Impurities Assisted with Control of Polymorphs during Seeded Crystallization

2020 ◽  
Vol 53 (4) ◽  
pp. 160-166
Author(s):  
Kota Tanaka ◽  
Hiroshi Takiyama
Polymer ◽  
2022 ◽  
pp. 124556
Author(s):  
Ruru Wan ◽  
Xiaoli Sun ◽  
Zhongjie Ren ◽  
Haijun Wang ◽  
Huihui Li ◽  
...  

Author(s):  
Heng Pan ◽  
Costas Grigoropoulos

Seeded crystallization and solidification in nanoscale confinement volumes has become an important and complex topic in nanomanufacturing. Due to the complexity and limitations in observing nanoscale crystallization, computer simulation can provide valuable details for supporting and interpreting experimental observations. In this article, seeded crystallization from nano-confined liquid, as represented by the crystallization of a suspended gold nano-droplet seeded by a pre-existing gold nanocrystal seed, was investigated using molecular dynamics simulations in canonical (NVT) ensemble. We found that the crystallization temperature depends on nano-confinement volume, crystal orientation and seed size as explained by classical two-sphere model and Gibbs-Thomson effect.


1986 ◽  
Vol 74 ◽  
Author(s):  
El-Hang Lee ◽  
M. Abdul Awal

AbstractCharacteristics of beam-recrystallized Si-on-insulator (SOT) and Ge-on-insulator (GOI) material systems are compared for the first time to gain complementary understanding of the crystallization mechanism that would benefit both systems. In general, GOI has been found to behave quite differently from SOI. In SOI, Si yields sub-boundaries; in GOI, Ge generates twinned or faceted crystals. In GOI, too, sub-boundary-like features were observed, but only occasionally in the midst of twinned crystals. Also observed in GOI was the phenomenon of seeded crystallization breakdown, where defect-free crystals from the seed abruptly turn into defect-laced crystals at a certain distance from the seed. This phenomenon is highly characteristic in SOI, but has never been reported for GOI. These findings are compared and discussed in light of the traditional understanding of crystal growth.


2007 ◽  
Vol 90 (5) ◽  
pp. 1615-1618 ◽  
Author(s):  
Yi Zhang ◽  
Bin Li ◽  
Pinggen Rao ◽  
Ming Lü ◽  
Jianqing Wu

Polymer ◽  
2013 ◽  
Vol 54 (17) ◽  
pp. 4637-4644 ◽  
Author(s):  
Dario Cavallo ◽  
Lorenza Gardella ◽  
Giuseppe Portale ◽  
Alejandro J. Müller ◽  
Giovanni C. Alfonso

2015 ◽  
Vol 218 ◽  
pp. 24-32 ◽  
Author(s):  
Qiuying Wu ◽  
Isaac Nartey Oduro ◽  
Yong Huang ◽  
Yunming Fang

1976 ◽  
Vol 96 (1) ◽  
pp. 71-74 ◽  
Author(s):  
MASAHIRO INAGAKI ◽  
IEJI KUNIYOSHI ◽  
SABURO NABETA

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