Ni-doped vertically aligned zinc oxide nanorods prepared by hybrid wet chemical route

Gayen, R.N.; Rajaram, A.; Bhar, R.; Pal, A.K.

doi:10.1016/j.tsf.2009.11.067

Cited by 28 publications

(16 citation statements)

References 35 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…eV has been associated with a transition between a state due to Zn interstials and the valence band [25]. This association is consistent with our data because the increased Zn interstitial concentration may be due to the increasing Zn release rate with increasing amine concentration in the growth solution.…”

Section: Resultssupporting

confidence: 92%

“…The emission peak centered at 3.25 eV corresponds to the band edge emission and the broad defect emission peak centered at 2.5 eV originates from defects, most probably due to oxygen vacancies [23,24]. On increasing the amine:Zn (0.5:1) concentration (figure 6b) the defect emission is suppressed and band edge emission is shifted to 3.2 eV along with the appearance of a blue band emission around 2.9 eV probably associated with Zn interstitials [25]. On further increasing the amine:Zn concentration ratio from 0.75:1 to 2:1 the ratio of Zn interstitial emission at 2.9 eV to band edge emission at 3.2 eV increases (figure 6c,d,e,f).…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Alignment, Morphology and Defect Control of Vertically Aligned ZnO Nanorod Array: Competition between “Surfactant” and “Stabilizer” Roles of the Amine Species and Its Photocatalytic Properties

Ranjith

Pandian

McGlynn

et al. 2014

Crystal Growth & Design

View full text Add to dashboard Cite

We show that the morphology, AbstractWe show that the morphology, defect and alignment of vertically aligned one dimensional ( 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 2 amine concentrations, the role as surfactant dominates over that of stabilizer which does not favor uniform growth due to the slow release of Zn to form ZnO. On increasing the amine concentration, Zn release and amine capping aspects were balanced and this result in uniform and aligned growth of NR arrays. At the higher amine concentrations, the sudden release of Zn generates an overshoot effect, which dominates over the surfactant capping aspect, thus favoring the growth of irregular micro platelets. 1D, well aligned, prismatic, ZnO NR arrays grown at an amine concentration of 1Mshow higher photocatalytic degradation activity for the degradation of Methylene Blue dye solution under UV irradiation owing to both the high surface to volume ratio of the arrays and increased charge carrier density due to Zn interstitial defects. Zinc interstitials are shallow donors readily supply electrons to conduction band which could buildup space charge near to the nanocatalayst surface. The occurrence of band bending associated with the interfacial electric field in the space charge region could facilitate the separation of photogenerated electrons and holes and thus enhances the photocatalytic performance. Understanding the role of amine in the growth of 1D ZnO NR arrays holds great promise for tailoring ZnO NR functionalities for various potential applications

show abstract

Section: Resultssupporting

confidence: 92%

Section: Resultsmentioning

confidence: 99%

Alignment, Morphology and Defect Control of Vertically Aligned ZnO Nanorod Array: Competition between “Surfactant” and “Stabilizer” Roles of the Amine Species and Its Photocatalytic Properties

Ranjith

Pandian

McGlynn

et al. 2014

Crystal Growth & Design

View full text Add to dashboard Cite

show abstract

“…The Raman active mode observed at 326 cm −1 (E2 (high) − E1 (low) ) originated from two phonon processes due to the second-order vibration of ZnO [23]. A similar pattern was observed by Gayen et al [24] and Gao et al [25]. It is noted that the peak intensity increases with increasing the Ni concentration.…”

Section: Resultssupporting

confidence: 81%

Synthesis and Characterization of ZnO and Ni Doped ZnO

Vijayaparkavi

Senthilkumaar

2011

J Supercond Nov Magn

View full text Add to dashboard Cite

ZnO and Zn 1−x Ni x O (x = 1, 2 and 3 mol %) were prepared by the sol gel via ultrasonication method with the Ni concentrations of 1, 2, and 3 mol %. The samples were characterized by high resolution scanning electron microscopy, X-ray diffraction, TEM, and UV-DRS spectroscopy. The XRD spectrum reveals that all the samples are of hexagonal wurtzite structures. The crystallite size decreases with increasing Ni concentration. The Ni concentration is determined by the energy dispersive X-ray technique. From the UV spectra, upon Ni doping the characteristic peak is red shifted which is the indication of decrease in the band gap. Magnetization measurements reveal that Ni doped ZnO shows paramagnetism with enhanced Ni concentration.

show abstract

“…The decrease in E g with increasing Ni content in ZnO is attributed to the s-d and p-d interactions giving rise to band gap kneeling, which was explained theoretically using second-order perturbation theory [35]. This attribution is due to the activation of 'spd' exchange interactions [36].…”

Section: Results and Analysismentioning

confidence: 93%

Reactive magnetron sputtering of Ni doped ZnO thin film: Investigation of optical, structural, mechanical and magnetic properties

Siddheswaran

Netrvalová

Savková

et al. 2015

Journal of Alloys and Compounds

View full text Add to dashboard Cite

Ni-doped vertically aligned zinc oxide nanorods prepared by hybrid wet chemical route

Cited by 28 publications

References 35 publications

Alignment, Morphology and Defect Control of Vertically Aligned ZnO Nanorod Array: Competition between “Surfactant” and “Stabilizer” Roles of the Amine Species and Its Photocatalytic Properties

Alignment, Morphology and Defect Control of Vertically Aligned ZnO Nanorod Array: Competition between “Surfactant” and “Stabilizer” Roles of the Amine Species and Its Photocatalytic Properties

Synthesis and Characterization of ZnO and Ni Doped ZnO

Reactive magnetron sputtering of Ni doped ZnO thin film: Investigation of optical, structural, mechanical and magnetic properties

Contact Info

Product

Resources

About