Publication date: 1 October 2017
Source:Journal of Crystal Growth, Volume 475
Author(s): Omar Teschke, David Mendez Soares
A mother crystal formed from a transient molecular structure of (d +l ) aspartic acid in solution is reported. Hexagonal structures with a lattice constant of 1.04d -aspartic and l -aspartic, respectively, and transitory (d +l ) aspartic acid specie. Atomic force microscopy images of the crystalline deposits reveal domains of the transitory (d +l ) aspartic acid crystal forming the substrate deposit on silicon wafers, and on top of this hexagonal lattice only l -aspartic acid is observed to conform and crystallize. A preferential crystallization mechanism is then observed for (d +l ) aspartic acid crystals that seed only l -aspartic deposits by the geometrical matching of their multiple hexagonal lattice structures with periodicities of 1.04
Source:Journal of Crystal Growth, Volume 475
Author(s): Omar Teschke, David Mendez Soares