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Dissertations / Theses on the topic 'Znonps Zinc Oxide Nanoparticles'

Author: Grafiati
Published: 3 June 2025
Last updated: 31 July 2025

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1

Pokhrel, Lok R., and Phillip R. Scheuerman. "Ecological Risk Assessment of Zinc Oxide Nanoparticles." Digital Commons @ East Tennessee State University, 2012. https://dc.etsu.edu/etsu-works/2962.

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2

Pokhrel, Lok R., Brajesh Dubey, and Phillip R. Scheuerman. "Ecological Risk Assessment of Zinc Oxide Nanoparticles." Digital Commons @ East Tennessee State University, 2012. https://dc.etsu.edu/etsu-works/2951.

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3

Hancock, Jared M. "Formation and Analysis of Zinc Oxide Nanoparticles and Zinc Oxide Hexagonal Prisms and Optical Analysis of Cadmium Selenide Nanoparticles." BYU ScholarsArchive, 2013. https://scholarsarchive.byu.edu/etd/3867.

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In this dissertation, methods to synthesize ZnO are reported. First, zinc oxide nanoparticles were synthesized with small amounts of transition metal ions to create materials called dilute magnetic semiconductors (DMS). We employed a low temperature sol-gel method that produces ZnO nanoparticles of reproducible size and incorporates cobalt, nickel, and manganese ions into the nanoparticles. Conditions were controlled such that a range of amounts of Co, Ni, and Mn were incorporated. The incorporation was tracked by color changes in the white ZnO powder to blue for Co, green for Ni and yellow fo
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4

Lopes, Sílvia Ferreira. "Effect of zinc oxide nanoparticles in Daphnia magna." Master's thesis, Universidade de Aveiro, 2012. http://hdl.handle.net/10773/10258.

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Mestrado em Biologia Aplicada - Toxicologia e Ecotoxicologia<br>O rápido desenvolvimento da nanotecnologia com o consequente aumento na produção de nanopartículas e nanoprodutos oferece muitas oportunidades mas também muitos desafios. A nanotecnologia tem vindo a ser descrita como uma área multidisciplinar que visa desenvolver uma variedade de nanoparticulas para aplicações medicinais e industriais. As propriedades que trazem às nanoparticulas especial atenção – pequeno tamanho, elevada área de superfície e consequente elevado grau de reatividade – podem também torná-las potencialment
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5

Elhaj, Baddar Zeinah. "ENGINEERING ZINC OXIDE NANOPARTICLES TO BE USED AS NANOFERTILIZERS." UKnowledge, 2018. https://uknowledge.uky.edu/pss_etds/109.

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Zinc deficient soils, or soils with low Zn bioavailability, are widespread, which exacerbates Zn deficiency in human as crops grown on these soils have low Zn content. Often crop yields are also compromised. Fertilizers based on soluble Zn salts often have limited efficacy in such soils. In this research, we evaluate the performance of polymer coated and bare ZnO nanoparticles (NPs) in an attempt to overcome limitations of soluble Zn salts in alkaline soils. We first synthesized 20-30 nm bare ZnO NPs with different surface chemistries to impart colloidal stability to the particles. Bare ZnO we
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6

Hernández, Viezcas José Angel. "Toxicity of zinc oxide and cerium oxide nanoparticles to mesquite (Prosopis juliflora-velutina)." To access this resource online via ProQuest Dissertations and Theses @ UTEP, 2009. http://0-proquest.umi.com.lib.utep.edu/login?COPT=REJTPTU0YmImSU5UPTAmVkVSPTI=&clientId=2515.

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7

Johnson, Clint Edwin. "In vitro toxicity assessment of silver and zinc oxide nanoparticles." University of Western Australia. School of Biomedical, Biomolecular and Chemical Sciences, 2010. http://theses.library.uwa.edu.au/adt-WU2010.0119.

