scholarly journals Author Response to Comment on: Conventional and Microwave Hydrothermal Synthesis and Application of Functional Materials: A Review

Materials ◽  
2019 ◽  
Vol 12 (21) ◽  
pp. 3640 ◽  
Author(s):  
Guijun Yang ◽  
Soo-Jin Park
Keyword(s):  
Hydrothermal Synthesis ◽  
Functional Materials ◽  
Nucleation And Growth ◽  
Crystal Nucleation ◽  
Author Response ◽  
Microwave Hydrothermal ◽  
Detailed Explanation ◽  
To Receive

We recently published an article “Conventional and Microwave Hydrothermal Synthesis and Application of Functional Materials: A Review” on Materials, and we are honored to receive a comment article from Jalouli et al. We will give a detailed explanation for the confusion of the mechanism of crystal nucleation and growth in the comment article.

Uniform Hematite Hexagonal Nanodisks with Dominant (001) Facets: Hydrothermal Synthesis and Catalytic Performance for the Decomposition of Ammonium Perchlorate

2014 ◽  
Vol 651-653 ◽  
pp. 161-164
Author(s):  
Shun Hong Shi ◽  
Gang Xu
Keyword(s):  
Catalytic Activity ◽  
Hydrothermal Synthesis ◽  
Ethylene Glycol ◽  
Ammonium Perchlorate ◽  
Hydrothermal System ◽  
Equilibrium Condition ◽  
Catalytic Performance ◽  
Nucleation And Growth ◽  
Crystal Nucleation ◽  
Hydrothermal Route

Uniform hematite (α-Fe2O3) hexagonal nanodisks with dominant (001) facets have been synthesized via hydrothermal route assisted with ethylene glycol (EG). XRD, SEM, TEM, HRTEM and SAED were employed to characterize the synthesized samples. The results show that the moderate addition of EG in the hydrothermal system creates an equilibrium condition for the crystal nucleation and growth, resulting in the uniform α-Fe2O3hexagonal nanodisks with dominant (001) facets. Due to the exposition of the special facets of (001) and (110), the α-Fe2O3nanodisks express superior catalytic activity for the decomposition of ammonium perchlorate (AP).

scholarly journals A comment on: “Conventional and Microwave Hydrothermal Synthesis and Application of Functional Materials: A Review”

Materials ◽  
2019 ◽  
Vol 12 (21) ◽  
pp. 3631 ◽  
Author(s):  
Behrouz Jalouli ◽  
Aref Abbasi ◽  
S. Mohammad Musavi Khoei
Keyword(s):  
Crystal Growth ◽  
Hydrothermal Synthesis ◽  
Hydrothermal Method ◽  
Growth Mechanism ◽  
Short Communication ◽  
Functional Materials ◽  
Microwave Hydrothermal ◽  
Crystal Growth Mechanism

In the recent paper published in Materials (Yang et al., 2019), there is a mistake in the explanation of crystal growth mechanism of the hydrothermal method. The error in this article is discussed in this short communication.

scholarly journals The Ambiguous Functions of the Precursors That Enable Nonclassical Modes of Olanzapine Nucleation and Growth

Crystals ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 738
Author(s):  
Monika Warzecha ◽  
Alastair J. Florence ◽  
Peter G. Vekilov
Keyword(s):  
Crystal Surface ◽  
Functional Materials ◽  
Crystal Form ◽  
Nucleation And Growth ◽  
Crystal Nucleation ◽  
Supersaturated Solution ◽  
Growth Media ◽  
Nonclassical Models ◽  
Organic Solutions ◽  
Design And Manufacture

One of the most consequential assumptions of the classical theories of crystal nucleation and growth is the Szilard postulate, which states that molecules from a supersaturated phase join a nucleus or a growing crystal individually. In the last 20 years, observations in complex biological, geological, and engineered environments have brought to light violations of the Szilard rule, whereby molecules assemble into ordered or disordered precursors that then host and promote nucleation or contribute to fast crystal growth. Nonclassical crystallization has risen to a default mode presumed to operate in the majority of the inspected crystallizing systems. In some cases, the existence of precursors in the growth media is admitted as proof for their role in nucleation and growth. With the example of olanzapine, a marketed drug for schizophrenia and bipolar disorder, we demonstrate that molecular assemblies in the solution selectively participate in crystal nucleation and growth. In aqueous and organic solutions, olanzapine assembles into both mesoscopic solute-rich clusters and dimers. The clusters facilitate nucleation of crystals and crystal form transformations. During growth, however, the clusters land on the crystal surface and transform into defects, but do not support step growth. The dimers are present at low concentrations in the supersaturated solution, yet the crystals grow by the association of dimers, and not of the majority monomers. The observations with olanzapine emphasize that detailed studies of the crystal and solution structures and the dynamics of molecular association may empower classical and nonclassical models that advance the understanding of natural crystallization, and support the design and manufacture of promising functional materials.

