Giant Vesicle Formation from Oleic Acid/Sodium Oleate on Glass Surfaces Induced by Adsorbed Hydrocarbon Molecules

Langmuir ◽  
2002 ◽  
Vol 18 (26) ◽  
pp. 10509-10511 ◽  
Author(s):  
Kenichi Morigaki ◽  
Peter Walde
Keyword(s):  
Oleic Acid ◽  
Sodium Oleate ◽  
Vesicle Formation ◽  
Giant Vesicle ◽  
Hydrocarbon Molecules ◽  
Glass Surfaces

scholarly journals Unravelling the Thermal Decomposition Parameters for The Synthesis of Anisotropic Iron Oxide Nanoparticles

Nanomaterials ◽  
2018 ◽  
Vol 8 (11) ◽  
pp. 881 ◽  
Author(s):  
Geoffrey Cotin ◽  
Céline Kiefer ◽  
Francis Perton ◽  
Dris Ihiawakrim ◽  
Cristina Blanco-Andujar ◽  
...  
Keyword(s):  
Oleic Acid ◽  
Iron Oxide ◽  
Iron Oxide Nanoparticles ◽  
Sodium Oleate ◽  
Shape Control ◽  
Oxide Nanoparticles ◽  
Chelating Ligand ◽  
Precursor Structure ◽  
Negative Effect ◽  
Magnetic Resonance Imaging Mri

Iron oxide nanoparticles are widely used as a contrast agent in magnetic resonance imaging (MRI), and may be used as therapeutic agent for magnetic hyperthermia if they display in particular high magnetic anisotropy. Considering the effect of nanoparticles shape on anisotropy, a reproducible shape control of nanoparticles is a current synthesis challenge. By investigating reaction parameters, such as the iron precursor structure, its water content, but also the amount of the surfactant (sodium oleate) reported to control the shape, iron oxide nanoparticles with different shape and composition were obtained, in particular, iron oxide nanoplates. The effect of the surfactant coming from precursor was taking into account by using in house iron stearates bearing either two or three stearate chains and the negative effect of water on shape was confirmed by considering these precursors after their dehydration. Iron stearates with three chains in presence of a ratio sodium oleate/oleic acid 1:1 led mainly to nanocubes presenting a core-shell Fe1−xO@Fe3−xO4 composition. Nanocubes with straight faces were only obtained with dehydrated precursors. Meanwhile, iron stearates with two chains led preferentially to the formation of nanoplates with a ratio sodium oleate/oleic acid 4:1. The rarely reported flat shape of the plates was confirmed with 3D transmission electronic microscopy (TEM) tomography. The investigation of the synthesis mechanisms confirmed the major role of chelating ligand and of the heating rate to drive the cubic shape of nanoparticles and showed that the nanoplate formation would depend mainly on the nucleation step and possibly on the presence of a given ratio of oleic acid and chelating ligand (oleate and/or stearate).

Study on γ-Fe2O3 Magnetic Fluid by Thermal Oxidizing of Fe3O4 Nanoparticles

2015 ◽  
Vol 713-715 ◽  
pp. 2916-2919
Author(s):  
Hang Zheng ◽  
Hui Ping Shao ◽  
Zi Fen Zhao
Keyword(s):  
Surface Modification ◽  
Oleic Acid ◽  
Magnetic Nanoparticles ◽  
Saturation Magnetization ◽  
Sodium Oleate ◽  
Magnetic Fluid ◽  
Silicone Oil ◽  
Precipitation Method ◽  
Carrier Liquid ◽  
Co Precipitation

In this paper, Fe3O4magnetic nanoparticles were synthesized by chemical co-precipitation method and their surface was modified by sodium oleate. The γ-Fe2O3magnetic nanoparticles were achieved by thermal oxidizing of Fe3O4. The γ-Fe2O3magnetic fluid was prepared by using silicone oil as carrier liquid and oleic acid as surface modification agent, and the saturation magnetization of prepared γ-Fe2O3magnetic fluid hits 14.25emu/g.

