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Academic literature on the topic 'ZINC OXIDE NANOPARTICLE'

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Published: 11 September 2023

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Journal articles on the topic "ZINC OXIDE NANOPARTICLE"

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Rajan Abhinaya, Shymala, and Ramakrishnan Padmini. "BIOFABRICATION OF ZINC OXIDE NANOPARTICLES USING PTEROCARPUS MARSUPIUM AND ITS BIOMEDICAL APPLICATIONS." Asian Journal of Pharmaceutical and Clinical Research 12, no. 1 (January 7, 2019): 245. http://dx.doi.org/10.22159/ajpcr.2018.v12i1.28682.

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Objective: The objective of the study is to perform the synthesis of zinc oxide nanoparticles using the bark extract of Pterocarpus marsupium and to evaluate its biomedical applications.Methods: Various concentrations of zinc acetate are used, and synthesis conditions were optimized to get a stable nanoparticle. The finest synthesis condition for zinc oxide nanoparticle production was at pH 7 with 20 ml extract, zinc acetate 10 mM, and 120 min of reaction time. The synthesized nanopowder was characterized using various analytical techniques, such as ultraviolet (UV)-visible spectroscopy, Fourier-transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD), and scanning electron microscopy (SEM). The synthesized nanoparticles were tested for their antimicrobial, anti-inflammatory, inhibition of lipid peroxidation, and inhibition of amylase activity.Results: The size range of nanoparticles obtained was in the range of 10–32 nm as reported by SEM. The UV-visible absorption spectrum of the synthesized nanoparticle showed a peak at 340 nm, which confirmed the presence of nanoparticles. FTIR spectroscopy analysis indicated the presence of zinc oxide stretching at 666.22 cm-1. Further, the IR spectra indicated the presence of alcohols and acids, which can act as capping agents around the nanoparticles. XRD analysis confirmed the crystalline nature of nanoparticles.The synthesized nanoparticle showed appreciable antimicrobial activity. Zinc oxide nanoparticles at 40 μg/well were tested against phytopathogens, Pseudomonas aeruginosa, Staphylococcus aureus, Aspergillus flavus, and Aspergillus niger showed 16, 13, 15, and 16 mm zones of inhibition, respectively. The synthesized nanoparticle showed a considerable increase in inhibition of lipid peroxidation and amylase activity. The nanoparticle also exhibited appreciable anti-inflammatory activity measured by the inhibition of albumin denaturation.Conclusion: The study instigates the simple and convenient method of synthesizing zinc oxide nanoparticles using P. marsupium and its few biomedical applications.
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Rajan Abhinaya, Shymala, and Ramakrishnan Padmini. "BIOFABRICATION OF ZINC OXIDE NANOPARTICLES USING PTEROCARPUS MARSUPIUM AND ITS BIOMEDICAL APPLICATIONS." Asian Journal of Pharmaceutical and Clinical Research 12, no. 1 (January 7, 2019): 245. http://dx.doi.org/10.22159/ajpcr.2019.v12i1.28682.

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Objective: The objective of the study is to perform the synthesis of zinc oxide nanoparticles using the bark extract of Pterocarpus marsupium and to evaluate its biomedical applications.Methods: Various concentrations of zinc acetate are used, and synthesis conditions were optimized to get a stable nanoparticle. The finest synthesis condition for zinc oxide nanoparticle production was at pH 7 with 20 ml extract, zinc acetate 10 mM, and 120 min of reaction time. The synthesized nanopowder was characterized using various analytical techniques, such as ultraviolet (UV)-visible spectroscopy, Fourier-transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD), and scanning electron microscopy (SEM). The synthesized nanoparticles were tested for their antimicrobial, anti-inflammatory, inhibition of lipid peroxidation, and inhibition of amylase activity.Results: The size range of nanoparticles obtained was in the range of 10–32 nm as reported by SEM. The UV-visible absorption spectrum of the synthesized nanoparticle showed a peak at 340 nm, which confirmed the presence of nanoparticles. FTIR spectroscopy analysis indicated the presence of zinc oxide stretching at 666.22 cm-1. Further, the IR spectra indicated the presence of alcohols and acids, which can act as capping agents around the nanoparticles. XRD analysis confirmed the crystalline nature of nanoparticles.The synthesized nanoparticle showed appreciable antimicrobial activity. Zinc oxide nanoparticles at 40 μg/well were tested against phytopathogens, Pseudomonas aeruginosa, Staphylococcus aureus, Aspergillus flavus, and Aspergillus niger showed 16, 13, 15, and 16 mm zones of inhibition, respectively. The synthesized nanoparticle showed a considerable increase in inhibition of lipid peroxidation and amylase activity. The nanoparticle also exhibited appreciable anti-inflammatory activity measured by the inhibition of albumin denaturation.Conclusion: The study instigates the simple and convenient method of synthesizing zinc oxide nanoparticles using P. marsupium and its few biomedical applications.
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Wang, Dongyue, Yuhang Meng, Aidong Tang, and Huaming Yang. "Dehydroxylation of Kaolinite Tunes Metal Oxide–Nanoclay Interactions for Enhancing Antibacterial Activity." Minerals 12, no. 9 (August 29, 2022): 1097. http://dx.doi.org/10.3390/min12091097.

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Engineered nanoparticle–support interaction is an effective strategy for tuning the structures and performance of engineered nanoparticles. Here, we show that tuning the dehydroxylation of kaolinite nanoclay as the support could induce zinc oxide–kaolinite interactions. We used free energy theory, electron microscopy, and X-ray photoemission spectroscopy to identify interaction strengths between metal oxides and the underlying nanoclay induced by dehydroxylation. Desirable exposure of nanoparticle sites and the geometrical and crystal structure were obtained by tuning the interface interactions between ZnO nanoparticles and nanoclay. The surface free energy of zinc oxide–nanoclay results in different interfacial interactions, and the properties of the surface free energy electron-donating (γ−) and electron-accepting (γ+) parameters have significant effects on the electron acceptor. This could, in turn, promote stronger interactions between zinc oxide and the kaolinite surface, which produce more active (0001) Zn-polar surfaces with promoting zinc oxide nanoparticles growing along the <0001> direction. Reactive oxygen species, leached zinc ions, and electron transfer can modulate the antibacterial activities of the samples as a function of interface free energy. This further demonstrates the interfacial interactions induced by dehydroxylation. This work has new application potential in biomedicine and materials science.
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Mikhailov, M. M., S. A. Yuryev, A. N. Lapin, and V. A. Goronchko. "The effect of high-temperature nanoparticle-based modification on the structure of zinc oxide powders." Journal of Physics: Conference Series 2291, no. 1 (July 1, 2022): 012019. http://dx.doi.org/10.1088/1742-6596/2291/1/012019.

