Gotowe bibliografie tematyczne / ZnO based Nanocomposites

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Gotowa bibliografia na temat „ZnO based Nanocomposites”

Autor: Grafiati

Data publikacji: 7 września 2023

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Artykuły w czasopismach na temat "ZnO based Nanocomposites"

Kannan, Karthik, Mostafa H. Sliem, Aboubakr M. Abdullah, Kishor Kumar Sadasivuni i Bijandra Kumar. "Fabrication of ZnO-Fe-MXene Based Nanocomposites for Efficient CO2 Reduction". Catalysts 10, nr 5 (15.05.2020): 549. http://dx.doi.org/10.3390/catal10050549.

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A ZnO-Fe-MXene nanocomposite was fabricated and examined with diverse spectroscopic techniques. The hexagonal structure of ZnO, MXene, and ZnO-Fe-MXene nanocomposites were validated through XRD. FTIR showed the characteristic vibrational frequencies of ZnO and MXene. The micrographs of the SEM showed nanoparticles with a flower-like structure. The electrocatalytic reduction efficiency of ZnO-Fe-MXene nanocomposite was analyzed through cyclic voltammetry and electrochemical impedance spectroscopy methods. The ZnO-Fe-MXene electrode was confirmed to have a high current density of 18.75 mA/cm2 under a CO2 atmosphere. Nyquist plots also illustrated a decrease in the impedance of the ZnO-Fe-MXene layer, indicating fast charge transfer between the Zn and MXene layers. Additionally, this electrochemical study highlights new features of ZnO-Fe-MXene for CO2 reduction.

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Kaur, Daljeet, Amardeep Bharti, Tripti Sharma i Charu Madhu. "Dielectric Properties of ZnO-Based Nanocomposites and Their Potential Applications". International Journal of Optics 2021 (22.07.2021): 1–20. http://dx.doi.org/10.1155/2021/9950202.

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Energy storage devices constitute one of the research areas in recent years. Capacitors are commonly used for the storage of electrical energy. The current research is focusing on not only the improvement in energy density but also the materials which are environment friendly. Polymer composites are known to be technically essential materials owing to their wide range of applications. Enormous research has been devoted to zinc oxide- (ZnO-) based polymer nanocomposites, due to their extraordinary dielectric properties. This review article presents a detailed study of the dielectric properties of ZnO-based nanocomposites. The dielectric constant study includes the effect of transition metals and rare earth metals as a dopant in ZnO. This review gives an insight into the mechanism responsible for the variation of dielectric constant in ZnO nanocomposites due to various factors like size of nanoparticles, thickness of the thin film, operating frequency, doping concentration, and atomic number. The observations have been summarized to convey the mechanism and structural changes involved in the ZnO nanocomposites to the researchers. The deployment of biodegradable nanocomposite materials is expected to open an innovative way for their outstanding electronic applications as storage materials.

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Su, Li Fen, Lei Miao i Sakae Tanemura. "ZnO/SiO₂ Nanocomposite Cryogels Prepared by Vacuum Freeze Drying". Materials Science Forum 663-665 (listopad 2010): 1242–46. http://dx.doi.org/10.4028/www.scientific.net/msf.663-665.1242.

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In recent years, ZnO/SiO2 nanocomposite thin films have attracted much attention for a wide range of device applications based on their specific optical and electrical properties. Traditionally, the ZnO/SiO2 nanocomposites were prepared at the form of thin film because the ZnO/SiO2 nanocomposite gels are difficult to synthesize. Therefore, in the present study, a novel route of the mixed ZnO/SiO2 nanocomposite cryogels were prepared by sol-gel technology and dried by vacuum freeze drying. The wet gels were synthesized by co-precursor method with the precursors containing tetraethoxysilane [Si(OC2H5)4,TEOS] and zinc acetate [Zn(CH3COO)2.2H2O]. After vacuum freeze drying, the nanocomposites were annealed at different temperature. The properties of the resulting ZnO/SiO2 nanocomposite cryogels were characterized using Scanning Electron Microscopy (SEM), nitrogen absorption/desorption isotherms, thermogravimetric and differential scanning calorimeter (TG-DSC).

