Nanostructured diffusion-limited-aggregation crystal pattern formation in a reactive microemulsion system

Srivastava, Rohit; Srivastava, Priyanka

doi:10.1088/2043-6262/5/1/015018

Cited by 2 publications

(2 citation statements)

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“…involved in their generation. This is a matter of great importance because pattern-forming phenomena are ubiquitous in nature especially in geological and biological process [42]. However, no satisfactory explanation has still been provided for their development [43].…”

Section: Addition Of An Intermediate Layer Of Pure Gelmentioning

confidence: 99%

“…The correlation between crystallization conditions and the over-organization of the crystalline precipitate is important to clarify the mechanistic aspects involved in their generation. This is a matter of great importance because pattern-forming phenomena are ubiquitous in nature especially in geological and biological process [42]. However, no satisfactory explanation has still been provided for their development [43].…”

Section: Crystallization In Water-water Solvent Systemmentioning

confidence: 99%

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Phase Stability and Morphology of Gel Grown Crystals: The Case of CdCl2-bpp Polymeric System

2019

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A phenomenological study is carried out on a complex two-component diffusion-reacting system in gel, that is, the Cd-1,3-bis(4-pyridyl)propane (Cd-bpp) coordination polymer. The latter can exist in three solid forms, which exploit a 1:1 correspondence among the Cd/bpp ratio, the crystal structure and the crystal morphology (1/2: bipyramids; 2/3: needles; 1/3: plates). The aim was to clarify the role of key physicochemical variables (reactant concentrations, composition of the solvent and density of the transport medium) in determining the chemical nature and the morphology of the final crystallization products. The gel method was tested in a variety of different crystallization configurations, including single and double diffusion techniques. The density of the gel primarily affects the morphology of the synthesized crystals, with denser media favouring the needle-like 2/3 Cd-bpp species and diluted ones the 1/2 Cd-bpp bipyramidal one. However, higher densities of the gel are generally associated to strained crystals. The solvent composition is also important, as for example the 1/2 Cd-bpp bipyramids require at least a minimum amount of ethanol to appear. We demonstrated that in gel the strict “equality” stoichiometric criteria for metal-to-ligand ratios can be sometimes eluded, as non–equilibrium concentrations can be locally attained. In this respect, the crystallization geometry was proven to act as a key tool to influence the crystallization output, as it determines the direction and magnitude of the concentration gradients. Finally, the use of U tubes to perform one-pot screenings of a large part of the crystallization space is discussed.

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Section: Addition Of An Intermediate Layer Of Pure Gelmentioning

confidence: 99%

Section: Crystallization In Water-water Solvent Systemmentioning

confidence: 99%

Phase Stability and Morphology of Gel Grown Crystals: The Case of CdCl2-bpp Polymeric System

2019

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Observations of diffusion-limited aggregation-like patterns by atmospheric plasma jet

Chiu

Chu

2017

Physics of Plasmas

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We report on the observations of diffusion-limited aggregation-like patterns during the thin film removal process by an atmospheric plasma jet. The fractal patterns are found to have various structures like dense branching and tree-like patterns. The determination of surface morphology reveals that the footprints of discharge bursts are not as random as expected. We propose a diffusion-limited aggregation model with a few extra requirements by analogy with the experimental results, and thereby present the beauty of nature. We show that the model simulates not only the shapes of the patterns similar to the experimental observations, but also the growing sequences of fluctuating, oscillatory, and zigzag traces.

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Nanostructured diffusion-limited-aggregation crystal pattern formation in a reactive microemulsion system

Cited by 2 publications

References 43 publications

Phase Stability and Morphology of Gel Grown Crystals: The Case of CdCl2-bpp Polymeric System

Phase Stability and Morphology of Gel Grown Crystals: The Case of CdCl2-bpp Polymeric System

Observations of diffusion-limited aggregation-like patterns by atmospheric plasma jet

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