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Nanotoxicology is a nascent field of study concerned with the potential for nanotechnology to adversely impact human health or result in ecological damage. Nanomaterials can display unique physicochemical properties not present in the parent bulk material and it is these properties that may be a potential source of toxicity. There are a growing number of examples of nanomaterials functioning differently in biosystems compared to the parent bulk material. With the rapid growth of nanotechnology and increasing exposure of people to novel nanomaterials there is an urgent need to evaluate the toxi
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8

O'Rourke, Shona Aisling. "The environmental toxicology of zinc oxide nanoparticles to the oligochaete." Thesis, Heriot-Watt University, 2013. http://hdl.handle.net/10399/2681.

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This thesis investigated the potential toxicity of zinc oxide nanoparticles (NPs) and bulk particles (both with and without organic matter (HA)) to the Californian Blackworm, Lumbriculus variegatus. The NPs and bulk particles in this thesis were characterised using numerous techniques. ZnO NPs were found to be 91 (13364) nm (median (interquartile range)) and ZnO bulk particles were found to be 237 (322165) nm (median (interquartile range)) by TEM. In the acute behavioural study (96 hour), ZnO NPs had a dose-dependent toxic effect on the behaviour of the worms up to 10mg/L whereas the bulk had
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9

Fernando, Joseph F. S. "Crystal seeding and photochemistry of gold-zinc oxide hybrid nanoparticles." Thesis, Queensland University of Technology, 2016. https://eprints.qut.edu.au/101206/1/Joseph_Fernando_Thesis.pdf.

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This project investigated the synthesis of hybrid nanoparticles of gold and zinc oxide by using photodeposition and crystal seeding approach. The study extended our understanding of the factors that determine nanocrystal size, shape and ratio of gold and zinc oxide in the hybrid system. Control at this scale is important from a materials-engineering viewpoint and for technological applications such as nonlinear optics, photocatalysis and photovoltaics. This research found that nonlinear optical absorption of zinc oxide can be enhanced by several orders of magnitude by coupling zinc oxide nanop
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10

Shortell, Matthew P. "Zinc oxide quantum dot nanostructures." Thesis, Queensland University of Technology, 2014. https://eprints.qut.edu.au/76335/4/Matthew_Shortell_Thesis.pdf.

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Zinc oxide (ZnO) is one of the most intensely studied wide band gap semiconductors due to its many desirable properties. This project established new techniques for investigating the hydrodynamic properties of ZnO nanoparticles, their assembly into useful photonic structures, and their multiphoton absorption coefficients for excitation with visible or infrared light rather than ultraviolet light. The methods developed are also applicable to a wide range of nanoparticle samples.
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11

Sharma, Vyom. "An investigation into the mechanism of toxicity of zinc oxide nanoparticles." Thesis, University of Bradford, 2011. http://hdl.handle.net/10454/5421.

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The wide scale use of ZnO nanoparticles (NPs) in the world consumer market has resulted in likelihood of exposure to human beings. The present study was aimed to assess the in vitro and in vivo interactions of ZnO NPs in the mammalian system and to elucidate the possible mechanism of their toxicity. Our in vitro results using human epidermal cells (A431), primary human epidermal keratinocytes and human liver cells (HepG2) demonstrated that cells exposed to ZnO NPs exhibit a decrease in cell viability which was independent of NP dissolution. ZnO NPs also induced oxidative DNA damage as evidence
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12

Alasvand, Zarasvand Azita. "Comparative Analysis of Zinc Oxide Nanoparticles Induced Transcriptomic Responses in Arabidopsis." Thesis, North Dakota State University, 2019. https://hdl.handle.net/10365/31694.

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The impact that zinc oxide nanoparticles (ZnONP) have on plant physiological responses was evaluated by comparing gene expression changes after Arabidopsis thaliana plants were exposed to ZnONP, in comparison with ionic Zn2+ (ZnSO4) and non-treated controls. After treatment with ZnONP (concentration10 μg L−1), ionic Zn2+ (applied as ZnSO4 at a concentration of 19.7 μg/ L −1), expression analyses via RNA sequencing revealed that 369 genes were down regulated and 249 were upregulated (p < [FDR] 0.05, expression difference < 3). The downregulated genes in ZnONP treated seedlings compared to the Z
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13

Wallace, Rachel. "Physicochemical characterisation of zinc oxide nanoparticles for use in toxicity studies." Thesis, University of Leeds, 2013. http://etheses.whiterose.ac.uk/5899/.