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Al Haiqi, Omer, Abdurahman Hamid Nour, Bamidele Victor Ayodele i Rushdi Bargaa. "Interaction Effect of Process Variables on Solar-Assisted Photocatalytic Phenol Degradation in Oilfield Produced Water Over ZnO/Fe2O3 Nanocomposites". Journal of Advanced Research in Fluid Mechanics and Thermal Sciences 78, nr 1 (1.12.2020): 100–121. http://dx.doi.org/10.37934/arfmts.78.1.100121.

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This study investigates the interaction effects of process variables on photocatalytic phenol degradation in oil produce water. A series of ZnO/Fe2O3 nanocomposite prepared using the sol-gel method and calcined at a temperature range of 400-600 oC were employed as photocatalysts. The characterization analysis using different instrument techniques revealed that the ZnO/Fe2O3 nanocomposites have suitable physicochemical properties as photocatalysts. The photocatalytic activity of the ZnO/Fe2O3 nanocomposite was examined in photo-reactor considering the degradation of the phenol and the reduction in chemical oxygen demand (COD) in the oilfield produced water under direct sunlight. It was ascertained that process variables such as irradiation time, calcination temperature of the ZnO/Fe2O3 nanocomposites, and the ZnO/Fe2O3 nanocomposites concentration significantly influenced the chemical oxygen demand and phenol removal. Based on the analysis of variance (ANOVA), the effects of the process variables on the phenol and COD removal can be ranked as irradiation time (p-value < 0.0001) > calcination temperature of the ZnO/Fe2O3 nanocomposite (p-value = 0.0003) > ZnO/Fe2O3 concentration (p-value = 0.0013). The interaction between the parameters was observed to have a substantial effect on COD and phenol removal. However, the interaction effect that produced the most significant influence on the COD and phenol removal was recorded between the irradiation time and the ZnO/Fe2O3 nanocomposite concentration.

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Fakoori, Elham, Hassan Karami i Azizollah Nezhadali. "Synthesis and characterization of binary and ternary nanocomposites based on TiO2, SiO2 and ZnO with PVA based template-free gel combustion method". Materials Science-Poland 37, nr 3 (1.09.2019): 426–36. http://dx.doi.org/10.2478/msp-2019-0051.

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AbstractBinary and ternary nanocomposites based on TiO2, SiO2 and ZnO were synthesized by PVA-based template-free gel combustion method. The morphology and the particles sizes of the synthesized samples depended on some parameters including the initial concentrations of metal salts and PVA amount in the sol, solvent composition and solution pH. Effects of these parameters were investigated and optimized by using the Taguchi method. In the experimental design, the Taguchi L25 array was used to investigate six factors at five levels. The samples were characterized by dynamic light scattering (DLS), transmission electron microscopy (TEM), Brunauer-Emmett-Teller (BET) specific surface areas, scanning electron microscopy (SEM). The obtained results showed that the present method can be used to synthesize TiO2/SiO2/ZnO ternary nanocomposite with an effective surface area of 0.3 m2 · g−1 and ZnO/TiO2, TiO2/SiO2, ZnO/SiO2 binary nanocomposites with an effective surface area of 234 m2 · g−1, 6 m2 · g−1 and 0.5 m2 · g−1, respectively. The ZnO/TiO2 nanocomposite which was synthesized under the following experimental conditions: 2.5 wt.% Zn salt, 2.5 wt.% Ti salt, 2.0 wt.% PVA, pH = 1 and ethanol:water ratio 30:70 was selected by the Taguchi method as an optimum sample with the smallest particles (average diameter = 50 nm).

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Farha, Ashraf H., Abdullah F. Al Naim i Shehab A. Mansour. "Thermal Degradation of Polystyrene (PS) Nanocomposites Loaded with Sol Gel-Synthesized ZnO Nanorods". Polymers 12, nr 9 (27.08.2020): 1935. http://dx.doi.org/10.3390/polym12091935.

