scholarly journals ZnO Nanowire Networks as Photoanode Model Systems for Photoelectrochemical Applications

Nanomaterials ◽  
2018 ◽  
Vol 8 (9) ◽  
pp. 693 ◽  
Author(s):  
Liana Movsesyan ◽  
Albert Maijenburg ◽  
Noel Goethals ◽  
Wilfried Sigle ◽  
Anne Spende ◽  
...  
Keyword(s):  
Anatase Phase ◽  
Three Dimensional ◽  
Atomic Layer ◽  
Model Systems ◽  
Zno Nanowire ◽  
Chemical Corrosion ◽  
Tio2 Nanowire ◽  
Nanowire Network ◽  
Nanowire Networks ◽  
3D Networks

In this work, the fabrication of zinc oxide (ZnO) nanowire networks is presented. By combining ion-track technology, electrochemical deposition, and atomic layer deposition, hierarchical and self-supporting three-dimensional (3D) networks of pure ZnO- and TiO2-coated ZnO nanowires were synthesized. Analysis by means of high-resolution transmission electron microscopy revealed a highly crystalline structure of the electrodeposited ZnO wires and the anatase phase of the TiO2 coating. In photoelectrochemical measurements, the ZnO and ZnO/TiO2 nanowire networks, used as anodes, generated higher photocurrents compared to those produced by their film counterparts. The ZnO/TiO2 nanowire network exhibited the highest photocurrents. However, the protection by the TiO2 coatings against chemical corrosion still needs improvement. The one-dimensionality of the nanowires and the large electrolyte-accessible area make these 3D networks promising photoelectrodes, due to the improved transport properties of photogenerated charge carriers and faster redox reactions at the surface. Moreover, they can find further applications in e.g., sensing, catalytical, and piezoelectric devices.

scholarly journals Giant Magnetoresistance and Magneto-Thermopower in 3D Interconnected NixFe1−x/Cu Multilayered Nanowire Networks

Nanomaterials ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 1133
Author(s):  
Nicolas Marchal ◽  
Tristan da Câmara Santa Clara Gomes ◽  
Flavio Abreu Araujo ◽  
Luc Piraux
Keyword(s):  
Giant Magnetoresistance ◽  
Nanowire Array ◽  
Three Dimensional ◽  
Strong Increase ◽  
Thermoelectric Effect ◽  
Heat Management ◽  
Thermoelectric Effects ◽  
Nanowire Network ◽  
Potential Applications ◽  
Nanowire Networks

The versatility of the template-assisted electrodeposition technique to fabricate complex three-dimensional networks made of interconnected nanowires allows one to easily stack ferromagnetic and non-magnetic metallic layers along the nanowire axis. This leads to the fabrication of unique multilayered nanowire network films showing giant magnetoresistance effect in the current-perpendicular-to-plane configuration that can be reliably measured along the macroscopic in-plane direction of the films. Moreover, the system also enables reliable measurements of the analogous magneto-thermoelectric properties of the multilayered nanowire networks. Here, three-dimensional interconnected NixFe1−x/Cu multilayered nanowire networks (with 0.60≤x≤0.97) are fabricated and characterized, leading to large magnetoresistance and magneto-thermopower ratios up to 17% and −25% in Ni80Fe20/Cu, respectively. A strong contrast is observed between the amplitudes of magnetoresistance and magneto-thermoelectric effects depending on the Ni content of the NiFe alloys. In particular, for the highest Ni concentrations, a strong increase in the magneto-thermoelectric effect is observed, more than a factor of 7 larger than the magnetoresistive effect for Ni97Fe3/Cu multilayers. This sharp increase is mainly due to an increase in the spin-dependent Seebeck coefficient from −7 µV/K for the Ni60Fe40/Cu and Ni70Fe30/Cu nanowire arrays to −21 µV/K for the Ni97Fe3/Cu nanowire array. The enhancement of the magneto-thermoelectric effect for multilayered nanowire networks based on dilute Ni alloys is promising for obtaining a flexible magnetic switch for thermoelectric generation for potential applications in heat management or logic devices using thermal energy.

