Long range interactions in nanoscale science

French, Roger H.; Parsegian, V. Adrian; Podgornik, Rudolf; Rajter, Rick F.; Jagota, Anand; Luo, Jian; Asthagiri, D.; Chaudhury, Manoj K.; Chiang, Yet Ming; Granick, Steve; Kalinin, Sergei V.; Kardar, Mehran; Kjellander, Roland; Langreth, David C.; Lewis, Jennifer A.; Lustig, Steven R.; Wesolowski, David J.; Wettlaufer, J. S.; Ching, W. Y.; Finnis, Michael W.; Houlihan, F. M.; Lilienfeld, O. Anatole von; Oss, Carel J. van; Zemb, Thomas

doi:10.1103/revmodphys.82.1887

Cited by 391 publications

(363 citation statements)

References 446 publications

(149 reference statements)

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“…As an additional complication, finite LJ cutoffs are used in MD simulation force fields and give rise to cutoff artifacts at large surface separations (see SI Text for more details). Obviously, simulations will have to be combined with continuum modeling to make progress in understanding wet adhesion properties (34).…”

Section: Discussionmentioning

confidence: 99%

From hydration repulsion to dry adhesion between asymmetric hydrophilic and hydrophobic surfaces

Kanduč

Netz

2015

Proc. Natl. Acad. Sci. U.S.A.

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Using all-atom molecular dynamics (MD) simulations at constant water chemical potential in combination with basic theoretical arguments, we study hydration-induced interactions between two overall chargeneutral yet polar planar surfaces with different wetting properties. Whether the water film between the two surfaces becomes unstable below a threshold separation and cavitation gives rise to long-range attraction, depends on the sum of the two individual surface contact angles. Consequently, cavitation-induced attraction also occurs for a mildly hydrophilic surface interacting with a very hydrophobic surface. If both surfaces are very hydrophilic, hydration repulsion dominates at small separations and direct attractive force contribution can-if strong enough-give rise to wet adhesion in this case. In between the regimes of cavitation-induced attraction and hydration repulsion we find a narrow range of contact angle combinations where the surfaces adhere at contact in the absence of cavitation. This dry adhesion regime is driven by direct surface-surface interactions. We derive simple laws for the cavitation transition as well as for the transition between hydration repulsion and dry adhesion, which favorably compare with simulation results in a generic adhesion state diagram as a function of the two surface contact angles.A ccording to the classical Derjaguin-Landau-Verwey-Overbeek (DLVO) theory, the interaction between hydrated surfaces is given by the sum of van der Waals (vdW) and screened electrostatic interactions (1). Although this approach works well in many situations, subnanometer resolved force measurements between individual surfaces demonstrated that additional watermediated interactions are dominant at small separations and depend crucially on the polarity or wetting properties of the surfaces (2-4). Understanding these solvation-induced interactions is still a central issue in all fields concerned with forces between surfaces, colloids, and macromolecular aggregates in water.As is well known, the water film between two hydrophobic surfaces, characterized by water contact angles θ > 90°, becomes freeenergetically unstable below a critical distance and in equilibrium cavitation leads to vapor bubble-induced long-ranged attraction (5-7). Conversely, polar and overall neutral surfaces, characterized by small or vanishing contact angles, exhibit pronounced shortranged repulsive forces, which decay exponentially with a characteristic length in the subnanometer range (8-11). These so-called hydration forces arise from the complex interplay of surface group configurational degrees of freedom, desorption of hydration water from polar surface groups, and ordering of the intersurface water film (4). The understanding of hydration forces has recently been advanced by computer simulations that include explicit water molecules (12)(13)(14).In the absence of direct surface-surface interactions, the transition between cavitation-induced attraction and hydration repulsion should coincide with the contact angle char...

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Section: Discussionmentioning

confidence: 99%

From hydration repulsion to dry adhesion between asymmetric hydrophilic and hydrophobic surfaces

Kanduč

Netz

2015

Proc. Natl. Acad. Sci. U.S.A.

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“…The fluctuation-induced phenomena and, specifically, the van der Waals and Casimir forces, play a progressively increasing role in many topics of physics, chemistry and biology (see the monographs [1,2] and reviews [3,4,5,6]. They are responsible for interaction of electrically neutral, but polarizable, particles with material surfaces [7,8,9,10], find applications in nanoscience [11,12,13,14], play important role in many effects of condensed matter physics [15,16,17,18,19,20], and are even used in elementary particle physics for constraining some theoretical predictions beyond the standard model [21,22,23].…”

Section: Introductionmentioning

confidence: 99%

Casimir free energy of dielectric films: classical limit, low-temperature behavior and control

Mostepanenko¹

2017

J. Phys.: Condens. Matter

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Abstract. The Casimir free energy of dielectric films, both free-standing in vacuum and deposited on metallic or dielectric plates, is investigated. It is shown that the values of the free energy depend considerably on whether the calculation approach used neglects or takes into account the dc conductivity of film material. We demonstrate that there are the material-dependent and universal classical limits in the former and latter cases, respectively. The analytic behavior of the Casimir free energy and entropy for a free-standing dielectric film at low temperature is found. According to our results, the Casimir entropy goes to zero when the temperature vanishes if the calculation approach with neglected dc conductivity of a film is employed. If the dc conductivity is taken into account, the Casimir entropy takes the positive value at zero temperature, depending on the parameters of a film, i.e., the Nernst heat theorem is violated. By considering the Casimir free energy of SiO 2 and Al 2 O 3 films deposited on a Au plate in the framework of two calculation approaches, we argue that physically correct values are obtained by disregarding the role of dc conductivity. A comparison with the well known results for the configuration of two parallel plates is made. Finally, we compute the Casimir free energy of SiO 2 , Al 2 O 3 and Ge films deposited on high-resistivity Si plates of different thicknesses and demonstrate that it can be positive, negative and equal to zero. The effect of illumination of a Si plate with laser light is considered. Possible applications of the obtained results to thin films used in microelectronics are discussed.

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“…If materials with Coulombic interactions are investigated [e.g., oxides, DNA (Ref. 17)], communication via atomic interactions (in addition to electric-field/lattice-deformation coupling effects) can be expected for larger vacuum-gaps.…”

Section: Phonon Transmission Coefficientsmentioning

confidence: 99%

Phonon transport across a vacuum gap

et al. 2012

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Phonon transport across a silicon/vacuum-gap/silicon structure is modeled using lattice dynamics calculations and Landauer theory. The phonons transmit thermal energy across the vacuum gap via atomic interactions between the leads. Because the incident phonons do not encounter a classically impenetrable potential barrier, this mechanism is not a tunneling phenomenon. While some incident phonons transmit across the vacuum-gap and remain in their original mode, many are annihilated and excite different modes. We show that the heat flux due to phonon transport can be four orders of magnitude larger than that due to photon transport predicted from near-field radiation theory.

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Long range interactions in nanoscale science

Cited by 391 publications

References 446 publications

From hydration repulsion to dry adhesion between asymmetric hydrophilic and hydrophobic surfaces

From hydration repulsion to dry adhesion between asymmetric hydrophilic and hydrophobic surfaces

Casimir free energy of dielectric films: classical limit, low-temperature behavior and control

Phonon transport across a vacuum gap

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