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Thermal degradation of polystyrene/ZnO (PS/ZnO) nanocomposites was investigated in this study. PS/ZnO polymer nanocomposites were prepared by using ZnO nanorods as nanofillers that were prepared via the sol-gel route. The as-prepared ZnO nanoparticles showed nanocrystallites in rod-like shapes with a non-uniform hexagonal cross-section and diameter varying from 40 to 75 nm. PS/ZnO nanocomposites with ZnO nanoparticles content ranging from 0–3 wt% are prepared via the common casting method. Even dispersion for ZnO nanoparticles within as-prepared PS/ZnO nanocomposites was verified through SEM/EDX measurements. Thermal degradation of the samples was checked by using the thermogravimetric (TG) analysis and differential scanning calorimetry (DSC) under non-isothermal conditions and a constant heating rate of 10 °C min. The thermal stability of the nanocomposite is elevated compared to that of pristine PS due to the addition of the ZnO nanoparticles. The homogeneity of the PS/ZnO nanocomposites is verified by systematic increases in thermal degradation with increasing ZnO content. The characterization degradation temperatures at different weight loss percentages of ZnO nanoparticles increase at high ZnO wt%. Static activation energy of decomposing is based on TGA data. Activation energies showed some enhancement after the addition of ZnO nanorods into the PS matrix. Enhancing the thermal stability of PS with ZnO addition within the investigated ZnO concentration range is verified by TG, DSC results.

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Miao, Yuxin, Guofeng Pan, Caixuan Sun, Ping He, Guanlong Cao, Chao Luo, Li Zhang i Hongliang Li. "Enhanced photoelectric responses induced by visible light of acetone gas sensors based on CuO-ZnO nanocomposites at about room temperature". Sensor Review 38, nr 3 (18.06.2018): 311–20. http://dx.doi.org/10.1108/sr-08-2017-0158.

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PurposeThe purpose of this paper is to study the effect of doping, annealing temperature and visible optical excitation on CuO-ZnO nanocomposites’ acetone sensing properties and introduce an attractive candidate for acetone detection at about room temperature.Design/methodology/approachZnO nanoparticles doped with CuO were prepared by sol-gel method, and the structure and morphology were characterized via X-ray diffraction, scanning electron microscope, energy dispersive spectroscopy and Brunauer-Emmett-Teller. The photoelectric responses of CuO-ZnO nanocomposites to cetone under the irradiation of visible light were investigated at about 30°C. The photoelectric response mechanism was also discussed with the model of double Schottky.FindingsThe doping of CuO enhanced performance of ZnO nanoparticles in terms of the photoelectric responses and the gas response and selectivity to acetone of ZnO nanoparticles, in addition, decreasing the operating temperature to about 30ºC. The optimum performance was obtained by 4.17% CuO-ZnO nanocomposites. Even at the operating temperature, about 30ºC, the response to 1,000 ppm acetone was significantly increased to 579.24 under the visible light irradiation.Practical implicationsThe sensor fabricated by 4.17% CuO-ZnO nanocomposites exhibited excellent acetone-sensing characteristics at about 30ºC. It is promising to be applied in low power and miniature acetone gas sensors.Originality/valueIn the present research, a new nanocomposite material of CuO-ZnO was prepared by Sol-gel method. The optimum gas sensing properties to acetone were obtained by 4.17% CuO-ZnO nanocomposites at about 30ºC operating temperature when it was irradiated by visible light with the wavelength more than 420 nm.

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Alkaim, Ayad F., Firas H. Abdulrazzak, Shaimaa M. Essa, Usama S. Altimari, Montather F. Ramadan i Aseel M. Aljeboree. "Methacrylic Acid-Acrylamide based ZnO Hydrogel Nanocomposite Assisted Photocatalytic Decolorization of Methylene Blue Dye". INTERNATIONAL JOURNAL OF PHARMACEUTICAL QUALITY ASSURANCE 14, nr 02 (25.06.2023): 279–82. http://dx.doi.org/10.25258/ijpqa.14.2.06.

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In this research, preparation of methacrylic acid-acrylamide based ZnO hydrogel nanocomposite (MAA-AM)/ZnO hydrogel nanocomposite by way of co-polymerization via used acrylate acid (AA) (or acrylate salt) (AA) or methacrylic acid (MAA)) and acrylamide (AM). Nanocomposites based on acrylate are characterized via being hydrophilic and able to retain water. Nanocomposite properties were studied using different techniques (FE-SEM, TEM, and EDX). The photocatalytic degradation of methylene blue MB dye under different conditions was studied using nanocomposite like time of irradiation, mass of catalyst (MAA- AM)/ZnO hydrogel nanocomposite, initial MB dye concentration onto photocatalytic degradation and reactivation were studied. The result increases the photocatalytic degradation with the rise weight of catalyst (MAA- AM)/ZnO hydrogel nanocomposite range (0.1–0.25 g). Too, a decrease in photocatalytic degradation was observed with an increase in MB. Observed that after reuse, ((MAA- AM)/ZnO) nanocomposite hydrogel appear photocatalytic efficiency from of the use 1 to 6 cycle 87.88 to 58.87%, showing that ((MAA- AM)/ZnO hydrogel nanocomposite surface appear good stability.

