Photoluminescence properties of single crystalline ZnO/CdS core/shell one-dimensional nanostructures

2007 ◽  
Vol 61 (16) ◽  
pp. 3535-3538 ◽  
Author(s):  
X.Q. Meng ◽  
D.X. Zhao ◽  
J.Y. Zhang ◽  
D.Z. Shen ◽  
Y.M. Lu ◽  
...  
Keyword(s):  
Core Shell ◽  
Photoluminescence Properties ◽  
Single Crystalline ◽  
One Dimensional ◽  
One Dimensional Nanostructures

Room-temperature magnetoresistance of one-dimensional magnetite (Fe3O4) nanostructures

2004 ◽  
Vol 853 ◽  
Author(s):  
Zuqin Liu ◽  
Daihua Zhang ◽  
Chongwu Zhou
Keyword(s):  
Magnetic Field ◽  
Wall Thickness ◽  
Room Temperature ◽  
Core Shell ◽  
Single Crystalline ◽  
One Dimensional ◽  
Magnetite Fe3o4 ◽  
Prepared Material ◽  
Different Temperatures ◽  
Shell Nanowires

ABSTRACTIn this paper, we present our recent studies on the synthesis and magnetoresistance of single crystalline Fe3O4 core-shell nanowires and nanotubes. Homogeneous Fe3O4 nanowires/tubes with controllable length, diameter and wall thickness were synthesized. The as-prepared material composition and stoichoimetry have been carefully examined and confirmed with a variety of characterization techniques including XRD, EDS, XPS, and TEM. Magnetoresistance under different temperatures was systemically studied. Up to 1.2% room temperature magnetoresistance was observed in the as synthesized nanowires/tubes under a magnetic field of B = 1.8 T.

Core-Shell WO3/TiO2 Nanorod Heterostructures for Solar Light Photocatalysis

2013 ◽  
Vol 850-851 ◽  
pp. 78-81 ◽  
Author(s):  
Peng Guo ◽  
Ling Tao Meng ◽  
Chang Hua Wang
Keyword(s):  
Photocatalytic Activity ◽  
Organic Pollutants ◽  
Chemical Stability ◽  
Light Response ◽  
High Photocatalytic Activity ◽  
Shell Morphology ◽  
Solar Light ◽  
Core Shell ◽  
One Dimensional ◽  
One Dimensional Nanostructures

Heterojunction photocatalyst containing one dimensional nanostructures exhibits interesting size, shape and material-dependent photocatalytic properties compared to single-component counterpart. In this work, we develop a simple two-step strategy to WO3/TiO2 heterojunction based on WO3 nanorods and TiO2 nanoparticles. The as-obtained heterojunction features core-shell morphology and has the advantage of extended solar light response, enhanced chemical stability and easy recyclability. As such, it exhibits high photocatalytic activity toward organic pollutants degradation including rodamine B dye and gaseous acetaldehyde.

Rapid growth and photoluminescence properties of doped ZnS one-dimensional nanostructures

2008 ◽  
Vol 310 (13) ◽  
pp. 3240-3246 ◽  
Author(s):  
R.F. Zhuo ◽  
H.T. Feng ◽  
D. Yan ◽  
J.T. Chen ◽  
J.J. Feng ◽  
...  
Keyword(s):  
Rapid Growth ◽  
Photoluminescence Properties ◽  
One Dimensional ◽  
One Dimensional Nanostructures

scholarly journals Raman Spectroscopic Characterizations of Self-Catalyzed InP/InAs/InP One-Dimensional Nanostructures on InP(111)B Substrate using a Simple Substrate-Tilting Method

2019 ◽  
Vol 14 (1) ◽  
Author(s):  
Jeung Hun Park ◽  
Choong-Heui Chung
Keyword(s):  
Low Frequency ◽  
Chemical Vapor ◽  
Excitation Power ◽  
Organic Chemical ◽  
Core Shell ◽  
Vibration Modes ◽  
Strong Suppression ◽  
One Dimensional ◽  
Frequency Branch ◽  
One Dimensional Nanostructures