Three-Dimensional Ni/TiO2 Nanowire Network for High Areal Capacity Lithium Ion Microbattery Applications

Nano Letters ◽  
2012 ◽  
Vol 12 (2) ◽  
pp. 655-660 ◽  
Author(s):  
Wei Wang ◽  
Miao Tian ◽  
Aziz Abdulagatov ◽  
Steven M. George ◽  
Yung-Cheng Lee ◽  
...  
Keyword(s):  
Three Dimensional ◽  
Lithium Ion ◽  
Tio2 Nanowire ◽  
Nanowire Network ◽  
Areal Capacity

Ultrafast UV response detectors based on multi-channel ZnO nanowire networks

RSC Advances ◽  
2015 ◽  
Vol 5 (127) ◽  
pp. 105288-105291 ◽  
Author(s):  
PeiPei He ◽  
Shuanglong Feng ◽  
Shuangyi Liu ◽  
Qikun Li ◽  
Jiwei Qi ◽  
...  
Keyword(s):  
Three Dimensional ◽  
Zno Nanowire ◽  
Uv Detector ◽  
Cvd Method ◽  
Catalyst Free ◽  
Uv Response ◽  
Nanowire Networks

An UV detector based on multi-channel three dimensional ZnO nanowire networks was fabricated via a catalyst-free CVD method.

Surface Photovoltage Study of Indium Phosphide Nanowire Networks

2011 ◽  
Vol 1350 ◽  
Author(s):  
Andrew J. Lohn ◽  
Jin-Woo Han ◽  
Nobuhiko P. Kobayashi
Keyword(s):  
Thin Film ◽  
Indium Phosphide ◽  
Numerical Solutions ◽  
Three Dimensional ◽  
Transport Equations ◽  
Surface Photovoltage ◽  
Nanowire Network ◽  
Nanowire Networks

ABSTRACTSurface photovoltage of three-dimensional networks composed of fused indium phosphide (InP) nanowires is discussed. Particular emphasis is given to the dependence of surface photovoltage on the chopping frequency of light that excites the nanowire network as observed in regions which are laterally separated from the excitation. The nanowire network is modeled as a thin film to simplify numerical solutions to transport equations which aids in the interpretation of diffusion and drift of photo-generated carriers within the nanowire network.

Synergistic effects of three-dimensional orchid-like TiO2 nanowire networks and plasmonic nanoparticles for highly efficient mesoscopic perovskite solar cells

2016 ◽  
Vol 4 (19) ◽  
pp. 7322-7329 ◽  
Author(s):  
Haejun Yu ◽  
Jongmin Roh ◽  
Juyoung Yun ◽  
Jyongsik Jang
Keyword(s):  
Solar Cell ◽  
Synergistic Effects ◽  
Power Conversion ◽  
Perovskite Solar Cells ◽  
Three Dimensional ◽  
Perovskite Solar Cell ◽  
Plasmonic Nanoparticles ◽  
Tio2 Nanowire ◽  
Scaffold Structure ◽  
Nanowire Networks

A perovskite solar cell based on a collaborative scaffold structure consisting of orchid-like TiO2 nanowires (OC-TiO2 NWs) and silica-coated Ag@OC-TiO2 NWs exhibited the best power conversion efficiency of 15.09%.

scholarly journals Magneto-Transport in Flexible 3D Networks Made of Interconnected Magnetic Nanowires and Nanotubes

Nanomaterials ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 221
Author(s):  
Tristan da Câmara Santa Clara Gomes ◽  
Nicolas Marchal ◽  
Flavio Abreu Araujo ◽  
Yenni Velázquez Galván ◽  
Joaquín de la Torre Medina ◽  
...  
Keyword(s):  
Magnetic Anisotropy ◽  
Giant Magnetoresistance ◽  
Three Dimensional ◽  
Magnetic Nanostructures ◽  
Angle Distribution ◽  
Magnetic Nanowires ◽  
Magnetic Field Sensors ◽  
Flexible Polymer ◽  
Nanowire Networks ◽  
3D Networks

