Regular microscopic patterns produced by simple reaction–diffusion systems
文献信息
Simple inorganic reactions, coupled with diffusion, are able to produce regular patterns of characteristic length scales of 10 µm. Solutions of CuCl2 or AgNO3 are homogenised in poly(vinyl)alcohol gel, and NaOH is allowed to diffuse into the gel. Reaction of the NaOH solution with the electrolyte present in the gel forms precipitates, which can show several types of primary (macroscopic) patterns, including spirals and target-like patterns. Depending on the velocity of the reaction front, the colloidal precipitate developed in this chemical reaction can yield a microscopic structure consisting of ordered sheets of particles. Conditions of formation and characterisation of the secondary (microscopic) patterns are presented. Emergence and disappearance of defects in these structures are also investigated. Possible theoretical explanation and technological applications of the microscopic patterns are discussed.
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Physical Chemistry Chemical Physics

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.














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