A5034438029- Surfactants and Colloidal Systems
- Advanced Polymer Synthesis and Characterization
- Dendrimers and Hyperbranched Polymers
- Environmental Chemistry and Analysis
- Polymer Surface Interaction Studies
- Gold and Silver Nanoparticles Synthesis and Applications
- Analytical Chemistry and Chromatography
- Photochemistry and Electron Transfer Studies
- Nanomaterials for catalytic reactions
- Protein Interaction Studies and Fluorescence Analysis
- Crystallization and Solubility Studies
- Pickering emulsions and particle stabilization
- X-ray Diffraction in Crystallography
- Ionic liquids properties and applications
- Spectroscopy and Quantum Chemical Studies
- Force Microscopy Techniques and Applications
- Mesoporous Materials and Catalysis
- Electrostatics and Colloid Interactions
- Analytical Chemistry and Sensors
- Enhanced Oil Recovery Techniques
- Catalysis and Hydrodesulfurization Studies
- Catalytic Processes in Materials Science
- Porphyrin and Phthalocyanine Chemistry
- Luminescence and Fluorescent Materials
- Advanced Nanomaterials in Catalysis
Nara Women's University
2016-2025
National Archives and Records Administration
2019
Showa Pharmaceutical University
2007-2008
Tokyo University of Science
2002-2006
Interface (United Kingdom)
2002-2005
The University of Tokyo
2002-2003
Kumamoto University
1999-2002
Dendrimer-metal (silver, platinum, and palladium) nanocomposites are prepared in aqueous solutions containing poly(amidoamine) (PAMAM) dendrimers with surface amino groups (generations 3, 4, 5) or poly(propyleneimine) (PPI) 2, 4). The particle sizes of the metal nanoparticles obtained almost independent generation as well concentration dendrimer for both PAMAM PPI dendrimers; average silver, palladium 5.6-7.5, 1.2-1.6, 1.6-2.0 nm, respectively. It is suggested that dendrimer-metal formed by...
Gold nanoparticles were prepared in the presence of poly(amidoamine) (PAMAM) dendrimers (generations 3.0 and 5.0) or poly(propyleneimine) (PPI) 4.0) with surface amino groups by laser irradiation. UV−visible absorption, dynamic light scattering, transmission electron microscopy have been used to study formation structure nanocomposites. The reduction Au3+ ions proceeded an increase irradiation time, average diameters gold obtained tended decrease dendrimer concentration. It is suggested that...
The equilibrium and dynamic surface tension properties of a partially fluorinated quaternary ammonium salt gemini surfactant 1,2-bis[dimethyl-(3-perfluoroalkyl-2-hydroxypropyl)ammonium]ethane bromide (CnFC3-2-C3CnF, where n represents fluorocarbon chain lengths 4, 6, 8) were investigated, the effects length number chains on them discussed. plot logarithm critical micelle concentration (cmc) against for CnFC3-2-C3CnF showed linear decrease with an increase in length. On basis slope this plot,...
Novel star-shaped trimeric surfactants consisting of three quaternary ammonium linked to a tris(2-aminoethyl)amine core were synthesized. Each had two methyls and straight alkyl chain 8, 10, 12, or 14 carbons. The adsorption aggregation properties these tris(N-alkyl-N,N-dimethyl-2-ammoniumethyl)amine bromides (3CntrisQ, in which n represents carbon number) characterized by equilibrium dynamic surface tension, rheology, small-angle neutron scattering (SANS), cryogenic transmission electron...
The sugar-based gemini surfactant with peptide bonds, N,N'-bisalkyl-N,N'-bis[2-(lactobionylamide)ethyl]hexanediamide (2CnpeLac, in which n represents hydrocarbon chain lengths of 12 and 16), was synthesized by reacting adipoyl chloride the corresponding monomeric N-alkyl-N'-lactobionylethylenediamine (CnpeLac), obtained ethylenediamine alkyl bromide lactobionic acid. adsorption micellization properties CnpeLac 2CnpeLac were characterized measurement their equilibrium dynamic surface tension,...
Zwitterionic heterogemini surfactants with two hydrocarbon chains and different hydrophilic groups, N,N-dimethyl-N-[2-(N'-alkyl-N'-β-carboxypropanoylamino)ethyl]-1-alkylammonium bromides (2CnAmCa, where n represents the chain lengths of 8, 10, 12, 14), were synthesized by N,N-dimethylethylenediamine alkyl bromide, followed reaction succinic anhydride. One groups is a carboxylate anion, other an ammonium cation. Their physicochemical properties characterized measuring equilibrium dynamic...
In this study, mixtures of potassium dodecanoate (C11COOK) and diglycerol derivatives with poly(oxyethylene) (EO) or poly(oxypropylene) (PO) chains (2GlyEO9 2GlyPO9) were prepared. Their adsorption behavior at the air/water interface aggregation properties in aqueous solution investigated by using surface tension small-angle X-ray scattering analyses. Our observations revealed that concentrations above critical micelle concentration, C11COOK adsorbs desorbs from C11COOK/2GlyPO9...
Cationic gemini surfactants have promising bioapplications that are limited by the use of halides as counterions, which pose environmental and human health risks. This can be circumvented using naturally occurring, highly water-soluble, nontoxic counterions such amino acids. In this study, we synthesized novel quaternary-ammonium-salt-based cationic with glycinate counterion [2Cn(2-O-2) Gly, where n is alkyl chain length, = 10, 12, 14]. Their adsorption aggregation properties were...