Laser-induced capillary wave at air/liquid interfaces in time domain

Yasumoto, Kaori; Hirota, Noboru; Terazima, Masahide

doi:10.1063/1.123592

Cited by 11 publications

(9 citation statements)

References 19 publications

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“…At high temperatures, when the material has reached a liquid state, capillary forces become dominant, so that information about the surface tension can be extracted from the propagation characteristics of capillary waves. In this regime, the technique is an extension of the technique reported by Yasomoto et al [11,12] and compatible to the results obtained by Ikeda et al [13] and Behroozi et al [14,15].…”

Section: Introductionsupporting

confidence: 88%

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Thermoelastic Model for Impulsive Stimulated Scattering Monitoring the Evolution from Capillary to Rayleigh Type Wave Propagation on the Surface of Viscoelastic Materials Throughout the Glass Transition

et al. 2012

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In recent decades, the impulsive stimulated scattering (ISS) method, which is based on photothermal and photoacoustic phenomena, has been successfully used to simultaneously investigate the thermal and elastic properties in a four-wave mixing configuration, both in transmission in semitransparent materials and on reflecting surfaces of solids. In this report, an extension of the technique is proposed to study a laser-induced thermoelastic response at the free surface of glass-forming liquids. The employed all-optical configuration allows extraction of information about the acoustic shear modulus in the MHz frequency range, and hence is complementary to the classical ISS configuration in the transmission mode, which is suitable to study the relaxation of the longitudinal acoustic modulus, and to another earlier reported ISS configuration, which is exciting and probing laser-induced thermoelastic phenomena at a liquid-solid interface. A theoretical model is presented and numerically illustrated for the glass transition of glycerol, and experimentally validated for water at room temperature.

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Section: Introductionsupporting

confidence: 88%

“…ISS is a technique that has proven its value for the thermal and elastic characterization of bulk solids [26], thin coatings [27], intermediate layers in multilayered systems [28], bulk fluids [4], fluid-solid interface [6], and the free liquid surface [11][12][13]29]. In the employed ISS scheme shown in Fig.…”

Section: Methodsmentioning

confidence: 99%

Thermoelastic Model for Impulsive Stimulated Scattering Monitoring the Evolution from Capillary to Rayleigh Type Wave Propagation on the Surface of Viscoelastic Materials Throughout the Glass Transition

et al. 2012

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“…21 We expect various advantages in this method over the conventional techniques of the CW detection. For example, the tunable range of the wave number by this method could be very wide (1ϫ10 4 ϳ1ϫ10 7 m Ϫ1 ).…”

Section: Introductionmentioning

confidence: 98%

Surface and molecular dynamics at gas-liquid interfaces probed by interface-sensitive forced light scattering in the time domain

1999

Self Cite

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The forced Brillouin and Rayleigh scattering techniques under the probe reflected transient grating configuration were used to probe various dynamics at gas-liquid interfaces in the time domain over the wave-number range of 0.2ϫ10 6 ϳ2.0ϫ10 6 m Ϫ1 . From the forced Brillouin scattering signal, the temporal behaviors of the capillary wave ͑CW͒ were investigated. The observed wave does not consist of one sine or cosine wave but shows dual features. This feature was explained in terms of two mechanisms of the capillary wave creation by the photothermal effect; the thermal expansion and the temperature dependence of the surface tension. Besides the oscillatory behavior for nonviscous liquids, a heavily damped capillary wave was observed in a range of wave number above 1.6ϫ10 6 m Ϫ1 from a viscous liquid ͑1-hexanol͒ surface, which has never been detected before. The observed signals were compared with the phenomenologically expressed wave forms and the theoretically calculated wave forms based on the hydrodynamic equations. For CW on the organic liquid surface, the hydrodynamic equation predicts the observed temporal profile well, whereas the agreement is less satisfactory for CW on water surface. Using the theoretical equations, the surface motion as well as liquid motion beneath the surface under the forced light scattering condition is presented. The temporal profile of the forced Rayleigh scattering signal provides information on the thermal diffusivity and molecular movement at the surface. The thermal diffusivity at the surface region is found to be very close to that in the bulk phase, whereas the molecular motion at the surface is revealed to be faster than that in the bulk phase. The faster movement at the surface may be explained by the transverse motion of the surface by CW.

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“…The laser-induced capillary wave method was utilized for the optical viscometry. Terazima et al (14) first demonstrated the laser-induced capillary wave method for the investigation of surface interactions of a gas/liquid interface, and Nagasaka et al (15) have developed a bench-top-type in situ viscometer using a nano-second pulsed carbon dioxide laser for the control of industrial materials such as food. The sample surface is heated by two pulsed laser beams, which intersect and generate an optical interference fringe pattern on the surface.…”

Section: Laser-induced Capillary Wave Methodsmentioning

confidence: 99%

Micro Optical Viscosity Sensor for in situ Measurement Based on a Laser-Induced Capillary Wave

Taguchi

Nagamachi

Nagasaka

2009

JTST

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In this article, we demonstrate a novel micro optical viscosity sensor (MOVS) based on a laser-induced capillary wave with a focus control system that enables in situ monitoring of viscosity and surface tension changes in microliter-order liquid samples such as body fluids, polymer coating materials, lubricants, heavy oils and so on. The microfabricated sensor consists of two deep trenches (depth of 273 µm) holding photonic crystal fibers (PCFs), and three shallow trenches (depth of 125 µm) holding collimating lensed fibers (CLFs) for the probing laser. The capillary wave is excited by two pulsed laser beams generating optical interference, and the rapid motion of the capillary wave, which contains information regarding the viscosity and surface tension of the sample, is monitored by detecting the first-order diffracted beam of the probing laser irradiated onto the sample surface. In order to apply this sensor in manufacturing and clinical settings, the distance between the liquid level and the sensor must be properly adjusted because the sample surface is strongly influenced by evaporation and outside vibration disturbances under such conditions. In the MOVS, the specular reflection of the probing laser is detected by a symmetrically placed collimating lensed fiber. Maximizing the signal of specular reflection by using a piezo stage connected to the MOVS and PID controller, the focal points of the fibers (PCFs and CLFs) are adjusted on the sample surface. The high-reproducible measurement results under evaporation and outside disturbance indicate the validity of MOVS for in situ application.

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Laser-induced capillary wave at air/liquid interfaces in time domain

Cited by 11 publications

References 19 publications

Thermoelastic Model for Impulsive Stimulated Scattering Monitoring the Evolution from Capillary to Rayleigh Type Wave Propagation on the Surface of Viscoelastic Materials Throughout the Glass Transition

Thermoelastic Model for Impulsive Stimulated Scattering Monitoring the Evolution from Capillary to Rayleigh Type Wave Propagation on the Surface of Viscoelastic Materials Throughout the Glass Transition

Surface and molecular dynamics at gas-liquid interfaces probed by interface-sensitive forced light scattering in the time domain

Micro Optical Viscosity Sensor for in situ Measurement Based on a Laser-Induced Capillary Wave

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