The investigation of the parameters affecting the ZnO nanoparticle cytotoxicity behaviour: a tutorial review

Both n-channel and p-channel thin-film transistors have been realized on ZnO nanoparticle (NP) layers sprayed onto quartz substrates. In this study, nitrogen-doped ZnO-NPs were synthesized using an arc-discharge-mediated gas-evaporation method that was recently developed. Sprayed NP layers were characterized by scanning electron microscopy and Hall effect measurements. It was confirmed that p-type behaving NP layers can be obtained using ZnO-NPs synthesized with lower chamber pressure, whereas n-type conductivity can be obtained with higher chamber pressure. pn-junction diodes were also tested, resulting in clear rectifying characteristics. The possibility of particle-process-based ZnO-NP electronics was confirmed.

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Fabrication of Highly Hydrophobic Polyurethane Foam for the Oil-Absorption Application

Materials Science Forum ◽

10.4028/www.scientific.net/msf.809-810.169 ◽

2014 ◽

Vol 809-810 ◽

pp. 169-174 ◽

Cited By ~ 3

Author(s):

Jun Liu ◽

Meng Jie Chang ◽

Menken Tenggeer ◽

Hui Ling Du

Keyword(s):

Absorption Capacity ◽

Future Application ◽

Organic Liquids ◽

Zno Nanoparticle ◽

Oil Absorption ◽

Zno Nanorod ◽

Acid Modification ◽

Zno Nps ◽

Oil Absorbent ◽

Highly Hydrophobic

Hydrophobic polyurethane (PU) sponge for oil absorption application was fabricated by ZnO nanomaterial coating and stearic acid modification on ZnO surface. The contact angle and oil absorbent capacity ability of the obtained sponge were measured. It was demonstrated that both ZnO nanoparticle and ZnO nanorod coated PU sponge (ZnO NPs-PU and ZnO NRs-PU) showed good hydrophobicity and oil absorbent ability. ZnO NPs-PU and ZnO NRs-PU sponges have absorbent capacities of 18~92 times and 20~98 times of their own weight for different organic liquids, respectively. Moreover, the absorption capacity of the ZnO NRs-PU sponge did not deteriorate over 50 cycles. Therefore, the ZnO NRs-PU sponge has excellent recyclability for future application.

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Effect of silver doping on structural and photocatalytic circumstances of ZnO nanoparticles

Iraqi Journal of Nanotechnology ◽

10.47758/ijn.vi1.22 ◽

2020 ◽

pp. 13-20

Author(s):

Luma Ahmed ◽

Eitemad S. Fadhil ◽

Ayad F. Mohammed

Keyword(s):

Zno Nanoparticles ◽

Precipitation Method ◽

Methyl Green ◽

Zno Nanoparticle ◽

Zno Nps ◽

Force Microscopy ◽

Ft Ir ◽

Doped Zno ◽

Co Precipitation ◽

Artificial Uv

This article describes the synthesis of ZnO nanoparticles (Nps) using the co-precipitation method and then calcinated at 500oC for 2 h. The photo activity of ZnO nanoparticles was examined in photo decolorization of methyl green dye under artificial UV -A light. This prepared photocatalyst (ZnO Np) was modified his surface by 2% Ag doped using the photo deposition method under inert gas for 3h. The characterization of undoped and 2% Ag doped ZnO Nps were estimated by Fourier-transform infrared spectroscopy (FT-IR), X-ray Diffraction (XRD), and Atomic force microscopy (AFM). In FT-IR analysis, the new peaks occurred around 624-778 cm-1 confirmed the Ag really is doped on prepared ZnO Np. Based on data from XRD, the mean crystal size was reduced with doped the 2% Ag. The AFM images for the prepared photocatalysts ensure that the shapes of all samples are semi-spherical with nanometer size. Series of kinetics experiments were performed for the photocatalytic decolourization of methyl green dye using undoped and 2% Ag doped ZnO nanoparticle and found to be pseudo-first-order kinetics.