Electrochemical deposition of interconnected nanowires and nanotubes made of ferromagnetic metals into track-etched polycarbonate templates with crossed nanochannels has been revealed suitable for the fabrication of mechanically stable three-dimensional magnetic nanostructures with large surface area. These 3D networks embedded into flexible polymer membranes are also planar and lightweight. This fabrication technique allows for the control of the geometric characteristics and material composition of interconnected magnetic nanowire or nanotube networks, which can be used to fine-tune their magnetic and magneto-transport properties. The magnetostatic contribution to the magnetic anisotropy of crossed nanowire networks can be easily controlled using the diameter, packing density, or angle distribution characteristics. Furthermore, the fabrication of Co and Co-rich NiCo alloy crossed nanowires with textured hcp phases leads to an additional significant magnetocrystalline contribution to the magnetic anisotropy that can either compete or add to the magnetostatic contribution. The fabrication of an interconnected nanotube network has also been demonstrated, where the hollow core and the control over the tube wall thickness add another degree of freedom to control the magnetic properties and magnetization reversal mechanisms. Finally, three-dimensional networks made of interconnected multilayered nanowire with a succession of ferromagnetic and non-magnetic layers have been successfully fabricated, leading to giant magnetoresistance responses measured in the current-perpendicular-to-plane configuration. These interconnected nanowire networks have high potential as integrated, reliable, and stable magnetic field sensors; magnetic devices for memory and logic operations; or neuromorphic computing.

Solution-Processed ZnO Nanowire Network Thin Film Transistors for Transparent Electronics

2005 ◽  
Vol 905 ◽  
Author(s):  
Teymur Bakhishev ◽  
Steven Volkman ◽  
Vivek Subramanian
Keyword(s):  
Surface Coverage ◽  
Low Cost ◽  
Zinc Nitrate ◽  
Transparent Electronics ◽  
Zno Nanowire ◽  
High Brightness ◽  
Actual Surface ◽  
Nanowire Network ◽  
Nanowire Networks ◽  
Bottom Gate

AbstractWe describe a process to grow ZnO nanowires in aqueous solution of Hexamine and Zinc Nitrate to obtain a network of nanowires 0.5-1.5μm long. The growth was initiated on ZnO nanoparticles spun-cast onto thermal SiO2. We demonstrate bottom-gate FET structures formed using these nanowire networks as channel layers with gold (Au) and aluminum (Al) source/drain pads. Resulting transistors are well-behaved with on-off ratios >104 and mobility >10-2 cm2/V-s, calculated without accounting for actual surface coverage of nanowires. Actual nanowire mobility is therefore substantially higher, attesting to the potential for this technique as a method for realizing low-cost, high-brightness displays.

scholarly journals Microstructure and Fluctuation-Induced Conductivity Analysis of Bi2Sr2CaCu2O8+δ (Bi-2212) Nanowire Fabrics

Crystals ◽  
2020 ◽  
Vol 10 (11) ◽  
pp. 986
Author(s):  
Michael Rudolf Koblischka ◽  
Anjela Koblischka-Veneva ◽  
XianLin Zeng ◽  
Essia Hannachi ◽  
Yassine Slimani
Keyword(s):  
Three Dimensional ◽  
Short Wave ◽  
Superconducting Transition ◽  
Fiber Mats ◽  
Nanowire Network ◽  
Fluctuation Induced Conductivity ◽  
The Individual ◽  
Nanofiber Mats ◽  
Nanowire Networks ◽  
First Time

Resistance measurements were performed on Bi2Sr2CaCu2O8+δ (Bi-2212) fabric-like nanowire networks or nanofiber mats in the temperature interval 3 K ≤T≤ 300 K. The nanowire fabrics were prepared by means of electrospinning, and consist of long (up to 100 μm) individual nanowires with a mean diameter of 250 nm. The microstructure of the nanowire network fiber mats and of the individual nanowires was thoroughly characterized by electron microscopy showing that the nanowires can be as thin as a single Bi-2212 grain. The polycrystalline nanowires are found to have a texture in the direction of the original polymer nanowire. The overall structure of the nanofiber mats is characterized by numerous interconnects among the nanowires, which enable current flow across the whole sample. The fluctuation-induced conductivity (excess conductivity) above the superconducting transition temperature, Tc, was analyzed using the Aslamzov-Larkin model. Four distinct fluctuation regimes (short-wave, two-dimensional, three-dimensional and critical fluctuation regimes) could be identified in the Bi-2212 nanowire fabric samples. These regimes in such nanowire network samples are discussed in detail for the first time. Based on this analysis, we determine several superconducting parameters from the resistance data.

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