Chirality-controlled crystallization via screw dislocations

Sung, Baeckkyoung; Cotte, Alexis de la; Grelet, Éric

doi:10.1038/s41467-018-03745-4

Cited by 36 publications

(33 citation statements)

References 45 publications

(53 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…7b top). These features are consistent with spiral growth around a screw dislocation [36][37][38][39] and are in excellent agreement with the microCT measurements (Fig. 3).…”

Section: Development Of Morphology Complexitysupporting

confidence: 89%

Emergence of chirality and structural complexity in single crystals at the molecular and morphological levels

et al. 2020

View full text Add to dashboard Cite

Naturally occurring single crystals having a multidomain morphology are a counterintuitive phenonomon: the macroscopic appearance is expected to follow the symmetry of the unit cell. Growing such crystals in the lab is a great challenge, especially from organic molecules. We achieve here uniform metallo-organic crystals that exhibit single crystallinity with apparently distinct domains and chirality. The chirality is present at both the molecular and macroscopic levels, although only achiral elements are used. "Yo-yo"-like structures having opposite helical handedness evolve from initially formed seemingly achiral cylinders. This non-polyhedral morphology coexists with a continuous coordination network forming homochiral channels. This work sheds light on the enigmatic aspects of fascinating crystallization processes occurring in biological mineralization. Our findings open up opportunities to generate new porous and hierarchical chiral materials.

show abstract

“…7b top). These features are consistent with spiral growth around a screw dislocation [36][37][38][39] and are in excellent agreement with the microCT measurements (Fig. 3).…”

Section: Development Of Morphology Complexitysupporting

confidence: 89%

Emergence of chirality and structural complexity in single crystals at the molecular and morphological levels

et al. 2020

View full text Add to dashboard Cite

show abstract

“…We rationalize this observation through an energy balance (Note S5, Supporting Information) between the dislocation strain energy and the energy required for creating the hollow core. A similar phenomenon is reported in other dislocation‐prone materials . Here, the open‐core dislocation of MgZn 2 is subsequently filled with the other eutectic phase (Zn), forming the micropipes (white arrow in Figure S2, Supporting Information).…”

Section: Resultssupporting

confidence: 77%

Multi‐Step Crystallization of Self‐Organized Spiral Eutectics

Moniri

Bale

Volkenandt

et al. 2020

Small

View full text Add to dashboard Cite

A method for the solidification of metallic alloys involving spiral self‐organization is presented as a new strategy for producing large‐area chiral patterns with emergent structural and optical properties, with attention to the underlying mechanism and dynamics. This study reports the discovery of a new growth mode for metastable, two‐phase spiral patterns from a liquid metal. Crystallization proceeds via a non‐classical, two‐step pathway consisting of the initial formation of a polytetrahedral seed crystal, followed by ordering of two solid phases that nucleate heterogeneously on the seed and grow in a strongly coupled fashion. Crystallographic defects within the seed provide a template for spiral self‐organization. These observations demonstrate the ubiquity of defect‐mediated growth in multi‐phase materials and establish a pathway toward bottom‐up synthesis of chiral materials with an inter‐phase spacing comparable to the wavelength of infrared light. Given that liquids often possess polytetrahedral short‐range order, our results are applicable to many systems undergoing multi‐step crystallization.

show abstract

“…Screw dislocation is essential for chirality in various inorganic nanocrystals 29,30 . Therefore, we chose ½T; C as a parameter set to explore the optimal experimental conditions, which has significant effects on screwdislocation-driven anisotropic crystal growth 31,32 . The sampling points (selected within 250 loops) during the search and optimization processes are shown in Fig.…”

Section: Resultsmentioning

confidence: 99%

Autonomous discovery of optically active chiral inorganic perovskite nanocrystals through an intelligent cloud lab

Liu

et al. 2020

Nat Commun

116

View full text Add to dashboard Cite

We constructed an intelligent cloud lab that integrates lab automation with cloud servers and artificial intelligence (AI) to detect chirality in perovskites. Driven by the materials acceleration operating system in cloud (MAOSIC) platform, on-demand experimental design by remote users was enabled in this cloud lab. By employing artificial intelligence of things (AIoT) technology, synthesis, characterization, and parameter optimization can be autonomously achieved. Through the remote collaboration of researchers, optically active inorganic perovskite nanocrystals (IPNCs) were first synthesized with temperature-dependent circular dichroism (CD) and inversion control. The inter-structure (structural patterns) and intrastructure (screw dislocations) dual-pattern-induced mechanisms detected by MAOSIC were comprehensively investigated, and offline theoretical analysis revealed the thermodynamic mechanism inside the materials. This self-driving cloud lab enables efficient and reliable collaborations across the world, reduces the setup costs of in-house facilities, combines offline theoretic analysis, and is practical for accelerating the speed of material discovery.

show abstract

Chirality-controlled crystallization via screw dislocations

Cited by 36 publications

References 45 publications

Emergence of chirality and structural complexity in single crystals at the molecular and morphological levels

Emergence of chirality and structural complexity in single crystals at the molecular and morphological levels

Multi‐Step Crystallization of Self‐Organized Spiral Eutectics

Autonomous discovery of optically active chiral inorganic perovskite nanocrystals through an intelligent cloud lab

Contact Info

Product

Resources

About