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Effects of Ambience on Thermal-Diffusion Type Ga-doping Process for ZnO Nanoparticles

Coatings ◽

10.3390/coatings12010057 ◽

2022 ◽

Vol 12 (1) ◽

pp. 57

Author(s):

Md Maruful Islam ◽

Toshiyuki Yoshida ◽

Yasuhisa Fujita

Keyword(s):

Sheet Resistance ◽

Thermal Diffusion ◽

Arc Discharge ◽

Atmospheric Effects ◽

Zno Nanoparticle ◽

Zno Nps ◽

Diffusion Type ◽

Transistor Channel ◽

Doped Zno ◽

Ga Doping

Various annealing atmospheres were employed during our unique thermal-diffusion type Ga-doping process to investigate the surface, structural, optical, and electrical properties of Ga-doped zinc oxide (ZnO) nanoparticle (NP) layers. ZnO NPs were synthesized using an arc-discharge-mediated gas evaporation method, followed by Ga-doping under open-air, N2, O2, wet, and dry air atmospheric conditions at 800 °C to obtain the low resistive spray-coated NP layers. The I–V results revealed that the Ga-doped ZnO NP layer successfully reduced the sheet resistance in the open air (8.0 × 102 Ω/sq) and wet air atmosphere (8.8 × 102 Ω/sq) compared with un-doped ZnO (4.6 × 106 Ω/sq). Humidity plays a key role in the successful improvement of sheet resistance during Ga-doping. X-ray diffraction patterns demonstrated hexagonal wurtzite structures with increased crystallite sizes of 103 nm and 88 nm after doping in open air and wet air atmospheres, respectively. The red-shift of UV intensity indicates successful Ga-doping, and the atmospheric effects were confirmed through the analysis of the defect spectrum. Improved electrical conductivity was also confirmed using the thin-film-transistor-based structure. The current controllability by applying the gate electric-field was also confirmed, indicating the possibility of transistor channel application using the obtained ZnO NP layers.

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Synthesis of ZnO Nanoparticle and its Application in Catalytic Hydrolysis of p-Acetoxynitrobenzene

International Journal of Nanoscience ◽

10.1142/s0219581x17500053 ◽

2017 ◽

Vol 16 (04) ◽

pp. 1750005 ◽

Cited By ~ 1

Author(s):

Avnish Kumar Arora ◽

Pankaj Kumar ◽

Sanjeev Kumar

Keyword(s):

Aqueous Phase ◽

Magnetic Measurements ◽

Low Cost ◽

Bet Surface Area ◽

Precipitation Method ◽

Effect Of Temperature ◽

Zno Nanoparticle ◽

Catalytic Hydrolysis ◽

Zno Nps ◽

Hydrolysis Of

Synthesis of ZnO nanoparticle and the hydrolysis of p-Acetoxynitrobenzene to p-Nitrophenol (p-NP) under aqueous phase conditions in the presence of ZnO nanoparticle has been carried out. Zinc oxide (ZnO) nanoparticles (NPs) are prepared by using simple precipitation method. Ammonia is used as a precipitating agent and ZnCl[Formula: see text]H2O as a starting material. The obtained ZnO NPs are characterized by using different techniques namely XRD, TGA/DTA, TEM, FT-IR, magnetic measurements and BET surface area analysis. ZnO NPs are evaluated for their catalytic properties in hydrolysis of p-Acetoxynitrobenzene to p-Nitrophenol (p-NP) under aqueous phase conditions. The effect of temperature and concentration has also been studied for the catalytic hydrolysis. This is to emphasize that the method used to synthesize these NPs is much simple and fiscal. The obtained ZnO NPs work as a good catalyst for the above conversion and are of low cost and easy to synthesize.

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Femtosecond Laser-Assisted Synthesis of ZnO Nanoparticles in Solvent with Visible Emission for Temperature Sensing

NANO ◽

10.1142/s1793292019500541 ◽

2019 ◽

Vol 14 (05) ◽

pp. 1950054 ◽

Cited By ~ 1

Author(s):

Huanhuan Xu ◽

Lihe Yan ◽

Jinhai Si ◽

Yanmin Xu ◽

Xun Hou

Keyword(s):

