scholarly journals Self-Propelled Motion of Micrometer-Sized Oil Droplets in Aqueous Solution of Surfactant

10.5772/67249 ◽  
2017 ◽  
Author(s):  
Taisuke Banno ◽  
Taro Toyota ◽  
Kouichi Asakura
Keyword(s):  
Aqueous Solution ◽  
Oil Droplets

Cell-Mimicry Behaviors of Micrometer-Sized Oil Droplets in Aqueous Solution

2018 ◽  
Author(s):  
Taisuke Banno ◽  
Taro Toyota ◽  
Kouichi Asakura
Keyword(s):  
Aqueous Solution ◽  
Oil Droplets

Zwitterionic and Charged Lipids Form Remarkably Different Structures on Nanoscale Oil Droplets in Aqueous Solution

Langmuir ◽  
2017 ◽  
Vol 34 (3) ◽  
pp. 1042-1050 ◽  
Author(s):  
Yixing Chen ◽  
Halil I. Okur ◽  
Cornelis Lütgebaucks ◽  
Sylvie Roke
Keyword(s):  
Aqueous Solution ◽  
Oil Droplets

scholarly journals Run-and-Halt Behavior of Motile Droplets in Response to Light

2021 ◽  
Author(s):  
Alexander Ryabchun ◽  
Dhanya Babu ◽  
Jacopo Movilli ◽  
Rémi Plamont ◽  
Nathalie Katsonis
Keyword(s):  
Aqueous Solution ◽  
Visible Light ◽  
Water Droplet ◽  
Uv Light ◽  
Molecular Switch ◽  
Oil Droplets ◽  
Motility Pattern ◽  
Droplet Movement ◽  
Better Than

<p>We report the run-and-halt behavior of motile droplets immersed in an aqueous solution of amphiphilic molecular switch. These oil droplets move autonomously as the switch solubilizes the oil into the water. Droplet movement stops in response to UV light, and picks up again in response to visible light. This motile behavior is a consequence of the reversible <i>trans-</i>to-<i>cis</i> photo-conversion of the switch in water, because the <i>trans</i> photo-isomer stabilizes the oil droplets better than the <i>cis</i> photo-isomer, and therefore it also solubilizes the droplet more effectively. Notably, the droplets also evolve positive photokinesis under illumination with visible light, and, in patchy light environments, their complex motility pattern directs the droplets at the periphery of the illuminated areas. </p>

Investigation of molecular partitioning between non polar oil droplets and aqueous solution using double potential step chronoamperometry

2014 ◽  
Vol 16 (22) ◽  
pp. 10456-10463 ◽  
Author(s):  
Jonathan C. Newland ◽  
Patrick R. Unwin ◽  
Julie V. Macpherson
Keyword(s):  
Aqueous Solution ◽  
Oil Droplets ◽  
Factors Affecting ◽  
Potential Step ◽  
Solid Interface ◽  
Oil Water ◽  
Polar Oil ◽  
Double Potential Step Chronoamperometry

Factors affecting partitioning of an electrogenerated species, Br2 from Br−, into non-polar oil microdroplets at the oil–water–solid interface are investigated using double potential step chronoamperometry.

scholarly journals Run-and-Halt Behavior of Motile Droplets in Response to Light

2021 ◽  
Author(s):  
Alexander Ryabchun ◽  
Dhanya Babu ◽  
Jacopo Movilli ◽  
Rémi Plamont ◽  
Nathalie Katsonis
Keyword(s):  
Aqueous Solution ◽  
Visible Light ◽  
Water Droplet ◽  
Uv Light ◽  
Molecular Switch ◽  
Oil Droplets ◽  
Motility Pattern ◽  
Droplet Movement ◽  
Better Than

<p>We report the run-and-halt behavior of motile droplets immersed in an aqueous solution of amphiphilic molecular switch. These oil droplets move autonomously as the switch solubilizes the oil into the water. Droplet movement stops in response to UV light, and picks up again in response to visible light. This motile behavior is a consequence of the reversible <i>trans-</i>to-<i>cis</i> photo-conversion of the switch in water, because the <i>trans</i> photo-isomer stabilizes the oil droplets better than the <i>cis</i> photo-isomer, and therefore it also solubilizes the droplet more effectively. Notably, the droplets also evolve positive photokinesis under illumination with visible light, and, in patchy light environments, their complex motility pattern directs the droplets at the periphery of the illuminated areas. </p>

