Wettability of zinc oxide nanorod surfaces

Ghannam, Hajar; Chahboun, A.; Turmine, Mireille

doi:10.1039/c9ra05378f

Cited by 37 publications

(35 citation statements)

References 39 publications

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“…6a) is obtained, annealing of the deposit at 200 ° C gives a contact angle value of 100 °(Fig. 6b), a value greater than 90, which con rms the hydrophobicity of the ZnO surface [29].It is known that DI is a very polar medium with a very high surface energy, which could indicates that the zinc oxide surface is nonpolar with a very low surface energy leading to the formation of the beads in contact with the surface of ZnO (Fig. 6).…”

Section: ………………………… (2)mentioning

confidence: 76%

Effect of Annealing Temperature on Structural and, Morphological Properties of Zno Thins Films

Debbab¹,

Ghellai²,

Belaoui³

et al. 2021

Preprint

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In this work, thins films of zinc oxide were deposited on n-type silicon substrates by chemical electrodeposition. The effect of annealing temperature from 200 ° C to 600 ° C, with a step of 100 ° C, on the structural and morphological properties of ZnO layers has been studied. Scanning electron microscopy (SEM), X-ray diffraction (XRD) and contact angle measurements were used to characterize the morphology and structure of ZnO without and with annealing. The XRD patterns of unannealed ZnO thins films indicate the presence of three intense peaks along (100), (002) and (101) planes, while for the annealed ZnO layers the XRD patterns show also the three major peaks but the intensity of these peaks is increased except for a temperature of 600 ° C where is decreased. The comparison of the XRD patterns of the ZnO layers without and with annealing, reveal a shift in the 2θ diffraction angle, the calculation of the crystallinity confirms the obtained results. The contact angle measurements indicate that the ZnO layers without and with annealing at 200 °C are hydrophobic, the surface of the ZnO layer becomes hydrophilic at annealing temperatures exceeding 300 ° C. Finally, SEM images show the change in structure from a sand rose shape to a granular structure, confirming the XRD and contact angle results.

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Section: ………………………… (2)mentioning

confidence: 76%

Effect of Annealing Temperature on Structural and, Morphological Properties of Zno Thins Films

Debbab¹,

Ghellai²,

Belaoui³

et al. 2021

Preprint

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“…The contact angle evolution on ZnO NW surfaces (93, 102, 111, and 156 , for example 1000 s, 3000 s, 5000 s, and 7000 s, respectively) agree with the different phenomena of liquid penetration observed on hydrophobic surfaces. 38 Characterization of ZnO surfaces is achieved by working in the absence of faradic reactions and in conditions of ideal polarizability. The effect of ZnO morphology on capacity performance is elucidated using CV measurements.…”

Section: Resultsmentioning

confidence: 99%

“…The conditions of mSs electrodeposition used in this work were reported for the rst time by Ghannam et al 38 For these conditions, the mSs growth is considered much faster than the others previously used. [43][44][45] Indeed, mSs are the result of adsorption of Cl À ionsprovided both from ZnCl 2 and KClon polar facets of ZnO enhancing the natural growth along the (0002) plane.…”

Section: Resultsmentioning

confidence: 99%

Effect of ZnO surface morphology on its electrochemical performance

2021

Self Cite

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“…The electrodeposition of zinc has been widely investigated with extensive commercial application for the protection of steel against corrosion. [1] Traditionally, the direct current (DC) method of electroplating has been explored in terms of varying current density to obtain changes in morphology, grain size, preferred crystalline orientation, which in turn have significant consequences for properties such as corrosion resistance, [2] hardness, [3] ductility, contact angle, [4] contact resistance, [5] and porosity. [6] More recent efforts have also included the use of pulsed waveforms to achieve several of the same effects in grain size, morphology, and crystalline orientation.…”

Section: Introductionmentioning

confidence: 99%

Control of Texture and Morphology of Zinc Films through Pulsed Methods from Additive‐Free Electrolytes

Fuller

Martin

et al. 2021

ChemistrySelect

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We investigate the electrodeposition of zinc on steel substrates using pulsed methods from additive-free electrolytes in an industrially scalable parallel plate flow cell. We demonstrate that variables such as peak current and duty cycle can be used to independently control the morphology and preferential texture of the crystalline structure, which is, in turn, desirable for a variety of applications. Specifically, we have observed a transition of the preferential (002) facets at low peak current density (or low duty cycle) to ( 101) preferring facets at higher peak current density (or high duty cycle) as determined by the analysis of texture coefficients. Further analysis using scanning electron microscopy reveals a transition from the conventional hexagonal-shaped particles of zinc to needle-shaped structures, accompanied by a change in average crystallite size from 33 to 19 nanometers, determined from X-ray diffraction studies. The variation in morphology is also correlated to crystallographic textures through the analysis of texture coefficients and an understanding of crystallization mechanisms occurring during deposition. Collectively, these results demonstrate that the morphology and crystalline orientation of zinc can be easily manipulated through tuning of the pulse parameters without the use of complex and expensive additives that have been traditionally used to achieve similar effects.

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Wettability of zinc oxide nanorod surfaces

Abstract: We have studied the wettability of zinc oxide (ZnO) nanorods grown on fluorine-doped tin oxide (FTO) by highlighting the effect of polar and non-polar ZnO facets on contact angle (CA) results.

Cited by 37 publications

References 39 publications

Effect of Annealing Temperature on Structural and, Morphological Properties of Zno Thins Films

Effect of Annealing Temperature on Structural and, Morphological Properties of Zno Thins Films

Effect of ZnO surface morphology on its electrochemical performance

Control of Texture and Morphology of Zinc Films through Pulsed Methods from Additive‐Free Electrolytes

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