In situ microcalorimetric investigation on the formation of cadmium-organic framework based on 5-mercaptoisophthalic acid

2018 ◽  
Vol 11 (01) ◽  
pp. 1850002
Author(s):  
Huoshi Cen ◽  
Wenlong Liu ◽  
Zhaodong Nan
Keyword(s):  
Porous Metal ◽  
Functional Materials ◽  
Nucleation And Growth ◽  
Crystal Nucleation ◽  
Crystal Formation ◽  
Formation Processes ◽  
X Ray ◽  
Endothermic Process ◽  
Metal Organic

In situ microcalorimetry was first used to study the crystal formation processes of porous metal-organic frameworks (MOF), [((CH[Formula: see text]NH[Formula: see text]Cd(MIPA)][Formula: see text][Formula: see text], where H3MIPA is 5-Mercaptoisophthalic acid, G represents guest of DMA and H2O. An endothermic process occurred firstly, which is corresponding to the chemical reaction among the reactants. Exothermic processes followed the endothermal process are corresponding to crystal nucleation and growth. The experimental results demonstrate that a solid sample was first obtained at 150[Formula: see text]C for 24[Formula: see text]h. X-ray powder diffraction (XRD) peaks of the samples enhanced with the experimental time increasing from 24 to 60[Formula: see text]h (as 24, 35, 48 and 60[Formula: see text]h). The adsorption properties of the crystal obtained at 150[Formula: see text]C for 60[Formula: see text]h are more excellent than those reported and the same MOF synthesized at 150[Formula: see text]C for 72[Formula: see text]h. This study may give a method for investigation on MOFs formation mechanism and help to synthesize this kind of functional materials.

scholarly journals Molecular Dynamics Simulations of Crystal Nucleation near Interfaces in Incompatible Polymer Blends

Polymers ◽  
2021 ◽  
Vol 13 (3) ◽  
pp. 347
Author(s):  
Wenlin Zhang ◽  
Lingyi Zou
Keyword(s):  
Molecular Dynamics ◽  
Polymer Blends ◽  
Md Simulations ◽  
Nucleation And Growth ◽  
Crystal Nucleation ◽  
Crystalline Order ◽  
Mobile Species ◽  
Deep Supercooling ◽  
Crystallizable Polymer ◽  
Dynamics Simulations

We apply molecular dynamics (MD) simulations to investigate crystal nucleation in incompatible polymer blends under deep supercooling conditions. Simulations of isothermal nucleation are performed for phase-separated blends with different degrees of incompatibility. In weakly segregated blends, slow and incompatible chains in crystallizable polymer domains can significantly hinder the crystal nucleation and growth. When a crystallizable polymer is blended with a more mobile species in interfacial regions, enhanced molecular mobility leads to the fast growth of crystalline order. However, the incubation time remains the same as that in pure samples. By inducing anisotropic alignment near the interfaces of strongly segregated blends, phase separation also promotes crystalline order to grow near interfaces between different polymer domains.

Microwave-hydrothermal synthesis of CuO nanorods and their catalytic applications in sodium humate synthesis and RhB degradation

2014 ◽  
Vol 40 (3) ◽  
pp. 5103-5106 ◽  
Author(s):  
Longjiao Shi ◽  
Chao Yang ◽  
Xintai Su ◽  
Jide Wang ◽  
Feng Xiao ◽  
...  
Keyword(s):  
Hydrothermal Synthesis ◽  
Sodium Humate ◽  
Microwave Hydrothermal ◽  
Catalytic Applications ◽  
Cuo Nanorods

scholarly journals Crystal nucleation and growth kinetics of NaF in photo-thermo-refractive glass

2013 ◽  
Vol 378 ◽  
pp. 115-120 ◽  
Author(s):  
I. Dyamant ◽  
A.S. Abyzov ◽  
V.M. Fokin ◽  
E.D. Zanotto ◽  
J. Lumeau ◽  
...  
Keyword(s):  
Growth Kinetics ◽  
Nucleation And Growth ◽  
Crystal Nucleation ◽  
Kinetics Of
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