Dendritic growth in viscous solutions containing organic molecules

Kubínek, Roman; Hozman, Jiřı́; Vařenka, Jiřı́

doi:10.1016/s0022-0248(98)00491-6

Cited by 9 publications

(4 citation statements)

References 9 publications

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“…In general, NaCl exhibits cubic and rectangular parallelepiped morphologies that originate from the cubic lattice of its unit cell. However, dendritic patterns projecting branches were observed with the drying of aqueous solutions that contained NaCl and artificial polymers, gelatin, , or other proteins. − The influence of physical factors on dendritic growth in the polymer matrixes was reported in previous works. Unfortunately, detailed conditions for the morphological variation and proper crystallographic orientations of NaCl dendrites have not been clarified sufficiently.…”

Section: Introductionmentioning

confidence: 79%

Dendritic Growth of NaCl Crystals in a Gel Matrix: Variation of Branching and Control of Bending

Goto

Oaki

Imai

2016

Crystal Growth & Design

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A variety of 2D dendritic morphologies, such as orthogonal lattices, oblique lattices, curved weaves, and randomly branching morphologies, of a simple cubic crystal, NaCl, were selectively produced in a thin gel matrix by the tuning of branching growth modes with the variation of NaCl and gelatin concentrations. We characterized the crystal fabric of these specific patterns consisting of NaCl blocks. It is notable that particular curved branches were induced by gradual changes in the growth direction in asymmetric concentration fields. Straight and bending growth in the particular dendrites can be switched by changing the growth velocity in the gel medium.

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Section: Introductionmentioning

confidence: 79%

Dendritic Growth of NaCl Crystals in a Gel Matrix: Variation of Branching and Control of Bending

Goto

Oaki

Imai

2016

Crystal Growth & Design

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“…Experiments on dendritic growth have hitherto relied on two archetypal scenarios: (i) dentritic solidification of a pure substance from its supercooled melt, where pattern formation is driven by supercooling and is controlled by diffusion of the latent heat that is generated away from the interface in the course of the transformation; this usually leads to dendritic patterns with branching instability; and (ii) the well-known Hele-Shaw cell, in which two immiscible liquids are constrained to move between narrowly separated plates such that viscous fingering patterns arise as high-viscosity fluid is displaced by low-viscosity fluid under pressure; such patterns usually show tip splitting instability. Newer experiments have involved organic molecules, Langmuir monolayers, and other materials: , the parameters of importance in such work have been tip radius and velocity. In our experiments, we have formed branched dendritic structures in liquids of different types on time scales that are 2 orders of magnitude faster than hitherto encountered.…”

Section: Introductionmentioning

confidence: 99%

Laser-Driven Accelerated Growth of Dendritic Patterns in Liquids

Basu

Kolwankar²,

Dharmadhikari

et al. 2012

J. Phys. Chem. C

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We report a scheme for very significantly accelerated growth of dendritic patterns in organic, inorganic, polymeric, and biological liquids, using laser power as low as a few hundred microwatts in the presence of an efficient absorber such as carbon nanotubes (CNTs). The CNTs act as a heat source that drives dendritic growth; their anisotropy ensures a rich diversity of branched patterns. We have studied the time evolution of the accelerated growth patterns; growth patterns are seen on millisecond time scales. We rationalize such unprecedented speed of dendritic growth using a diffusion equation for the temperature field with an additional source term. The predictions of the well-established microscopic solvability theory (MST) are seen to hold on time scales in excess of 100 ms even with the introduction of an additional source term to account for our laser beam. On the other hand, on time scales shorter than 100 ms, MST is seen to break down. Our method opens new vistas for studies on the dynamics of dendritic patterns and crystal growth.

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“…Even now there is no complete understanding of various patterns arising in systems that are out-of-equilibrium, specifically the formation of branched structures, viscous fingering and dendritic solidification. In recent years dendritic growth has also been observed in organic molecules [6] and in Langmuir monolayers [7].…”

Section: Introductionmentioning

confidence: 95%

Effect of heat source on the growth of dendritic drying patterns

Kolwankar¹,

Prakash

Radhakrishnan

et al. 2015

Pramana - J Phys

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Shining a tightly-focused but low-powered laser beam on an absorber dispersed in a biological fluid gives rise to spectacular growth of dendritic patterns. These result from localized drying of the fluid because of efficient absorption and conduction of optical energy by the absorber. We have carried out experiments in several biologically relevant fluids and have analyzed patterns generated by different types of absorbers. We observe that the growth velocity of branches in the dendritic patterns can decrease below the value expected for natural drying

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Dendritic growth in viscous solutions containing organic molecules

Cited by 9 publications

References 9 publications

Dendritic Growth of NaCl Crystals in a Gel Matrix: Variation of Branching and Control of Bending

Dendritic Growth of NaCl Crystals in a Gel Matrix: Variation of Branching and Control of Bending

Laser-Driven Accelerated Growth of Dendritic Patterns in Liquids

Effect of heat source on the growth of dendritic drying patterns

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