Femtosecond Laser ◽

Zno Nanoparticles ◽

Visible Region ◽

Femtosecond Laser Ablation ◽

Temperature Sensing ◽

Water Soluble ◽

Zno Nanoparticle ◽

Zno Nps ◽

Linear Temperature ◽

Methyl Pyrrolidone

Zinc oxide (ZnO) nanoparticles (NPs) are synthesized by one-step femtosecond laser ablation of zinc powders in n-methyl pyrrolidone (NMP) at room temperature. The as-prepared ZnO NPs are fairly stable, water-soluble and have abundant surface functional groups resulting in a strong fluorescence in the visible region. By further annealing the ZnO NPs in the reacting solvent up to 120∘C, the photoluminescence (PL) intensity of material can be significantly enhanced. Besides, the PL of ZnO NPs can change from blue to green by controlling the annealing temperature. The products exhibit excellent temperature sensing with high temperature sensitivity and a 1.3% change per ∘C response over a linear temperature sensing range (6–84[Formula: see text] in aqueous buffer, which matches well with the physiologically relevant temperatures. Hence, the ZnO nanoparticle system can serve as a promising candidate for practical fluorescent temperatures nanosensors which can be used for accurate temperature monitoring within biological systems.

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Green Synthesis, Characterization and Antimicrobial Activity of Zinc Oxide Nanoparticles on Clinical Isolates of Streptococcus pyogenes

Asian Journal of Chemistry ◽

10.14233/ajchem.2020.22495 ◽

2020 ◽

Vol 32 (4) ◽

pp. 907-911

Author(s):

S. Akash ◽

N. Ahalya ◽

P. Dhamodhar

Keyword(s):

Zinc Oxide ◽

Band Gap ◽

Streptococcus Pyogenes ◽

Zinc Oxide Nanoparticles ◽

Hexagonal Phase ◽

Combustion Method ◽

Oxide Nanoparticles ◽

Zno Nanoparticle ◽

Zno Nps ◽

X Ray

Zinc oxide nanoparticles were synthesized using epicarp of Punica granatum by combustion method at moderate temperatures. Zinc oxide nanoparticles obtained in agglomerate form were characterized by powder X-ray diffractometer (PXRD) and found to have hexagonal phase, wurtzite structure. The crystalline size of nanoparticle was found to be ~ 60 nm by using Debye-Scherrer formula. The morphology Index, Lorentz factor and Lorentz polarization factor were also calculated. Ultraviolet-visible spectroscopy (UV-vis) spectrum for ZnO nanoparticle showed a strong absorbance at 374 nm. This corresponds to the calculated band gap energy of 3.48 eV and the particle size calculated using band gap was found to be 50 nm. The Fourier Transform Infrared Spectroscopy (FTIR) spectrum showed a peak at 499 cm-1, which indicated Zn-O stretch bond. The scanning electron microscopy (SEM) analysis proved the size of nanoparticles synthesized were around 50 nm and energy dispersive X-ray spectroscopy (EDS) revealed the elemental composition of zinc oxide nanoparticles. The ZnO-NPs were evaluated for antibacterial activity against gram positive, tonsillitis causing Streptococcus pyogenes. From the present study, it was concluded that zinc oxide nanoparticles synthesized by combustion method could be valuable and economic in the field of nanotechnology.

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Investigation of ZnO-decorated CNTs for UV Light Detection Applications

Nanomaterials ◽

10.3390/nano9081099 ◽

2019 ◽

Vol 9 (8) ◽

pp. 1099 ◽

Cited By ~ 10

Author(s):

Boscarino ◽

Filice ◽

Sciuto ◽

Libertino ◽

Scuderi ◽

...

Keyword(s):

Strong Interaction ◽

Large Scale ◽

Room Temperature ◽

Low Voltage ◽

Uv Light ◽

Electrical Response ◽

Dense Layer ◽

Zno Nanoparticle ◽

Zno Nps ◽

Operational Conditions

Multi-walled carbon nanotubes (CNTs) decorated with zinc oxide nanoparticles (ZnO NPs) were prepared in isopropanol solution by a simple, room-temperature process and characterized from structural, morphological, electronic, and optical points of view. A strong interaction between ZnO and CNTs is fully confirmed by all the characterization techniques. ZnO-CNTs nanocomposites, with different weight ratios, were deposited as a dense layer between two electrodes, in order to investigate the electrical behaviour. In particular, the electrical response of the nanocomposite layers to UV light irradiation was recorded for a fixed voltage: As the device is exposed to the UV lamp, a sharp current drop takes place and then an increase is observed as the irradiation is stopped. The effect can be explained by adsorption and desorption phenomena taking place on the ZnO nanoparticle surface under irradiation and by charge transfer between ZnO and CNTs, thanks to the strong interaction between the two nanomaterials. The nanocomposite material shows good sensitivity and fast response to UV irradiation. Room temperature and low-cost processes used for the device preparation combined with room temperature and low voltage operational conditions make this methodology very promising for large scale UV detectors applications.

