Direct Measurement of Band Edge Discontinuity in Individual Core–Shell Nanowires by Photocurrent Spectroscopy

Nano Letters ◽  
2013 ◽  
Vol 13 (9) ◽  
pp. 4152-4157 ◽  
Author(s):  
Guannan Chen ◽  
Guan Sun ◽  
Yujie J. Ding ◽  
Paola Prete ◽  
Ilio Miccoli ◽  
...  
Keyword(s):  
Direct Measurement ◽  
Band Edge ◽  
Core Shell ◽  
Photocurrent Spectroscopy ◽  
Shell Nanowires ◽  
Individual Core

Polarization anisotropy of individual core/shell GaAs/AlGaAs nanowires by photocurrent spectroscopy

2011 ◽  
Vol 98 (15) ◽  
pp. 153106 ◽  
Author(s):  
Anna Persano ◽  
Bahram Nabet ◽  
Antonietta Taurino ◽  
Paola Prete ◽  
Nico Lovergine ◽  
...  
Keyword(s):  
Core Shell ◽  
Polarization Anisotropy ◽  
Photocurrent Spectroscopy ◽  
Individual Core

Ferromagnetic ZnO-TiO2 Core-Shell Nanowire PhotoCatalyst with High Efficiency and Recyclability

2011 ◽  
Vol 90-93 ◽  
pp. 1702-1705
Author(s):  
Xi Zhang ◽  
Gang Xiang
Keyword(s):  
High Efficiency ◽  
Hole Concentration ◽  
Band Gaps ◽  
The Other ◽  
Band Edge ◽  
Core Shell ◽  
Hole Density ◽  
The Core ◽  
Recyclable Photocatalyst ◽  
Shell Nanowires

We demonstrate the design of the recyclable photocatalyst based on ferromagnetic (FM) ZnO- TiO2 core-shell nanowires (NWs). Since the band gaps and band edge energies of bulk ZnO and anatase TiO2 are equal to each other within about 45mV, TiO2 and ZnO can form an p-p+ heterojunction free of band discontinuities and with a built-in potential. The resulting radial field will increase hole density in the TiO2 layer while reduce hole concentration at the interface between the core and the shell, which in turn will decrease the rate of recombination in the photocatalytic TiO2, and hence increase the efficiency of photocatalyst. On the other hand, the NWs with FM cores can be easily collected and refreshed using solenoid and suitable for the recyclable usage of the NW catalyst

Activation of an intense near band edge emission from ZnTe/ZnMgTe core/shell nanowires grown on silicon

2013 ◽  
Vol 24 (36) ◽  
pp. 365201 ◽  
Author(s):  
P Wojnar ◽  
M Szymura ◽  
W Zaleszczyk ◽  
Ł Kłopotowski ◽  
E Janik ◽  
...  
Keyword(s):  
Band Edge ◽  
Near Band Edge Emission ◽  
Near Band Edge ◽  
Core Shell ◽  
Band Edge Emission ◽  
Edge Emission ◽  
Shell Nanowires

Direct Measurement of Coherency Limits for Strain Relaxation in Heteroepitaxial Core/Shell Nanowires

Nano Letters ◽  
2012 ◽  
Vol 13 (5) ◽  
pp. 1869-1876 ◽  
Author(s):  
Shadi A. Dayeh ◽  
Wei Tang ◽  
Francesca Boioli ◽  
Karen L. Kavanagh ◽  
He Zheng ◽  
...  
Keyword(s):  
Direct Measurement ◽  
Strain Relaxation ◽  
Core Shell ◽  
Shell Nanowires

Emission Enhancement of SiC/SiO2 Core/Shell Nanowires Induced by the Oxide Shell

2012 ◽  
Vol 717-720 ◽  
pp. 557-560 ◽  
Author(s):  
Filippo Fabbri ◽  
Francesca Rossi ◽  
Giovanni Attolini ◽  
Matteo Bosi ◽  
Giancarlo Salviati ◽  
...  
Keyword(s):  
Band Gap ◽  
Band Edge ◽  
Oxide Shell ◽  
Near Band Edge ◽  
Core Shell ◽  
Type I ◽  
Edge Luminescence ◽  
Sio2 Shell ◽  
Band Edge Luminescence ◽  
Shell Nanowires

In this work we report the enhancement of the 3C-SiC band edge luminescence induced by the SiO2 shell in SiC/SiO2 core/shell nanowires (NWs) system. We demonstrate that the shell enhances the SiC near band edge luminescence and we argue the formation of a type-I quantum well between the SiC core and the SiO2 shell, with the consequent injection of carriers from the larger band-gap shell to the narrower band-gap core.

Polarization dependent photocurrent spectroscopy of single wurtzite GaAs/AlGaAs core-shell nanowires

2013 ◽  
Vol 102 (14) ◽  
pp. 142107 ◽  
Author(s):  
D. C. Kim ◽  
D. L. Dheeraj ◽  
B. O. Fimland ◽  
H. Weman
Keyword(s):  
Core Shell ◽  
Photocurrent Spectroscopy ◽  
Shell Nanowires

One-Dimensional TiO2@GaON Core-Shell Nanowires with Controlled Shell Thickness from Atomic Layer Deposition for Stable and Efficient Photoelectrochemical Water Splitting

2019 ◽  
Author(s):  
Jiajia Tao ◽  
Hong-Ping Ma ◽  
Kaiping Yuan ◽  
Yang Gu ◽  
Jianwei Lian ◽  
...  
Keyword(s):  
Atomic Layer Deposition ◽  
Band Gap ◽  
Water Splitting ◽  
Atomic Layer ◽  
Photoelectrochemical Water Splitting ◽  
Core Shell ◽  
Photoelectrochemical Performance ◽  
Highly Efficient ◽  
Layer Deposition ◽  
Shell Nanowires

<div>As a promising oxygen evolution reaction semiconductor, TiO2 has been extensively investigated for solar photoelectrochemical water splitting. Here, a highly efficient and stable strategy for rationally preparing GaON cocatalysts on TiO2 by atomic layer deposition is demonstrated, which we show significantly enhances the</div><div>photoelectrochemical performance compared to TiO2-based photoanodes. For TiO2@20 nm-GaON core-shell nanowires a photocurrent density up to 1.10 mA cm-2 (1.23 V vs RHE) under AM 1.5 G irradiation (100 mW cm-2) has been achieved, which is 14 times higher than that of TiO2 NWs. Furthermore, the oxygen vacancy formation on GaON as well as the band gap matching with TiO2 not only provides more active sites for water oxidation but also enhances light absorption to promote interfacial charge separation and migration. Density functional theory studies of model systems of GaON-modified TiO2 confirm the band gap reduction, high reducibility and ability to activate water. The highly efficient and stable systems of TiO2@GaON core-shell nanowires provide a deeper understanding and universal strategy for enhancing photoelectrochemical performance of photoanodes now available. </div>

scholarly journals Broadband Meta‐Absorber with Au/Ni Core–Shell Nanowires for Solar Vapor Generator

2021 ◽  
Vol 5 (7) ◽  
pp. 2100185
Author(s):  
Soomin Son ◽  
Jaemin Park ◽  
Sucheol Ju ◽  
Daihong Huh ◽  
Junho Jun ◽  
...  
Keyword(s):  
Core Shell ◽  
Vapor Generator ◽  
Shell Nanowires
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