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Roughening transition crystal shapes

Unfortunately, even for low molecular weight material it is difficult to obtain clear experimental evidence for a roughening transition [71]. This is mainly due to the fact that during growth the interface generally assumes a metastable shape and relaxation times are long and increase with crystal size. Therefore we certainly cannot expect a definitive answer for macromolecules. We shall therefore just make several comments which hopefully will be of use when reading the literature. [Pg.305]

The first indication for the existence of a roughening transition was obtained by Jackson and Miller who studied the crystal shape of chloroethane and ammonium chloride. Above 370 K and 430 K, respectively, they observed a drastic change in crystal morphology, which might be interpreted as roughening. Similar observations for adamantane have been reported by Pavlovska . ... [Pg.270]

Special attention has been paid to the profiles shapes, the asymptotic decay laws of the amplitude, and related scaling behavior. The roughening transition temperature of the relevant crystal surface plays a crucial role for these properties, for a given type of transport mechanism. [Pg.156]

Several surface-specific structural phase transitions are observed in ice. We will focus here on complementary aspects of the basic phenomena of interfacial melting, surface roughening, and molecular kinetics and their application to the equilibrium and growth structures of ice crystals. A central issue is how the interfacial structure at ice/vapor, ice/gaseous-atmosphere and ice/water interfaces influences the adsorption potential, the growth shapes and surface transport properties. The environmental relevance concerns die fact that ice dominates the crystal growth phenomena we observe... [Pg.39]


See other pages where Roughening transition crystal shapes is mentioned: [Pg.130]    [Pg.262]    [Pg.92]    [Pg.98]    [Pg.498]    [Pg.295]    [Pg.43]    [Pg.43]    [Pg.49]    [Pg.376]    [Pg.829]    [Pg.52]   
See also in sourсe #XX -- [ Pg.98 ]




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Roughening transition

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