TY - JOUR
T1 - Videomicroscopic Observation of Nonequilibrium Growth Patterns of Crystals
AU - Tsai, Chung‐Hsien ‐H
AU - Hsu, Tze‐Jeng ‐J
AU - Mou, Chung‐Yuan ‐Y
PY - 1990/4
Y1 - 1990/4
N2 - We have developed a video‐microscopic computer imaging system for observing meso‐scale nonequilibrium physicochemical structures. Chargcd‐coupled device (CCD) in optical detection, and computer‐enhancement of digitized image, have greatly improved the resolution, sensitivity, and dynamical range of this technique. We apply this system to the observation of various complex crystallization patterns from Suberic acid melts and Camphene condensation. These patterns are of the scale one to 100 micrometers. They are resulted from nonlinear dynamical instabilities of a growing crystal fronts. The following patterns are observed: dendrites, destabilization of flat surface, cellular solidification, tip‐splitting, and dense branches. A computer simulation based on diffusion‐limited aggregates (DLA) model is performed to show this instability. The DLA model with surface tension effect is able to result in fractal‐like, dendrite, and needle‐like growth pattern.
AB - We have developed a video‐microscopic computer imaging system for observing meso‐scale nonequilibrium physicochemical structures. Chargcd‐coupled device (CCD) in optical detection, and computer‐enhancement of digitized image, have greatly improved the resolution, sensitivity, and dynamical range of this technique. We apply this system to the observation of various complex crystallization patterns from Suberic acid melts and Camphene condensation. These patterns are of the scale one to 100 micrometers. They are resulted from nonlinear dynamical instabilities of a growing crystal fronts. The following patterns are observed: dendrites, destabilization of flat surface, cellular solidification, tip‐splitting, and dense branches. A computer simulation based on diffusion‐limited aggregates (DLA) model is performed to show this instability. The DLA model with surface tension effect is able to result in fractal‐like, dendrite, and needle‐like growth pattern.
KW - Crystal Growth
KW - Diffusion Limited Aggregates
KW - Nonequilibrium pattern
KW - Video‐microscopy
UR - http://www.scopus.com/inward/record.url?scp=84985161727&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84985161727&partnerID=8YFLogxK
U2 - 10.1002/jccs.199000022
DO - 10.1002/jccs.199000022
M3 - Article
AN - SCOPUS:84985161727
SN - 0009-4536
VL - 37
SP - 163
EP - 171
JO - Journal of the Chinese Chemical Society
JF - Journal of the Chinese Chemical Society
IS - 2
ER -