nanotubes were 1.6 at.% and 2 at.% on silicon and quartz substrate, respectively. Our studies show that two different types of N atoms can be present in these materials. These are ‘pyridinic’ and ‘graphitic’ nitrogen with binding energies of 398.2 eV and 400.4 eV, respectively. Raman spectroscopy reveals that graphitization of carbon nanotubes grown on silicon is better than nanotubes grown on quartz substrate. Thermogravimetric analysis showed that the thermal stability of as-prepared nanotubes grown on silicon substrate is higher than the nanotubes deposited on quartz substrate.
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Vertically aligned carbon nanotubes from natural precursors by spray pyrolysis method and their field electron emission properties
Applied Physics A, 2008Co-Authors: Pradip Ghosh, Tetsuo Soga, Takashi Jimbo, Masaki Tanemura, M. Zamri, Ryoji Katoh, Kenji SumiyamaAbstract:Vertically aligned carbon nanotubes have been synthesized from botanical hydrocarbons: Turpentine Oil and Eucalyptus Oil on Si(100) substrate using Fe catalyst by simple spray pyrolysis method at 700°C and at atmospheric pressure. The as-grown carbon nanotubes were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), high-resolution TEM (HRTEM), thermogravimetric analysis (TGA), differential thermal analysis (DTA), and Raman spectroscopy. It was observed that nanotubes grown from Turpentine Oil have better degree of graphitization and field emission performance than eucalyptus Oil grown carbon nanotubes. The Turpentine Oil and eucalyptus Oil grown carbon nanotubes indicated that the turn-on field of about 1.7 and 1.93 V/μm, respectively, at 10 μA/cm2. The threshold field was observed to be about 2.13 and 2.9 V/μm at 1 mA/cm2 of nanotubes grown from Turpentine Oil and eucalyptus Oil respectively. Moreover, Turpentine Oil grown carbon nanotubes show higher current density in relative to eucalyptus Oil grown carbon nanotubes. The maximum current density of 15.3 mA/cm2 was obtained for ∼3 V/μm corresponding to the nanotubes grown from Turpentine Oil. The improved field emission performance was attributed to the enhanced crystallinity, fewer defects, and greater length of Turpentine Oil grown carbon nanotubes.
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Simplified synthesis of single-walled carbon nanotubes from a botanical hydrocarbon: Turpentine Oil
Journal of Alloys and Compounds, 2008Co-Authors: Pradip Ghosh, Tetsuo Soga, Rakesh A. Afre, Takashi JimboAbstract:Abstract Turpentine Oil (C10H16), a botanical hydrocarbon, has been found to be an effective precursor of single-walled carbon nanotubes (SWNTs).Single-walled carbon nanotubes were prepared by catalytic decomposition of Turpentine Oil over well-dispersed metal particles supported on high silica Y-type zeolite at 850 °C by spray pyrolysis method with a reaction time 25 min. The concentration of the each metal species (Co and Fe) was 2.5 wt% each with respect to the total weight of the supported material. The as-grown SWNTs were characterized by SEM, TEM, TGA and Raman spectroscopy. TGA analysis shows that the purity of the as-grown nanotubes was around 57%. Raman spectroscopy reveals that as-grown nanotubes are well graphitized.
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Carbon nanotubes by spray pyrolysis of Turpentine Oil at different temperatures and their studies
Microporous and Mesoporous Materials, 2006Co-Authors: Rakesh A. Afre, Tetsuo Soga, Takashi Jimbo, Mukul Kumar, Yoshinori Ando, Madhuri Sharon, Prakash R. Somani, Masayoshi UmenoAbstract:The carbon nanotubes (CNTs) synthesized by simple method of spray pyrolysis and their characteristics were investigated. Turpentine Oil: a plant based precursor was used as source of carbon and nitrogen as the carrier gas. CNTs were synthesized at different temperatures ranging from 500 to 900 °C with interval of 100 °C. At different temperatures, the characteristics of CNTs markedly changes such as crystallinity, diameter, etc. confirmed by SEM, TEM, HRTEM and Raman spectroscopy studies. The bimetallic catalyst of Co and Fe supported on silica gel particles improves the quality, quantity and uniformity of CNTs.
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Growth of vertically aligned carbon nanotubes on silicon and quartz substrate by spray pyrolysis of a natural precursor: Turpentine Oil
Chemical Physics Letters, 2005Co-Authors: Rakesh A. Afre, Tetsuo Soga, Takashi Jimbo, Mukul Kumar, Yoshinori Ando, Madhuri SharonAbstract:Abstract Vertically aligned carbon nanotubes (VACNTs) were grown by spray pyrolysis of Turpentine Oil and ferrocene mixture at 700 °C. Using this simple method, we report the successful growth of vertically aligned nanotubes of 300 μm length and diameter in the range of 50–100 nm on Si(1 0 0) substrate. The ferrocene act as an in situ Fe catalyst precursor and forming the nanosize iron particles for formation of VACNTs on Si and quartz substrates. Morphological differences between aligned carbon nanotubes grown on different substrates are studied and discussed by SEM, TEM and Raman spectroscopy characterizations.
Tetsuo Soga - One of the best experts on this subject based on the ideXlab platform.
