Actinomorphic ZnO microneedles decorated with SnO2 nanospheres: synthesis, characterization and optical studies

Haghighi, Soheila; Haghighatzadeh, Azadeh

doi:10.1007/s00339-020-3294-1

Cited by 6 publications

(5 citation statements)

References 49 publications

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“…TEM images of ZnO−SnO 2 nanocomposites at different magnifications are recorded and are shown in Figure 7 [19] . TEM images show that ZnO−SnO 2 nanocomposites are polycrystalline in nature with cubic in shape and particle size varies from 20 to 50 nm.…”

Section: Resultsmentioning

confidence: 99%

“…TEM images of ZnOÀ SnO 2 nanocomposites at different magnifications are recorded and are shown in Figure 7. [19] TEM images show that ZnOÀ SnO 2 nanocomposites are polycrystalline in nature with cubic in shape and particle size varies from 20 to 50 nm. Figure 7 also shows that ZnOÀ SnO 2 nanocomposite particles are agglomerated to each other and to from the cube like morphology which is match with the FESEM technique.…”

Section: Tem Study Of Znoà Sno 2 Nanocompositementioning

confidence: 99%

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Farming of ZnO−SnO₂ Nanocubes for Chemiresistive NO₂ Gas Detection

Dhage,

Patil,

Yelpale

et al. 2024

ChemistrySelect

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The ZnO−SnO2 nanocomposite has been synthesized using the simple and low‐cost co‐precipitation method. The physicochemical characterization of the prepared nanocomposites was carried out by using X‐ray diffraction (XRD), Field Emission Scanning Electron Microscope (FE‐SEM), High‐resolution Transmission Electron Microscopy (HR‐TEM), Energy Dispersive X‐ray analysis (EDAX) and UV‐visible spectroscopy techniques. In XRD confirmed that, hexagonal wurtzite phase of ZnO with the tetragonal rutile phase of SnO2 was found to be in the pure form. The particle size of the ZnO−SnO2 nanocomposite was fund to be ~23 nm in size. The nano cubes like surface morphology of the ZnO−SnO2 nanocomposite has been investigated using FESEM. Based on this various characterization, the ZnO−SnO2 nanocomposite has been used for the development of the chemiresistive gas sensor application. The gas sensitivity is found to be 29.30 % for 100 ppm NO2 gas at 200 °C operating temperature. This work has been used for the development of gas sensor devices for practical application.

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Section: Resultsmentioning

confidence: 99%

Section: Tem Study Of Znoà Sno 2 Nanocompositementioning

confidence: 99%

Farming of ZnO−SnO₂ Nanocubes for Chemiresistive NO₂ Gas Detection

Dhage,

Patil,

Yelpale

et al. 2024

ChemistrySelect

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show abstract

“…In addition, the emission of surface-localized excitons on the SnO x shell layer is also in this wavelength range [ 27 ]. The visible emissions at 425 nm and 460 nm are thought to arise from defect-related states such as oxygen vacancies generated during the formation of ZnO nanoparticles [ 50 ].…”

Section: Discussionmentioning

confidence: 99%

“…Chitosan with a molecular weight of 100-300 kDa was obtained from Acros Organics, USA. Aqueous suspensions of ZnO nanoparticles (50…”

Section: Methodsmentioning

confidence: 99%

Chitosan Nanocomposite Coatings Containing Chemically Resistant ZnO–SnOx Core–shell Nanoparticles for Photocatalytic Antifouling

Kumar

Mazinani

et al. 2021

IJMS

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Functional nanocomposites with biopolymers and zinc oxide (ZnO) nanoparticles is an emerging application of photocatalysis in antifouling coatings. The reduced chemical stability of ZnO in the acidic media in which chitosan is soluble affects the performance of chitosan nanocomposites in antifouling applications. In this study, a thin shell of amorphous tin dioxide (SnOx) was grown on the surface of ZnO to form ZnO–SnOx core–shell nanoparticles that improved the chemical stability of the photocatalyst nanoparticles, as examined at pH 3 and 6. The photocatalytic activity of ZnO–SnOx in the degradation of methylene blue (MB) dye under visible light showed a higher efficiency than that of ZnO nanoparticles due to the passivation of electronic defects. Chitosan-based antifouling coatings with varying percentages of ZnO or ZnO–SnOx nanoparticles, with or without the glutaraldehyde (GA) crosslinking of chitosan, were developed and studied. The incorporation of photocatalysts into the chitosan matrix enhanced the thermal stability of the coatings. Through a mesocosm study using running natural seawater, it was found that chitosan/ZnO–SnOx/GA coatings enabled better inhibition of bacterial growth compared to chitosan coatings alone. This study demonstrates the antifouling potential of chitosan nanocomposite coatings containing core–shell nanoparticles as an effective solution for the prevention of biofouling.

