Growth and gas sensing characteristics of p- and n-type ZnO nanostructures

Ramgir, Niranjan S.; Ghosh, Manoranjan; Veerender, P.; Datta, Niyanta; Kaur, Manmeet; Aswal, D. K.; Gupta, S. K.

doi:10.1016/j.snb.2011.02.058

Cited by 79 publications

(26 citation statements)

References 32 publications

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“…50,51 The reason behind the power law dependence is associated with the interaction or adsorption of NH 3 molecules on the sensing surface and with the change of surface potential. The power law fit to the linear portion of the response (S) and concentration (C) curve is shown in the inset of Fig.…”

Section: Gas Sensing Properties Of Nanowiresmentioning

confidence: 99%

Probing the highly efficient room temperature ammonia gas sensing properties of a luminescent ZnO nanowire array prepared via an AAO-assisted template route

et al. 2014

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Here, we report the facile synthesis of a highly ordered luminescent ZnO nanowire array using a low temperature anodic aluminium oxide (AAO) template route which can be economically produced in large scale quantity. The as-synthesized nanowires have diameters ranging from 60 to 70 nm and length ∼11 µm. The photoluminescence spectrum reveals that the AAO/ZnO assembly has a strong green emission peak at 490 nm upon excitation at a wavelength of 406 nm. Furthermore, the ZnO nanowire array-based gas sensor has been fabricated by a simple micromechanical technique and its NH 3 gas sensing properties have been explored thoroughly. The fabricated gas sensor exhibits excellent sensitivity and fast response to NH 3 gas at room temperature. Moreover, for 50 ppm NH 3 concentration, the observed value of sensitivity is around 68%, while the response and recovery times are 28 and 29 seconds, respectively. The present synthesis technique to produce a highly ordered ZnO nanowire array and a fabricated gas sensor has great potential to push the low cost gas sensing nanotechnology.

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Section: Gas Sensing Properties Of Nanowiresmentioning

confidence: 99%

Probing the highly efficient room temperature ammonia gas sensing properties of a luminescent ZnO nanowire array prepared via an AAO-assisted template route

et al. 2014

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“…Gas sensing measurements were performed in a static gas sensing setup [6]. For this pt-wire heater and Pt-IOO were attached at the backside of the sensor film to control and monitor the operating temperature.…”

Section: B Gas Sensing Measurementsmentioning

confidence: 99%

NH3 sensing characteristics of pure and Al modified WO<inf>3</inf> thin films

Goyal

Ramgir

Sharma

et al. 2013

International Conference on Advanced Nanomaterials &Amp; Emerging Engineering Technologies

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Ahstract-Ammonia sensing properties of pure and Al compared. Al modified W03 thin films exhibited a superior modified W03 thin films prepared using RF sputtering sensing performance towards NH3.have been investigated. Both the sensor films exhibited a maximum response at an operating temperature of 250°C.Modification with Al has been demonstrated to improve the response kinetics in particular the response time (6 min) in comparison to that of pure W03 (8 min) towards NH3 (100 ppm). Interestingly, both the sensor films showed an increase in resistance i.e., a p-type behavior upon exposure to NH3•

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“…Great interest has been devoted on gas sensors utilizing various materials in zero-dimensional (0-D) nano-crystals [18] nanoparticles [42], one-dimensional (1-D) nanorods (NRs) [35], nanowires (NWs) [12 ], nanobelts (NBs) [43], nanotubes (NTs) ( [8], as well as two-dimensional (2D) nanosheets [44], nanoplates [ 45] , and nanodisks [46 ].…”

Section: Introductionmentioning

confidence: 99%