The seeding effect on the microstructure and photocatalytic properties of ZnO nano powders

Asl, Shahin Khameneh; Sadrnezhaad, S.K.; Rad, M. Kianpour

doi:10.1016/j.matlet.2010.06.043

Cited by 23 publications

(7 citation statements)

References 14 publications

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“…Many properties of nanoparticles, such as surface and interface effects, 1 quantum size effect, 2 photocatalytic properties, 3 and phonon properties, 4 have been investigated. In humans, environmental exposure to nano-ZnO has shown that it stayed in the stratum corneum and accumulated in skin folds and/or hair follicle roots of the skin.…”

Section: Introductionmentioning

confidence: 99%

Nano-zinc oxide damages spatial cognition capability via over-enhanced long-term potentiation in hippocamus of Wistar rats

Han¹,

Tian²,

Zhang³

et al. 2011

IJN

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This study focused on the effects of zinc oxide nanoparticles (nano-ZnO) on spatial learning and memory and synaptic plasticity in the hippocampus of young rats, and tried to interpret the underlying mechanism. Rats were randomly divided into four groups. Nano-ZnO and phosphate-buffered saline were administered in 4-week-old rats for 8 weeks. Subsequently, performance in Morris water maze (MWM) was determined, and then long-term potentiation (LTP) and depotentiation were measured in the perforant pathway to dentate gyrus (DG) in anesthetized rats. The data showed that, (1) in MWM, the escape latency was prolonged in the nano-ZnO group and, (2) LTP was significantly enhanced in the nano-ZnO group, while depotentiation was barely influenced in the DG region of the nano-ZnO group. This bidirectional effect on long-term synaptic plasticity broke the balance between stability and flexibility of cognition. The spatial learning and memory ability was attenuated by the alteration of synaptic plasticity in nano-ZnO-treated rats.

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Section: Introductionmentioning

confidence: 99%

Nano-zinc oxide damages spatial cognition capability via over-enhanced long-term potentiation in hippocamus of Wistar rats

Han¹,

Tian²,

Zhang³

et al. 2011

IJN

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“…As this process could distort the membrane structure, characterization tools that enable us to study the structure (ordering) of the membrane also provide information about the influence of NPs on the membranes. ZnO and TiO 2 nanoparticles and their interaction with biological objects were investigated by several authors using different methods [6][7][8][9][10], however the mechanism of NP interaction with membrane is still an open question. Supercritical Angle Fluorescence Microscopy (SAF) is a technique that allows detection and characterisation of fluorescent species (proteins, biomolecules, pharmaceuticals, etc.)…”

Section: Introductionmentioning

confidence: 99%

Effect of Zinc Oxide and Titanium Dioxide Nanoparticles on Supported Lipid Bilayers

Grinceviciute¹,

Verdes²,

Snitka³

2015

JNMR

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Nanoparticles (NP) are broadly exploited in biomedical sciences in order to develop various methods of targeted drug delivery, novel biosensors and new therapeutic pathways. However, relatively little is known in the negotiation of NPs with complex biological environments. NP interaction with cell membranes can damage the cell membrane and cause toxicity; therefore, examining interactions between NPs and cell membranes is crucial to understanding NP toxicity mechanisms and the development of safe and non-toxic NP-based commercial and therapeutic applications. To gain a physical understanding of NP-membrane interactions, we used a simplified system built of well-defined synthetic lipid bilayers and NP. The interaction of nanoparticles (NPs) with supported lipid bilayers (SLB) can lead to structural modification of the SLB and affect the structure and dynamic of lipids. In this work TiO 2 and ZnO nanoparticles were chosen because of wide applications and usage in industry of papers, inks, medicines, food products, cosmetics, toothpastes and skin care products and among others. Therefore, a better understanding of the interactions between NP and lipid membrane may help to better clarify the potential risk of NPs. The interaction between ZnO and TiO 2 NPs and lipid membranes was studied by using scanning supercritical angle fluorescence microscopy. The biological response to elucidated changes in lipid membrane structure/characteristics under ZnO or TiO 2 NP influence was tested by fluorescence correlation spectroscopy. It was found the significant reduction of lipids diffusion mobility, which can be explained as a result of lipid-ZnO aggregates binding, depending on ZnO concentration. The TiO 2 has a little effect on lipids diffusion mobility.

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“…In the recent years, the use of nano-structured ZnO [38], nano-sulfated zirconia [39], nano-γ-alumina [40], and nano-ZSM-5 zeolite [41], catalysts has received considerable interest in organic synthesis. This extensive application of heterogeneous catalysts in synthetic organic chemistry can make the synthetic process more efficient from both environmental and economic point of view [42] and used-catalyst can be easily recycled.…”

Section: Introductionmentioning

confidence: 99%

A simple and efficient approach for synthesis of 1,4-dihydro-pyridines using nano-crystalline solid acid catalyst

Teimouri

Ghorbanian²,

Moatari³

2013

Bull. Chem. Soc. Eth.

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ABSTRACT. A simple highly versatile and efficient synthesis of various 1,4-dihydropyridines in the condensation of aromatic aldehydes with β-dicarbonyl compounds and ammonium acetate in the presence of nano-sulfated zirconia, nano-structured ZnO, nano-γ-alumina and nano-ZSM-5 zeolites, as catalyst in the ethanol at moderate temperature is presented. The advantages of method are short reaction times and milder conditions and easy work-up. The catalysts can be recovered for the subsequent reactions and reused without any appreciable loss of efficiency.

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The seeding effect on the microstructure and photocatalytic properties of ZnO nano powders

Cited by 23 publications

References 14 publications

Nano-zinc oxide damages spatial cognition capability via over-enhanced long-term potentiation in hippocamus of Wistar rats

Nano-zinc oxide damages spatial cognition capability via over-enhanced long-term potentiation in hippocamus of Wistar rats

Effect of Zinc Oxide and Titanium Dioxide Nanoparticles on Supported Lipid Bilayers

A simple and efficient approach for synthesis of 1,4-dihydro-pyridines using nano-crystalline solid acid catalyst

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