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Abstract The authors have studied the effect of solid-state nanoparticle-based modification on the structure of zinc oxide powders. To carry out the experiment, seven types of nanoparticles of various oxides were applied. The modification was performed by heating the powder mixtures in the air at 650°C for 2 hours. The concentration of nanopowders was 10 wt.%, the average grain size of nanoparticles varied from 10 to 80 nm. It was established that high-temperature nanoparticle-based modification does not lead to significant structural changes and cannot affect the properties of zinc oxide powder. While modifying zinc oxide powders, an increase in photo- and radiation stability can occur primarily because of mechanisms associated with the deposition of nanoparticles on the surface of the micropowder. Due to structural changes, certain types of nanoparticles (e.g., alumina in the sample under investigation) can make a rather insignificant contribution to the stability of optical properties when exposed to radiation.
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Basharat, Muhammad Haseeb, Muhammad Tariq, Riaz Mustafa, Amar Akash, Hafiza Hira Talib, Muhammad Nouman Aziz, Anadil Noel, et al. "Biologically Synthesized Zinc Oxide Nanoparticles and Carbon Tetrachloride as an Anti Cancer Drug: A Review." Pakistan Journal of Medical and Health Sciences 16, no. 6 (June 30, 2022): 1046–49. http://dx.doi.org/10.53350/pjmhs221661046.

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Cancer is a life-threatening disease, curing it is one of the primary tasks for scientists around the world. One of the major fields that have exceptional abilities to control cancer is nanotechnology and nano medicines. Zinc oxide nanoparticles have flexible platforms for therapeutic and biomedical practice. There is a vital need to manufacture a new anti-cancerous drug. Zinc oxide nanoparticles have a great potential to act as an anti-cancerous drug. A common effect of zinc nanoparticle and carbon tetrachloride is the primary concern on the liver, biologically synthesized nanoparticles can be used for this cure purpose. This review study aims to explain the effects of synthesized nanoparticles on the rat in the presence of CCl4; Combination of toxic substance with the presence of nanoparticle can give us a better idea on the effectiveness of nanoparticle. Keywords: Zinc oxide nanoparticles, Liver cirrhosis, Carbon tetrachloride, Liver function
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David, S. Begila. "ANTIBACTERIAL ACTIVITY OF ZINC OXIDE NANOPARTICLE BY SONOCHEMICAL METHOD AND GREEN METHOD USING ZINGIBER OFFICINALE." Green Chemistry & Technology Letters 2, no. 1 (March 10, 2016): 11–15. http://dx.doi.org/10.18510/gctl.2016.212.

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Nanoparticles have made a steady progress in all the branches of science. It is used in biological applications including nanomedicine. Zinc oxide is also known as Zincite generally seen in a crystalline form. Zinc oxide nanoparticles are multifunctional. It has effective antibacterial activity. This study focuses on the synthesis of zinc oxide nanoparticle by the sonochemical and green method, characterized by XRD, SEM and to determine the antibacterial efficacy of green and chemical techniques.Results prove that green synthesized Zinc oxide nanoparticle shows the enhanced biocidal activity. In addition the current study has demonstrated that the particle size variation and surface area to volume ratio of green synthesized Zinc oxide nanoparticles are responsible for significant high antibacterial activity. From the result obtained it suggested that the biogenic green fabrication is a better choice due to eco-friendliness.
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Baiee, Noor Al-Huda, and Ayad F. Alkaim. "Photocatalytic Degradation of Methylene Blue Dye from Aqueous Solutions in the Presence of Synthesized ZnO Nanoparticles." NeuroQuantology 19, no. 8 (September 4, 2021): 53–58. http://dx.doi.org/10.14704/nq.2021.19.8.nq21112.

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The photo catalytic degradation of an aqueous solution of methylene blue dye has studied under different conditions of preparation Zinc oxide nanoparticles and study effect of various mass of zinc oxide on the removal of methylene blue dye and initial concentration of MB dye. Several techniques were used to determine the surface properties of the prepared nano-zinc oxide such as XRD, TEM. Results showed that, the phot catalytic degradation process was high at the beginning and then decreased with time. and the phot catalytic degradation efficiency, increased by increasing weight of zinc oxide nanoparticle from 0.05 g to 0.3 g. and decrease with increase weight of zinc oxide nanoparticle from 0.5 g to 0.7g. also showed that the best weight to removal MB dye 0.3 gm.
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Chang, Sheng-Po, and Kuan-Jen Chen. "Zinc Oxide Nanoparticle Photodetector." Journal of Nanomaterials 2012 (2012): 1–5. http://dx.doi.org/10.1155/2012/602398.

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A zinc oxide (ZnO) nanoparticle photodetector was fabricated using a simple method. Under a 5 V applied bias, its dark current and photocurrent were1.98×10-8and9.42×10-7 A, respectively. In other words, a photocurrent-to-dark-current contrast ratio of 48 was obtained. Under incident light at a wavelength of 375 nm and a 5 V applied bias, the detector’s measured responsivity was 3.75 A/W. The transient time constants measured during the turn-ON and turn-OFF states wereτON=204 sandτOFF=486 s, respectively.
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Jamnongkan, Tongsai, Sathish K. Sukumaran, Masataka Sugimoto, Tomijiro Hara, Yumiko Takatsuka, and Kiyohito Koyama. "Towards novel wound dressings: antibacterial properties of zinc oxide nanoparticles and electrospun fiber mats of zinc oxide nanoparticle/poly(vinyl alcohol) hybrids." Journal of Polymer Engineering 35, no. 6 (August 1, 2015): 575–86. http://dx.doi.org/10.1515/polyeng-2014-0319.

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Abstract Zinc oxide (ZnO) nanoparticles possess antibacterial properties. Being less toxic to humans than silver, they are attractive as antibacterial agents in biomedical applications. In this study, we focus on the influence of the size of ZnO nanoparticles on their antibacterial action against strains of three bacteria: one Gram-negative, Escherichia coli and two Gram-positive, Bacillus subtilis and Staphylococcus aureus. The antibacterial efficacy of the nanoparticles increases with decreasing particle size. A major contributor to antibacterial action is the oxidative stress induced by the ZnO. To understand the relationship between antibacterial action and induced oxidative stress, we measured the dependence of the nanoparticle diameter on H2O2 concentration. Even at a fixed nanoparticle concentration, the H2O2 concentration increased with decreasing nanoparticle diameter. This is qualitatively similar to the dependence of the antibacterial activity on the nanoparticle diameter. In addition, in the presence of ZnO nanoparticles, we detected increased quantities of endogenous H2O2 in the E. coli. For use as antibacterial wound dressings, we fabricated nonwoven fiber mats from poly(vinyl alcohol) (PVA)/ZnO nanoparticle suspensions. The antibacterial efficacy of the PVA/ZnO electrospun fiber mats also increased with a decrease in the diameter and an increase in the concentration of the ZnO nanoparticles.
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Raja, Mohan, A. M. Shanmugaraj, and Sung Hun Ryu. "Preparation of Template Free Zinc Oxide Nanoparticles Using Sol–Gel Chemistry." Journal of Nanoscience and Nanotechnology 8, no. 8 (August 1, 2008): 4224–26. http://dx.doi.org/10.1166/jnn.2008.an24.

