Nonstoichiometric properties of zinc oxide nanoparticles prepared by decomposition of zinc peroxide

Uekawa, Naofumi; Mochizuki, Naoto; Kajiwara, Jyunichi; Mori, Fumihiko; Wu, Yong; Kakegawa, Kazuyuki

doi:10.1039/b210990e

Cited by 76 publications

(75 citation statements)

References 14 publications

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“…Hydrogen peroxide is also known as an oxidizing agent of zinc oxide and zinc hydroxide [22,52,56]. On the other hand, the ultraviolet illumination of ZnO is also known to lead to the photolysis of the ZnO lattice whereby oxygen gas is released leaving behind very active oxygen vacancy surface defect sites [14,55].…”

Section: Homentioning

confidence: 99%

ZnO films grown by pulsed-laser deposition on soda lime glass substrates for the ultraviolet inactivation of Staphylococcus epidermidis biofilms

Mosnier

O’Haire

McGlynn

et al. 2009

Science and Technology of Advanced Materials

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We found that a ZnO film of 2 µm thickness which was laser-deposited at room temperature onto a plain soda lime glass substrate, exhibits notable antibacterial activity against a biofilm of Staphylococcus epidermidis when back-illuminated by a UVA light source with a peak emission wavelength of about 365 nm. X-ray diffraction (XRD), scanning electron microscopy (SEM), atomic force microscopy (AFM), UV-visible absorption spectroscopy, Raman spectroscopy and x-ray photoemission spectroscopy (XPS) were used to characterize the ZnO films before and after the interactions with the biofilm and the ultraviolet light, respectively. The as-deposited film was highly textured with the wurtzite (0002) in-plane orientation (c-axis perpendicular to ZnO surface) and had a surface rms roughness of 49.7 nm. In the as-deposited film, the Zn to O ratio was 1 to 0.95. After the UV and biofilm treatments, the ZnO film surface had become rougher (rms roughness 68.1 nm) and presented uniform micron-sized pitting randomly distributed, while the zinc to oxygen ratio had become 1 to 2.2. In this case, both the UV-visible and Raman spectra pointed to degradation of the structural quality of the material. On the strength of these data, we propose a model for the mediation of the bactericidal activity in which the photogeneration of highly oxidizing species and the presence of active surface defect sites both play an important role. This study is of particular interest for the acute problem of disinfection of pathogenic biofilms which form on medical device/implant surfaces.

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Section: Homentioning

confidence: 99%

ZnO films grown by pulsed-laser deposition on soda lime glass substrates for the ultraviolet inactivation of Staphylococcus epidermidis biofilms

Mosnier

O’Haire

McGlynn

et al. 2009

Science and Technology of Advanced Materials

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“…8 Nanoparticles of zinc peroxide can additionally be used as precursors for preparation of ZnO nanoparticles. 9,10 Here we report results for ZnO 2 nanoparticles, prepared by a chemical method. Structural stability of ZnO 2 nanoparticles were studied at temperatures up to 800°C and pressures up to 36 GPa together with optical and magnetic properties measurements and first-principles calculations.…”

Section: Introductionmentioning

confidence: 99%

Synthesis, Thermal Stability and Properties of ZnO₂ Nanoparticles

Chen

Wang

et al. 2009

J. Phys. Chem. C

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ZnO 2 nanoparticles have been synthesized by an organometallic precursor method. The structure, structural stability, and magnetic and optical properties of ZnO 2 nanoparticles have been investigated by experiments and first-principles calculations. It is found that ZnO 2 nanoparticles decompose into ZnO at about 230°C and is stable up to 36 GPa at ambient temperature. The cubic ZnO 2 phase has a bulk modulus of B 0 ) 174 GPa at zero pressure. Nanocrystalline ZnO 2 material is an indirect semiconductor with an energy gap of about 4.5 eV and paramagnetic down to 5 K.

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“…9 ZnO 2 NPs can additionally be used as precursors to prepare ZnO NPs. 10,11 ZnO 2 is an odorless white stable solid at ambient temperature, but it is decomposed by heating at 150°C to release oxygen. 12 New methods of preparing ZnO 2 powder use an aqueous system with various zinc salts.…”

Section: Introductionmentioning

confidence: 99%

Preparation of ZnO₂Nanoparticles Using Organometallic Zinc(II) Isobutylcarbamate in Organic Solvent

Kim¹,

Cha²,

Gong³

et al. 2014

Bulletin of the Korean Chemical Society

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Zinc peroxide nanoparticles (ZnO 2 NPs) were prepared by reacting zinc(II) isobutylcarbamate, as an organometallic precursor, with hydrogen peroxide (H 2 O 2 ) at 60°C. Polyethylene glycol and polyvinylpyrrolidone were used as stabilizers, which suppressed aggregation of the ZnO 2 NPs. Conditions such as concentrations of H 2 O 2 and the stabilizer were systemically controlled to determine their effect on the formation of nano-sized ZnO 2 NPs. The formation of stable ZnO 2 NPs was confirmed by UV-vis, Raman spectroscopy, X-ray photoelectron spectroscopy, transmission electron microscopy (TEM), scanning electron microscopy (SEM), and X-ray diffraction. The TEM images revealed that polyvinylpyrrolidone-stabilized ZnO 2 NPs (diameter, 10-30 nm) were well dispersed in the organic solvent. Quite pure ZnO NPs were obtained from the peroxide powder by simple heat treatment of ZnO 2 . The transition temperature of 170 o C was determined by differential scanning calorimetry.

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Nonstoichiometric properties of zinc oxide nanoparticles prepared by decomposition of zinc peroxide

Cited by 76 publications

References 14 publications

ZnO films grown by pulsed-laser deposition on soda lime glass substrates for the ultraviolet inactivation of Staphylococcus epidermidis biofilms

ZnO films grown by pulsed-laser deposition on soda lime glass substrates for the ultraviolet inactivation of Staphylococcus epidermidis biofilms

Synthesis, Thermal Stability and Properties of ZnO₂ Nanoparticles

Preparation of ZnO₂Nanoparticles Using Organometallic Zinc(II) Isobutylcarbamate in Organic Solvent

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Nonstoichiometric properties of zinc oxide nanoparticles prepared by decomposition of zinc peroxide

Cited by 76 publications

References 14 publications

ZnO films grown by pulsed-laser deposition on soda lime glass substrates for the ultraviolet inactivation of Staphylococcus epidermidis biofilms

ZnO films grown by pulsed-laser deposition on soda lime glass substrates for the ultraviolet inactivation of Staphylococcus epidermidis biofilms

Synthesis, Thermal Stability and Properties of ZnO2 Nanoparticles

Preparation of ZnO2Nanoparticles Using Organometallic Zinc(II) Isobutylcarbamate in Organic Solvent

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Synthesis, Thermal Stability and Properties of ZnO₂ Nanoparticles

Preparation of ZnO₂Nanoparticles Using Organometallic Zinc(II) Isobutylcarbamate in Organic Solvent