Non-classical crystal growth on a hydrophobic substrate: learning from bivalve nacre

CrystEngComm ◽  
2020 ◽  
Vol 22 (18) ◽  
pp. 3100-3105
Author(s):  
Xin Feng ◽  
Ruohe Gao ◽  
Rize Wang ◽  
Gangsheng Zhang
Keyword(s):  
Crystal Growth ◽  
Hydrophobic Substrate ◽  
Classical Crystal

The hydrophobic substrate has an effect on the non-classical crystallization of nacreous aragonite crystals.

(NH4)3FeF6 Mesocrystal Grown by Electric Field-Assisted in-situ Dissolution and Reaction of Anodic Iron Oxides

2022 ◽  
Author(s):  
Hui Li ◽  
Zixue Su
Keyword(s):  
Crystal Growth ◽  
Electric Field ◽  
Iron Oxides ◽  
Growth Process ◽  
Electrical Polarization ◽  
Crystal Growth Process ◽  
Classical Crystal

(NH4)3FeF6 mesocrystalline octahedrons are formed by in-situ dissolution and reaction of anodic iron oxides, followed by a non-classical crystal growth process involving electrical polarization and subsequent alignment of primary (NH4)3FeF6...

scholarly journals Reversed Crystal Growth

Crystals ◽  
2018 ◽  
Vol 9 (1) ◽  
pp. 7 ◽  
Author(s):  
Wuzong Zhou
Keyword(s):  
Crystal Growth ◽  
Single Crystal ◽  
Single Crystals ◽  
Shell Structures ◽  
Core Shell ◽  
The Core ◽  
Single Nucleus ◽  
Amorphous Particles ◽  
Precursor Molecules ◽  
Classical Crystal

In the last decade, a reversed growth route has been found in many crystal growth processes. In these systems, a single crystal does not develop from a single nucleus. The precursor molecules/ions or nanocrystallites aggregate into some large amorphous or polycrystalline particles. Multiple-nucleation on the surface of the amorphous particles or surface re-crystallization of the polycrystalline particles then takes place, forming a single crystal shell with a regular morphology. Finally, the crystallization extends from the surface to the core to form single crystals. This non-classical crystal growth route often results in some special morphologies, such as core-shell structures, hollow single crystals, sandwich structures, etc. This article gives a brief review of the research into reversed crystal growth and demonstrates that investigation of detailed mechanisms of crystal growth enables us to better understand the formation of many novel morphologies of the crystals. Some unsolved problems are also discussed.

Rethinking Classical Crystal Growth Models through Molecular Scale Insights: Consequences of Kink-Limited Kinetics

2009 ◽  
Vol 9 (12) ◽  
pp. 5135-5144 ◽  
Author(s):  
J. J. De Yoreo ◽  
L. A. Zepeda-Ruiz ◽  
R. W. Friddle ◽  
S. R. Qiu ◽  
L. E Wasylenki ◽  
...  
Keyword(s):  
Crystal Growth ◽  
Growth Models ◽  
Molecular Scale ◽  
Classical Crystal

Oriented attachment of particles: 100 years of investigations of non-classical crystal growth

2014 ◽  
Vol 83 (12) ◽  
pp. 1204-1222 ◽  
Author(s):  
V K Ivanov ◽  
P P Fedorov ◽  
A Ye Baranchikov ◽  
V V Osiko
Keyword(s):  
Crystal Growth ◽  
Oriented Attachment ◽  
Classical Crystal

Wide-area multilayered self-assembly of fluorapatite nanorods vertically oriented on a substrate as a non-classical crystal growth

Nanoscale ◽  
2021 ◽  
Author(s):  
Yuki Hagiwara ◽  
Yuya Oaki ◽  
Hiroaki Imai
Keyword(s):  
Crystal Growth ◽  
Self Assembly ◽  
Functional Materials ◽  
Oriented Attachment ◽  
Wide Area ◽  
Fundamental Process ◽  
Classical Crystal

Oriented attachment of homogeneously shaped nanoblocks, such as nanocubes and nanorods, is attracting attention as a fundamental process of non-classical crystal growth to produce specific ordered architectures of functional materials....

scholarly journals A Mechanistic Understanding of Non-Classical Crystal Growth in Hydrothermally Synthesized Sodium Yttrium Fluoride Nanowires

