Stable Electron Emission from ZnO Nanoemitters Grown with Pseudo-Catalyst

2014 ◽  
Vol 1707 ◽  
Author(s):  
Su-Hua Yang ◽  
Yi-Ming Hsu ◽  
Ming-Wei Tsai ◽  
Ting-Jen Hsueh
Keyword(s):  
Aspect Ratio ◽  
Vapor Phase ◽  
Electron Emission ◽  
Seed Layer ◽  
Emission Current Density ◽  
Growth Conditions ◽  
Emission Characteristics ◽  
Vapor Phase Transport ◽  
Turn On ◽  
Phase Transport

ABSTRACTCatalyst-free vapor phase transport was applied for the growth of ZnO nanoemitters. A single-crystalline ZnO:Al seed layer was deposited and used as a pseudo-catalyst. The desired morphology of nanostructures can be achieved by means of modifying the growth rates of crystal planes via adjustment in the growth conditions. The field emission characteristics of ZnO nanoemitters satisfied the Fowler-Nordheim relationship. The high aspect ratio of nanoemitters had a low turn-on electric field of 0.18 MV/m at emission current density of 0.1 μA/cm2. A stable electron emission with a variation of less than 14% was measured.

Effect of Seed Layer on Structural Properties of ZnO Nanorod Arrays Grown by Vapor-Phase Transport

2008 ◽  
Vol 112 (4) ◽  
pp. 990-995 ◽  
Author(s):  
Chun Li ◽  
Guojia Fang ◽  
Jun Li ◽  
Lei Ai ◽  
Binzhong Dong ◽  
...  
Keyword(s):  
Structural Properties ◽  
Vapor Phase ◽  
Seed Layer ◽  
Zno Nanorod ◽  
Nanorod Arrays ◽  
Zno Nanorod Arrays ◽  
Vapor Phase Transport ◽  
Phase Transport

Complex features of the photoluminescence from ZnO nanorods grown by vapor-phase transport method

2021 ◽  
Vol 128 ◽  
pp. 105783
Author(s):  
R.R. Jalolov ◽  
Sh.Z. Urolov ◽  
Z.Sh. Shaymardanov ◽  
S.S. Kurbanov ◽  
B.N. Rustamova
Keyword(s):  
Vapor Phase ◽  
Zno Nanorods ◽  
Vapor Phase Transport ◽  
Vapor Phase Transport Method ◽  
Complex Features ◽  
Phase Transport ◽  
Transport Method

scholarly journals ZnO Nanorod/Graphene Hybrid-Structures Formed on Cu Sheet by Self-Catalyzed Vapor-Phase Transport Synthesis

Nanomaterials ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 450
Author(s):  
Hak Dong Cho ◽  
Deuk Young Kim ◽  
Jong-Kwon Lee
Keyword(s):  
Vapor Phase ◽  
Zno Nanorods ◽  
Light Illumination ◽  
Neutral Donor ◽  
Vapor Phase Transport ◽  
Uv Emission ◽  
Current Voltage ◽  
Device Applications ◽  
Graphene Glass ◽  
Phase Transport

High crystalline ZnO nanorods (NRs) on Zn pre-deposited graphene/Cu sheet without graphene transfer process have been fabricated by self-catalyzed vapor-phase transport synthesis. Here, the pre-deposited Zn metal on graphene not only serves as a seed to grow the ZnO NRs, but also passivates the graphene underneath. The temperature-dependent photoluminescence spectra of the fabricated ZnO NRs reveal a dominant peak of 3.88 eV at 10 K associated with the neutral-donor bound exciton, while the redshifted peak by bandgap shrinkage with temperature and electron-lattice interactions leads a strong emission at 382 nm at room temperature. The optical absorption of the ZnO NRs/graphene hetero-nanostructure at this ultraviolet (UV) emission is then theoretically analyzed to quantify the absorption amount depending on the ZnO NR distribution. By simply covering the ZnO NR/graphene/Cu structure with the graphene/glass as a top electrode, it is observed that the current-voltage characteristic of the ZnO NR/graphene hetero-nanojunction device exhibits a photocurrent of 1.03 mA at 3 V under a light illumination of 100 μW/cm2. In particular, the suggested graphene/ZnO NRs/graphene hybrid-nanostructure-based devices reveal comparable photocurrents at a bidirectional bias, which can be a promising platform to integrate 1D and 2D nanomaterials without complex patterning process for UV device applications.

Progress in Synthesis of Micro- and Mesoporous Composite Molecular Sieve

2011 ◽  
Vol 396-398 ◽  
pp. 1151-1156
Author(s):  
Wen Yuan Wu ◽  
Chun Wei Shi ◽  
Xue Bian
Keyword(s):  
Hydrothermal Synthesis ◽  
Microwave Radiation ◽  
Vapor Phase ◽  
Molecular Sieves ◽  
Molecular Sieve ◽  
Vapor Phase Transport ◽  
Mesoporous Composite ◽  
Composite Molecular Sieve ◽  
Potential Applications ◽  
Phase Transport

Micro- and mesoporous composite molecular sieves enable to achieve grades distribution of pore sizes and appropriate collocation of acidity,which have potential applications in catalysis and adsorption of large molecules.This review focus on some of the most recent results during the last decades.The techniques applied to synthesize different micro-mesoporous composite molecular sieves includes single template, dual template, crystallization of mesoporous walls, alkaline desilication, vapor-phase transport synthesis,and microwave radiation hydrothermal synthesis.

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