Surface activity and collective behaviour of colloidally stable Janus-like particles at the air–water interface

Soft Matter ◽  
2014 ◽  
Vol 10 (19) ◽  
pp. 3471 ◽  
Author(s):  
M. A. Fernández-Rodríguez ◽  
M. A. Rodríguez-Valverde ◽  
M. Cabrerizo-Vílchez ◽  
R. Hidalgo-Alvarez
Keyword(s):  
Surface Activity ◽  
Collective Behaviour ◽  
Water Interface ◽  
Air Water Interface

Surface activity of perfluorodecanoyl end-capped poly(ethylene oxide) and associated adsorption behavior to the air–water interface

Polymer ◽  
1998 ◽  
Vol 39 (19) ◽  
pp. 4655-4664 ◽  
Author(s):  
Zhaohui Su ◽  
Thomas J McCarthy ◽  
Shaw ling Hsu ◽  
Howard D Stidham ◽  
Zhongyong Fan ◽  
...  
Keyword(s):  
Ethylene Oxide ◽  
Surface Activity ◽  
Adsorption Behavior ◽  
Water Interface ◽  
Air Water Interface ◽  
Poly Ethylene Oxide ◽  
Poly Ethylene

Surface Activity and Molecular Organization of Metallacarboranes at the Air–Water Interface Revealed by Nonlinear Optics

Langmuir ◽  
2015 ◽  
Vol 31 (8) ◽  
pp. 2297-2303 ◽  
Author(s):  
Pierre-Marie Gassin ◽  
Luc Girard ◽  
Gaelle Martin-Gassin ◽  
Damien Brusselle ◽  
Alban Jonchère ◽  
...  
Keyword(s):  
Nonlinear Optics ◽  
Surface Activity ◽  
Molecular Organization ◽  
Water Interface ◽  
Air Water Interface

scholarly journals Interaction Energy Analysis of Monovalent Inorganic Anions in Bulk Water Versus Air/Water Interface

Molecules ◽  
2021 ◽  
Vol 26 (21) ◽  
pp. 6719
Author(s):  
John M. Herbert ◽  
Suranjan K. Paul
Keyword(s):  
Surface Activity ◽  
Mechanical Energy ◽  
Decomposition Analysis ◽  
Bulk Water ◽  
Active Species ◽  
Energy Decomposition Analysis ◽  
Water Interface ◽  
Surface Activities ◽  
Air Water Interface ◽  
Surface Active

Soft anions exhibit surface activity at the air/water interface that can be probed using surface-sensitive vibrational spectroscopy, but the structural implications of this surface activity remain a matter of debate. Here, we examine the nature of anion–water interactions at the air/water interface using a combination of molecular dynamics simulations and quantum-mechanical energy decomposition analysis based on symmetry-adapted perturbation theory. Results are presented for a set of monovalent anions, including Cl−, Br−, I−, CN−, OCN−, SCN−, NO2−, NO3−, and ClOn− (n=1,2,3,4), several of which are archetypal examples of surface-active species. In all cases, we find that average anion–water interaction energies are systematically larger in bulk water although the difference (with respect to the same quantity computed in the interfacial environment) is well within the magnitude of the instantaneous fluctuations. Specifically for the surface-active species Br−(aq), I−(aq), ClO4−(aq), and SCN−(aq), and also for ClO−(aq), the charge-transfer (CT) energy is found to be larger at the interface than it is in bulk water, by an amount that is greater than the standard deviation of the fluctuations. The Cl−(aq) ion has a slightly larger CT energy at the interface, but NO3−(aq) does not; these two species are borderline cases where consensus is lacking regarding their surface activity. However, CT stabilization amounts to <20% of the total induction energy for each of the ions considered here, and CT-free polarization energies are systematically larger in bulk water in all cases. As such, the role of these effects in the surface activity of soft anions remains unclear. This analysis complements our recent work suggesting that the short-range solvation structure around these ions is scarcely different at the air/water interface from what it is in bulk water. Together, these observations suggest that changes in first-shell hydration structure around soft anions cannot explain observed surface activities.

Surface Activity−Compressibility Relationship of Proteins at the Air−Water Interface

Langmuir ◽  
1999 ◽  
Vol 15 (4) ◽  
pp. 1392-1399 ◽  
Author(s):  
Lev Razumovsky ◽  
Srinivasan Damodaran
Keyword(s):  
Surface Activity ◽  
Water Interface ◽  
Air Water Interface ◽  
Relationship Of
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