Abstract
KDP single crystals were grown in aqueous solution by using “point seeds” with a defined crystallographic direction of 59° to the Z axis. When hillock slopes on the (100) face of KDP crystals were measured within the supersaturation (σ) range of 0 < σ ≤ 0.06, the slope of hillocks with hollow cores depended nonlinearly on supersaturation. Below σ = 0.02, the hillock slope depended on supersaturation, but when σ was ≥ 0.02, the hillock slope increased more gradually and was less dependent on supersaturation. Hollow funnel-shaped growth dislocation on the (100) face of KDP crystals was observed at σ = 0.04, characterized by large holes with micro-steps and step bunching inside, the formation of which were analyzed. The result verified that the reversed growth appears to occur within hollow channels found on growth hillocks.
Highlights
KDP single crystals were grown in aqueous solution by using ‘‘point seeds’’ with a defined crystallographic direction of 596 to the Z axis
We found that the slope of hillocks with hollow cores increased nonlinearly with supersaturation values # 0.02, but for s $ 0.02, hillock slopes increased more gradually and leveled off
The hillocks were oriented along the four step directions on the (100) face and the rounded sections at the top of hillock, apparent in ex situ atomic force microscopy (AFM) morphology results, resulted from post-growth annealing[9]
Summary
KDP single crystals were grown in aqueous solution by using ‘‘point seeds’’ with a defined crystallographic direction of 596 to the Z axis. When hillock slopes on the (100) face of KDP crystals were measured within the supersaturation (s) range of 0 , s # 0.06, the slope of hillocks with hollow cores depended nonlinearly on supersaturation. Using AFM, they observed growth dislocation sources with various Burgers vectors on the (100) face of KDP crystals They did not observe growth hillocks with hollow cores on the (100) face. De Yoreo et al.[7] observed hillocks with hollow cores on the (101) face of KDP crystals in the supersaturation range of 0.03 # s # 0.31, where hillock slope depended nonlinearly on supersaturation. Mathematical relationships were developed to predict the correlation between hillock slope and supersaturation This model agrees well with our observations on the crystal growth on the (100) face of KDP
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
