X-Ray Synchrotron Study of Liquid-Vapor Interfaces at Short Length Scales: Effect of Long-Range Forces and Bending Energies

Mora, Serge; Daillant, Jean; Mecke, Klaus; Luzet, D.; Braslau, A.; Alba, M.; Struth, Bernd

doi:10.1103/physrevlett.90.216101

Cited by 90 publications

(94 citation statements)

References 20 publications

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“…Additionally, if this roughness is correlated over a significant length scale it would cause an increased diffuse scattering intensity at large q xy . This has indeed been observed for the free surface of water and several other liquids [42,43] and can be accounted for by a wave vector dependent surface tension [44], which has a reduced value for the corresponding length scales. This could be the cause of the observed potential dependent roughness deviation, since the observed increase in the electron density of the first layer would most likely significantly influence such small scale roughness phenomena.…”

Section: Discussionmentioning

confidence: 91%

Temperature- and potential-dependent structure of the mercury-electrolyte interface

Runge¹,

Festersen²,

Koops³

et al. 2016

Phys. Rev. B

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The atomic-scale structure of the mercury-electrolyte (0.01 M NaF) interface was studied as a function of temperature and potential by x-ray reflectivity and x-ray diffuse scattering measurements. The capillary wave contribution is determined and removed from the data, giving access to the intrinsic surface-normal electron density profile at the interface, especially to the surface layering in the Hg phase. A temperature dependent roughness anomaly known from the Hg-air interface is found to persist also at the Hg-electrolyte interface. Additionally, a temperature dependence of the layering period was discovered. The increase in the layer spacing with increasing temperature is approximately four times lager than the increase expected from thermal expansion. Finally, the interface is found to broaden towards the electrolyte side as the potential becomes more negative, in agreement with the Schmickler-Henderson theory. Our results favor a model for the interface structure, which is different to the model formerly used in comparable studies.

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Section: Discussionmentioning

confidence: 91%

Temperature- and potential-dependent structure of the mercury-electrolyte interface

Runge¹,

Festersen²,

Koops³

et al. 2016

Phys. Rev. B

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“…In contrast, there have been claims of enhanced CWs, i.e. γ(q) < γ o based on experimental [36], theoretical [9] and computer simulations results [17,19]. The common factor in all these κ < 0 estimations is that the intrinsic surface is (explicitly or implicitly) defined in terms of the one-particle operatorρ(r) = i δ(r − r i ).…”

Section: The Spectrum Of Cwmentioning

confidence: 99%

“…From the experimental side, the X-ray reflectivity gives direct access to the mean density profile ρ(z; A o ) over an effective area that may be calculated from the geometry of the experimental setup, and the leading term S(q) = kT /(γ o q 2 ) + ... may be identified in the diffuse scattering from liquid surfaces [5]. The bending modulus term, κ, requires to take out the bulk contribution in the diffuse scattering, to get the surface structure factor, which is done by subtracting the off-plane signal from that on the specular plane [36]. This approach involves nonetheless subtle calculations with the shape and orientation of the detector as variables [5].…”

Section: The Spectrum Of Cwmentioning

confidence: 99%

Intrinsic profiles and the structure of liquid surfaces

Tarazona

Chacón

Bresme

2012

J. Phys.: Condens. Matter

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We present a brief review of the advances made in the characterization of liquid surfaces during the last decade. We focus particularly on the links between the capillary wave theory, the density functional formalism and the direct evaluation of the intrinsic density profiles from computer simulations. A new perspective of the liquid surfaces is appearing, with a sharper view of their molecular structure, which opens new challenges for theoretical and experimental studies. Novel results on the intrinsic interfacial structure of molten salts liquidvapor interfaces are presented.

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“…Experimentally, this transition was observed in XPCS experiments by decreasing the temperature in a water glycerol solution [12]. At the small length scale probed by X-ray, the dependency of the surface tension on the scattering vector was evaluated and a debate with theoretical predictions is currently in progress [13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Dynamics at the air-water interface revealed by evanescent wave light scattering

et al. 2009

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Abstract.A new tool to study surface phenomena by evanescent wave light scattering is employed for an investigation of an aqueous surface through the water phase. When the angle of incidence passes the critical angle of total internal reflection, a high and narrow scattering peak is observed. It is discussed as an enhancement of scattering at critical angle illumination. Peak width and height are affected by the interfacial profile and the focusing of the beam. In addition, the propagation of capillary waves was studied at the surface of pure water and in the presence of latex particles and amphiphilic diblock copolymers. The range of the scattering vectors where propagating surface waves were detected is by far wider than standard surface quasi-elastic light scattering (SQELS) and comparable with those of X-ray photon correlation spectroscopy (XPCS).

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X-Ray Synchrotron Study of Liquid-Vapor Interfaces at Short Length Scales: Effect of Long-Range Forces and Bending Energies

Cited by 90 publications

References 20 publications

Temperature- and potential-dependent structure of the mercury-electrolyte interface

Temperature- and potential-dependent structure of the mercury-electrolyte interface

Intrinsic profiles and the structure of liquid surfaces

Dynamics at the air-water interface revealed by evanescent wave light scattering

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