scholarly journals Direction Controlled Growth of Organic Single Crystals by Novel Growth Methods

10.5772/53037 ◽  
2013 ◽  
Author(s):  
M. Arivanandhan ◽  
V. Natarajan ◽  
K. Sankaranarayanan ◽  
Y. Hayakaw
Keyword(s):  
Single Crystals ◽  
Controlled Growth ◽  
Growth Methods

Low-Temperature Thermal Conductivity of Rubrene Single Crystals: Quantitative Estimation of Defect Density in Bulk and Film Crystals

2009 ◽  
Vol 1154 ◽  
Author(s):  
Yugo Okada ◽  
M. Uno ◽  
Jun Takeya
Keyword(s):  
Thermal Conductivity ◽  
Low Temperature ◽  
Temperature Profile ◽  
Single Crystals ◽  
Gas Phase ◽  
Defect Density ◽  
Quantitative Estimation ◽  
Crystalline Defects ◽  
Growth Methods ◽  
Pronounced Peak

AbstractThermal conductivity of rubrene single crystals is measured for both bulk and film-like crystals down to 0.5 K in order to estimate quantitatively density of crystalline defects through their phonon mean free paths. The temperature profile of the bulk rubrene crystals exhibit pronounced peak at ∼ 10 K in the thermal conductivity as the result of very long mean-free paths of their phonons which indicates extremely low-level defect density in the region of 1015-1016 cm−3 depending on different growth methods. The crystals grown from gas phase tend to have less defects than those grown from solution. It turned out that the film-like crystals have a few times more defect density as the result of the measurement by using newly developed devices for minute crystals.

scholarly journals Recent Developments on Relaxor-PbTiO3 Ferroelectric Crystals

Crystals ◽  
2021 ◽  
Vol 12 (1) ◽  
pp. 56
Author(s):  
Lkhagvasuren Baasandorj ◽  
Zibin Chen
Keyword(s):  
Crystal Growth ◽  
Single Crystal ◽  
Single Crystals ◽  
Single Crystal Growth ◽  
Practical Applications ◽  
Ferroelectric Crystals ◽  
Recent Developments ◽  
Electromechanical Devices ◽  
Growth Methods

Numerous investigations on the development of the relaxor-PbTiO3 ferroelectric crystals have been carried out since their extraordinary properties were revealed. Recent developments on these crystals have offered further advances in electromechanical applications. In this review, recent developments on relaxor-PbTiO3 crystals and their practical applications are reviewed. The single crystal growth methods are first discussed. Two different strategies, poling and doping, for piezoelectric improvement are surveyed in the following section. After this, the anisotropic features of the single crystals are discussed. Application perspectives arising from the property improvements for electromechanical devices are finally reviewed.

scholarly journals (K,Na)NbO3-based piezoelectric single crystals: Growth methods, properties, and applications

2020 ◽  
Vol 35 (8) ◽  
pp. 990-1016 ◽  
Author(s):  
Jurij Koruza ◽  
Hairui Liu ◽  
Marion Höfling ◽  
Mao-Hua Zhang ◽  
Philippe Veber
Keyword(s):  
Single Crystals ◽  
Growth Methods

Abstract

scholarly journals Growth of 4-N,N-Dimethylamino-4'-N'-methyl-stilbazolium Tosylate (DAST) Organic Single Crystals Controlled by Oleic Acid

Crystals ◽  
2019 ◽  
Vol 9 (10) ◽  
pp. 494
Author(s):  
Xin Wen ◽  
Xiangdong Xu ◽  
Huaxin Zhou ◽  
Lu Hu ◽  
Yangyang Jing ◽  
...  
Keyword(s):  
Oleic Acid ◽  
Single Crystals ◽  
Defect Density ◽  
Second Harmonic ◽  
Controlled Growth ◽  
X Ray Diffraction ◽  
Slow Cooling ◽  
Practical Applications ◽  
Optical Band Gaps ◽  
Vis Spectroscopy