Structures Formed by Cryoprotective Agents Used in Freezc-Etching

1971 ◽  
Vol 29 ◽  
pp. 448-449
Author(s):  
G. G. Cocks ◽  
C. E. Cluthe
Keyword(s):  
Aqueous Solution ◽  
Polyethylene Oxide ◽  
Liquid Nitrogen Temperature ◽  
Ice Crystals ◽  
Etching Technique ◽  
Structural Constituent ◽  
Cryoprotective Agents ◽  
Quick Freezing ◽  
Freeze Etching ◽  
Fractured Surface

The freeze etching technique is potentially useful for examining dilute solutions or suspensions of macromolecular materials. Quick freezing of aqueous solutions in Freon or propane at or near liquid nitrogen temperature produces relatively large ice crystals and these crystals may damage the structures to be examined. Cryoprotective agents may reduce damage to the specimem, hut their use often results in the formation of a different set of specimem artifacts.In a study of the structure of polyethylene oxide gels glycerol and sucrose were used as cryoprotective agents. The experiments reported here show some of the structures which can appear when these cryoprotective agents are used.Figure 1 shows a fractured surface of a frozen 25% aqueous solution of sucrose. The branches of dendritic ice crystals surrounded hy ice-sucrose eutectic can be seen. When this fractured surface is etched the ice in the dendrites sublimes giving the type of structure shown in Figure 2. The ice-sucrose eutectic etches much more slowly. It is the smooth continuous structural constituent surrounding the branches of the dendrites.

Preparation and characterisation of vanadium pentoxide supported rhodium catalyst

1988 ◽  
Vol 46 ◽  
pp. 946-947
Author(s):  
A. Legrouri
Keyword(s):  
Aqueous Solution ◽  
Thermal Decomposition ◽  
Physicochemical Properties ◽  
Surface Area ◽  
Vanadium Pentoxide ◽  
High Purity ◽  
Gas Adsorption ◽  
Rhodium Catalyst ◽  
Optical Methods ◽  
Reducible Oxides

The industrial importance of metal catalysts supported on reducible oxides has stimulated considerable interest during the last few years. This presentation reports on the study of the physicochemical properties of metallic rhodium supported on vanadium pentoxide (Rh/V2O5). Electron optical methods, in conjunction with other techniques, were used to characterise the catalyst before its use in the hydrogenolysis of butane; a reaction for which Rh metal is known to be among the most active catalysts.V2O5 powder was prepared by thermal decomposition of high purity ammonium metavanadate in air at 400 °C for 2 hours. Previous studies of the microstructure of this compound, by HREM, SEM and gas adsorption, showed it to be non— porous with a very low surface area of 6m2/g3. The metal loading of the catalyst used was lwt%Rh on V2Q5. It was prepared by wet impregnating the support with an aqueous solution of RhCI3.3H2O.

TEM observation of iron oxide pillars in montmorillonite

1990 ◽  
Vol 48 (4) ◽  
pp. 882-883
Author(s):  
H. Mori ◽  
Y. Murata ◽  
H. Yoneyama ◽  
H. Fujita
Keyword(s):  
Aqueous Solution ◽  
Iron Oxide ◽  
Fine Particles ◽  
Aqueous Suspension ◽  
Volume Ratio ◽  
Exchange Capacity ◽  
Nano Composites ◽  
Pillared Montmorillonite ◽  
Topographic Features ◽  
Transmission Electron

Recently, a new sort of nano-composites has been prepared by incorporating such fine particles as metal oxide microcrystallites and organic polymers into the interlayer space of montmorillonite. Owing to their extremely large specific surface area, the nano-composites are finding wide application[1∼3]. However, the topographic features of the microstructures have not been elucidated as yet In the present work, the microstructures of iron oxide-pillared montmorillonite have been investigated by high-resolution transmission electron microscopy.Iron oxide-pillared montmorillonite was prepared through the procedure essentially the same as that reported by Yamanaka et al. Firstly, 0.125 M aqueous solution of trinuclear acetato-hydroxo iron(III) nitrate, [Fe3(OCOCH3)7 OH.2H2O]NO3, was prepared and then the solution was mixed with an aqueous suspension of 1 wt% clay by continuously stirring at 308 K. The final volume ratio of the latter aqueous solution to the former was 0.4. The clay used was sodium montmorillonite (Kunimine Industrial Co.), having a cation exchange capacity of 100 mequiv/100g. The montmorillonite in the mixed suspension was then centrifuged, followed by washing with deionized water. The washed samples were spread on glass plates, air dried, and then annealed at 673 K for 72 ks in air. The resultant film products were approximately 20 μm in thickness and brown in color.

Sign in / Sign up

Export Citation Format

Share Document