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This thesis is focused on the detailed physicochemical characterisation of zinc oxide (ZnO) nanoparticles (NPs) intended for use in toxicological investigations. A characterisation protocol has been developed in order to determine detailed physicochemical characteristics of 5 ZnO NP samples, selected to investigate in in vitro toxicity assays. The characterisation protocol aims to establish the samples’ distribution of particle sizes, morphology, crystallinity, phase content, purity, surface composition, dispersion and solubility and as such includes the following techniques: inductively coupl
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14

Orchard, Katherine Lorraine. "The mild synthesis of zinc oxide nanoparticles and nanocomposites via hydrolysis of well-characterised zinc organometallics." Thesis, Imperial College London, 2011. http://hdl.handle.net/10044/1/17786.

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This thesis centres on the development of a clean, one step method for generating surface-functionalised zinc oxide (ZnO) nanoparticles for application in the synthesis of well-dispersed inorganic-organic nanocomposites. The nanoparticle synthesis method utilises the controlled hydrolysis of organometallic zinc compounds, employing diethylzinc as a bulk precursor and an alkylzinc carboxylate as a substoichiometric, secondary precursor to deliver the capping ligands. A series of ethylzinc carboxylate species were synthesised and studied by NMR spectroscopy (EtZn(OOCR); R = H, CH3, and (CH2)nCH3
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15

Hirschmann, Johannes [Verfasser], and Marcus [Akademischer Betreuer] Halik. "Electrical Characteristics of Functionalized Zinc Oxide Nanoparticles / Johannes Hirschmann. Gutachter: Marcus Halik." Erlangen : Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), 2014. http://d-nb.info/1054342687/34.

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16

Urban, Ben E. "Zinc Oxide Nanoparticles for Nonlinear Bioimaging, Cell Detection and Selective Cell Destruction." Thesis, University of North Texas, 2013. https://digital.library.unt.edu/ark:/67531/metadc271908/.

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Light matter interactions have led to a great part of our current understanding of the universe. When light interacts with matter it affects the properties of both the light and the matter. Visible light, being in the region that the human eye can "see," was one of the first natural phenomenon we used to learn about our universe. The application of fundamental physics research has spilled over into other fields that were traditionally separated from physics, being considered two different sciences. Current physics research has applications in all scientific fields. By taking a more physical ap
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17

Wilkinson, John Henry. "Picosecond time-resolved photoluminescence of zinc oxide single crystals, films and nanoparticles /." Electronic thesis, 2003. http://etd.wfu.edu/theses/available/etd-09162005-083525/.

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18

Young, Michael I. "Synthesis of zinc oxide nanoparticles with different morphologies by wet chemistry routes." Thesis, Loughborough University, 2016. https://dspace.lboro.ac.uk/2134/25368.

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The objectives of this project were to synthesise semi-conducting ceramic nanoparticles including zinc oxide (ZnO) and aluminium doped zinc oxide (AZO) through a wet chemistry route to obtain nanoparticles with a controlled size and morphology. Wet chemistry methods (co-precipitation method and hydrothermal method) were used to synthesise ZnO and AZO particles. In the synthesis, various compounds and morphologies were synthesised. ZnO, Zn(OH)2 and unknown phases were co-precipitated, with only ZnO obtained following hydrothermal treatment. Morphologies ranging from platelets, flower-like, nano
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19

Pokhrel, Lok R., Brajesh Dubey, and Phillip R. Scheuerman. "Developmental Phytotoxicity of Silver and Zinc Oxide Nanoparticles to the Crop Plants." Digital Commons @ East Tennessee State University, 2012. https://dc.etsu.edu/etsu-works/2950.

