Supersaturation is a factor of great industrial importance to the crystal growth by affecting the final aspect ratio and morphology of organic compounds. In this work, the qualitative relationship between aspect ratio and supersaturation of benzoic acid (BA) was elucidated for the first time by experimental and simulative study. Experimentally, it was found that the crystal shape of BA changes from needle-like crystal to rectangular sheet and then to hexagonal particles with the increasing supersaturation ranging from 1.029 to 2.941. The increment of supersaturation decreases the average aspect ratio of crystallized particles from ∼20.5 to ∼1.3. Furthermore, a higher supersaturation (σ=1.618) leads to more isotropic hexagonal crystals due to less face discrimination at high crystallization rates. Additionally, we predicted the supersaturation-dependent crystal habit by the modified attachment energy (MAE) model, which yield good agreement with the experimental observed crystals at medium and high supersaturations.

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final aspect ratio face discrimination crystallized particles morphology of organic compounds supersaturation of benzoic acid ba supersaturation hsp sp025hsp sp0251618 supersaturationdependent crystal habit isotropic hexagonal crystals crystallization rates rectangular sheet attachment energy mae model

Fei Wu, Chunyu Xue, Hong Zhao,Zuozhong Liang, Jian-Feng Chen, Min Zhang,.Supersaturation controlled morphology and aspect ratio changes of benzoic acid crystals. 99 (0),296-303.

Fei Wu, et al."Supersaturation controlled morphology and aspect ratio changes of benzoic acid crystals" 99

Fei Wu, Chunyu Xue, Hong Zhao,Zuozhong Liang, Jian-Feng Chen, Min Zhang,"Supersaturation controlled morphology and aspect ratio changes of benzoic acid crystals"