Electric field tweezers for characterization of liquid surface

Sakai, Keiji; Yamamoto, Yuki

doi:10.1063/1.2387864

Cited by 33 publications

(26 citation statements)

References 21 publications

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“…The direct observation of the skin layer would be possible by an optical microscopy or rheological measurement with a good vertical resolution. 49,50) …”

Section: Resultsmentioning

confidence: 99%

Dynamics of Drying Process of Polymer Solution Droplets: Analysis of Polymer Transport and Control of Film Profiles

Kajiya

Doi

2011

J. Soc. Rheol., Jpn

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We report a series of experimental works about the drying process of polymer solution droplets. Our aims are to analyze the local polymer transport in the drying droplet and to precisely control the profile of polymer film formed after the droplet dries up. For the analysis of the polymer transport, we have established a dynamical observation method for the polymer concentration field by combining the fluorescence microscopy with the lateral profile observation. We observed that a large spatial inhomogeneity of the polymer concentration grows inside the droplet which is caused by the outward capillary flow. For the control of the film profile, we proposed two methods: adding the small amount of surfactant and switching between the solvent evaporation and condensation. These two processes enable us to make a polymer film having a flat profile. Our results propose effective suggestions for controlling the fabrication process of polymer films in inkjet-printing technologies.

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“…The direct observation of the skin layer would be possible by an optical microscopy or rheological measurement with a good vertical resolution. 49,50) …”

Section: Resultsmentioning

confidence: 99%

Dynamics of Drying Process of Polymer Solution Droplets: Analysis of Polymer Transport and Control of Film Profiles

Kajiya

Doi

2011

J. Soc. Rheol., Jpn

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“…8 In the present study, simpler relations are valid because a dc electric field is applied and thus the deformation is static.…”

Section: Analysis Of Displacement Of Liquid Surfacementioning

confidence: 99%

“…8 or by the drop weight method. We already found inhomogeneous reactions and phenomena at interfaces, which were observable only by in situ optical microscopy, 14,15,17 and therefore microscopic imaging tools are necessary for measurements for surface or interface of solutions.…”

Section: Estimation Of Surface Tension Of Sds Solutionmentioning

confidence: 99%

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Microscopic Measurements of Deformation of Liquid Surfaces Induced by Localized Direct Current Electric Field

2008

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This study presents a new microscopic method for the measurements of the deformation of liquid surfaces induced by a localized direct current (dc) electric field in a noncontact manner. Since the dielectric constant of aqueous and organic liquids is larger than that of air, the liquids tend to occupy a space with a stronger electric field. The horizontal level of transparent surfaces was measured with a constructed microscopic system that possessed a resolution of about 2 μm. When a rod electrode (2.0 mm in radius) was brought near to a liquid surface vertically within 150 -200 μm and a dc voltage (50 -75 V) was applied, the surface just under the electrode rose by 4 -19 μm. The deformation of the liquid surfaces was quantitatively analyzed by using a dielectric force, surface tension, and hydrostatic pressure.

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“…From this point of view, Sakai et al 6) have developed the electric-field tweezers method to measure the viscosity of soft condensed matters in a noncontact manner. In this method, the Maxwell stress applied by a needle electrode deforms the surface.…”

Section: Introductionmentioning

confidence: 99%

Noncontact Measurement of Viscosity of B2O3 Melt Using Electric-field Tweezers

Fujino¹,

Inaba²,

Kajiwara³

et al. 2011

J. Soc. Rheol., Jpn

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We propose a novel noncontact method for measuring the viscosity of high-temperature glass melt using a small amount of sample. This method combines the electric-field tweezers system developed for measuring the local and dynamic surface properties of soft condensed materials and the hot-thermocouple technique for in situ observation and measurement of high-temperature liquids. The viscosity of B 2 O 3 melt was measured in the temperature range of 873 to 1473 K. The temperature dependence of the viscosity presented in this work is in reasonable agreement with that reported in the references.

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Electric field tweezers for characterization of liquid surface

Cited by 33 publications

References 21 publications

Dynamics of Drying Process of Polymer Solution Droplets: Analysis of Polymer Transport and Control of Film Profiles

Dynamics of Drying Process of Polymer Solution Droplets: Analysis of Polymer Transport and Control of Film Profiles

Microscopic Measurements of Deformation of Liquid Surfaces Induced by Localized Direct Current Electric Field

Noncontact Measurement of Viscosity of B2O3 Melt Using Electric-field Tweezers

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