Enhanced photoluminescence of single crystalline ZnO nanotubes in ZnAl2O4 shell

CrystEngComm ◽  
2012 ◽  
Vol 14 (4) ◽  
pp. 1205 ◽  
Author(s):  
Hyun Gil Cha ◽  
Dong In Kang ◽  
Tae Ha Kwon ◽  
Young Soo Kang
Keyword(s):  
Single Crystalline ◽  
Enhanced Photoluminescence ◽  
Zno Nanotubes

scholarly journals Formation of single crystalline ZnO nanotubes without catalysts and templates

2007 ◽  
Vol 90 (11) ◽  
pp. 113108 ◽  
Author(s):  
Samuel L. Mensah ◽  
Vijaya K. Kayastha ◽  
Ilia N. Ivanov ◽  
David B. Geohegan ◽  
Yoke Khin Yap
Keyword(s):  
Single Crystalline ◽  
Zno Nanotubes

Preparation and Characterizations of ZnO Nanotubes by Acidic Etching Nanowires

2008 ◽  
Vol 8 (9) ◽  
pp. 4432-4435 ◽  
Author(s):  
C. Y. Yao ◽  
G. J. Chen ◽  
T. Y. Tseng
Keyword(s):  
Hydrothermal Process ◽  
Hexagonal Structure ◽  
Zno Nanowires ◽  
Experimental Results ◽  
Etching Process ◽  
Dangling Bonds ◽  
Single Crystalline ◽  
Nanowires Growth ◽  
Zno Nanotubes

Single crystalline ZnO nanowires were synthesized by hydrothermal process and then formed nanotubes by acidic etching these nanowires in acetic solution at 85 °C. The nanotube diameter can be easily controlled by dividing the nanowires growth and etching process. The ZnO nanotubes remain single crystalline hexagonal structure after the etching process. The defects existed in the nanowires and the dangling bonds of the nanowires' surface play the important roles for the etching process. An etching model for forming ZnO nanotubes is proposed, which can be proved by our experimental results.

scholarly journals Acetone vapour-assisted growth of 2D single-crystalline organic lead halide perovskite microplates and their temperature-enhanced photoluminescence

RSC Advances ◽  
2018 ◽  
Vol 8 (26) ◽  
pp. 14527-14531 ◽  
Author(s):  
Wenhao Zhai ◽  
Chaoyang Ge ◽  
Xin Fang ◽  
Kun Zhang ◽  
Cheng Tian ◽  
...  
Keyword(s):  
Single Crystalline ◽  
Enhanced Photoluminescence ◽  
Organic Lead ◽  
Acetone Vapour ◽  
Halide Perovskite ◽  
Lead Halide

We report an acetone vapour-assisted method to grow single-crystalline 2D perovskite microplates and find their temperature-enhanced photoluminescence.

(Gd0.95Eu0.05)(OH)3 Nanomaterials via Hydrothermal Processing and their Transformation into Single Crystalline (Gd0.95Eu0.05)2O3 with Enhanced Photoluminescence

2011 ◽  
Vol 320 ◽  
pp. 309-313
Author(s):  
Chang Fa Li ◽  
Ji Guang Li
Keyword(s):  
Energy Transfer ◽  
Solid Solutions ◽  
Ammonium Hydroxide ◽  
The Self ◽  
Hydrothermal Processing ◽  
Phase Conversion ◽  
Single Crystalline ◽  
Enhanced Photoluminescence ◽  
The Eu ◽  
Nitrate Solutions

In this work, hexagonal solid solutions of (Gd0.95Eu0.05)(OH)3with two distinctive morphologies of nanorods and nanotubes were successfully synthesized via hydrothermal treatment of mixed nitrate solutions in the presence of ammonium hydroxide. The hydroxide samples exhibited characteristic Eu3+photoluminescence through the energy transfer from Gd3+to Eu3+and the self-excitation of Eu3+. The hydroxide precursors transformed into cubic (Gd0.95Eu0.05)2O3at ~500 °C via an intermediate monoclinic (Gd0.95Eu0.05)OOH phase, and the Eu3+coordination accordingly experienced symmetry changes fromD3htoC2v, and then toC2/S6. The cubic (Gd0.95Eu0.05)2O3well retained the original morphologies of their polycrystalline precursors and exhibited a single-crystalline character at 1000 °C. Greatly enhanced photoluminescence (~5000 times that of the hydroxides) was observed for the phase conversion.

Large-scale synthesis of single-crystalline ZnO nanotubes based on polymer-inducement

2006 ◽  
Vol 41 (10) ◽  
pp. 1979-1983 ◽  
Author(s):  
Baoyou Geng ◽  
Xiaowang Liu ◽  
Xianwen Wei ◽  
Shaowu Wang
Keyword(s):  
Large Scale ◽  
Single Crystalline ◽  
Zno Nanotubes ◽  
Large Scale Synthesis

Growth and field-emission properties of single-crystalline conic ZnO nanotubes

2006 ◽  
Vol 17 (3) ◽  
pp. 753-757 ◽  
Author(s):  
Ruey-Chi Wang ◽  
Chuan-Pu Liu ◽  
Jow-Lay Huang ◽  
Shu-Jen Chen
Keyword(s):  
Field Emission ◽  
Single Crystalline ◽  
Emission Properties ◽  
Field Emission Properties ◽  
Zno Nanotubes

“Preparation of Single Crystalline Gold Films for ED Studies”

1972 ◽  
Vol 30 ◽  
pp. 634-635
Author(s):  
Joseph D. C. Peng
Keyword(s):  
Crystal Morphology ◽  
Diffraction Theory ◽  
Scattering Matrix ◽  
Vacuum Evaporation ◽  
Gold Films ◽  
Matrix Formulation ◽  
Silver Films ◽  
Single Crystalline ◽  
Grating Pattern ◽  
Stacking Disorder

The relative intensities of the ED spots in a cross-grating pattern can be calculated using N-beam electron diffraction theory. The scattering matrix formulation of N-beam ED theory has been previously applied to imperfect microcrystals of gold containing stacking disorder (coherent twinning) in the (111) crystal plane. In the present experiment an effort has been made to grow single-crystalline, defect-free (111) gold films of a uniform and accurately know thickness using vacuum evaporation techniques. These represent stringent conditions to be met experimentally; however, if a meaningful comparison is to be made between theory and experiment, these factors must be carefully controlled. It is well-known that crystal morphology, perfection, and orientation each have pronounced effects on relative intensities in single crystals.The double evaporation method first suggested by Pashley was employed with some modifications. Oriented silver films of a thickness of about 1500Å were first grown by vacuum evaporation on freshly cleaved mica, with the substrate temperature at 285° C during evaporation with the deposition rate at 500-800Å/sec.

Recombination Characteristics of Single-Crystalline Silicon Wafers with a Damaged Near-Surface Layer

2013 ◽  
Vol 58 (2) ◽  
pp. 142-150 ◽  
Author(s):  
A.V. Sachenko ◽  
◽  
V.P. Kostylev ◽  
V.G. Litovchenko ◽  
V.G. Popov ◽  
...  
Keyword(s):  
Surface Layer ◽  
Crystalline Silicon ◽  
Silicon Wafers ◽  
Single Crystalline Silicon ◽  
Near Surface ◽  
Single Crystalline
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