Giant Vesicle Formation of Novel Polymerizable Amphiphile Associated with Its Polymerization and Hydrolysis in Water

2014 ◽  
Vol 43 (11) ◽  
pp. 1707-1709 ◽  
Author(s):  
Taisuke Banno ◽  
Yuki Kazayama ◽  
Taro Toyota
Keyword(s):  
Vesicle Formation ◽  
Giant Vesicle

scholarly journals Satiety from fat? Adverse effects of intestinal infusion of sodium oleate

1997 ◽  
Vol 273 (5) ◽  
pp. R1779-R1785 ◽  
Author(s):  
Israel Ramirez ◽  
Michael G. Tordoff ◽  
Mark I. Friedman
Keyword(s):  
Oleic Acid ◽  
Fatty Acid ◽  
Food Intake ◽  
Eating Behavior ◽  
Sodium Oleate ◽  
Cell Damage ◽  
Ethyl Oleate ◽  
Intestinal Lumen ◽  
Ldh Activity ◽  
Intestinal Infusion

To determine whether damage to the intestinal mucosa by oleic acid causes the suppression of food intake observed in response to intraintestinal infusion of the fatty acid, we measured lactate dehydrogenase (LDH) activity, a marker for cell damage, in the intestinal lumen after intestinal infusion of fatty acid under conditions similar to those employed in studies of eating behavior. Infusions of 25 or 51 mM sodium oleate (neutralized oleic acid) markedly and rapidly increased LDH activity, whereas infusions of saline had little or no effect. Infusion of octanoate, which has been reported to be ineffective in reducing eating behavior, did not increase intestinal LDH activity relative to saline infusion. Similarly, infusion of ethyl oleate or free (nonneutralized) oleic acid neither increased luminal LDH activity nor suppressed food intake. Infusion of sodium oleate also produced a strong conditioned aversion to sucrose. The results strongly suggest that the suppression of food intake induced by intraintestinal infusion of sodium oleate is due to the injurious effects of this unphysiological form of the fatty acid.

Giant vesicle formation through self-assembly of chitooligosaccharide-based graft copolymers

2008 ◽  
pp. 1449 ◽  
Author(s):  
Ke-Jing Gao ◽  
Guangtao Li ◽  
Xinping Lu ◽  
Y. G. Wu ◽  
Bo-Qing Xu ◽  
...  
Keyword(s):  
Self Assembly ◽  
Graft Copolymers ◽  
Vesicle Formation ◽  
Giant Vesicle

Characterization of Various Organic Coatings on Glasses

1996 ◽  
Vol 440 ◽  
Author(s):  
Donghun Lee ◽  
Robert A. Condrate
Keyword(s):  
Oleic Acid ◽  
Bond Strength ◽  
Polymethyl Methacrylate ◽  
Organic Compounds ◽  
Silica Glass ◽  
Interaction Mechanism ◽  
Organic Coatings ◽  
Glass Surfaces ◽  
Soluble Components

AbstractOrganic compounds such as oleic acid, polymethyl methacrylate (PMMA) and polyacrylate (PAA) were coated on slide and silica glass powders. The resulting interaction mechanism was determined by the leaching properties of the glass, and the bond strength of each ion on the glass with coated organics. Soluble components such as sodium and calcium play important roles in the interaction properties of the organics with glass surfaces. The effects of solvent are also discussed.

Kinetic Study on Giant Vesicle Formation with Electroformation Method

Langmuir ◽  
2009 ◽  
Vol 25 (9) ◽  
pp. 4835-4840 ◽  
Author(s):  
Toshinori Shimanouchi ◽  
Hiroshi Umakoshi ◽  
Ryoichi Kuboi
Keyword(s):  
Kinetic Study ◽  
Vesicle Formation ◽  
Giant Vesicle
Sign in / Sign up

Export Citation Format

Share Document