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“…For example, Baruah et al studied the effect of pH variation on the dimension and morphology of ZnO nanorods grown through hydrothermal process on pre-seeded glass substrates at temperature * 100°C [39]. The synthesis of three-dimensional nanostructures consisting of a mass of organized one-dimensional or two-dimensional building blocks have shown enhanced optoelectronic properties due to the functioning as both the building blocks as well as the interconnections [40][41][42][43][44][45]. Several investigations have demonstrated hollow ZnO microspheres assembled by onedimensional building units exhibiting unique properties such as low densities, enlarged surface areas, and shortened transport distances presenting highly efficient surface permeability [46].…”

Section: Introductionmentioning

confidence: 99%

Hollow ZnO microspheres self-assembled from rod-like nanostructures: morphology-dependent linear and Kerr-type nonlinear optical properties

Haghighatzadeh

Mazinani

Ostad

et al. 2021

J Mater Sci: Mater Electron

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Hollow nanostructures have attracted attention because of their unique physiochemical properties and broad potential applications in electronics, optics and photonics. In this study, a facile hydrothermal approach was developed to fabricate hollow ZnO microspheres via self-assembled rod-like nanostructures. The morphology-controlled synthesis was conducted by altering hydrothermal treatment temperature (150, 200 and 250 °C) in solutions containing zinc acetate dihydrate precursor and glycerol as the stabilizing agent. The morphological observations indicated that hydrothermally grown ZnO architectures could be reasonably adjusted by modulating hydrothermal reaction temperature. Possible growth routes are proposed to elucidate the formation process of ZnO microspheres with the rod-like nanostructures. Morphology-dependent absorbance and emission along with red-shifts with improved crystalline qualities were observed with increasing hydrothermal growth temperature. Kerr-type nonlinear optical characteristics examined using single-beam Z-scan technique in the near infrared spectral range under nanosecond Nd-YVO4 laser pulses showed positive values of nonlinear refraction providing an evidence of self-focusing behaviors at the excitation wavelength of 1064 nm in all the samples studied. The highest Kerr-type nonlinear susceptibility was estimated to be 2.31 × 10–6 esu for hollow ZnO microspheres grown at 250 °C, suggesting synergistic effects of surface morphologies on optical nonlinearities.

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Actinomorphic ZnO microneedles decorated with SnO2 nanospheres: synthesis, characterization and optical studies

Cited by 6 publications

References 49 publications

Farming of ZnO−SnO₂ Nanocubes for Chemiresistive NO₂ Gas Detection

Farming of ZnO−SnO₂ Nanocubes for Chemiresistive NO₂ Gas Detection

Chitosan Nanocomposite Coatings Containing Chemically Resistant ZnO–SnOx Core–shell Nanoparticles for Photocatalytic Antifouling

Hollow ZnO microspheres self-assembled from rod-like nanostructures: morphology-dependent linear and Kerr-type nonlinear optical properties

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Actinomorphic ZnO microneedles decorated with SnO2 nanospheres: synthesis, characterization and optical studies

Cited by 6 publications

References 49 publications

Farming of ZnO−SnO2 Nanocubes for Chemiresistive NO2 Gas Detection

Farming of ZnO−SnO2 Nanocubes for Chemiresistive NO2 Gas Detection

Chitosan Nanocomposite Coatings Containing Chemically Resistant ZnO–SnOx Core–shell Nanoparticles for Photocatalytic Antifouling

Hollow ZnO microspheres self-assembled from rod-like nanostructures: morphology-dependent linear and Kerr-type nonlinear optical properties

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Farming of ZnO−SnO₂ Nanocubes for Chemiresistive NO₂ Gas Detection

Farming of ZnO−SnO₂ Nanocubes for Chemiresistive NO₂ Gas Detection