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Vertically aligned N-doped carbon nanotubes by spray pyrolysis of Turpentine Oil and pyridine derivative with dissolved ferrocene
Journal of Non-crystalline Solids, 2008Co-Authors: Pradip Ghosh, Tetsuo Soga, Rakesh A. Afre, Takashi Jimbo, Kaushik Ghosh, Yoshinori AndoAbstract:Abstract Vertically aligned nitrogen-doped carbon nanotubes were synthesized from the pyrolysis of a mixture of Turpentine Oil, 4-tert-butylpyridine (C 9 H 13 N) and ferrocene on silicon and quartz substrate in nitrogen atmosphere at 700 °C by simple spray pyrolysis technique. SEM, TEM, TGA/DTA, Raman spectroscopy, XPS and electron probe micro analysis (EPMA) techniques were used to characterize the structural analysis and composition of the as-grown N-doped carbon nanotubes. Morphology of the films was greatly affected by the nature of the substrate. From the XPS and EPMA data, it was found that nitrogen content of the nanotubes were 1.6 at.% and 2 at.% on silicon and quartz substrate, respectively. Our studies show that two different types of N atoms can be present in these materials. These are ‘pyridinic’ and ‘graphitic’ nitrogen with binding energies of 398.2 eV and 400.4 eV, respectively. Raman spectroscopy reveals that graphitization of carbon nanotubes grown on silicon is better than nanotubes grown on quartz substrate. Thermogravimetric analysis showed that the thermal stability of as-prepared nanotubes grown on silicon substrate is higher than the nanotubes deposited on quartz substrate.
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Vertically aligned carbon nanotubes from natural precursors by spray pyrolysis method and their field electron emission properties
Applied Physics A, 2008Co-Authors: Pradip Ghosh, Tetsuo Soga, Takashi Jimbo, Masaki Tanemura, M. Zamri, Ryoji Katoh, Kenji SumiyamaAbstract:Vertically aligned carbon nanotubes have been synthesized from botanical hydrocarbons: Turpentine Oil and Eucalyptus Oil on Si(100) substrate using Fe catalyst by simple spray pyrolysis method at 700°C and at atmospheric pressure. The as-grown carbon nanotubes were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), high-resolution TEM (HRTEM), thermogravimetric analysis (TGA), differential thermal analysis (DTA), and Raman spectroscopy. It was observed that nanotubes grown from Turpentine Oil have better degree of graphitization and field emission performance than eucalyptus Oil grown carbon nanotubes. The Turpentine Oil and eucalyptus Oil grown carbon nanotubes indicated that the turn-on field of about 1.7 and 1.93 V/μm, respectively, at 10 μA/cm2. The threshold field was observed to be about 2.13 and 2.9 V/μm at 1 mA/cm2 of nanotubes grown from Turpentine Oil and eucalyptus Oil respectively. Moreover, Turpentine Oil grown carbon nanotubes show higher current density in relative to eucalyptus Oil grown carbon nanotubes. The maximum current density of 15.3 mA/cm2 was obtained for ∼3 V/μm corresponding to the nanotubes grown from Turpentine Oil. The improved field emission performance was attributed to the enhanced crystallinity, fewer defects, and greater length of Turpentine Oil grown carbon nanotubes.
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Simplified synthesis of single-walled carbon nanotubes from a botanical hydrocarbon: Turpentine Oil
Journal of Alloys and Compounds, 2008Co-Authors: Pradip Ghosh, Tetsuo Soga, Rakesh A. Afre, Takashi JimboAbstract:Abstract Turpentine Oil (C10H16), a botanical hydrocarbon, has been found to be an effective precursor of single-walled carbon nanotubes (SWNTs).Single-walled carbon nanotubes were prepared by catalytic decomposition of Turpentine Oil over well-dispersed metal particles supported on high silica Y-type zeolite at 850 °C by spray pyrolysis method with a reaction time 25 min. The concentration of the each metal species (Co and Fe) was 2.5 wt% each with respect to the total weight of the supported material. The as-grown SWNTs were characterized by SEM, TEM, TGA and Raman spectroscopy. TGA analysis shows that the purity of the as-grown nanotubes was around 57%. Raman spectroscopy reveals that as-grown nanotubes are well graphitized.
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Carbon nanotubes by spray pyrolysis of Turpentine Oil at different temperatures and their studies
Microporous and Mesoporous Materials, 2006Co-Authors: Rakesh A. Afre, Tetsuo Soga, Takashi Jimbo, Mukul Kumar, Yoshinori Ando, Madhuri Sharon, Prakash R. Somani, Masayoshi UmenoAbstract:The carbon nanotubes (CNTs) synthesized by simple method of spray pyrolysis and their characteristics were investigated. Turpentine Oil: a plant based precursor was used as source of carbon and nitrogen as the carrier gas. CNTs were synthesized at different temperatures ranging from 500 to 900 °C with interval of 100 °C. At different temperatures, the characteristics of CNTs markedly changes such as crystallinity, diameter, etc. confirmed by SEM, TEM, HRTEM and Raman spectroscopy studies. The bimetallic catalyst of Co and Fe supported on silica gel particles improves the quality, quantity and uniformity of CNTs.
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Growth of vertically aligned carbon nanotubes on silicon and quartz substrate by spray pyrolysis of a natural precursor: Turpentine Oil
Chemical Physics Letters, 2005Co-Authors: Rakesh A. Afre, Tetsuo Soga, Takashi Jimbo, Mukul Kumar, Yoshinori Ando, Madhuri SharonAbstract:Abstract Vertically aligned carbon nanotubes (VACNTs) were grown by spray pyrolysis of Turpentine Oil and ferrocene mixture at 700 °C. Using this simple method, we report the successful growth of vertically aligned nanotubes of 300 μm length and diameter in the range of 50–100 nm on Si(1 0 0) substrate. The ferrocene act as an in situ Fe catalyst precursor and forming the nanosize iron particles for formation of VACNTs on Si and quartz substrates. Morphological differences between aligned carbon nanotubes grown on different substrates are studied and discussed by SEM, TEM and Raman spectroscopy characterizations.