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20

Allard, Garvin Richard Johan. "Synthesis and characterization of zinc-doped magnetic nanoparticles for diagnostic studies." University of the Western Cape, 2015. http://hdl.handle.net/11394/4815.

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Magister Scientiae - MSc<br>In the present study we report the synthesis and characterization of iron oxide magnetic nanoparticles doped with zinc in an attempt to enhance the magnetic properties. The nanoparticles were prepared via the co-precipitation route and capped with 3-phosphonopropionic acid (3-PPA). The amount of zinc dopant was varied to yield nanoparticles with the general formula ZnxFe3-xO4 (x=0, 0.1, 0.2, 0.3, 0.4). Characterization was carried out using high resolution transmission electron microscopy (HRTEM), X-ray diffraction spectroscopy (XRD), energy-dispersive X-ray spectro
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21

Deka, Priyanka. "The Effect of Zinc Oxide Nanoparticles on Plants, and on Host-Pathogen Interactions." Diss., North Dakota State University, 2019. https://hdl.handle.net/10365/29270.

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Zinc oxide nanoparticles (ZnO NPs) are a type of engineered nanomaterial that is currently being explored for use in different aspects of agriculture. So far, research on this area is limited to evaluating the phenotypical responses of plants to a high concentration of the NPs which is realistically not feasible in the actual environment. This research aims to investigate the molecular-level interactions between ZnO NPs and plants, together with another significant component of the environment, a fungal plant pathogen. Prior to studying these molecular-level interactions, the uptake of ZnO NPs
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22

Lyimo, Germana Vincent. "Green synthesised Zinc Oxide Nanoparticles and their antifungal effect on Candida albicans Biofilms." University of Western Cape, 2020. http://hdl.handle.net/11394/7606.

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Magister Scientiae Dentium - MSc(Dent)<br>Candida albicans is a clinical fungal isolate that is most frequently isolated from different host niches, and is implicated in the pathogenesis of several fungal infections, including oral candidiasis. The pathogenesis and antifungal resistance mechanisms of Candida species are complex and involve several pathways and genes. Oral candidiasis incidence rates are rapidly increasing, and the increase in resistance to conventional antifungals has led to the need to develop innocuous and more efficacious treatment modalities. The purpose of this stud
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23

Liu, Yang Li Men`gshi. "Study of antimicrobial activity and mechanism of zinc oxide nanoparticles against foodborne pathogens." Diss., Columbia, Mo. : University of Missouri-Columbia, 2009. http://hdl.handle.net/10355/6718.

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The entire thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file; a non-technical public abstract appears in the public.pdf file. Title from PDF of title page (University of Missouri--Columbia, viewed on March 23, 2010). Thesis advisor: Dr. Mengshi Lin. Includes bibliographical references.
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24

Pokhrel, Lok R., Brajesh Dubey, and Phillip R. Scheuerman. "Potential Developmental Toxicity of Silver and Zinc Oxide Nanoparticles to the Terrestrial Plants." Digital Commons @ East Tennessee State University, 2012. https://dc.etsu.edu/etsu-works/2952.

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25

Ntozakhe, Luyolo. "Synthesis of modified zinc oxide nanoparticles using pneumatic spray pyrolysis for solar cell application." Thesis, University of Fort Hare, 2017. http://hdl.handle.net/10353/5862.

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In this work, the pneumatic spray pyrolysis was used to synthesize un-doped and carbon doped zinc oxide (ZnO) nanoparticles. The zinc acetate, tetrabutylammonium bromide and ethanol were used as starting materials for the desired ZnO nanoparticles and the prepared samples were annealed at 400 oC in the furnace. The as synthesized un-doped and carbon doped ZnO NPs were evaluated using X-ray diffraction (XRD), Scanning electron microscope (SEM), Energy dispersive x-ray spectroscopy (EDX), High-resolution transmission electron microscopy (HRTEM), Raman spectroscopy (RS) and Ultraviolet-visible sp
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26

Tshoko, Siphokazi. "Spectroelectrochemical graphene-silver/zinc oxide nanoparticulate phenotype biosensors for ethambutol and pyrazinamide." University of the Western Cape, 2019. http://hdl.handle.net/11394/6842.

