کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5408011 1506528 2017 36 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Determination and classification of the effective potentials between nanoparticles and nanopores within bilayer-membranes versus their geometry and density. Experimental inspiration
ترجمه فارسی عنوان
تعیین و طبقه بندی پتانسیل موثر بین نانوذرات و نانوپروسها در غشاء دو لایه در مقابل هندسه و تراکم آنها. الهام تجربی
کلمات کلیدی
نانوذرات، غلافهای بیلایر، موثر بودن جفت پتانسیل، طبقه بندی، مانع انرژی، پدیده انعقاد،
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی تئوریک و عملی
چکیده انگلیسی
The purpose of this work is a quantitative determination of the effective interaction potential, upon distance, between inert nanoparticles or (parallel or crossed) nanopores which are inserted in a bilayer-membrane. The expected effective pair-potential is the sum of a repulsive part and an attractive one. The expression of this repulsive part that originates from the thermal fluctuations of the host bilayer-membrane, was put in evidence in some recent experiments using Synchrotron Small-angle X-ray scattering, and has a Gaussian form, with an amplitude and a range that depend essentially on the density of the nano-inclusions (nanoparticles or nanopores). The amplitude is simply the contact energy between the nano-inclusions, and the second represents the in-plan correlation length that measures the membrane fluctuations extent. The attractive part is the usual van der Waals attractive potential. First, we construct the expression of the effective pair-potentials. Second, we rigorously study their classification with respect to the relevant parameters of the problem, which are the geometric dimensions of the nano-inclusions (their radius, ratio aspect of the parallel nanopores, angle between crossed nanopores), their density and the Hamaker constant. In particular, we show the existence of a special value of the nano-inclusion density (critical coagulation density), at which a coagulation regime takes place. Below this critical density, the pair-potential presents an energy barrier that prevents the coagulation of the nano-inclusions, and above, such a potential is completely attractive. Finally, we emphasize that the achieved classification may serve to studying the structure and thermodynamics of these nano-inclusions, as a two-dimensional model fluid system.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Molecular Liquids - Volume 243, October 2017, Pages 591-599
نویسندگان
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