The sensitivity of gas sensor based on single ZnO nanowire modulated by helium ion radiation

Liao, Lei; Lu, Hongbing; Li, J. C.; Liu, C.; Fu, Dejun; Liu, Y. L.

doi:10.1063/1.2800812

Cited by 159 publications

(113 citation statements)

References 19 publications

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“…However, one of the significant differences between nanostructures and an epilayer is the larger surface-to-volume ratio of the former. This large surface-to-volume ratio can be an advantage for some applications, for example sensor devices [1][2][3][4][5]. However, it can also be a problem in other applications, for example, optoelectronic devices such as light emitting diodes [12] and solar-cell [13][14] devices, since surface states are created within the band gap region either because of surface inhomogeneities like nonstoichiometry or because of the selective adsorption of foreign species in addition to the abrupt termination of lattice periodicity.…”

Section: Introductionmentioning

confidence: 99%

“…Especially, quasi-one-dimensional ZnO nanostructures (e.g. nanorods, nanowires, nanotubes and nanobelts) have been considered highly potential for sensor application such as gas sensor [1][2] and biosensor [3][4][5], and nanophotonic applications such as nanolasers [6][7][8], optical waveguides [9][10][11], and light emitting diodes [12]. However, one of the significant differences between nanostructures and an epilayer is the larger surface-to-volume ratio of the former.…”

Section: Introductionmentioning

confidence: 99%

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Origin of the surface recombination centers in ZnO nanorods arrays by X-ray photoelectron spectroscopy

Yang

Zhao

Willander

et al. 2010

Applied Surface Science

110

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The surface composition of as-grown and annealed ZnO nanorods arrays (ZNAs) grown by a two-steps chemical bath deposition method has been investigated by Xray photoelectron spectroscopy (XPS). XPS confirms the presence of OH bonds and specific chemisorbed oxygen on the surface of ZNAs, as well as H bonds on 0) 1 (10 surfaces which has been first time observed in the XPS spectra. The experimental results indicated that the OH and H bonds play the dominant role in facilitating surface recombination but specific chemisorbed oxygen also likely affect the surface recombination. Annealing can largely remove the OH and H bonds and transform the composition of the other chemisorbed oxygen at the surface to more closely resemble that of high temperature grown ZNAs, all of which suppresses surface recombination according to time-resolved photoluminescence measurements.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Origin of the surface recombination centers in ZnO nanorods arrays by X-ray photoelectron spectroscopy

Yang

Zhao

Willander

et al. 2010

Applied Surface Science

110

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“…Not only can point defects be created, [1][2][3] but also when the electron or ion energies increase, extensive amounts of materials can be displaced, leading to significant structural and chemical modifications. [4][5][6] For example, electron irradiation produces unusual mechanical changes because the reformation of chemical bonds considerably alters the plasticity of nanomaterials.…”

Section: Introductionmentioning

confidence: 99%

Phase transformation of PbSe/CdSe nanocrystals from core-shell to Janus structure studied by photoemission spectroscopy

et al. 2013

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Photoelectron spectroscopic measurements have been performed, with synchrotron radiation on PbSe/CdSe heteronanocrystals that initially consist of core-shell structures. The study of the chemical states of the main elements in the nanocrystals shows a reproducible and progressive change in the valence-band and core-level spectra under photon irradiation, whatever the core and shell sizes are. Such chemical modifications are explained in light of transmission electron microscopy observations and reveal a phase transformation of the nanocrystals: The core-shell nanocrystals undergo a morphological change toward a Janus structure with the formation of semidetached PbSe and CdSe clusters. Photoelectron spectroscopy gives new insight into the reorganization of the ligands anchored at the surface of the nanocrystals and the modification of the electronic structure of these heteronanocrystals.

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“…Specifically, semiconducting ZnO wires have been irradiated with He þ to control density of defect sites. 72 A device was then fabricated with high sensitivity toward detection of H 2 S in air at room temperature. Focused He þ irradiation could be used to rapidly prototype nanosensor devices in which defect generation creates added gas sensitivity.…”

Section: A Selective Defect Generationmentioning

confidence: 99%

Review Article: Advanced nanoscale patterning and material synthesis with gas field helium and neon ion beams

Stanford

Lewis

Mahady

et al. 2017

Journal of Vacuum Science &Amp; Technology B, Nanotechnology and Microelectronics: Materials, Processing, Measurement, and Phen

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Focused ion beam nanoscale synthesis has emerged as a critical tool for selected area nanofabrication. Helium and neon ion beams from the gas field ion source have recently demonstrated unparalleled resolution among other scanning ion beams. In this review, the authors focus on the nanoscale synthesis applications for these ion species which have been demonstrated to date. The applications and recent work can broadly be grouped into the following categories: (1) Monte Carlo simulations, (2) direct-write milling or sputtering, (3) ion beam lithography, (4) selective ion implantation or defect introduction, and (5) gas-assisted processing. A special emphasis is given toward using He þ and Ne þ for the processing of two dimensional materials, as several groups have demonstrated promising results. Finally, the authors will discuss the future outlook of He þ and Ne þ nanoprocessing techniques and applications.

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The sensitivity of gas sensor based on single ZnO nanowire modulated by helium ion radiation

Cited by 159 publications

References 19 publications

Origin of the surface recombination centers in ZnO nanorods arrays by X-ray photoelectron spectroscopy

Origin of the surface recombination centers in ZnO nanorods arrays by X-ray photoelectron spectroscopy

Phase transformation of PbSe/CdSe nanocrystals from core-shell to Janus structure studied by photoemission spectroscopy

Review Article: Advanced nanoscale patterning and material synthesis with gas field helium and neon ion beams

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