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>Magister Scientiae - MSc<br>Tuberculosis (TB), a deadly disease second to HIV/AIDS, is a global health problem. Diagnosis of active tuberculosis is tedious and requires expensive procedures since there is no recognizable method for sole detection of active TB. Although this is a deadly disease, treatment drug toxicity is also an issue that also causes fatalities in diagnosed patients. Therefore, a rapid sensitive and specific diagnostic method is imperative for TB drug management. In this study spectroscopic and/or electrochemical biosensors were developed for the detection and quantifi
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27

Scown, Tessa M. "Uptake and effects of nanoparticles in fish." Thesis, University of Exeter, 2009. http://hdl.handle.net/10036/93696.

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Nanotechnology is a rapidly growing industry of global economic importance, with new technologies exploiting the novel characteristics of materials manufactured at the nanoscale being developed for use within the biomedical, electronic, energy production and environmental sectors. The unusual properties of engineered nanomaterials (ENMs) that make them useful in such applications have led to concerns regarding their potential impact on the environment. The aquatic environment is particularly at risk of exposure to ENPs, yet, there is currently little known about their behaviour in aquatic syst
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28

Windiasti, Gracia. "Investigating the synergistic antimicrobial effect of carvacrol and zinc oxide nanoparticles against Campylobacter jejuni." Thesis, University of British Columbia, 2016. http://hdl.handle.net/2429/60248.

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Foodborne illness is a growing concern world-wide, and Campylobacter in particular has been reported to cause approximately 145,000 foodborne illness cases every year in Canada. A recent annual report from the Canadian Integrated Program for Antimicrobial Resistance Surveillance reveals an increasing trend of antibiotic-resistant Campylobacter isolated from poultry sources across Canada. The large number of foodborne illnesses and emergence of the resistant strains of Campylobacter pose a serious threat in the agri-food industry. Hence, there is increasing urgency to find alternatives to conve
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29

Heim, Julia [Verfasser]. "Analysis of zinc oxide nanoparticles as a potential mutagen of respiratory epithelia / Julia Heim." Mainz : Universitätsbibliothek Mainz, 2015. http://d-nb.info/1078638187/34.

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30

BENGALLI, ROSSELLA DANIELA. "In vitro models of the respiratory barrier: a case study on zinc oxide nanoparticles." Doctoral thesis, Università degli Studi di Milano-Bicocca, 2015. http://hdl.handle.net/10281/69760.

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Background: In the last decade, nanoparticles (NPs) have brought a huge revolution in the many fields, especially in toxicology studies. Their small size (diameter lower than 100 nm) consent them to have unique chemical and physical properties, which, besides their positive impact in industrial use, may induce adverse health effects too. The production and the emission of zinc oxide nanoparticles (nZnO) is highly increased during the last years, for their industrial, cosmetic, anti-microbial and biomedical applications. Several in vitro and in vivo studies have shown that nZnO are toxic to dif
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31

Van, Zandt Nicholas L. "Aqueous Fabrication of Pristine and Oxide Coated ZnSe Nanoparticles." Wright State University / OhioLINK, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=wright1623356039586297.

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32

Mgwili, Phelisa Yonela. "Graphenated organic nanoparticles immunosensors for the detection of TB biomarkers." University of the Western Cape, 2017. http://hdl.handle.net/11394/6355.

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Magister Scientiae - MSc (Chemistry)<br>Pulmonary Tuberculosis (TB) a disease second to HIV/AIDS is a global health problem that arises in two states; as an active state and as a latent state. Diagnosis of active TB is tedious and requires expensive procedures since there is no recognizable method for the sole detection of active TB. The current diagnosis consists of chest X-rays and multiple sputum cultures used for acid-fast bacilli detection. The TB diagnosis of children is particularly difficult which further complicates the diagnosis. Thus, rapid identification of this pathogen is importa
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33

English, Michael David. "Gold coating of silica and zinc oxide nanoparticles by the surface reduction of gold(I) chloride." Thesis, Queensland University of Technology, 2012. https://eprints.qut.edu.au/51084/1/Michael_English_Thesis.pdf.