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Venkidusamy, Vasanthi, Sivanantham Nallusamy, Gopalakrishnan Nammalvar, Ramakrishnan Veerabahu, Arun Thirumurugan, Chidhambaram Natarajan, Shanmuga Sundar Dhanabalan, Durga Prasad Pabba, Carolina Venegas Abarzúa i Sathish-Kumar Kamaraj. "ZnO/Graphene Composite from Solvent-Exfoliated Few-Layer Graphene Nanosheets for Photocatalytic Dye Degradation under Sunlight Irradiation". Micromachines 14, nr 1 (12.01.2023): 189. http://dx.doi.org/10.3390/mi14010189.

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ZnO/graphene nanocomposites were prepared using a facile approach. Graphene nanosheets were prepared by ultrasonication-based liquid phase exfoliation of graphite powder in a low boiling point organic solvent, 1,2-Dichloroethane, for the preparation of ZnO/graphene nanocomposites. Structural properties of the synthesized ZnO/graphene nanocomposites were studied through powder XRD and micro-Raman analysis. The characteristic Raman active modes of ZnO and graphene present in the micro-Raman spectra ensured the formation of ZnO/graphene nanocomposite and it is inferred that the graphene sheets in the composites were few layers in nature. Increasing the concentration of graphene influenced the surface morphology of the ZnO nanoparticles and a flower shape ZnO was formed on the graphene nanosheets of the composite with high graphene concentration. The efficiencies of the samples for the photocatalytic degradation of Methylene Blue dye under sunlight irradiation were investigated and 97% degradation efficiency was observed. The stability of the nanocomposites was evaluated by performing five cycles, and 92% degradation efficiency was maintained. The observed results were compared with that of ZnO/graphene composite derived from other methods.

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Morici, Elisabetta, Rossella Arrigo i Nadka Tz Dintcheva. "On the role of multi-functional polyhedral oligomeric silsesquioxane in polystyrene-zinc oxide nanocomposites". Journal of Polymer Engineering 35, nr 4 (1.05.2015): 329–37. http://dx.doi.org/10.1515/polyeng-2014-0212.

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Abstract Multi-functional trisilanol phenyl (TSPH) and trisilanol isobutyl (TSIB) polyhedral oligomeric silsesquioxane (POSS) have been used in the formulation of advanced polystyrene (PS)-zinc oxide (ZnO) nanocomposites. The neat matrix and PS/ZnO-based nanocomposites have been characterized through rheological, morphological, mechanical, and dynamic thermo-mechanical analysis. Both TSPH and TSIB are able to improve the dispersion of ZnO into the polystyrene matrix; furthermore, adding TSIB leads to better results because it facilitates better solubility into the PS matrix and interaction/reaction with the ZnO nanopowder. Finally, the optical properties and photo-oxidative resistance of the nanocomposite films have been evaluated. The POSS molecules synergistically interact with ZnO nanopowder in the protection of PS matrix against photo-oxidative process. The nanocomposite films containing both ZnO and POSS molecules, particularly TSIB, exhibit better UV-shielding properties than the PS/ZnO one, without loss of optical transparency.

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Rozprawy doktorskie na temat "ZnO based Nanocomposites"

Doddapaneni, Venkatesh. "On the polymer-based nanocomposites for electrical switching applications". Doctoral thesis, KTH, Tillämpad fysik, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-202702.