AbstractWe report optical phonon vibration modes in ensembles of self-catalyzed InP/InAs/InP multi core-shell one-dimensional nanostructures (nanopillars and nanocones) grown on InP(111)B substrates using liquid indium droplets as a catalyst via metal-organic chemical vapor deposition. We characterized the Raman vibration modes of InAs E1(TO), InAs A1(TO), InAs E1(LO), InP E1(TO), InP A1(LO), and InP E1(LO) from the ensemble of as-grown nanostructures. We also identified second-order Raman vibration modes, associated with InP E1(2TO), E1(LO+TO), and E1(2LO), in the InP/InAs/InP core-shell nanopillars and nanocones. Raman spectra of InP/InAs/InP nanopillars showed redshift and broadening of LO modes at low-frequency branches of InAs and InP. Due to the polar nature in groups III–V nanowires, we observed strong frequency splitting between InAs E1(TO) and InAs A1(LO) in InP/InAs/InP nanocones. The Raman resonance intensities of InP and InAs LO modes are found to be changed linearly with an excitation power. By tilting the substrate relative to the incoming laser beam, we observed strong suppression of low-frequency branch of InP and InAs LO phonon vibrations from InP/InAs/InP nanocones. The integrated intensity ratio of InP E1(TO)/E1(LO) for both nanostructures is almost constant at 0-degree tilt, but the ratio of the nanocones is dramatically increased at 30-degree tilt. Our results suggest that Raman spectroscopy characterization with a simple substrate tilting method can provide new insights into non-destructive characterization of the shape, structure, and composition of the as-grown nanostructures for the wafer-scale growth and integration processing of groups III–V semiconducting hetero-nanostructures into nanoelectronics and photonics applications.

One-dimensional Nanostructures for Photocatalytic Organic Synthesis

2015 ◽  
Vol 19 (6) ◽  
pp. 484-497 ◽  
Author(s):  
Chuang Han ◽  
Siqi Liu ◽  
Zi-Rong Tang ◽  
Yi-Jun Xu
Keyword(s):  
Organic Synthesis ◽  
One Dimensional ◽  
One Dimensional Nanostructures

The Emission Property of Phosphors LEDs Based on ZnCuInS/ZnSe/ZnS Quantum Dots

2014 ◽  
Vol 989-994 ◽  
pp. 623-625
Author(s):  
Ke Bi ◽  
Wen Yan Liu ◽  
Tian Yue Xu ◽  
Tie Qiang Zhang ◽  
Yu Zhang
Keyword(s):  
Quantum Dots ◽  
Photoluminescence Spectrum ◽  
Stokes Shift ◽  
Core Shell ◽  
Photoluminescence Properties ◽  
Red Emission ◽  
Light Emitting ◽  
Quantum Size ◽  
Gan Led ◽  
Photoluminescence Peak

.In this research, ZnCuInS/ZnSe/ZnS quantum dots (QDs) have been studied as an excellent red emitting source for blue GaN LED because of its non-toxic deep red emmission, and large Stokes shift properties. In the paper ZnCuInS/ZnSe/ZnS core/shell quantum dots were prepared with the particle size of 4.5nm. According to the measurement of photoluminescence spectrum emitted by ZnCuInS/ZnSe/ZnS core/shell quantum dots, the emitting peak of 700 nm and the full was achieved as red emitter.It was found that absorption edge and photoluminescence peak shifted to shorter wavelength with decreasing the nanocrystal size due to quantum size effect.Meanwhile, we were prepared ZnCuInS/ZnSe/ZnS core/shell quantum dot light emitting diodes and their photoluminescence properties were studied. After the suitable bias was applied on the films, increasing the ZnCuInS/ZnSe/ZnS QDs concentration in the blue GaN chips, red emission increased with decreasing LED’s blue light.

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