Supersaturated aqueous solutions of glycine exposed to intense pulses of plane-polarized laser light at 1.06 μm unexpectedly crystallized into the polar γ-polymorph of glycine. Control solutions not exposed to the laser always produced crystals of α-glycine, the expected and most stable form. This result suggests a new approach to polymorph control and possibly a means to produce new polymorphs.

Nucleation induction times of the protein lysozyme in aqueous solution were studied using electrodynamic levitation of single solution droplets. This technique allows the study of homogeneous nucleation by the elimination of dust, dirt, and container walls. A new experimental procedure was employed, which allowed control of the relative humidity around the supersaturated droplet and thus allowed the measurement of nucleation induction time at a given supersaturation. This measurement was performed 510 times at essentially identical conditions to obtain sufficient data to examine the statistics of nucleation induction time. An analysis of the data using the classic approach of Turnbull and a newly proposed two-step treatment is presented.

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Methylammonium lead tribromide (CH3NH3PbBr3) single crystals has gained a growing attention in the past few years due to their use as model material to investigate relevant intrinsic perovskite properties, and for their potential applications for radiation detection. Their study has been facilitated by the ease and speed of fabrication of millimetric single crystals through a simple protocol of unseeded Inverse Temperature Crystallization (ITC). In this study, we show that such growing conditions suffer from both insufficient reproducibility regarding crystal quality and