Y-doped ZnO nanosheets: Gigantic piezoelectric response for an ultra-sensitive flexible piezoelectric nanogenerator

Sinha, Nidhi; Goel, Sahil; Joseph, Abhilash J.; Yadav, Harsh; Batra, Kriti; Gupta, Manoj; Kumar, Binay

doi:10.1016/j.ceramint.2018.02.066

Cited by 95 publications

(31 citation statements)

References 40 publications

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“…Additionally, yttrium (Y, considered both an RE and TM element) was successfully included into the crystal lattice of ZnO nanosheets obtained by a co-precipitation method that involved the use of zinc chloride and yttrium (III) chloride hexahydrate. As reported by Sinha et al, a huge increase of the piezoelectric coefficient d 33 (up to 420 pm/V against 12.4 pm/V of pure ZnO) in Y-doped nanosheets was measured [ 160 ]. The XRD pattern of the Y-doped and undoped ZnO nanosheets revealed a shift toward higher angles of the peaks in the case of the doped material, evidencing a change in the lattice spacing among atoms.…”

Section: Synthesis Methods and Characterizationmentioning

confidence: 81%

“…Among the zinc precursors, the main used are zinc acetate [ 156 , 157 ], zinc nitrate [ 158 , 159 ] and zinc chloride [ 150 , 160 , 161 ], which readily dissolve in most of the solvents used in this kind of reaction (water [ 152 , 162 ], ethanol [ 163 ] and methanol [ 164 ]). For the dopant precursor, chlorides [ 138 ], nitrates [ 165 , 166 ] and acetates [ 144 ] from the corresponding dopant elements are the typical choices.…”

Section: Synthesis Methods and Characterizationmentioning

confidence: 99%

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Doped Zinc Oxide Nanoparticles: Synthesis, Characterization and Potential Use in Nanomedicine

et al. 2020

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Smart nanoparticles for medical applications have gathered considerable attention due to an improved biocompatibility and multifunctional properties useful in several applications, including advanced drug delivery systems, nanotheranostics and in vivo imaging. Among nanomaterials, zinc oxide nanoparticles (ZnO NPs) were deeply investigated due to their peculiar physical and chemical properties. The large surface to volume ratio, coupled with a reduced size, antimicrobial activity, photocatalytic and semiconducting properties, allowed the use of ZnO NPs as anticancer drugs in new generation physical therapies, nanoantibiotics and osteoinductive agents for bone tissue regeneration. However, ZnO NPs also show a limited stability in biological environments and unpredictable cytotoxic effects thereof. To overcome the abovementioned limitations and further extend the use of ZnO NPs in nanomedicine, doping seems to represent a promising solution. This review covers the main achievements in the use of doped ZnO NPs for nanomedicine applications. Sol-gel, as well as hydrothermal and combustion methods are largely employed to prepare ZnO NPs doped with rare earth and transition metal elements. For both dopant typologies, biomedical applications were demonstrated, such as enhanced antimicrobial activities and contrast imaging properties, along with an improved biocompatibility and stability of the colloidal ZnO NPs in biological media. The obtained results confirm that the doping of ZnO NPs represents a valuable tool to improve the corresponding biomedical properties with respect to the undoped counterpart, and also suggest that a new application of ZnO NPs in nanomedicine can be envisioned.

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Section: Synthesis Methods and Characterizationmentioning

confidence: 81%

Section: Synthesis Methods and Characterizationmentioning

confidence: 99%

Doped Zinc Oxide Nanoparticles: Synthesis, Characterization and Potential Use in Nanomedicine

et al. 2020

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“…Li et al [46] reported that Y-doping into ZnO improves its gas sensing property. The gigantic piezoelectric response of Y-doped ZnO nanosheets prepared by wet chemical co-precipitation method was reported by Sinha et al [47].…”

Section: Introductionmentioning

confidence: 74%

Y Katkılı Piramit ZnO Tozlarının Sentez ve Karakterizasyonu

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et al. 2020

Düzce Üniversitesi Bilim Ve Teknoloji Dergisi

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The present study focuses on the structural changes in ZnO powder induced by doping of a rare earth metal of Y. For this aim, we synthesized four ZnO samples with different Y-content using the combustion reaction method. X-ray powder diffraction (XRPD) technique and scanning electron microscopy (SEM) results confirm that the asinvestigated structural parameters and morphology of the ZnO structure were affected directly by the concentration of Y dopant. For each Y-doped sample, randomly-oriented pyramidal morphology and the formation of a minority phase of Y2O3 were observed. A gradual increase in both lattice parameters and unit cell volume was detected with increasing Y content. All samples were found to be thermally stable in the temperature interval of 25-950 °C.

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“…The piezo-enhanced photo-induced degradation mechanism can be schematized as in Figure 1 : UV photons promote the electrons in the ZnO conduction band and an equal number of holes in the valence band ( Figure 9 A). The deformation of the ZnO crystal induces the formation of an electric field with the negative pole on the compressed face (in red in Figure 9 B) and the positive one on the opposite face (in red in Figure 9 B) [ 56 ]. The electrons will be more efficiently separated by the presence of the external electric field, reducing the charges’ recombination.…”

Section: Discussionmentioning

confidence: 99%

“…The sample B response is 40% lower than the bias recorded for the sample A, and the intensity of the recorded voltages decreases down to −0.055 V and −0.045 V for the samples C and D, respectively. A possible rationale to justify the observed differences is that two different morphologies can be identified in the synthetized samples [56]. Elongated structures can be identified in the sample A (hexagonal rod of ZnO); as is known, a charge separation is generated with an accumulation of the positive charges on the Zn-terminated plane and negative ones on the O-terminated crystalline plane along the c-axis [57].…”

Section: Piezoelectric and Piezo-photocatalytic Responses Of The Zno mentioning

confidence: 99%

Wet Synthesis of Elongated Hexagonal ZnO Microstructures for Applications as Photo-Piezoelectric Catalysts

et al. 2020

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It is well known that energetic demand and environmental pollution are strictly connected; the side products of vehicle and industrial exhausts are considered extremely dangerous for both human and environmental health. In the last years, the possibility to simultaneously photo-degrade water dissolved pollutants by means of ZnO nanostructures and to use their piezoelectric features to enhance the photo-degradation process has been investigated. In the present contribution, an easy and low-cost wet approach to synthetize hexagonal elongated ZnO microstructures in the wurtzite phase was developed. ZnO performances as photo-catalysts, under UV-light irradiation, were confirmed on water dissolved methylene blue dye. Piezoelectric responses of the synthetized ZnO microstructures were evaluated, as well, by depositing them into films onto flexible substrates, and a home-made layout was developed, in order to stimulate the ZnO microstructures deposited on solid supports by means of mechanical stress and UV photons, simultaneously. A relevant increment of the photo-degradation efficiency was observed when the piezopotential was applied, proposing the present approach as a completely eco-friendly tool, able to use renewable energy sources to degrade water solved pollutants.

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Y-doped ZnO nanosheets: Gigantic piezoelectric response for an ultra-sensitive flexible piezoelectric nanogenerator

Cited by 95 publications

References 40 publications

Doped Zinc Oxide Nanoparticles: Synthesis, Characterization and Potential Use in Nanomedicine

Doped Zinc Oxide Nanoparticles: Synthesis, Characterization and Potential Use in Nanomedicine

Y Katkılı Piramit ZnO Tozlarının Sentez ve Karakterizasyonu

Wet Synthesis of Elongated Hexagonal ZnO Microstructures for Applications as Photo-Piezoelectric Catalysts

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