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The possibility of a surface inner sphere electron transfer mechanism leading to the coating of gold via the surface reduction of gold(I) chloride on metal and semi-metal oxide nanoparticles was investigated. Silica and zinc oxide nanoparticles are known to have very different surface chemistry, potentially leading to a new class of gold coated nanoparticles. Monodisperse silica nanoparticles were synthesised by the well known Stöber protocol in conjunction with sonication. The nanoparticle size was regulated solely by varying the amount of ammonia solution added. The presence of surface hy
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34

Bolyard, Stephanie Carbone. "Fate of Coated Zinc Oxide in Municipal Solid Waste Landfills." Master's thesis, University of Central Florida, 2012. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/5133.

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Given the increase in nanomaterial (NM) use in consumer products and the large fraction of waste placed in landfills worldwide, the probability of these products reaching municipal solid waste (MSW) landfills at the end of their useful life is high. Since nanotechnology use is still in its early stages, there are currently no regulations pertaining to the disposal of NMs and their fate in MSW landfills is still unknown. Understanding the fate of NMs in MSW landfills is vital to ensure the proper handling of these novel materials from cradle to grave; such research will provide information on h
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35

Nethavhanani, Takalani. "Synthesis of zinc oxide nanoparticles by a green process and the investigation of their physical properties." University of the Western Cape, 2017. http://hdl.handle.net/11394/6295.

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Magister Scientiae - MSc (Physics)<br>Zinc oxide (ZnO) is a wide and direct semiconductor with a wurtzite crystal structure. Its multifunctionality as the ideal candidate in applications such as blue-UV light emitting diodes, transparent conducting oxide, selective gas sensor and efficient catalyst support among others, has attracted a significant interest worldwide. Nano-scaled ZnO has been synthesized in a plethora of shapes. A rich variety of physical and chemical methodologies have been used in the synthesis of undoped or doped ZnO. However, such methods either necessitate relatively
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36

ANCONA, ANDREA. "Ultrasound-induced Reactive Oxygen Species generation by Zinc Oxide Nanostructures: Mechanisms and Applications." Doctoral thesis, Politecnico di Torino, 2020. http://hdl.handle.net/11583/2823940.

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37

Tejpal, Jyoti. "The use of metal and metal oxide nanoparticles against biofilms." Thesis, De Montfort University, 2016. http://hdl.handle.net/2086/13114.

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The persistence of biofilms in hospital settings are associated with Healthcare Associated Infections (HCAI), causing increased morbidity, mortality and healthcare costs. The resistance of biofilms against commonly used hospital disinfectants has been well reported. Metal and metal oxide nanoparticles (NP) such as silver (Ag), copper (Cu), zinc oxide (ZnO) and copper oxide (CuO) exhibit antimicrobial properties against various pathogens. Methods: Biofilm formation of Pseudomonas aeruginosa and Staphylococcus aureus in a Centre for Disease Control (CDC) biofilm reactor and a 96 well plate was c
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38

Olenych, I. B., O. I. Aksimentyeva, and Yu Yu Horbenko. "Electrical Properties of Hybrid Composites Based on Poly(3,4-ethylenedioxythiophene) with ZnO and Porous Silicon Nanoparticles." Thesis, Sumy State University, 2015. http://essuir.sumdu.edu.ua/handle/123456789/42552.