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Zinc oxide (ZnO) nanoparticle has been synthesized via sol–gel chemistry using zinc acetate as a precursor with sodium hydroxide solution through microemulsion technique. X-ray diffraction (XRD) and transmission electron microscopy (TEM) studies reveal that the resultant zinc oxide nanoparticles are wurtzite type with the controlled morphology of nano triangular and half ellipsoid structures. Room temperature photoluminescence measurement of zinc oxide nanoparticles exhibits a strong green band at around 375 nm with excitation energy of 3.30 eV indicating oxygen vacancies on the surface of the nanoparticles.
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Dissertations / Theses on the topic "ZINC OXIDE NANOPARTICLE"

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Lennox, Martin. "Synthesis of zinc / zinc oxide nanoparticle-carbon nanotube composites." Thesis, McGill University, 2014. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=121192.

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This thesis presents a novel process for the synthesis of zinc/zinc oxide nanoparticle-carbon nanotube composites. The process combines aerosol flow condensation for the synthesis of nanoparticles with a radio-frequency glow discharge in order to facilitate the deposition of these nanoparticles on nanostructured surfaces consisting of carbon nanotubes grown directly on stainless steel substrates. The design, construction and optimization of the process is described. A maximum observed nanoparticle deposition rate of 500 nm/min was observed when layers of nanoparticles were deposited on silicon wafers. Significant variation in the nanoparticle deposition rate was also observed; 95% confidence intervals on the prediction of nanoparticle layer thicknesses were approximately ±225nm and ±550nm for the evaporative source temperature range of 575 to 625 °C and measured average evaporation rate range of 0.009 to 0.048 g/min, respectively. A core/shell structure of zinc/zinc oxide nanoparticles is inferred from electron diffraction, X-ray diffraction, and X-ray photoelectron spectroscopy data. The utility of the synthesized nanocomposites as cathode materials is evaluated in a model direct-current glow discharge system. No significant reduction in the voltages required to sustain the glow discharge were observed when the synthesized nanocomposites were tested, as compared to cathodes of nanostructured carbon nanotube surfaces or bare stainless steel cathodes.
Cette thèse présente un nouveau procédé de synthèse de nanotubes de carbone décorés de nanoparticules de zinc et oxyde de zinc. Le procédé combine la condensation d'un aérosol pour la synthèse de nanoparticules avec le traitement des particules en vol dans une décharge luminescente par radiofréquence. Cette méthode facilite le dépôt de nanoparticules sur ces surfaces nanostructurées telles que des nanotubes de carbone formés directement sur des substrats en acier inoxydable dans le cas présent. La conception, la construction et l'optimisation des processus sont décrits. Une vitesse de dépôt maximale de 500 nm/min a été observée lorsque les couches de nanoparticules ont été déposées sur des plaquettes de silicium. On a également observé une variation significative dans le taux de dépôt de nanoparticules; les intervalles de confiance à 95% pour le prédictions de l'épaisseur de la couche de nanoparticules étaient approximativement ±225 nm et ±550 nm pour la plage de température de la source d'évaporation de 575 à 625 °C tandis que le taux d'évaporation moyen mesuré variait de 0,009 à 0,048 g/min, respectivement. À partir des données de diffraction des électrons, de diffraction des rayons X ainsi que de spectroscopie photoélectronique aux rayons X, il a été possible de déduire que les nanoparticules ont une structure coeur-écorce composée de zinc et d'oxyde de zinc. L'utilité des nanocomposites synthétisés comme matériaux pour une cathode est évaluée dans un système de décharge luminescente en courant continu. Aucune réduction significative des tensions nécessaires au maintien de la décharge luminescente a été observée lorsque les nanocomposites synthétisés ont été testés, par rapport aux cathodes formées de surfaces nanostructurées de nanotube de carbone ou aux cathodes en acier inoxydable non-traité.
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McQuillan, Jonathan. "Bacterial-nanoparticle interactions." Thesis, University of Exeter, 2010. http://hdl.handle.net/10036/3101.

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Bionanotechnology is an intersection between biology and nanotechnology, a field in which novel applications for very small materials are being realised at an alarming rate. Nanoparticles have 3 dimensions that can be measured in nanometers, their small size conferring upon them different properties from individual atoms or the bulk material. The interactions between these unique materials and microorganisms are often toxic, thus have been exploited for antimicrobial applications. However, there is a considerable paucity of data for the underlying molecular mechanisms. This study has been carried out to investigate the interactions that occur between nanoparticles and bacteria with the objective of identifying these toxicological mechanisms and novel nanoparticle effects, using the model Gram negative organism Escherichia coli K12. This study has identified metal nanoparticles that are a superior vehicle for the delivery of toxic metal ions to E. coli. The nanoparticles associate with the bacterial surface, but do not cross the cell wall. They then dissolve, releasing a concentration of metal ions that accumulate at the bacterial-nanoparticle interface, enhancing the antibacterial efficacy compared to the concentration of metal ions in the bulk solution phase. Measurement of the whole transcriptome response to silver nanoparticles in comparison to the silver ion indicates that the different modes of ion delivery may induce a differential stress response. Moreover, this data identifies molecular mechanisms that are involved in the toxicity of this metal that is now becoming increasingly prevalent in society. The dissolution based toxic effects of zinc oxide nanoparticles are augmented by an interaction with ultra-violet light, offering an alternative mode for nanoparticle toxicity.
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Walker, Nicholas David Leyland. "The role of the nano-environmental interface in ZnO and CeO2 nanoparticle ecotoxicology." Thesis, University of Exeter, 2012. http://hdl.handle.net/10036/3734.

