Designing patchy particles for optimum interfacial activity

文献情報

出版日 2014-02-11

DOI 10.1039/C3CP55512G

インパクトファクター 3.676

著者

Hossein Rezvantalab

原文を見る

要旨

We study the adsorption of spherical patchy particles to a flat oil–water interface for their potential applications as interface stabilizers. Chemical heterogeneity in form of single and double patches of different sizes is introduced on the surface of a homogeneous particle to induce an amphiphilic character. For a single well-defined patch, we have developed theoretical criteria for designing particles with the maximum degree of surface activity based on any given wettability conditions. We also evaluate the interfacial behavior of spherical particles with two symmetric patches. Depending on the amphiphilicity and size of the patches, our numerical calculations indicate that such particles at equilibrium can orient so their patches are either parallel or normal to the interface. In case of normal-patch orientation, the interface deforms due to heterogeneity along the contact line, leading to quadrupolar capillary interactions between neighboring particles. We demonstrate that the double-patch design can enhance the surface activity for contact angles close to 90°, while a single-patch pattern is preferred in case of highly amphiphilic particles.

掲載誌

Physical Chemistry Chemical Physics

CiteScore: 5.5

自己引用率: 10.3%

年間論文数: 3036

Physical Chemistry Chemical Physics (PCCP) is an international journal co-owned by 19 physical chemistry and physics societies from around the world. This journal publishes original, cutting-edge research in physical chemistry, chemical physics and biophysical chemistry. To be suitable for publication in PCCP, articles must include significant innovation and/or insight into physical chemistry; this is the most important criterion that reviewers and Editors will judge against when evaluating submissions. The journal has a broad scope and welcomes contributions spanning experiment, theory, computation and data science. Topical coverage includes spectroscopy, dynamics, kinetics, statistical mechanics, thermodynamics, electrochemistry, catalysis, surface science, quantum mechanics, quantum computing and machine learning. Interdisciplinary research areas such as polymers and soft matter, materials, nanoscience, energy, surfaces/interfaces, and biophysical chemistry are welcomed if they demonstrate significant innovation and/or insight into physical chemistry. Joined experimental/theoretical studies are particularly appreciated when complementary and based on up-to-date approaches.