Journal ArticleDOI
Photoresponse of sol-gel-synthesized ZnO nanorods
Seung-Eon Ahn,Jong-Soo Lee,Hyun-Suk Kim,Sangsig Kim,Byung Hyun Kang,Kang Hyun Kim,Gyu Tae Kim +6 more
TLDR
In this paper, ZnO nanorods were grown on SiO2/Si substrates by a sol-gel method at low temperatures of around T=95 °C.Abstract:
ZnO nanorods were grown on SiO2/Si substrates by a sol-gel method at low temperatures of around T=95 °C. The diameters and the lengths of ZnO nanorods increased at high concentrations of zinc nitrate hexahydrate and methenamine solution. Current–voltage characteristics of the ZnO nanorods network followed a typical nonlinear behavior with significant photoresponse below λ<400 nm in air, and the conductance was enhanced in vacuum with negligible photoresponse. In photoluminescence (PL) and photocurrent (PC) spectra, the PL peak (λpeak=380 nm and 3.26 eV) did not match the PC edge (λedge=400 nm and 3.1 eV), indicating the nondirect band-gap transition in photocurrent. The origin of the photocurrent was discussed from the point of the influence of the desorption of adsorbed water molecules on the surface or inside the ZnO nanorods.read more
Citations
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Journal ArticleDOI
ZnO nanorods: synthesis, characterization and applications
TL;DR: A review of current research activities on ZnO nanorods (or nanowires) can be found in this paper, where a wide range of interesting properties such as luminescence, field emission, gas sensing and electron transport, as well as various intriguing applications are discussed.
Journal ArticleDOI
Photoconductive characteristics of single-crystal CdS nanoribbons.
TL;DR: CdS nanoribbon has the response speed substantively faster than those ever reported for conventional film and bulk CdS materials and the size ofnanoribbons has a significant influence on the responsespeed with smaller Cd S nanorIBbons showing higher response speed.
Journal ArticleDOI
Adsorption and desorption of oxygen probed from ZnO nanowire films by photocurrent measurements
TL;DR: In this paper, the authors investigated the sensing mechanisms of ZnO nanowire films by performing transient photocurrent measurements and found that the current jumps upon ultraviolet or green laser illumination.
Journal ArticleDOI
A Comprehensive Review of One-Dimensional Metal-Oxide Nanostructure Photodetectors
TL;DR: This article provides a comprehensive review on the state-of-the-art research activities in the photodetector field on the metal oxide 1D nanostructures such as ZnO, SnO2, Cu2O, Ga2O 3, Fe2O3, In2O4, CdO, CeO2 and their photoresponses.
Journal Article
A comprehensive review of one-dimensional metal-oxide nanostructure photodetectors
TL;DR: One-dimensional (1D) metal-oxide nanostructures are ideal systems for exploring a large number of novel phenomena at the nanoscale and investigating size and dimensionality dependence of nanostructure properties for potential applications as discussed by the authors.
References
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Room-temperature ultraviolet nanowire nanolasers
Michael H. Huang,Samuel S. Mao,Henning Feick,Haoquan Yan,Yiying Wu,Hannes Kind,Eicke R. Weber,Richard E. Russo,Peidong Yang,Peidong Yang +9 more
TL;DR: Room-temperature ultraviolet lasing in semiconductor nanowire arrays has been demonstrated and self-organized, <0001> oriented zinc oxide nanowires grown on sapphire substrates were synthesized with a simple vapor transport and condensation process.
Journal ArticleDOI
Mechanisms behind green photoluminescence in ZnO phosphor powders
Karel Vanheusden,William L. Warren,Carleton H. Seager,David R. Tallant,J. A. Voigt,Bruce E. Gnade +5 more
TL;DR: In this article, the authors explore the interrelationships between the green 510 nm emission, the free-carrier concentration, and the paramagnetic oxygen vacancy density in commercial ZnO phosphors by combining photoluminescence, optical absorption, and electron paramagnetic resonance spectroscopies.
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Catalytic Growth of Zinc Oxide Nanowires by Vapor Transport
TL;DR: In this paper, the capacitance matrix was calculated for different chain lengths using the software package FastCap MIT (1992) and a ligand shell dielectric constant of 3.14 aF.
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Growth of Arrayed Nanorods and Nanowires of ZnO from Aqueous Solutions
TL;DR: In this article, a template-less and surfactant-free aqueous method is proposed to generate metal oxide thin films with controlled complexity. But the synthesis involves a templateless and a surfactent-free approach, which enables the generation of, at large-scale, low-cost, and moderate temperatures, advanced metal oxide particle-to-particle thin films.
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Nanowire ultraviolet photodetectors and optical switches
TL;DR: In this paper, the photoconducting properties of individual semiconductor nanowires are explored and the authors show the possibility of creating highly sensitive nanowire switches by exploring the photocconducting properties.