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The electrical properties of hybrid nanosystem based on poly(3,4 ethylenedioxythiophene) with ZnO and porous silicon nanoparticles were studied by the methods of current-voltage characteristics and thermally stimulated conductivity. The dependence of electrical parameters of hybrid films on their composition has been found. The analysis of the temperature dependences of the composites conductivity in the temperature range of 80-330 К indicates the activation character of charge transfer and presence the trapping of unequilibrium carriers at the porous silicon and ZnO nanoparticle – polymer int
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39

Pandey, Bimal. "Synthesis, Characterization, Structural, and Optical Properties of Zinc Oxide Nanostructures Embedded in Silicon Based Substrates." Thesis, University of North Texas, 2014. https://digital.library.unt.edu/ark:/67531/metadc500222/.

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Structural and optical properties of ZnO nanostructures synthesized by low energy ion implantation technique were examined. ZnO molecular ions were implanted into Si/SiO2 substrates at room temperature and then furnace annealed under different temperatures and environments. In all as-implanted samples only Zn nanostructures with varying diameters distributed into the Si/SiO2 matrices were observed. No trace of ZnO was found. The distributions of Zn nanostructures in Si/SiO2 closely matched results from Stopping and Range of Ions in Matter (SRIM) simulations. During annealing at 750 oC, Zn dif
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John, Sween Vaidyanathan Vijay Varadarajan. "A study of the synthesis and surface modification of UV emitting zinc oxide for bio-medical applications." [Denton, Tex.] : University of North Texas, 2009. http://digital.library.unt.edu/permalink/meta-dc-10990.

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41

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 efficien
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42

Hakat, Yasemin. "Studies on the Preparation, Immobilization, and Luminescence Properties of Zinc Oxide (ZnO)Quantum Dots." Digital Commons @ East Tennessee State University, 2012. https://dc.etsu.edu/etd/1406.

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Quantum dots are a part of very important our technological future because of their intriguing and useful properties. These properties are different in character from those of the corresponding bulk material. Quantum dots are inorganic artificial semiconductor nanocrystal whose electrons influence their physical and chemical properties. Zinc oxide quantum dots were synthesized through an ethanol based precipitation via colloidal synthesis method at various pH values. Various emission colors were obtained because the excited quantum dots of various sizes emitted specific wavelengths of light. T
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43

Nadarajah, Athavan. "Fundamental Properties of Functional Zinc Oxide Nanowires Obtained by Electrochemical Method and Their Device Applications." PDXScholar, 2012. https://pdxscholar.library.pdx.edu/open_access_etds/633.

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We report on the fundamental properties and device applications of semiconductor nanoparticles. ZnO nanowires and CdSe quantum dots were used, prepared, characterized, and assembled into novel light-emitting diodes and solar cells. ZnO nanowire films were grown electrochemically using aqueous soluble chloride-based electrolytes as precursors at temperatures below 90° C. Dopants were added to the electrolyte in the form of chloride compounds, which are AlCl3, CoCl2, CuCl2, and MnCl2. The optical, magnetic, and structural properties of undoped and transition-metal-ion doped ZnO nanowires were ex
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44

Juan, Hung-Tzu, and 阮泓慈. "1.Lung Toxicity with Zinc Oxide Nanoparticles: Study of Zinc Ion2.Subchronic Toxicity of Zinc Oxide Nanoparticles by Inhalation in Rats." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/50475277111580798855.

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碩士<br>國立臺灣大學<br>職業醫學與工業衛生研究所<br>99<br>part1 Zinc oxide nanoparticles have been widely used in the manufacturing for ceramics, chemicals, cosmetics, pharmaceuticals and pesticides. Previous studies have shown that the toxicity of non-soluble nanoparticles is linked with particle size and surface area. Zinc oxide nanoparticls can be dissolved in liquid and the toxicity is resulted from zinc ions in in vitro studies. However, it is not clear about the role of zinc ion in animal studies. Several methods to detect zinc ions have been used, but yet not clearly validated. In this study, we developed
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45

Lai, Jing-Yuan, and 賴璟源. "Manufacture of Zinc Oxide Nanoparticles from Zinc Acetate by Calcination." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/6f8q43.