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An increase in nanotechnology has seen an associated rise in nanoparticles released into the environment. Their potential toxicity and exposure to humans and the environment, the field of nanoecotoxicology, is not yet well understood. The interactions at the nanoparticle surface will play a fundamental role in the nanoparticle behaviour once released into the environment. This study aims to characterise the particle surface interaction, determining key parameters influential in the nanoparticle fate. Evanescent Wave Cavity Ring Down Spectroscopy techniques have been applied to study molecular interactions at the silica-water charged interface. The adsorption of the electronic spectrum of Crystal Violet has demonstrated the formation of a monolayer with different binding site orientation at the interface. The binding affinity for the chromophore was calculated as 29.15 ± 0.02 kJmol-1 at pH 9 and this was compared with other interface structures involving both inorganic and organic components. The study of the model interface was extended to the properties of CeO2 nanoparticles, where the surface charge density was determined to be 1.6 ± 0.3 e- nm-2.The nanoparticle surface charge controls the suspension stability which was measured for CeO2 nanoparticles giving a stability half-life of 330 ± 60 hours in pure water, and 3.6 ± 0.6 hours in ISOFish water. Studies were extended to the toxicity of ZnO nanoparticles. An assay was developed to quantify the photo-electron production for nanoparticles exposed to UV light both in deionised water and soil suspensions with a photo-radical production yield of 19 ± 2 % and an electron production of 709 e-s-1np-1 for a 100 mgL-1 suspension. The species-specific photo-radical assay was subsequently used to determine the rate of ZnO nanoparticle dissolution in water and soil suspensions. Comparable dissolution rates in complex cell growth media were also measured, detecting total zinc by Inductively Coupled Plasma Atomic Emission Spectroscopy, with comparable dissolution rates derived.
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Khoza, Phindile Brenda. "Phthalocyanine-nanoparticle conjugates for photodynamic therapy of cancer and phototransformation of organic pollutants." Thesis, Rhodes University, 2015. http://hdl.handle.net/10962/d1017918.

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The synthesis and extensive spectroscopical characterization of novel phthalocyanines are reported. The new compounds were characterized by elemental analysis, FT-IR, ¹HNMR, mass spectrometry and UV–Vis spectroscopy. The new phthalocyanines showed remarkable photophysicochemical behaviour. The novel phthalocyanines were then conjugated to nanoparticles, silver and ZnO. The coupling of the novel Pcs to nanoparticles was through covalent bonding and ligand exchange. These conjugates were supported onto electrospun polystyrene fibers and chitosan microbeads for use as photocatalysts. The efficiency of the immobilized Pcs and Pc-nanoparticles was assessed by the phototrasfromation of organic pollutants, methyl orange and Rhodamine 6G as model dyes. Upon conjugating phthalocyanines to nanoparticles, there was a great increase in the rate of photodegradation of the model dyes. The photodynamic activity of the novel phthalocyanines upon conjugating to nanoparticles and selected targeting agents is also reported. The targeting agents employed in this study are folic acid and polylysine. Conjugating the phthalocyanines to folic acid or polylysine improved the solubility of the phthalocyanines in aqueous media. The potency of the conjugates was investigated on breast (MCF-7), prostate and melanoma cancer cell lines. The phthalocyanines showed no toxicity in the absence of light. However, upon illumination, a concentration dependent cellular decrease was observed.
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Gunti, Srikanth. "Enhanced Visible Light Photocatalytic Remediation of Organics in Water Using Zinc Oxide and Titanium Oxide Nanostructures." Scholar Commons, 2017. http://scholarcommons.usf.edu/etd/6852.

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The techniques mostly used to decontaminate air as well as water pollutants have drawbacks in terms of higher costs, require secondary treatment, and some methods are very slow. So, emphasis has been given to water though the use of photocatalysts, which break organic pollutants to water and carbon dioxide and leave no trace of by-products at the end. Photocatalytic remediation aligns with the waste and wastewater industries’ zero waste schemes with lower cost, eco-friendly and sustainable treatment technology. The commonly used photocatalysts such as titanium oxide (TiO2), zinc oxide (ZnO), tungsten oxide (WO3) have band gap of nearly 3.2 eV. The lower energy band-gap of a semiconductor makes it a better photocatalyst. The major drawbacks of photocatalysts are its inefficiency to work under visible light and high photocorrosion which limits its uses. These limitations can be mitigated through dopants and the formation of varying morphologies like nanowires, nanoparticles, nanotubes etc. Several organic pollutants are insoluble in water, which inhibits the pollutant (insoluble) to come in contact with photocatalytic material thus hindering remediation characteristic of a photocatalyst. Binder material used to immobilize the photocatalytic material tends to decompose due to oxidative and reduction reactions around the photocatalyst which causes the loss of photocatalytic material. This investigation displays the advantage of organic remediation in visible radiation using graphene (G) doped TiO2 nanoparticles and nanowires. The nanostructured G-TiO2 nanoparticles and G-TiO2 nanowires were synthesized using sol-gel and hydrothermal methods. The nanostructured materials were characterized using scanning electron microscopy (SEM), Transmission electron microscopy (TEM), X-ray diffraction (XRD), UV-visible spectroscopy (UV-vis), Fourier transform infrared spectroscopy (FTIR) and particle analyser procedures. The remediation of organic compounds (methyl orange) in water was achieved under visible radiation using graphene doped nanostructured photocatalytic materials. The sol-gel synthesized G-TiO2 nanoparticles has shown complete remediation of methyl orange (MO) in less than four hours, thus displaying enhanced photocatalytic activity achieved through graphene doping on TiO2 nanostructures The dopant and structure introduced in zinc oxide (ZnO) nanomaterials bring foundation for enhanced photocatalytic activity due to lowering of the band gap, and decreasing of photocorrosion through delaying of electron-hole recombination. The challenge to synthesize both nanowire and nanoparticle structures of ZnO doped with graphene (G) are carried out by simple and cost effective hydrothermal as well as super saturation precipitation techniques, respectively. Various nanostructures of ZnO have been synthesized using precipitation and hydrothermal methods are ZnO nanoparticles, G doped ZnO nanoparticles, ZnO nanowires, G doped ZnO nanowires, TiO2 seeded ZnO nanowires and G doped TiO2 seeded ZnO nanowires The synthesized ZnO based nanostructures were characterized using SEM, TEM, XRD, UV-vis, FTIR and particle analyser methods respectively. The standard organic pollutant methyl orange (MO) dye was employed in the water to understand the effective remediation using ZnO nanostructured materials under visible light radiation. The G-ZnO NW structure has shown effective remediation of MO in water in three hours compared to other synthesized nanostructured ZnO materials. The petroleum compounds were photocatalytically remediated from water using G- TiO2 nanoparticles material in visible light radiation. The G-TiO2 nanoparticle was synthesized using sol-gel technique and used on various petroleum-based chemicals (toluene, naphthalene and diesel) were remediated, and samples were analysed using optical and gas chromatography (GC) techniques. The importance of pollutant to come in contact with photocatalyst have been demonstrated by employing surfactant along with G-TiO2 nanoparticles to remediate naphthalene. Earlier studies in this investigation have shown that graphene (G) doping in both titanium oxide (TiO2) and zinc oxide (ZnO), has brought about a reduction in photocorrosion, and an increase in the photocatalytic efficiency for remediation of organics under visible light (λ > 400nm). However, the graphene doped photocatalysts have proven to be hard to coat on a surface, due to the strong hydrophobic nature of graphene. So, attempts have been made to use polyaniline (PANI), a conducting polymer, as a binder material by insitu polymerization of aniline over G-TiO2 nanoparticles (G-TiO2 NP) and G-ZnO nanowires (G-ZnO NW) & characterized using SEM, XRD, UV-vis and FTIR techniques. The photocatalytic, as well as photoelectrochemical catalytic performance of PANI:G-TiO2 NP and PANI:G-ZnO NW, were investigated. The standard MO in water was used for both PANI:G-TiO2 NP and PANI:G-ZnO NW electrodes on conducting substrates. 1:1 PANI:G-TiO2 NP shows an increase of 31% in the remediation of MO in water at potential of +1000 mV, and with the ease in coating PANI:G-TiO2 NP and PANI:G-ZnO NW on various substrates, on top of the visible light remediation allows for the use of these materials and process to be used for practical applications of remediation of organics from water.
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Louka, Chrysovalanto. "Controlling the toxicity of zinc oxide nanowires in vitro skin models." Thesis, Université Grenoble Alpes, 2020. https://thares.univ-grenoble-alpes.fr/2020GRALU004.pdf.