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Recent research demonstrated that polymer based nanocomposites (PNCs) have been engineered in order to improve the arc interruption capability of the circuit breakers. PNCs are the combination of nano-sized inorganic nanoparticles (NPs) and polymers, opened up new developments in materials science and engineering applications. Inorganic NPs are selected based on their physical and chemical properties which could make multifunctional PNCs in order to interrupt the electrical arcs effectively. In particular, we presented the PNCs fabricated by using CuO, Fe3O4, ZnO and Au NPs in a poly (methyl methacrylate) (PMMA) matrix via in-situ polymerization method, recently developed method to avoid NPs agglomeration, leading to good spatial distribution in the polymer matrix. Thus, several samples with various wt% of NPs in PMMA matrix have been fabricated. These PNCs have been characterized in detail for the morphology of NPs, interaction between NPs and polymer matrix, and radiative/thermal energy absorption properties. In the next stage, PNCs are tested to determine their arc interruption performance and impact on the electrical arcs of current 1.6 kA generated using a specially designed test set-up. When PNCs interact with the electrical arcs, they generate ablation of chemical species towards core of the electrical arc, resulting in cooling-down the arc due to strong temperature and pressure gradient in the arc quenching domain. This thesis demonstrates for the first time that these engineered PNCs are easily processed, reproducible, and can be used to improve the arc interruption process in electrical switching applications.
Ny forskning har visat att polymerbaserade nanokompositer (PNCs) har utformats för att förbättra strömbrytares förmåga att undvika ljusbågar vid överslag. PNCs är en kombination av nanostora oorganiska nanopartiklar (NP) och polymerer, som har öppnat upp för ny utveckling inom materialvetenskap och tekniska tillämpningar. Oorganiska NP väljs baserat på deras fysikaliska och kemiska egenskaper som kan hjälpa PNCs att motverka elektriska ljusbågar effektivt. I synnerhet, presenterade vi PNCs tillverkade genom användning av CuO, Fe3O4, ZnO och Au NP i en poly (metylmetakrylat) (PMMA)-matris via in situ-polymerisationsmetod, nyligen utvecklad för att undvika NP-agglomerering, vilket leder till god rumslig fördelning i polymermatrisen. Därför har flera prover med olika vikt% av NP i PMMA-matris tillverkats. Dessa PNCs har utvärderats i detalj för NP-morfologi, interaktion mellan NP och polymermatris, och strålnings- och värmeenergiabsorption. I nästa skede testas PNCs för att bestämma deras förmåga att undvika ljusbågar och påverkan på de elektriska ljusbågarna av 1,6 kA strömstyrka, genererade med hjälp av en specialdesignad test-set-up. När PNCs interagerar med de elektriska ljusbågarna, genererar de ablation av kemiska ämnen mot kärnan i den elektriska ljusbågen, vilket resulterar i nedkylning av ljusbågen på grund av starka temperatur- och tryckgradienter i området. Denna avhandling visar för första gången att dessa konstruerade PNCs är lätta att framställa, reproducerbara, och kan användas för att förbättra avbrottsprocessen för ljusbågen i elektriska kopplingstillämpningar.

QC 20170303

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Byl, Céline. "Synthèse et caractérisation de nanocomposites à base de ZnO pour des applications thermoélectriques". Thesis, Paris 11, 2015. http://www.theses.fr/2015PA112045/document.

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Ce travail de thèse a pour objectif l’obtention de nanocomposites denses ZnO/SiO2 afin d’améliorer les propriétés thermoélectriques de l’oxyde de zinc. Ce manuscrit décrit différents aspects de l’élaboration tant en terme de synthèse que de densification de nanocomposites ZnO/SiO2 ainsi que leur caractérisation. Afin d’obtenir des nanoparticules en grande quantité, de bonne cristallinité et de taille inférieure à 10 nm, l’optimisation d’une synthèse par voie polyol en jouant sur différents paramètres (pH, température, taux d’hydrolyse, solvant, surfactant) a été réalisée. Nous avons pu mettre en évidence l’intérêt d’utiliser l’acide benzoïque comme surfactant pour éviter l’agglomération de ces nanoparticules. La modification de surface des nanoparticules par de la silice a ensuite été explorée. Cette modification a été réalisée par une méthode classique, le procédé Stöber, ainsi que par une technique moins conventionnelle, l’ALD. Une étude approfondie de la densification par SPS à la fois de l’oxyde de zinc et des nanoparticules recouvertes a été décrite. L’influence de la couche amorphe déposée sur la croissance cristalline des nanoparticules a été démontrée. Nous avons par ailleurs pu mettre en exergue une pollution importante par du carbone lors de la densification des composés entrainant des modifications importantes des propriétés de transport. Le résultat majeur de cette thèse est la mise en évidence de clusters d’oxyde de zinc fortement dopés dans ces composés qui remet en question les mécanismes de transport dans le ZnO
This study is focusing on the synthesis of nanocomposites of Al doped ZnO/SiO2 with high density in order to increase the thermoelectric properties of ZnO. This work describes the optimization of the synthesis by investigating the effect of different experimental parameters (temperature, type of surfactant, degree of hydrolysis, nature of the solvent, pH) to obtain large amount of nanoparticles with size below 10 nm and good crystallinity. We have identified that using benzoic acid as surfactant could avoid the formation of particle aggregates. The modification of nanoparticles surfaces with SiO2 was investigated by using two methods the Stöber process and ALD. The possibility of ZnO and nanocomposite powder densification by spark plasma sintering was also tackled as well as the role played by the main parameters of the method (applied pressure and the best moment of its application, heating rate). The influence of the amorphous shell on the limiting grain growth during the sintering was demonstrated. Furthermore, a carbon accumulation which modifies the thermoelectric properties in the densified pellet was demonstrated. The source of it was assigned in part to the densification process. The most significant result of this study was the finding of the presence of ZnO clusters strongly doped wich could have fundamental implications as it may reopen the discussion on the transport mechanism in ZnO

