High-pressure acoustic properties of glycerol studied by Brillouin spectroscopy

Jeong, Minseok; Ko, Jae‐Hyeon; Ko, Young Ho; Kim, Kwang Joo

doi:10.1016/j.physb.2015.08.040

Cited by 10 publications

(6 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…22,23 Recently, the sound velocity and density of glycerol under pressure through the transition were studied by Brillouin scattering. 24 In the present study, the pressure dependence of the Raman spectrum of glycerol between 10 and 4000 cm −1 was measured up to 11 GPa. The BP Raman intensity I(ν) is related to the imaginary part of the susceptibility χ″(ν) and the VDOS, g(ν) by the following equation,…”

Section: Pressure Dependence Of the Boson Peakmentioning

confidence: 88%

“…A similar relation was also derived from the Ioffe–Regel rule as the correlation length. Recently, the pressure dependence of V L was reported for glycerol . The value of V T is not reported in that study; we assume V T / V L = 0.493 using the observed value of V T / V L for hydrogen-bonded ice .…”

Section: Pressure Dependence Of the Boson Peakmentioning

confidence: 93%

“…In hydrogen-bonded liquids, the stronger the hydrogen bonding, the smaller is the effect of pressure on T g . Lower molecular weight alcohols at ambient pressure (e.g., methanol and n -propanol with T g near 98 K) undergo a liquid-glass transition at P g = 3 and 5 GPa, respectively. − Glycerol undergoes such a transition at a pressure P g of ∼5 GPa at room temperature. , Recently, the sound velocity and density of glycerol under pressure through the transition were studied by Brillouin scattering …”

Section: Pressure Dependence Of the Boson Peakmentioning

confidence: 99%

See 2 more Smart Citations

Pressure Dependence of the Boson Peak of Glassy Glycerol

et al. 2017

View full text Add to dashboard Cite

The pressure dependence of the boson peak (BP) of glycerol, including its behavior across the liquid-glass transition, has been studied using Raman scattering. A significant increase of the BP frequency was observed with pressure up to 11 GPa at room temperature. The pressure dependence of BP frequency ν is proportional to (1+P/P), where P and P are the pressure and a constant, respectively, consistent with a soft potential model. The characteristic length of medium range order is close in size to a cyclic trimer of glycerol molecules, as predicted by the medium range order of a BP excitation using molecular dynamics simulations, and the pressure dependence of a characteristic medium range order is nearly constant. The pressure induced structural changes in glycerol can be understood in terms of the shrinkage of voids with cyclic trimers persisting to at least 11 GPa. Pressure dependence of the intermolecular O-H stretching mode indicates that the intermolecular hydrogen bond distances gradually decrease up to the glass transition pressure of ∼5 GPa and become nearly constant in the glassy state, indicating the disappearance of free volume in the dense glass.

show abstract

Section: Pressure Dependence Of the Boson Peakmentioning

confidence: 88%

Section: Pressure Dependence Of the Boson Peakmentioning

confidence: 93%

Section: Pressure Dependence Of the Boson Peakmentioning

confidence: 99%

See 1 more Smart Citation

Pressure Dependence of the Boson Peak of Glassy Glycerol

et al. 2017

View full text Add to dashboard Cite

show abstract

“…The low FWHM at high pressures (lower than 1GHz) is reminiscent of glassy materials [38,39]. This result p. 12…”

Section: Iv1 Glass Transition Derived From Brillouin Spectroscopymentioning

confidence: 84%

On the Influence of Phase Change in Highly Loaded Frictional Contacts

et al. 2020

View full text Add to dashboard Cite

Highly loaded lubricated contacts may present a friction plateau on which the friction force becomes independent from the sliding velocity. Although this phenomenon has been known for a long-time, its physical origin remains poorly known. The present paper aims at giving further insight on the physical mechanisms triggering the friction plateau. The study specifically focuses on the influence of pressure on the physical state of the lubricant. An uncoupled experimental approach (rheology, tribology, spectrometry) has been conducted on a model lubricant. The lubricant behavior has been probed both at rest by Brillouin light scattering spectroscopy and dynamically under stationary conditions in a lubricated contact. The first experimental approach led to evidence a transition pressure associated with the lubricant glass transition, which has then been correlated to the lubricant macroscopic response in friction. We show that the onset of the plateau behavior occurs for Hertzian pressures close to the glass transition pressure, corresponding to a very small fraction of lubricant in a "nominal glassy state" within the contact.

show abstract

“…It is known that the Brillouin frequencies of the three liquids are, in fact, substantially di®erent. 21,22 The explanation of the measurement results becomes clear if we recall that the probe light, before being focused into the sample, passes through a 1 m-long piece of a single-mode optical¯ber (from the¯ber coupler). In the¯ber core, the light undergoes spontaneous Brillouin scattering in the backward direction, that is combined with the signal scattered by the sample.…”

Section: Measurement Resultsmentioning

confidence: 99%

Fiber-integrated Brillouin microspectroscopy: Towards Brillouin endoscopy

Kabakova

Xiang

Paterson

et al. 2017

J. Innov. Opt. Health Sci.

View full text Add to dashboard Cite

Brillouin imaging (BI) for micromechanical characterization of tissues and biomaterials is a fast-developing¯eld of research with a strong potential for medical diagnosis of disease-modi¯ed tissues and cells. Although the principles of BI imply its compatibility with in vivo and in situ measurements, the integration of BI with a°exible catheter, capable of reaching the region of interest within the body, is yet to be reported. Here, for the¯rst time, we experimentally investigate integration of the Brillouin spectroscope with standard optical¯ber components to achieve a Brillouin endoscope. The performance of single-¯ber and dual-¯ber endoscopes are demonstrated and analyzed. We show that a major challenge in construction of Brillouin endoscopes is the strong backward Brillouin scattering in the optical¯ber and we present a dualber geometry as a possible solution. Measurements of Brillouin spectra in test liquids (water, ethanol and glycerol) are demonstrated using the dual-¯ber endoscope and its performance is analyzed numerically with the help of a beam propagation model.

show abstract

High-pressure acoustic properties of glycerol studied by Brillouin spectroscopy

Cited by 10 publications

References 19 publications

Pressure Dependence of the Boson Peak of Glassy Glycerol

Pressure Dependence of the Boson Peak of Glassy Glycerol

On the Influence of Phase Change in Highly Loaded Frictional Contacts

Fiber-integrated Brillouin microspectroscopy: Towards Brillouin endoscopy

Contact Info

Product

Resources

About