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Effect of ZnO Nanoparticle Content on the Structural and Ionic Transport Parameters of Polyvinyl Alcohol Based Proton-Conducting Polymer Electrolyte Membranes

Membranes ◽

10.3390/membranes11030163 ◽

2021 ◽

Vol 11 (3) ◽

pp. 163 ◽

Cited By ~ 2

Author(s):

Omed Gh. Abdullah ◽

Yahya A. K. Salman ◽

Dana A. Tahir ◽

Gelas M. Jamal ◽

Hawzhin T. Ahmed ◽

...

Keyword(s):

Ionic Conductivity ◽

Polyvinyl Alcohol ◽

Polymer Electrolyte ◽

Solid Polymer Electrolytes ◽

Solid Polymer ◽

Zno Nanoparticle ◽

Transport Parameters ◽

Zno Nps ◽

Proton Conducting ◽

Wide Range

Proton conducting nanocomposite solid polymer electrolytes (NSPEs) based on polyvinyl alcohol/ammonium nitrate (PVA/NH4NO3) and different contents of zinc oxide nanoparticles (ZnO-NPs) have been prepared using the casting solution method. The XRD analysis revealed that the sample with 2 wt.% ZnO-NPs has a high amorphous content. The ionic conductivity analysis for the prepared membranes has been carried out over a wide range of frequencies at varying temperatures. Impedance analysis shows that sample with 2 wt.% ZnO-NPs has a smaller bulk resistance compared to that of undoped polymer electrolyte. A small amount of ZnO-NPs was found to enhance the proton-conduction significantly; the highest obtainable room-temperature ionic conductivity was 4.71 × 10−4 S/cm. The effect of ZnO-NP content on the transport parameters of the prepared proton-conducting NSPEs was investigated using the Rice–Roth model; the results reveal that the increase in ionic conductivity is due to an increment in the number of proton ions and their mobility.

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ZnO Nanoparticle-based Seed Priming Modulates Early Growth and Enhances Physio-biochemical and Metabolic Profiles of Fragrant Rice Against Cadmium Toxicity

10.21203/rs.3.rs-113495/v1 ◽

2020 ◽

Author(s):

Yuzhan Li ◽

Luxin Liang ◽

Wu Li ◽

Umair Ashraf ◽

Lin Ma ◽

...

Keyword(s):

Heavy Metals ◽

Seed Germination ◽

Cadmium Toxicity ◽

Seed Priming ◽

Zno Nanoparticle ◽

Cd Stress ◽

Fresh Weight ◽

Toxic Heavy Metals ◽

Zno Nps ◽

Fragrant Rice

Abstract Background: Cadmium (Cd) is among the most toxic heavy metals that severely affects crop growth, and in this purview numerous recent research initiatives have focused on the application of nanoparticles (NPs) to negate the toxic effects of heavy metals such as Cd. Method: In the present study, the seeds of two fragrant rice cultivars, namely Yuxiangyouzhan and Xiangyaxiangzhan, were grown after exposure to four ZnO NPs treatment (0, 25, 50, and 100 mg L-1), with or without the presence of Cd (100 mg L-1). Result: The results revealed that priming seeds with ZnO NPs had no significant effect on the seed germination (p > 0.05) however, it substantially improved the seedling growth and other related physiological attributes under the Cd stress. The mean fresh weight of the shoot, and whole seedling increased after ZnO NPs treatment by 16.92%-27.88% and 12.82-33.58%, respectively. The fresh weight of root, length of the shoot, and the root increased after ZnO NPs treatment. Moreover, remarkable changes in the physiological response of seedlings under ZnO NPs treatment were detected. The metabolomic analysis was performed to discern the underlying regulation of the metabolisms after ZnO NPs treatment for seedlings under Cd stress. Conclusion: Our findings provide new insight into the influence of ZnO NPs on seed germination, and the growth of crop plants, and may find potential applications in developing crop resilience in Cd laden agricultural lands.

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