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Salvador, Levehang Claudia. "Développement de membranes MOF nanocomposites à base de ZIF". Thesis, Montpellier, Ecole nationale supérieure de chimie, 2014. http://www.theses.fr/2014ENCM0020.

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Les réseaux zéolithiques à base d'imidazolate (e.g. ZIF-8) sont des matériaux membranaires attractifs pour la séparation de gaz, sous réserve de pouvoir disposer de membranes de haute qualité, stables et reproductibles sur des supports industriels. Dans ce travail plusieurs stratégies ont été examinées pour développer des membranes nanocomposites à base de ZIF-8 confiné dans les macropores de supports céramiques tubulaires. Trois approches ont été comparées: i) croissance de germes, ii) croissance in situ et iii) conversion de ZnO. L'influence des paramètres de synthèse (formulation des solutions de précurseurs, température & durée de réaction, type de support & prétraitement…) sur les caractéristiques et performances des membranes a été étudiée. Le protocole optimum retenu repose sur la conversion solvothermale de couches minces de ZnO déposées par ALD sur les grains du support. Les membranes nanocomposites ZIF-8/ZnO/α-Al2O3 sont sélectives pour la séparation de gaz contenant H2
Zeolitic Imidazolate Frameworks (e.g. ZIF-8) are attractive membrane materials for gas separation, provided that high quality, stable and reproducible membranes can be prepared on industrial supports. In this work several strategies were investigated in order to develop nanocomposite ZIF-8 based membranes confined in the macropores of tubular ceramic supports. Three approaches were compared: i) seeded growth, ii) in situ growth and iii) ZnO conversion. The influence of synthesis parameters (precursor solution formulation, reaction temperature & duration, support type & pre-treatment…) on membrane characteristics and performance were studied. The selected optimum protocol was based on the solvothermal conversion, using a 2-methylimidazole/methanol solution, of a ZnO thin layer uniformly deposited by Atomic Layer Deposition on the grains of a ceramic support. The nanocomposite ZIF-8/ZnO/α-Al2O3 membranes exhibited enhanced selectivities for the separation of H2-containing gas mixtures

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Olenych, I. B., O. I. Aksimentyeva i 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 interface.

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Shen, Xiu-Ru, i 沈秀如. "Light-Emitting Diodes Based On p-GaN/n-ZnO Nanorods-Carbon Dots Nanocomposites Prepared by the Hydrothermal Method". Thesis, 2017. http://ndltd.ncl.edu.tw/handle/ft5m53.

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碩士
國立臺灣海洋大學
光電科學研究所
105
The p-GaN/n-ZnO nanorods light-emitting diodes (LEDs) with near-ultraviolet electroluminesce (EL) based on ZnO:carbon dots composites were realized. The emission intensity can be tuned by adjusting the concentrations of carbon dots in the precursors of ZnO NRs. The enhanced light output power of energy efficient p-GaN/n-ZnO composite nanorods LEDs reported here can be possibly attributed to the important role of carbon dots in ZnO/carbon dots composite nanorods acting as a conducting network in the ZnO active matrix that leads to the surface plasmon(SP) enhanced light emission and the improved electrical conductivity. Our work proposed a simple route to fabricate efficient near-ultraviolet LEDs assisted by additions of carbon dots.