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Les nanofils d'oxyde de zinc (ZnONW) attirent beaucoup d'attention scientifique en raison de leurs propriétés optoélectriques, piézoélectriques et semi-conductrices, qui en font un bon candidat pour les capteurs et l'électronique intégrées dans les textiles. Ces applications augmentent les risques d'exposition cutanée, de qui rend l’étude de leur toxicité cruciale, d'autant plus que les études récentes démontrent une toxicité liée aux ions de zinc due à la dissolution. Malheureusement, la compréhension de l'impact des ZnONWs sur la peau est limitée. Par conséquent, l'objectif de ce projet est d'acquérir une compréhension approfondie du danger potentiel des ZnONWs sur la peau (humaine) in vitro et de la façon dont leurs propriétés physicochimiques sont liées à cela.Ici, une caractérisation physico-chimique étendue des ZnONWs a été effectuée dans des milieux de cultures de cellules (GlutaMAX) avec et sans sérum, et dans des suspensions milli Q eau (mQ H2O). Les résultats ont montré que la dissolution de la suspension stock, où les deux nanomatériaux ZnO (ZnONM) sont dans mQ H2O, a atteint une concentration en ions zinc à l'équilibre de 15 µg / mL immédiatement, tandis que les études de dimensions ont montré une forte agrégation dans GlutaMAX sans sérum et une agrégation réduite dans les milieux GlutaMAX avec du sérum . Il a été démontré que les conditions de stockage de l'incubateur à 5% de CO2 et à 37 ° C ont un impact sur la dissolution en abaissant le pH de la suspension aqueuse milli Q et en formant éventuellement des complexes de carbonate de zinc dans les milieux.L'examen de la cytotoxicité des ZnONW dans la monoculture cutanée et la comparaison avec les nanoparticules de ZnO (ZnONP) et le chlorure de zinc (ZnCl2) a montré que les ZnONM induisaient une cytotoxicité et une baisse de viabilité cellulaire significatives à partir de 40,2 µg / mL d'équivalent zinc, avec moins de 40% de cellules viables. La comparaison avec le ZnCl2 a montré une association claire entre la dissolution et la cytotoxicité cellulaire.Pour évaluer davantage l'impact réel des ZnONW dans la peau, un système de co-culture dans l'interface air-liquide (ALI) composé d'épiderme et de cellules cutanées du derme a été développé après uneoptimisation en monoculture de chaque type de cellule. Le système de modèle de peau 3D a été exposé aux ZnONPs, ZnONWs et ZnCl2. Pour empêcher la dissolution des ZnONW, une couche de dioxyde de titane (TiO2) de 5,75 ± SD 1,06 nm a été déposée par dépôt de couche atomique (ALD) sur les ZnONWs. Les ZnONWs recouverts de TiO2 ont également été testés pour leur toxicité sur le système de co-culture.Les résultats des expositions ont montré une mort cellulaire significative avec seulement 20% de cellules vivantes, après traitement aux ZnONMs et au ZnCl2 à 80,4 µg tandis que le traitement aux ZnONW revêtus de TiO2 maintenait au moins 75% de viabilité cellulaire même à 80,4 µg. Cependant, un examen plus approfondi des médiateurs (pro-) inflammatoires après le traitement a montré que les ZnONW revêtus de TiO2 augmentaient les niveaux d'interleukine (IL) 8 et 6 (pro-) inflammatoires par rapport aux ZnONW sans couche de TiO2. Cela pourrait soulever d'autres problèmes de toxicité
Zinc oxide nanowires (ZnONWs) are attracting a lot of scientific attention due to their optoelectrical, piezoelectrical and semiconducting properties, which make them a good candidate for sensors and wearable electronics. These applications increase the chance of skin exposure, hence the investigation of their safety is crucial, especially since studies on ZnONWs show a zinc ion related toxicity due to their dissolution. Unfortunately, understanding of ZnONWs impact on skin is limited. Therefore, it is the objective of this project to gain an insightful understanding of the potential hazard of ZnONWs upon (human) skin in vitro and how their physicochemical properties are related to this.Herein, an extensive ZnONWs physicochemical characterisation was performed in media with and without serum, and in milli Q water (mQ H2O) suspensions. Results showed the stock dissolution, where both ZnO nanomaterials (ZnONMs) are in mQ H2O, reached a zinc ion concentration at equilibrium of 15 µg/mL immediately, while size studies showed high aggregation in GlutaMAX without serum and reduced aggregation in GlutaMAX media with serum. Incubator storing conditions of 5% CO2 and 37oC were shown to have an impact on the dissolution by lowering the pH of the milli Q water suspension and possibly forming zinc carbonate complexes in media.Examining the cytotoxicity of ZnONWs in skin monoculture and comparing it to ZnO nanoparticles (ZnONPs) and zinc chloride (ZnCl2), showed that ZnONMs induced a significant cytotoxicity and cell death from 40.2 µg/mL zinc equivalent, with less than 40% viable cells. Comparison with the ZnCl2 showed a clear association between dissolution and cell cytotoxicity.To assess further the actual impact of ZnONWs in the skin, a co-culture system in Air-Liquid-Interface (ALI) consisting of epidermis and dermis skin cells was developed after monoculture optimisation of each cell type. The 3D skin model system was exposed to ZnONPs, ZnONWs and ZnCl2. To prevent the dissolution of ZnONWs, a 5.75±SD 1.06 nm Titanium dioxide (TiO2) shell was deposited via Atomic layer deposition (ALD) on the ZnONWs. The TiO2 coated ZnONWs were also tested for their toxicity on the co-culture system.Results of the exposures showed a significant cell death with only 20% alive cells, after ZnONMs and ZnCl2 treatment at 80.4 µg whilst the TiO2 coated ZnONWs treatment maintained at least 75% cell viability even at 80.4 µg. However, further examination of (pro-) inflammatory mediators after treatment showed that TiO2 coated ZnONWs increased levels of (pro-)inflammatory Interleukin (IL) 8 and 6 compared to bare ZnONWs. This could raise further safety issues
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Wong, Ka-kan, and 黃嘉勤. "Investigation on the effect of ZnO nanoparticle properties on dye sensitized solar cell performance." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2012. http://hub.hku.hk/bib/B49618246.