4-N,N-Dimethylamino-4'-N'-methyl-stilbazolium Tosylate (DAST) organic single crystals controlled by (Z)-Octadec-9-enoic acid (oleic acid, OA) was grown by a slow-cooling method. The as-grown DAST single crystals were systematically characterized by FTIR, X-ray diffraction, second harmonic generation, and UV-vis spectroscopy. Results indicate that addition of OA into the DAST solutions leads to the controlled growth of DAST single crystals and consequently, the crystal quality and optical properties can be modified. Particularly, the DAST crystals grown under the control of OA exhibit larger sizes, higher crystallinities, and better optical qualities with higher optical band gaps and lower defect density, compared with those grown in the absence of OA. These results are helpful for better understanding the controlled growth of DAST organic single crystals and modifying their properties for practical applications.

Shape-controlled growth and single-crystal XRD study of submillimeter-sized single crystals of SnO

CrystEngComm ◽  
2011 ◽  
Vol 13 (19) ◽  
pp. 5677 ◽  
Author(s):  
Y. Q. Guo ◽  
R. Q. Tan ◽  
X. Li ◽  
J. H. Zhao ◽  
Z. L. Luo ◽  
...  
Keyword(s):  
Single Crystal ◽  
Single Crystals ◽  
Controlled Growth ◽  
Single Crystal Xrd ◽  
Xrd Study ◽  
Shape Controlled

Mesoporous TiO2 Single Crystals: Facile Shape-, Size-, and Phase-Controlled Growth and Efficient Photocatalytic Performance

2013 ◽  
Vol 5 (21) ◽  
pp. 11249-11257 ◽  
Author(s):  
Xiaoli Zheng ◽  
Qin Kuang ◽  
Keyou Yan ◽  
Yongcai Qiu ◽  
Jianhang Qiu ◽  
...  
Keyword(s):  
Single Crystals ◽  
Photocatalytic Performance ◽  
Mesoporous Tio2 ◽  
Controlled Growth

scholarly journals Millimeter-Sized Metal-Organic Framework Single Crystals without Inversion Symmetry: Controlled Growth and Self-Assembly Mechanism

2020 ◽  
Author(s):  
Juan Manuel Garcia Garfido ◽  
javier enriquez ◽  
Ignacio Chi-Duran ◽  
Ivam Jara ◽  
Leonardo Vivas ◽  
...  
Keyword(s):  
Single Crystals ◽  
Self Assembly ◽  
Metal Organic Framework ◽  
Nucleation And Growth ◽  
Crystal Nucleation ◽  
Ex Situ ◽  
External Control ◽  
Controlled Growth ◽  
Metal Organic ◽  
Organic Framework

The controllable growth of non-centrosymmetric metal organic framework (MOF) beyond the conventional micrometer crystal dimensions would represent an enabling step in the development of MOF-based devices for coherent nonlinear optics. This goal has been elusive so far, as MOF crystal typical self-assemble under metastable synthesis conditions that have several competing crystallization pathways open, and only a modest amount of external control over the crystal nucleation and growth rates is currently possible. We overcome some of these issues and achieve the controlled growth of large single crystals of the non-centrosymmetric MOF Zn(3-ptz)<sub>2</sub>, with surface areas of up to 25 mm<sup>2</sup> in 24 hours, in a single solvothermal reaction with <i>in-situ</i> ligand formation. No additional growth steps are necessary. We carry out a mechanistic study to unravel the reaction steps leading to the self-assembly of Zn(3-ptz)<sub>2</sub> crystals, by identifying and isolating several intermediate crystal structures that directly connect with the target MOF, and reversibly interconverting between them. We identify the synthesis parameters that control the size and morphology of our target MOF crystal and model its nucleation and growth kinetics using <i>ex-situ</i> image processing data. Our work is a step forward is understanding and controlling the factors that stabilize the growth of high-quality MOF crystals with sizes that are relevant for coherent optics, thus untapping possible applications of metal-organic frameworks in classical and quantum communication technology.

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