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Islam, Sk Emdadul, i 安柏卓. "Wet chemical synthesis of ZnO and transition metal dichalcogenide based low-dimensional nanocomposites for highly efficient photocatalytic activity". Thesis, 2019. http://ndltd.ncl.edu.tw/handle/8gf9s3.

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博士
國立中山大學
材料與光電科學學系研究所
107
This dissertation describes the synthesis of low-dimensional nanostructures via a series of facile aqueous solution methods at low temperature (<2000C). We started with the fabrication of vertically aligned ZnO nanorods (NRs) on aluminum-doped zinc oxide (AZO) substrates by a single-step aqueous solution method. In order to strengthen photoluminescence (PL) property, ZnO nanorod arrays were annealed at various temperature. We found that the annealing temperature strongly affects both the near-band-edge (NBE) and visible (defect-related) emissions, this eventually leads to the understanding of the optimum annealing condition to achieve enhanced optical properties. Some important findings were found from the PL study, for example, the enhancement of NBE is due to the activation of radiative recombinations associated to hydrogen donors (Ho), and the reduction of visible emission is mainly because of the annihilation of OH groups from the ZnO surface. This interesting finding motivated us to synthesis ZnO hybrids so that we can exploit its promising optical properties in the photocatalysis application under UV or visible light illumination. Next, the plasmonic Au nanoparticles were deposited on the ZnO nanorod arrays to fabricate a noble metal/semiconductor hybrid structures. Interestingly, this Au/ZnO platform exhibits amazing UV-Vis photocatalytic activity alongside the strong luminescent properties. The visible-light active photocatalysis is assisted by localized surface plasmon resonance (LSPR) excitations while the strong absorption and charge separation under UV irradiation is responsible for enhanced catalytic performance. Besides, the enhancement in optical properties is mainly due to local field enhancement effect and the coupling between exciton and LSPR. For the first time, we showed that the plasmonic enhancement of photocatalytic performance is not necessarily a trade-off for enhanced near-band-edge emission in Au/ZnO. The excellent emission property and photocatalytic activity results motivated us to combine low-dimensional ZnO nanostructures with some earth-abundant two-dimensional (2D) materials as a replacement of expensive noble metals. Thus, we prepared heterodimensional nanostructures of 2D ultrathin MoS2 nanosheets interspersed with ZnO nanoparticles by using a facile two-step method. Foremost sonication-aided liquid phase exfoliation technique (LPE) was used to exfoliate ultrathin MoS2 nanosheets in ethanol/water solvent, subsequently a wet chemical process was employed to realize interspersion of ZnO nanoparticles onto the MoS2 surface. In this case, ultra-thin MoS2 nanosheets acted as the support for the nucleation of various concentrated small ZnO dots. The photocatalytic activity of the ZnO/MoS2 nanocomposites was performed with organic dye pollutants and tetracycline, a common antibiotic, as a model compound under visible-light irradiation. We found extremely high catalytic efficiency with these composites under visible light, where the reaction rate of pollutant degradation is about eight times higher than those of commercial P25-TiO2 photocatalysts. This outstanding photocatalytic activity of the heterodimensional hybrids results from the synergetic effects of ZnO and MoS2. Most importantly, the heterojunction formation between ZnO and MoS2 facilitates the separation of photogenerated active charge carriers, leading to the enhancement of photocatalytic performance. Moreover, a tentative mechanism for photocatalytic degradation was proposed in this report, which can provide valuable insights for the exploration of cost-effective nanoscale hybrids constructed from atomically thin layered materials. Finally, we have synthesized mesoporous C-ZnO nanostructured via a facile one-step hydrothermal process, and then liquid-exfoliated 2D MoS2 nanosheets were integrated with the C-ZnO through simple thermal treatment to obtain C-ZnO@MoS2 composites. The photocatalytic activity was evaluated under visible light irradiation and we found the significant enhancement in photodegradation of organic dye molecules by the introduction of MoS2 nanosheet on C-ZnO. Such a significant photoactivity could be attributed to the MoS2 nanosheets that strengthen the visible-light absorption to create the electrons and holes in the system and their favourable separation occur by the electron transaction between ZnO, and MoS2. The synergistic effect between carbon, MoS2 and ZnO makes C-ZnO@MoS2 composites a suitable visible-light driven photocatalyst.

