论文信息 - Formation of n-alcohol crystallites from solution

Formation of n-alcohol crystallites from solution

Kinetics of heterogeneous nucleation of n-alcohols (C20OH and C22OH) on vapor-deposited thin films of fatty acid is studied both experimentally and theoretically. A kinetic model describing the three-dimensional nucleation and subsequent growth on active centers is solved numerically. The basic characteristics of nucleation process, such as nucleation rate and the total number of nuclei on unit surface, are determined from the distribution function. Depletion of active centers on template film has been incorporated into our computation. The interfacial energy was chosen to get best coincidence between theoretical and experimental data of the total number of nuclei, which gives 0.0029 J m−2 for C20OH and 0.00285 J m−2 for C22OH, respectively.

[1] X. Liu. A new kinetic model for three-dimensional heterogeneous nucleation , 1999 .

[2] Yoshihisa Suzuki,et al. Effects of pressure on growth kinetics of tetragonal lysozyme crystals , 2000 .

[3] O. Söhnel. Electrolyte crystal-aqueous solution interfacial tensions from crystallization data , 1982 .

[4] Xiang‐Yang Liu,et al. Heterogeneous two-dimensional nucleation and growth kinetics , 1997 .

[5] M. Ward,et al. Selective Nucleation and Growth of an Organic Polymorph by Ledge-Directed Epitaxy on a Molecular Crystal Substrate , 1995 .

[6] W. Beckmann,et al. Calculations of the intermolecular potential and surface energies of stearic acid , 1984 .

[7] H. Kumomi,et al. ALTERNATIVE ORIGIN OF LOG-NORMAL SIZE DISTRIBUTIONS OF CRYSTALLITES IN CONTROLLED SOLID-PHASE CRYSTALLIZATION OF AMORPHOUS SI THIN FILMS , 1999 .

[8] J. Schmelzer,et al. Comments on nucleation theory , 1998 .

[9] M. Nesladek,et al. Transient nucleation on inhomogeneous foreign substrate , 1998 .

[10] J. Yano,et al. Kinetics of Heterogeneous Nucleation of n-Alcohol Crystals from Solution Assisted by Template Thin Films of Monoacylglycerols and Fatty Acids , 2000 .

[11] T. Nakada,et al. Control of polymorphic occurrence of behenic acid thin films in physical vapor deposition , 1999 .

[12] D. Kashchiev,et al. Recent investigations on nucleation and crystal growth processes , 1981 .