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碩士<br>國立臺北科技大學<br>化學工程與生物科技系化學工程碩士班<br>106<br>Calcination, also known as calcining, is a heating process of minerals or other solid materials. It can make some ingredients of the material cause thermal dissociation, phase change or getting rid off volatile ingredients. Usually, the highest temperature of the heating process won’t exceed melting point of the material. In this study, zinc oxide was produced by calcination. The precursor of the experiment is zinc acetate. Then, adding different volume of Sodium hydroxide to cause precipitation reaction, which can change the pH value at the sa
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Lin, Ruey-Chang, and 林睿昌. "Cytotoxicity study of zinc oxide hybrid nanoparticles." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/97tb63.

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碩士<br>國立臺北科技大學<br>生物科技研究所<br>100<br>In the present days, nanotech-based consume products are widespread and sophisticated. However, the size of nanoparticle is similar to the sub-cell structures so that it may lead to severe reactions with the cells which are potentially hazard to the environment and the organisms. It is urgent and necessary to deeply investigate the interactions between nanoparticle and cell. In this study, Zinc oxide nanoparticle (ZnO), zinc oxide/silicon dioxide composite nanoparticle (ZnO/SiO2), zinc oxide nanoparticle coated with polyethylene glycols (ZnO/PEG) and zinc ox
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Sunyani, M. "Synthesis and characterization of zinc oxide nanoparticles." Thesis, 2014. http://ethesis.nitrkl.ac.in/5832/1/E-43.pdf.

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In the present work, pure zinc oxide nanoparticles (ZnO) were successfully synthesized by a precipitation method using zinc acetate dehydrate and sodium hydroxide as the precursor materials. The as-prepared precursor was calcined at 500°C and 800°C temperatures for 2h. The samples were characterized by X-ray diffraction (XRD). The XRD spectra indicate that the ZnO crystal has a hexagonal wurtzite structure. Different compositions of zinc/iron oxides nanocomposites will be synthesized and characterized using XRD, IR, SEM, UV-Vis, and PL studies. The prepared nanocomposites will also be applied
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Huang, Kai-Lin, and 黃凱麟. "Preparation of zinc oxide nanoparticles using natural polysaccharide." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/69610460726524007853.

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碩士<br>國立中央大學<br>環境工程研究所<br>98<br>Preparation of ZnO nanoparticles using polysaccharides is less equipment demanding, and cheap approach. In this study, the environmentally friendly chitosan, sodium alginate, starch and other natural polysaccharides were useal. to prepare the ZnO having metal salt of organic zinc polymers. Polysaccharides and absorption of zinc metal chelating are important factors in the preparation of ZnO. This study for the preparation of ZnO using polysaccharides by alkaline etherification, indicated that the temperature of ether sodium chloroacetate concentration and t
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Carvalho, José Tiago Macedo de. "Field-effect transistors based on Zinc oxide nanoparticles." Master's thesis, 2015. http://hdl.handle.net/10362/16391.

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This work reports the development of field-effect transistors (FETs), whose channel is based on zinc oxide (ZnO) nanoparticles (NPs). Using screen-printing as the primary deposition technique, different inks were developed, where the semiconducting ink is based on a ZnO NPs dispersion in ethyl cellulose (EC). These inks were used to print electrolyte-gated transistors (EGTs) in a staggered-top gate structure on glass substrates, using a lithium-based polymeric electrolyte. In another approach, FETs with a staggered-bottom gate structure on paper were developed using a sol-gel method to functi
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"Control of hydrogen sulphide emissions using zinc oxide nanoparticles." Thesis, 2014. http://hdl.handle.net/10388/ETD-2014-07-1621.

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Emission of hazardous gases such as hydrogen sulphide (H2S) by a variety of industrial processes and as a result of agricultural activities has become an issue of great concern over the years. The control of these gases is needed to ensure public safety, to protect the environment, and lastly to comply with occupational and environmental regulations. Several techniques including biological and physicochemical methods have been applied to remove these gases from contaminated air streams. In this work, Zinc oxide (ZnO) nanoparticles were used to adsorb H2S gas at ambient temperatures. The effec
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