Thermodynamic analysis of two‐dimensional crystal growth in nucleated isotactic polypropylene

1996 ◽  
Vol 80 (3) ◽  
pp. 1851-1856 ◽  
Author(s):  
M. Pieruccini ◽  
G. Di Marco ◽  
M. Lanza
Keyword(s):  
Crystal Growth ◽  
Thermodynamic Analysis ◽  
Isotactic Polypropylene ◽  
Two Dimensional ◽  
Dimensional Crystal

Visualization of two-dimensional crystal growth in a monolayer of stearic acid on the electron microscopic scale

1991 ◽  
Vol 201 (1) ◽  
pp. 175-186 ◽  
Author(s):  
K. Iriyama ◽  
T. Araki ◽  
N. Shimada ◽  
M. Iwamoto ◽  
T. Sasaki ◽  
...  
Keyword(s):  
Crystal Growth ◽  
Stearic Acid ◽  
Two Dimensional ◽  
Electron Microscopic ◽  
Microscopic Scale ◽  
Dimensional Crystal

scholarly journals EXPOENTE DE AVRAMI PELA EQUAÇÃO DE JMAK PARA MÉTODO NÃO-ISOTÉRMICO DE ANÁLISE TÉRMICA

2018 ◽  
Vol 1 (2) ◽  
Author(s):  
Salmo Moreira Sidel ◽  
Elio Idalgo ◽  
Keizo Yukimitu ◽  
João Carlos Silos Moraes ◽  
Fabio Alencar Dos Santos
Keyword(s):  
Crystal Growth ◽  
General Theory ◽  
Isothermal Crystallization ◽  
Crystallization Process ◽  
Three Dimensional ◽  
Two Dimensional ◽  
Nucleation Process ◽  
Vitreous System ◽  
Isothermal Measurements ◽  
Dimensional Crystal

This work reports a discussion about of the general theory for phase transformations of Melh-Johnson-Avrami-Kolmogorov in process involving non-isothermal crystallization. This model allows determine as occurs the mechanism of the nucleus formation and of growth of crystalline phases during the crystallization process. To demonstrate the validity this theory, the Avrami exponent (n) of the LiO2-TeO2-WO3 vitreous system was determined from DSC non-isothermal measurements. The obtained results indicate that the nucleation process is volumetric with two-dimensional or three-dimensional crystal growth. DOI: http://dx.doi.org/10.30609/JETI.2018-2.5566

scholarly journals Strain tolerance of two-dimensional crystal growth on curved surfaces

2019 ◽  
Vol 5 (5) ◽  
pp. eaav4028 ◽  
Author(s):  
Kai Wang ◽  
Alexander A. Puretzky ◽  
Zhili Hu ◽  
Bernadeta R. Srijanto ◽  
Xufan Li ◽  
...  
Keyword(s):  
Crystal Growth ◽  
Single Crystals ◽  
Gaussian Curvature ◽  
Growth Dynamics ◽  
Two Dimensional ◽  
Strain Tolerance ◽  
Zero Gaussian Curvature ◽  
Bonnet Theorem ◽  
2D Crystals ◽  
Dimensional Crystal

Two-dimensional (2D) crystal growth over substrate features is fundamentally guided by the Gauss-Bonnet theorem, which mandates that rigid, planar crystals cannot conform to surfaces with nonzero Gaussian curvature. Here, we reveal how topographic curvature of lithographically designed substrate features govern the strain and growth dynamics of triangular WS2 monolayer single crystals. Single crystals grow conformally without strain over deep trenches and other features with zero Gaussian curvature; however, features with nonzero Gaussian curvature can easily impart sufficient strain to initiate grain boundaries and fractured growth in different directions. Within a strain-tolerant regime, however, triangular single crystals can accommodate considerable (<1.1%) localized strain exerted by surface features that shift the bandgap up to 150 meV. Within this regime, the crystal growth accelerates in specific directions, which we describe using a growth model. These results present a previously unexplored strategy to strain-engineer the growth directions and optoelectronic properties of 2D crystals.

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