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Collective Electronic Polarization Drives Charge Asymmetry at Oil-Water Interfaces
Gabriele Amante, Klaudia Mrazikova, Gabriele Centi, Sylvie Roke, Ali Hassanali, Giuseppe Cassone
https://arxiv.org/abs/2603.24142 https://arxiv.org/pdf/2603.24142 https://arxiv.org/html/2603.24142
arXiv:2603.24142v1 Announce Type: new
Abstract: Why kinetically stable oil droplets in water spontaneously acquire a negative charge remains one of the most vigorously debated questions in interfacial science. Here, we combine neural-network based deep potential molecular dynamics with a data-driven and information theory approach to probe the real-space electron density at an extended decane-water interface. While decane-water clusters show nearly symmetric forward and backward charge transfer (CT) and thus negligible net CT, the extended interface displays a systematic electronic asymmetry, yielding a net CT from water to the hydrocarbon phase producing an average surface charge density of $\sim0.006~e^{-}\,\mathrm{nm}^{-2}$ on the oil phase. This imbalance is accompanied by much larger intra-phase self-polarization, particularly within the hydrocarbon phase, demonstrating that collective many-body polarization dominates the interfacial electronic response. Structural analysis reveals an asymmetry between forward C--H$\cdots$O and backward O--H$\cdots$C motifs, providing a microscopic origin for a net CT from one phase to the other. Curiously, both the water O--H and decane C--H covalent bonds incur subtle contractions which originate from a response to the charge-separation layers at the interface. These features are fully consistent with the weak improper hydrogen-bonds forming at the oil-water interface that results in blue-shifts of the C-H modes.
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Replaced article(s) found for cs.CL. https://arxiv.org/list/cs.CL/new
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In some Latin American and Caribbean countries, such as Suriname, it is up to 12 times cheaper to drive an electric vehicle than a petrol car (when looking purely at fuel costs)
https://www.agora-verkehrswende.org/publications/fuel-cost-map…

I often agree with Robert Reich, but not this time. Trump is a wholly US creation; a product of a national glorification of greed, selfishness, and ego all disguised as some sort of conquering hero.
So, USians: You made him, you elected him, and he is your responsibility. His actions absolutely reflect on you, and he is your responsibility to deal with.
Get rid of him. Now. And then we can talk about being friends again.

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These ads are rubbish, the kind that would come …

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https://www.politico.com/news/2026/05/09/poll-americans-say-too-much-money-in-politics-00912455
http://www.memeorandum.com/260510/p3#a260510p3

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https://www.sfchronicle.com/opini…