Journal ArticleDOI
Ultraviolet photoconductive sensor based on single ZnO nanowire
Oleg Lupan,Oleg Lupan,Guangyu Chai,Lee Chow,Gennadi A. Emelchenko,Helge Heinrich,Veaceslav Ursaki,Veaceslav Ursaki,A. N. Gruzintsev,Ion Tiginyanu,Ion Tiginyanu,A. N. Redkin +11 more
TLDR
In this paper, the photoresponse and characteristics of the ZnO nanowire-device demonstrates that focused ion beam process offers a way to fabricate novel nanodevices on a single ZnOs with diameters as small as 100 nm.Abstract:
ZnO nanowires were synthesized by the CVD procedure and have been investigated by SEM, TEM, SAED, Raman, and cw PL spectroscopy. The fabrication of an ultraviolet (UV) photoconductive detector based on single ZnO nanowire (100 nm in diameter) is presented. This nanostructure detector is prepared in an Focused Ion Beam (FIB) set-up by using nanodeposition for metal electrodes. The photoresponse of the UV sensor are studied using a UV source with an incident peak wavelength of 365 nm. It was demonstrated that the output signal of the sensors is reproducible under UV irradiation. The photoresponse and characteristics of the ZnO nanowire-device demonstrates that focused ion beam process offers a way to fabricate novel nanodevices on a single ZnO nanowire with diameters as small as 100 nm. The presented single ZnO nanowire sensor proves to be promising for application in various processes.read more
Citations
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Journal ArticleDOI
Rapid fabrication technique for interpenetrated ZnO nanotetrapod networks for fast UV sensors.
Dawit Gedamu,Ingo Paulowicz,Sören Kaps,Oleg Lupan,Oleg Lupan,Sebastian Wille,Galina Haidarschin,Yogendra Kumar Mishra,Rainer Adelung +8 more
TL;DR: Two flame-based synthesis methods are presented for fabricating ZnO-nanostructure-based UV photodetectors: burner flame transport synthesis (B-FTS) and crucible flame transporthesis (C-F TS).
Journal ArticleDOI
Low-dimensional nanostructure ultraviolet photodetectors.
TL;DR: This article provides a brief summary about recent progress on LD nanostructures based visible-light-blind ultraviolet photodetectors and an outlook on the future developments of this research field are highlighted.
Journal ArticleDOI
Ultraporous Electron‐Depleted ZnO Nanoparticle Networks for Highly Sensitive Portable Visible‐Blind UV Photodetectors
TL;DR: A hierarchical nano- and microstructured morphology for visible-blind UV photo-detectors is developed, which provides record-high milliampere photocurrents, nanoampere dark currents, and excellent selectivity to ultralow UV light intensities.
Journal ArticleDOI
Energy Harvesting for Nanostructured Self-Powered Photodetectors
TL;DR: In this article, the energy-havesting techniques are discussed and their prospects for application in self-powered photodetectors are summarized, and potential future directions of this research area are highlighted.
Journal ArticleDOI
Silver-doped zinc oxide single nanowire multifunctional nanosensor with a significant enhancement in response
Oleg Lupan,V. Cretu,Vasile Postica,Mahdi Ahmadi,Beatriz Roldan Cuenya,Beatriz Roldan Cuenya,Lee Chow,Ion Tiginyanu,Bruno Viana,Thierry Pauporté,Rainer Adelung +10 more
TL;DR: In this article, the performance of nanosensors based on a single nanowire of silver-doped zinc oxide (ZnO:Ag) was investigated and an increase in current value of about two orders in magnitude I UVON / I UVOFF was observed under exposure to UV light.
References
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Journal ArticleDOI
ZnO Nanowire UV Photodetectors with High Internal Gain
Cesare Soci,Arthur Zhang,Bin Xiang,Shadi A. Dayeh,David P. R. Aplin,Jeongwon Park,Xinyu Bao,Yu-Hwa Lo,Deli Wang +8 more
TL;DR: Despite the slow relaxation time, the extremely high internal gain of ZnO NW photodetectors results in gain-bandwidth products higher than approximately 10 GHz, which promise a new generation of phototransistors for applications such as sensing, imaging, and intrachip optical interconnects.
Journal ArticleDOI
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.
Journal ArticleDOI
ZnO - nanostructures, defects, and devices
TL;DR: ZnO has received much attention over the past few years because it has a wide range of properties that depend on doping, including a range of conductivity from metallic to insulating (including n-type and p-type conductivity), high transparency, piezoelectricity, widebandgap semiconductivity, room-temperature ferromagnetism, and huge magneto-optic and chemical-sensing effects.
Journal ArticleDOI
Bound exciton and donor–acceptor pair recombinations in ZnO
Bruno K. Meyer,H. Alves,Detlev M. Hofmann,W. Kriegseis,D. Forster,Frank Bertram,Jürgen Christen,Axel Hoffmann,M. Straßburg,M. Dworzak,U. Haboeck,Anna V. Rodina +11 more
TL;DR: In this paper, the optical properties of excitonic recombinations in bulk, n-type ZnO are investigated by photoluminescence (PL) and spatially resolved cathodoluminecence (CL) measurements.
Journal ArticleDOI
Temperature dependence of Raman scattering in ZnO
Ramón Cuscó,Esther Alarcon-Llado,Jordi Ibáñez,Luis Artús,Juan Jiménez,Buguo Wang,Michael J. Callahan +6 more
TL;DR: In this paper, a Raman scattering study of wurtzite was carried out over a temperature range from 80 to 750°C, where the second-order Raman features were interpreted in the light of recent ab initio phonon density of states calculations.