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Zinc oxide (ZnO) is a wide band-gap semiconductor that is of interest for application in dye sensitized solar cells (DSSCs) because of similarity of its properties to TiO2. Unlike TiO2, ZnO can readily be grown in a wide variety of morphologies, using inexpensive, simple, and low temperature methods. Recent research on ZnO-based DSSCs focuses on modifying the ZnO layer morphology in order to maximize surface area, and enhance the electron collection by providing fast electron transport. It is expected that the improvement in cell performance by morphology modification is due to higher dye loading, increased electron lifetime and fast electron transport. However, ZnO properties may be affected by various synthesis methods. It is difficult to make a conclusion whether the change of performance are attributed to change of morphology or a change in the defect types and/ or defect concentrations. In this study, the influence of ZnO nanoparticle properties on cell performance has been investigated. Commercial ZnO nanoparticles with different sizes and optical properties were utilized. It was found that there is a complex relationship between native defects, dye loading, charge transport and photovoltaic performance. In particular, the presence of non-radiative defects was found to be detrimental to photovoltaic performance. In addition, with the similar defect emission intensities, sample exhibiting orange-red defect emission showed better performance than the samples emitting green defect emission. Nanoparticle properties and their relationship between dye adsorption, electron injection, electron lifetime and electron transport, and photovoltaic performance will be discussed.
published_or_final_version
Physics
Master
Master of Philosophy
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Ruankham, Pipat. "Studies on Morphological Effects and Surface Modification of Nanostructured Zinc Oxide for Hybrid Organic/Inorganic Photovoltaics." Kyoto University, 2014. http://hdl.handle.net/2433/188820.

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CRAPANZANO, ROBERTA. "Insight into ZnO luminescence to engineer nanoparticles for X-Ray based cancer treatment." Doctoral thesis, Università degli Studi di Milano-Bicocca, 2022. http://hdl.handle.net/10281/366193.

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Nanoparticles disclose unique properties that enable their applications in different fields, such as energy, catalysis, opto-electronics, and medicine. At the nanosize, the surface-to-volume ratio is increased, leading to the formation of defects that influence the resultant features, e.g. the catalytic and optical behaviours of the systems. Moreover, the high surface area and reactivity of nanoparticles allow their functionalization with several ligands, enhancing their versatility, especially in the biomedical field. Indeed, the accuracy and efficiency of several diagnoses and treatments may improve by implementing traditional strategies with targeted nano-agents. Among the nanomedicine researches, heavy nanoparticles are promising for the innovation of radiotherapy and for the development of novel oncological procedure, such as X-Ray induced photodynamic therapy, that exploits the combination of nanoscintillators and photosensitizers. In this context, ZnO is of particular interest. Indeed, ZnO is a wide band gap semiconductor that displays emissions in the visible region of the spectrum, surface reactivity, and biocompatibility. Moreover, upon X-Ray exposure, ZnO can generate cytotoxic species both directly, due to its catalytic activity, and indirectly, by activating the close photosensitizers, due to its ability to down-convert X-Ray photons into visible ones. This thesis focuses on the study of ZnO NPs for the innovation of X-Ray based cancer therapies. In detail, a fundamental investigation of the optical and catalytic properties of several ZnO samples is performed and used as background to design and develop ZnO based multicomponent nanosystems. Namely, the optical features of ZnO samples with different sizes (nanometric, micrometric, and bulk) and growth conditions are investigated by photoluminescence and radioluminescence techniques aiming at deepening the comprehension of the impact of morphology on the material defectiveness. A Gaussian reconstruction of all the spectra identifies in ZnO luminescence as many as five emission bands (one related to excitons and four to defects), whose spectral shapes and time decays vary with the dimensionality and the synthesis procedure. Moreover, the test of the ability of various nanosized ZnO sample to promote the production of different cytotoxic species unveils that their radio-catalytic activity is affected by the type and concentration of occurring point defects. Thus, by controlling the synthesis parameters and the morphology (size, shape, interfaces) of ZnO nanostructures, its defectiveness can be engineered to tune its optical and catalytic properties. Then, to realize a nano-agent for X-Ray induced photodynamic therapy, ZnO nanoparticles supported onto nanosized silica substrates with different porosity, are functionalized with various concentrations of porphyrins. The study of their optical properties reveals that, under light excitation, the dye luminescence is activated only by a rather poor re-absorption mechanism. Differently, upon X-Ray exposure, the porphyrin emission sensitization is enhanced, especially at low concentrations and high energy of the ionizing beams, by the locally augmented energy deposition favoured by ZnO, as also confirmed by Monte Carlo simulations. These findings highlight the synergic role of X-Ray and functionalization, paving the way for further studies on the impact of nano-agent design on its performances. This PhD project has been performed at the Department of Materials Science of the University of Milano-Bicocca, in collaboration with the NanoMat@Lab for the samples preparation and with Dr Anne-Laure Bulin of the Synchrotron Radiation for Biomedicine Group at the University of Grenoble-Alpes, INSERM, for the computational analysis.
Le nanoparticelle possiedono proprietà uniche che permettono il loro utilizzo in diversi settori, come la catalisi, l’opto-elettronica e la medicina. A livello nanometrico, il rapporto superficie-volume è alto, portando alla formazione di difetti che influenzano le proprietà del sistema, ad esempio le risposte catalitiche e ottiche. Inoltre, le elevate aree e reattività superficiali delle nanoparticelle consentono la loro funzionalizzazione con diversi leganti, incrementando la loro versatilità, soprattutto nell’ambito medico. L'accuratezza e l’efficacia di diagnosi e terapie può migliorare implementando le strategie tradizionali con nano-agenti. Tra i campi di ricerca in nanomedicina, nanoparticelle con alto numero atomico sono promettenti per innovare la radioterapia e per sviluppare nuove procedure oncologiche, come la terapia fotodinamica indotta dai raggi X, che sfrutta nanoscintillatori combinati a fotosensibilizzatori. In questo ambito, ZnO è di grande interesse. ZnO è un semiconduttore che mostra emissioni nello spettro del visibile, reattività superficiale e biocompatibilità. Inoltre, esposto ai raggi X, ZnO può generare specie citotossiche sia direttamente, grazie alla sua attività catalitica, sia indirettamente, attivando i vicini fotosensibilizzatori, grazie alla sua abilità di convertire i fotoni X in visibili. Questa tesi concerne lo studio di NPs di ZnO per l’innovazione di terapie oncologiche attivate dai raggi X. In dettaglio, un’analisi fondamentale delle proprietà ottiche e catalitiche di diversi campioni di ZnO è condotta e usata come base per progettare nanosistemi multicomponente a base di ZnO. In particolare, le proprietà ottiche di campioni di ZnO con diverse dimensioni (nanometriche, micrometriche e massive) e condizioni di crescita sono studiate con tecniche di fotoluminescenza e radioluminescenza con l’obiettivo di approfondire la comprensione del ruolo della morfologia sulla difettualità. L’analisi numerica di tutti gli spettri identifica nella luminescenza di ZnO un massimo di cinque bande di emissione (una attribuita agli eccitoni e quattro ai difetti), le cui forme spettrali e tempi di vita variano con la dimensione e la procedura di sintesi. Inoltre, lo studio dell’abilità di diversi campioni nanometrici di ZnO di produrre specie citotossiche rivela che la sua attività radio-catalitica dipende dal tipo e dalla concentrazione dei difetti di punto. Quindi, il controllo dei parametri di sintesi e della morfologia (dimensione, forma, interfacce) potrebbe permette l’ingegnerizzazione dei difetti e quindi delle proprietà ottiche e catalitiche. Per realizzare un nano-agente per la terapia fotodinamica indotta dai raggi X, nanoparticelle di ZnO, supportate su substrati nanometrici di silice con diversa porosità, sono funzionalizzate con varie concentrazioni di porfirine. Lo studio delle loro proprietà ottiche rivela che, sotto eccitazione ottica, la luminescenza della porfirina è attivata solo da un meccanismo di riassorbimento con efficienza limitata. Invece, sotto radiazione ionizzante, l’emissione della porfirina è ben sensibilizzata, specialmente a basse concentrazioni e alte energie del fascio di raggi X, grazie al locale aumento del deposito di energia favorito dalle nanoparticelle di ZnO, come confermato dalle simulazioni. Questi risultati evidenziano il ruolo sinergico dei raggi X e della funzionalizzazione, aprendo a ulteriori studi sull’impatto della progettazione del nano-agente sulle sue prestazioni. Questo progetto è stato condotto nel Dipartimento di Scienza dei Materiali dell’università di Milano-Bicocca e in collaborazione con il NanoMat@Lab per la preparazione dei campioni e con la Dottoressa Anne-Laure Bulin dell’università di Grenoble-Alpes per l’analisi computazionale.
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Mileyeva-Biebesheimer, Olga. "An Investigation into Metal Oxide Nanoparticle Toxicity to Bacteria in Environmental Systems Using Fluorescence Based Assays." University of Toledo / OhioLINK, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1302125170.

