Dopant induced morphology changes in ZnO nanocrystals

Jayanthi, K.; Chawla, Santa; Sood, K.N.; Chhibara, Manisha; Singh, Sumitra

doi:10.1016/j.apsusc.2009.01.032

Cited by 101 publications

(41 citation statements)

References 24 publications

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“…A close observation of the nanocomposites reveals the presence of spherical particles along with the nanorods. The addition of impurities (CdO) overrules the process of nucleation and growth, which in turn results in increased agglomeration and a change in the morphology of ZnO [31].…”

Section: Resultsmentioning

confidence: 99%

ZnO/CdO nanocomposites for textile effluent degradation and electrochemical detection

Saravanan

Gracia

Khan

et al. 2015

Journal of Molecular Liquids

166

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Section: Resultsmentioning

confidence: 99%

ZnO/CdO nanocomposites for textile effluent degradation and electrochemical detection

Saravanan

Gracia

Khan

et al. 2015

Journal of Molecular Liquids

166

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“…Since, all the samples were prepared under identical synthesis conditions; these morphological changes could only be attributed to the strain induced in the lattice by substitutional doping of larger lanthanum ions. Dopant induced morphology change in ZnO particles have also been found with different dopants and synthesis conditions [27,28].…”

Section: Morphologymentioning

confidence: 96%

Dual mode luminescence in rare earth (Er3+/Ho3+) doped ZnO nanoparticles fabricated by inclusive co precipitation technique

Das

Khichar

Chawla

2015

J Mater Sci: Mater Electron

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Dual excitation properties have been introduced in ZnO nanoparticles (*10 nm) through lanthanide (Er 3? /Ho 3? ) doping by inclusive co precipitation at room temperature. Monophasic hexagonal ZnO nanoparticles form hierarchical micro flowers as a consequence of lanthanide doping. The Stokes and anti Stokes emissions were investigated under UV (399 nm) and IR (980 nm) excitation. The down-conversion emission under band edge excitation is in the blue region and the up-conversion (UC) emission of lanthanide doped ZnO nanocrystals exhibit strong green and red fluorescence bands for ZnO:Er 3? and only green band for ZnO:Ho 3? . Post synthesis annealing further improves luminescence properties in ZnO:Er 3? that exhibits triple mode excitation of fluorescence under UV as well as IR wavelengths 980 and 1550 nm, also confirmed by confocal fluorescence mapping. The measured dependence of pump power on UC emission suggest that lanthanide doping in ZnO leads to frequency up-conversion emission via two to three photon absorption processes.

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“…So, the energy required for the removal of physisorbed layer is very less as compared to the energy required for the removal of chemisorbed layer. When moisture comes in contact with V 2 O 5 -ZnO nanocomposite, water molecules irreversibly chemisorb on oxide surface [18]. Chemisorbed layer can be thermally desorbed by increasing temperature.…”

Section: Sensing Principlementioning

confidence: 99%

Application of V<sub>2</sub>O<sub>5</sub>-ZnO Nanocomposite for Humidity Sensing Studies

Pandey¹

2017

IJMSA

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Abstract:Paper reports humidity sensing studies of V 2 O 5 -ZnO nanomaterial. When sample of V 2 O 5 -ZnO annealed at 500°C was exposed to increasing humidity, resistance decreased. Aging over six months was within ±6% for ZnO and ±2% for V 2 O 5 -ZnO; hysteresis was within ±6% for both ZnO and V 2 O 5 -ZnO sensing elements. Grain size for pure ZnO was 620 nm, and 400 nm for V 2 O 5 -ZnO nanomaterial. XRD suggested a distribution of crystallite size. For ZnO-V 2 O 5 , distribution in the crystallites size was as wide as 130% compared to only 20% for ZnO. Sensitivity of ZnO-V 2 O 5 nanomaterial was 500% more compared to ZnO sample.

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Dopant induced morphology changes in ZnO nanocrystals

Cited by 101 publications

References 24 publications

ZnO/CdO nanocomposites for textile effluent degradation and electrochemical detection

ZnO/CdO nanocomposites for textile effluent degradation and electrochemical detection

Dual mode luminescence in rare earth (Er3+/Ho3+) doped ZnO nanoparticles fabricated by inclusive co precipitation technique

Application of V<sub>2</sub>O<sub>5</sub>-ZnO Nanocomposite for Humidity Sensing Studies

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Dopant induced morphology changes in ZnO nanocrystals

Cited by 101 publications

References 24 publications

ZnO/CdO nanocomposites for textile effluent degradation and electrochemical detection

ZnO/CdO nanocomposites for textile effluent degradation and electrochemical detection

Dual mode luminescence in rare earth (Er3+/Ho3+) doped ZnO nanoparticles fabricated by inclusive co precipitation technique

Application of V&lt;sub&gt;2&lt;/sub&gt;O&lt;sub&gt;5&lt;/sub&gt;-ZnO Nanocomposite for Humidity Sensing Studies

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Application of V<sub>2</sub>O<sub>5</sub>-ZnO Nanocomposite for Humidity Sensing Studies