2020 ◽  
Author(s):  
Alex Bard ◽  
Xuezhe Zhou ◽  
Xiaojing Xia ◽  
Guomin Zhu ◽  
Matthew Lim ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Crystal Growth ◽  
Materials Science ◽  
Atom Probe ◽  
Oriented Attachment ◽  
Yttrium Fluoride ◽  
X Ray ◽  
Transmission Electron ◽  
Classical Crystal

Sodium yttrium fluoride (NaYF<sub>4</sub>) is an upconverting material with many potential uses in chemistry, materials science, and biology that can be synthesized hydrothermally in both cubic (α) and hexagonal (β) crystallographic polymorphs. Understanding the mechanisms underlying the phase conversion between the cubic and hexagonal polymorphs is of great interest to help inform future efforts to synthesize atomically-precise quantum materials with well-defined sizes and morphologies. In this work, we use a combination of analytical transmission electron microscopy (TEM), scanning transmission electron microscopy (STEM), powder X-ray diffraction (XRD), in situ liquid cell TEM, atom probe tomography (APT), and extended x-ray absorption fine structure (EXAFS) measurements to show evidence suggesting that the hexagonal NaYF<sub>4</sub> nanowires form through a non-classical crystal growth mechanism involving the formation and subsequent oriented attachment of mesocrystals consisting of cubic (α) plase units. EXAFS spectroscopy also suggests that substitutional Yb<sup>3+</sup> point defects within NaYF<sub>4</sub> are distributed evenly throughout the crystal lattice without clustering, and also that they may exhibit selective substitution into one of the two possible trivalent yttrium sites in the unit cell for hydrothermally synthesized NaYF<sub>4</sub>.

scholarly journals Connection of crystal faceting with the mechanism of its formation

2019 ◽  
Vol 488 (3) ◽  
pp. 253-255
Author(s):  
P. P. Fedorov ◽  
V. V. Osiko
Keyword(s):  
Crystal Growth ◽  
Low Temperature ◽  
Growth Mechanism ◽  
Crystal Growth Mechanism ◽  
Classical Crystal

The observed formation of nano- and microcrystals devoid of faceting in low-temperature processes of their formation can be associated with the implementation of a non-classical crystal growth mechanism by aggregation and oriented splicing of particles. The observation is illustrated on CaF2 examples.

scholarly journals A Mechanistic Understanding of Non-Classical Crystal Growth in Hydrothermally Synthesized Sodium Yttrium Fluoride Nanowires

2020 ◽  
Author(s):  
Alex Bard ◽  
Xuezhe Zhou ◽  
Xiaojing Xia ◽  
Guomin Zhu ◽  
Matthew Lim ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Crystal Growth ◽  
Materials Science ◽  
Atom Probe ◽  
Oriented Attachment ◽  
Yttrium Fluoride ◽  
X Ray ◽  
Transmission Electron ◽  
Classical Crystal

Sodium yttrium fluoride (NaYF<sub>4</sub>) is an upconverting material with many potential uses in chemistry, materials science, and biology that can be synthesized hydrothermally in both cubic (α) and hexagonal (β) crystallographic polymorphs. Understanding the mechanisms underlying the phase conversion between the cubic and hexagonal polymorphs is of great interest to help inform future efforts to synthesize atomically-precise quantum materials with well-defined sizes and morphologies. In this work, we use a combination of analytical transmission electron microscopy (TEM), scanning transmission electron microscopy (STEM), powder X-ray diffraction (XRD), in situ liquid cell TEM, atom probe tomography (APT), and extended x-ray absorption fine structure (EXAFS) measurements to show evidence suggesting that the hexagonal NaYF<sub>4</sub> nanowires form through a non-classical crystal growth mechanism involving the formation and subsequent oriented attachment of mesocrystals consisting of cubic (α) plase units. EXAFS spectroscopy also suggests that substitutional Yb<sup>3+</sup> point defects within NaYF<sub>4</sub> are distributed evenly throughout the crystal lattice without clustering, and also that they may exhibit selective substitution into one of the two possible trivalent yttrium sites in the unit cell for hydrothermally synthesized NaYF<sub>4</sub>.

Sign in / Sign up

Export Citation Format

Share Document