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Books on the topic "ZINC OXIDE NANOPARTICLE"

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Roy, Nandini, Utshab Singha, Saurav Paul, Gaurav Kumar Pushp, Swagat Bardoloi, Maimy Debbarma, and Freeman Boro. Metal Oxide Nanomaterials. Edited by Sunayana Goswami (Ed.). Glasstree, 2020. http://dx.doi.org/10.20850/9781716360367.

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Engineered nanoparticles have been used widely in various sectors such as electronics, construction, health, energy, remediation and agriculture etc. In recent years, Metal oxide nanoparticles have become one of the important class of materials for both material and biological applications. For instance, Zinc oxide Nanoparticles has its effective bioapplications in various fields including pharmaceuticals, medicines, and agriculture. At the same time, these are of high important due to their utilization in biosensors, cosmetics, drug-delivery systems etc. This book documents some important aspects of metal oxide nanomaterials highlighting their material, environmental and biological prospects.
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house, book, and Amelia Prosperity. Synthesis of Nano Particles Using Thermal Treatment Method: Step by Step Method on How to Synthesis Zinc Oxide Nanoparticles. Independently Published, 2022.

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Book chapters on the topic "ZINC OXIDE NANOPARTICLE"

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Sadasivam, Narendhran, Rajiv Periakaruppan, and Rajeshwari Sivaraj. "Lantana aculeata L.-Mediated Zinc Oxide Nanoparticle-Induced DNA Damage in Sesamum indicum and Their Cytotoxic Activity Against SiHa Cell Line." In Phytotoxicity of Nanoparticles, 347–66. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-76708-6_15.

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Szőllősi, Réka, Árpád Molnár, Gábor Feigl, Dóra Oláh, Márk Papp, and Zsuzsanna Kolbert. "Physiology of Zinc Oxide Nanoparticles in Plants." In Plant Responses to Nanomaterials, 95–127. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-36740-4_4.

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Cao, Yachao, Xiaoying Hui, Akram Elmahdy, Hanjiang Zhu, and Howard I. Maibach. "Zinc Oxide Nanoparticles In Vitro Human Skin Decontamination." In Dermal Absorption and Decontamination, 315–34. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-031-09222-0_17.

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Chauhan, Ravi, Amit Kumar, Ramna Tripathi, and Akhilesh Kumar. "Advancing of Zinc Oxide Nanoparticles for Cosmetic Applications." In Handbook of Consumer Nanoproducts, 1–16. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-15-6453-6_100-1.

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Chauhan, Ravi, Amit Kumar, Ramna Tripathi, and Akhilesh Kumar. "Advancing of Zinc Oxide Nanoparticles for Cosmetic Applications." In Handbook of Consumer Nanoproducts, 1057–72. Singapore: Springer Nature Singapore, 2022. http://dx.doi.org/10.1007/978-981-16-8698-6_100.

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Thakur, Mansee, Smital Poojary, Kapil Singh Thakur, and Vinay Kumar. "Antimicrobial Potentials of Zinc and Iron Oxide Nanoparticles." In Nanotechnology in the Life Sciences, 353–68. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-031-10220-2_10.

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Chaudhary, Shrutika, Saurabh Shivalkar, and Amaresh Kumar Sahoo. "Biosynthesis of Zinc Oxide Nanoparticles and Major Applications." In Mycosynthesis of Nanomaterials, 172–92. Boca Raton: CRC Press, 2023. http://dx.doi.org/10.1201/9781003327387-10.

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Pardeshi, Chandrakant V., Swapnil N. Jain, and Nitin R. Shirsath. "Fungal-mediated Zinc Oxide Nanoparticles and their Applications." In Myconanotechnology, 301–25. Boca Raton: CRC Press, 2023. http://dx.doi.org/10.1201/9781003327356-17.

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Rajeshkumar, S., and D. Sandhiya. "Biomedical Applications of Zinc Oxide Nanoparticles Synthesized Using Eco-friendly Method." In Nanoparticles and their Biomedical Applications, 65–93. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-0391-7_3.

