Aspect Ratio Controlled Growth of MnOOH in Mixtures of Mn3O4 and MnOOH Single Crystals for Supercapacitors

2005 ◽  
Vol 8 (5) ◽  
pp. A240-A244 ◽  
Author(s):  
Y.-T. Wu ◽  
C.-C. Hu
Keyword(s):  
Aspect Ratio ◽  
Single Crystals ◽  
Controlled Growth

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.

Solvothermal Routes for Synthesis of Zinc Oxide Nanorods

2005 ◽  
Vol 878 ◽  
Author(s):  
Nelson S. Bell
Keyword(s):  
Zinc Oxide ◽  
Aspect Ratio ◽  
Optical Devices ◽  
Zinc Oxide Nanorods ◽  
Controlled Growth ◽  
Average Dimension ◽  
Oxide Nanorods ◽  
Device Integration ◽  
Novel Applications ◽  
Synthesis Of Nanomaterials

AbstractControl of the synthesis of nanomaterials to produce morphologies exhibiting quantized properties will enable device integration of several novel applications including biosensors, catalysis, and optical devices. In this work, solvothermal routes to produce zinc oxide nanorods are explored. Much previous work has relied on the addition of growth directing/inhibiting agents to control morphology. It was found in coarsening studies that zinc oxide nanodots will ripen to nanorod morphologies at temperatures of 90 to 120 °C. The resulting nanorods have widths of 9-12 nm average dimension, which is smaller than current methods for nanorod synthesis. Use of nanodots as nuclei may be an approach that will allow for controlled growth of higher aspect ratio nanorods.

Effect of aspect ratio on compression of MgO single crystals

1987 ◽  
Vol 6 (7) ◽  
pp. 862-864 ◽  
Author(s):  
K. C. Goretta ◽  
J. L. Routbort
Keyword(s):  
Aspect Ratio ◽  
Single Crystals

Controlled Growth and Application in Lithium and Sodium Batteries of High-Aspect-Ratio, Self-Organized Titania Nanotubes

2013 ◽  
Vol 160 (9) ◽  
pp. A1390-A1398 ◽  
Author(s):  
José R. González ◽  
Ricardo Alcántara ◽  
Gregorio F. Ortiz ◽  
Francisco Nacimiento ◽  
José L. Tirado
Keyword(s):  
Aspect Ratio ◽  
High Aspect Ratio ◽  
Titania Nanotubes ◽  
Controlled Growth ◽  
Self Organized ◽  
Sodium Batteries

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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