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Morphological instabilities of polymer crystals
The European Physical Journal E, 2008We present experimental observations at comparatively low supercooling of morphology transitions from dendritic to faceted structures in polymer crystals growing in thin films of a poly-2-vinylpyridine-block-polyethyleneoxid copolymer. Our results are compared with theoretical concepts describing morphological instabilities of single crystals. Although
Grozev, Nikolay +2 more
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Screening Crystal Morphologies from Crystal Structure
Crystal Growth & Design, 2013Crystal morphology is a critical determinant of the physical properties of crystalline materials. Face-specific growth rates can be used to compute dynamic and steady-state morphologies of crystals growing in a specific environment. The synthesis of crystals with desired morphologies requires a framework to guide the selection of environmental ...
SINGH, MR +4 more
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Crystallization-Induced Properties from Morphology-Controlled Organic Crystals
Accounts of Chemical Research, 2014During the past two decades, many materials chemists have focused on the development of organic molecules that can serve as the basis of cost-effective and flexible electronic, optical, and energy conversion devices. Among the potential candidate molecules, metal-free or metal-containing conjugated organic molecules offer high-order electronic ...
Park, C, Park, JE, Choi, HC
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Quantification of crystal morphology
Journal of Crystal Growth, 1994Abstract Morphological measurement constitutes an important experimental subject in crystal growth and materials science, and is currently receiving renewed attention because of the rapid advances occurring in computer technology, coupled with the concomitant sharp reductions in the cost of digital image processing.
M.E. Glicksman +4 more
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Growth morphologies of crystal surfaces
Physical Review A, 1991A previously proposed Monte Carlo model (Xiao et al., 1988, 1990) is extended to three dimensions, and reevaporation after accommodation and growth on dislocation-induced steps are included. It is found again that, for a given set of growth parameters, the critical size beyond which a crystal cannot retain its macroscopically faceted shape scales ...
, Xiao, , Alexander, , Rosenberger
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Needle Crystal Morphology Explained
Chemical Engineering & Technology, 2003AbstractThe morphology of needle shaped crystals is, usually, ill‐predicted when using the common attachment energy approach. Here we explain the needle shape of triacylglycerol crystals on the basis of a two‐dimensional nucleation growth mechanism. For that the edge energies of 2D nuclei on the surfaces of the various crystal faces is determined and ...
H. Meekes +3 more
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2000
This chapter focuses on crystal morphology. The overall shape of a crystal—often called its habit, form, or morphology—is a vital parameter in determining the viability of both processes and products. It is usual to distinguish between ‘equilibrium’ and ‘growth’ morphologies. Morphology is determined by two factors: the symmetry of the internal crystal
Roger J. Davey, John Garside
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This chapter focuses on crystal morphology. The overall shape of a crystal—often called its habit, form, or morphology—is a vital parameter in determining the viability of both processes and products. It is usual to distinguish between ‘equilibrium’ and ‘growth’ morphologies. Morphology is determined by two factors: the symmetry of the internal crystal
Roger J. Davey, John Garside
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Morphology of modulated crystals
Physica Status Solidi (a), 1994Continuing three recent papers the basic principles of a theory to explain the occurrence of faces to be indexed with four integers (hklm) occurring on modulated crystals are explained. The theory is rooted in the higher than three-dimensional crystallography of Janner, Janssen, and de Wolff.
P. Bennema +3 more
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Calcium oxalate crystal morphology
Trends in Plant Science, 2002Plants invest considerable resources of carbon and calcium in crystal formation, indicating that it is an important basic process in growth and development. The diversity of crystal shapes, as well as their prevalence and spatial distribution, have led to several hypotheses regarding crystal function in plants.
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Morphology of Oligomer Crystals
Proceedings, annual meeting, Electron Microscopy Society of America, 1973Poly(ethylene terephthalate) (PET), contains approximately 1.5% oligomer (cyclic trimer). When films are heated the oligomers tend to migrate out and crystallize on the surface. The isolation and identification of oligomer has been reported; the crystal structure has been studied by x-ray and electron diffraction. Except for some optical work, however,
Y. T. Chen, E. A. Bartkus
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