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Yung, Mana Man Na, Catherine Mouneyrac, and Kenneth Mei Yee Leung. "Ecotoxicity of Zinc Oxide Nanoparticles in the Marine Environment." In Encyclopedia of Nanotechnology, 1–17. Dordrecht: Springer Netherlands, 2014. http://dx.doi.org/10.1007/978-94-007-6178-0_100970-1.

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Conference papers on the topic "ZINC OXIDE NANOPARTICLE"

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Schwabe, Tobias, Axel Balke, Petrone Bezuidenhout, Julia Reker, Thorsten Meyers, Trudi-Heleen Joubert, and Ulrich Hilleringmann. "Oxygen detection with zinc oxide nanoparticle structures." In Fifth Conference on Sensors, MEMS, and Electro-Optic Systems, edited by Monuko du Plessis. SPIE, 2019. http://dx.doi.org/10.1117/12.2501507.

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Seil, Justin T., and Thomas J. Webster. "Zinc oxide nanoparticle and polymer antimicrobial biomaterial composites." In 2010 36th Annual Northeast Bioengineering Conference. IEEE, 2010. http://dx.doi.org/10.1109/nebc.2010.5458276.

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RUTHERFORD, David, Jaroslav JÍRA, Kateřina KOLÁŘOVÁ, Iva MATOLÍNOVÁ, Zdenek REMEŠ, Jaroslav KULIČEK, Dilli PADMANABAN, Paul MAGUIRE, Davide MARIOTTI, and Bohuslav REZEK. "Plasma-synthesised Zinc oxide nanoparticle behavior in liquids." In NANOCON 2021. TANGER Ltd., 2021. http://dx.doi.org/10.37904/nanocon.2021.4318.

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Saidi, S. A., M. H. Mamat, A. S. Ismail, M. M. Yusoff, M. F. Malek, N. D. Md Sin, A. S. Zoolfakar, Z. Khusaimi, and M. Rusop. "Effect of deposition speed on properties of zinc oxide nanoparticle decorated zinc oxide nanorod arrays." In 2016 IEEE Student Conference on Research and Development (SCOReD). IEEE, 2016. http://dx.doi.org/10.1109/scored.2016.7810066.

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Moratin, H., A. Scherzad, N. Kleinsasser, and S. Hackenberg. "Analysis of zinc oxide nanoparticle-induced mechanisms of toxicity." In Abstract- und Posterband – 90. Jahresversammlung der Deutschen Gesellschaft für HNO-Heilkunde, Kopf- und Hals-Chirurgie e.V., Bonn – Digitalisierung in der HNO-Heilkunde. Georg Thieme Verlag KG, 2019. http://dx.doi.org/10.1055/s-0039-1685640.

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Moreno, Gilbert, Steven J. Oldenburg, Seung M. You, and Joo H. Kim. "Pool Boiling Heat Transfer of Alumina-Water, Zinc Oxide-Water and Alumina-Water+Ethylene Glycol Nanofluids." In ASME 2005 Summer Heat Transfer Conference collocated with the ASME 2005 Pacific Rim Technical Conference and Exhibition on Integration and Packaging of MEMS, NEMS, and Electronic Systems. ASMEDC, 2005. http://dx.doi.org/10.1115/ht2005-72375.

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This investigation conducts pool boiling experiments under saturated conditions (Tsat = 60 °C) using nanofluids as the coolants. Three different nanofluids were tested including zinc oxide (ZnO)-water, aluminum oxide (Al2O3)-water and aluminum oxide (Al2O3)-water+ethylene glycol (ethylene glycol solution). At saturation (Tsat = 60°C), the pool boiling performance of the two pure water based nanofluids were similar. The maximum CHF enhancement as compared to the predicted Zuber’s [1] CHF evaluated at an equivalent saturation temperature is ∼180% for Al2O3-water nanofluids and ∼240% for ZnO-water nanofluids. In both cases, no degradation in the boiling heat transfer rate was observed for lower nanoparticle concentrations. However, higher nanoparticle concentrations demonstrate nucleate boiling heat transfer degradation at high heat fluxes. The dispersion of Al2O3 nanoparticles in various ethylene glycol solutions is also found to enhance CHF by as much as ∼130%. A significant difference in the diameter of individual grains/particles (27 ± 16.3 nm) and the volume weighted average diameter of particles in solution (155 ± 80 nm) indicates that the Al2O3-water nanofluids consist primarily of nanoparticle agglomerates. Gravimetric fractionation of the nanofluid produced nanofluids with particle/particle aggregate average diameters that ranged from 69–346 nm. Over the size range tested, there was no significant CHF dependence on the average particle diameter.
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Becker, Thales E., Fabio F. Vidor, Gilson I. Wirth, Thorsten Meyers, Julia Reker, and Ulrich Hilleringmann. "Time domain electrical characterization in zinc oxide nanoparticle thin-film transistors." In 2018 IEEE 19th Latin-American Test Symposium (LATS). IEEE, 2018. http://dx.doi.org/10.1109/latw.2018.8349695.

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Mulijani, Sri, Galang Rizky, Armi Wulanawati, Ayu Wuri Handayani, and Felah Nur Asih. "Synthesis of zinc oxide nanoparticle as corrosion resistance of steel metal." In THE 9TH INTERNATIONAL CONFERENCE OF THE INDONESIAN CHEMICAL SOCIETY ICICS 2021: Toward a Meaningful Society. AIP Publishing, 2022. http://dx.doi.org/10.1063/5.0103996.

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Niyuki, Ryo, Yoshie Ishikawa, Naoto Koshizaki, Takeshi Tsuji, Hideki Fujiwara, and Keiji Sasaki. "Realization of single-mode random lasing within a zinc oxide nanoparticle film." In 2013 Conference on Lasers and Electro-Optics Pacific Rim (CLEO-PR). IEEE, 2013. http://dx.doi.org/10.1109/cleopr.2013.6600473.

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Pearce, Ruth, Fredrik Soderlind, Alexander Hagelin, Per-Olov Kall, Rositza Yakimova, Anita Lloyd Spetz, Elin Becker, and Magnus Skoglundh. "Effect of water vapour on gallium doped zinc oxide nanoparticle sensor gas response." In 2009 IEEE Sensors. IEEE, 2009. http://dx.doi.org/10.1109/icsens.2009.5398276.

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Reports on the topic "ZINC OXIDE NANOPARTICLE"

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Gladfelter, Wayne L., David A. Blank, and Kent R. Mann. Monodispersed Zinc Oxide Nanoparticle-Dye Dyads and Triads. Office of Scientific and Technical Information (OSTI), June 2017. http://dx.doi.org/10.2172/1365392.

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Moormann, Garrett, and George Bachand. Biosynthesis of Zinc Oxide Nanoparticles using Fungal Filtrates. Office of Scientific and Technical Information (OSTI), August 2021. http://dx.doi.org/10.2172/1817833.

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