35 research outputs found
The process of irreversible nucleation in multilayer growth. I. Failure of the mean-field approach
Full text linkThe formation of stable dimers on top of terraces during epitaxial growth is
investigated in detail. In this paper we focus on mean-field theory, the
standard approach to study nucleation. Such theory is shown to be unsuitable
for the present problem, because it is equivalent to considering adatoms as
independent diffusing particles. This leads to an overestimate of the correct
nucleation rate by a factor N, which has a direct physical meaning: in average,
a visited lattice site is visited N times by a diffusing adatom. The dependence
of N on the size of the terrace and on the strength of step-edge barriers is
derived from well known results for random walks. The spatial distribution of
nucleation events is shown to be different from the mean-field prediction, for
the same physical reason. In the following paper we develop an exact treatment
of the problem.Comment: 19 pages, 3 figures. To appear in Phys. Rev.
Beïnvloeding van de rijvaardigheid bij langdurig gebruik van ICADTS-categorie III geneesmiddelen
Get PDF
Non-Coordinated Synthesis of Glucose-Dehydrogenase and Its Prosthetic Group PQQ in Acinetobacter and Pseudomonas Species
No full textEffects of growth rate and oxygen tension on glucose dehydrogenase activity in Acinetobacter calcoaceticus LMD 79.41
No full textSelection of Glucose-Assimilating Variants of Acinetobacter-Calcoaceticus Lmd-7941 in Chemostat Culture
No full textEnergization of Solute Transport by Pqq-Dependent Glucose-Dehydrogenase in Membrane-Vesicles of Acinetobacter Species
No full textExperimental and Theoretical Discrepancies in Growth Yields of Acinetobacter-Calcoaceticus - a Correction of Published Data
No full textBiochemical Limits to Microbial-Growth Yields - an Analysis of Mixed Substrate Utilization
No full textOxidation of NADH and NADPH by Mitochondria from the Yeast Candida utilis
No full textApplied Science