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Jiun-TingChen i 陳俊廷. "Characterizations of ZnO-SiO2 Nanocomposite Film Based Optoelectronic Devices". Thesis, 2013. http://ndltd.ncl.edu.tw/handle/40130247069853319438.

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博士
國立成功大學
光電科學與工程學系
101
In this dissertation, zinc oxide-silicon dioxide (ZnO-SiO2) nanocomposite films were grown via a co-sputter system at room temperature (RT). High-resolution transmittance electron microscopy (HRTEM) results reveal that the diameter of ZnO nanoparticles in the ZnO-SiO2 nanocomposite was within 3 mm to 7 nm. In addition, the ZnO-SiO2 nanocomposite films have wide bandgap characteristics. Thus, they are used to fabricate a p-GaN/i-ZnO/n-ZnO:In (p-i-n) light-emitting diode (LED) and a flexible solar-blind photodetector (PD). First, ZnO-SiO2 nanocomposite films were placed between p-GaN and n-ZnO:Ga (GZO) to obtain a p-i-n heterojunction structure LEDs. This device exhibited an emission peak at 376 nm in the electroluminescence (EL) spectrum while operating at a current injection of 9 mA. A flat-top nanosecond laser (FTNL) was used to anneal the ZnO-SiO2 nanocomposite layer simultaneously. The intensity of the EL emission peak of ZnO-SiO2 nanocomposite LEDs at 376 nm at a current of 9 mA with FTNL treatment was approximately 1.4 times greater than those of LEDs without FTNL treatment. Furthermore, the full-width at half maximum (FWHM) of the EL emission of FTNL-treated LEDs at 376 nm was narrower than those of LEDs without FTNL treatment. Thus, the FTNL treatment of ZnO-SiO2 nanocomposite LEDs could induce the recrystallization of distributed ZnO nanoclusters and reduce the defects in the ZnO-SiO2 nanocomposite layers. Second, an organosilicon compound [SiOx(CH3)] was used as the buffer layer between the ZnO-SiO2 nanocomposite film and the substrate in fabricating a flexible solar-blind PD. The compound can reduce the internal stress of the ZnO-SiO2 nanocomposite film and improve the characteristics of the PD to produce a low-noise, flexible solar-blind PD with high detectivity. The maximum responsivity value and quantum efficiency of the device at -10 V were 0.75 A/W and 482% at 240 nm, respectively. This result indicates a high deep ultraviolet (DUV)-to-visible rejection ratio (R = 240 nm/R = 400 nm) of five orders of magnitude, which was due to the internal gain in the device. Finally, after bending measurements, the DUV-to-visible rejection and responsivity of flexible PDs slightly attenuated when the radius of the curvature decreased. However, all PDs retained their favorable photoelectric properties, especially the flexibility of the PD caused by the organosilicon compound thin film. These results indicate that the flexible ZnO-SiO2 nanocompsite solar-blind PD works when the bending radius is larger than 8.6 mm. The buffer layer [SiOx(CH3)] released the stress on the ZnO-SiO2 nanocomposite during bending, enhanced the characteristics of PDs, and suppressed the reduction of photoelectric properties.

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Chen, Yung-Ting, i 陳勇廷. "Optoelectronic properties of nanocomposite devices based on ZnO and Si". Thesis, 2011. http://ndltd.ncl.edu.tw/handle/93190342282052638953.

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博士
國立臺灣大學
物理研究所
99
In this thesis, we have reported the design, fabrication, and characterization of nanoscale semiconductors and optoelectronic devices. Several newly designed nanocomposites with intriguing properties have been discovered, which are described below. It is believed our studies shown here can serve as a key step for the further development of novel functional optoelectronic devices. 1.Giant white and blue light emission from Al2O3 and ZnO nanocomposites A new and general approach enabling us to amplify not only the bandgap emission of ZnO nanorods but also the defect emission of Al2O3 is proposed. The light intensity of the band edge emission of ZnO nanorods can be improved by as much as 19 times after the decoration of Al2O3 layers. Moreover, white light emission arising from Al2O3 defects in ZnO/Al2O3 nanostructures also shows a large enhancement factor of 12 times. The underlying physics has been attributed to the diffusion of oxygen atoms from Al2O3 to ZnO nanorods. Our new strategy offers an alternative possibility to create strong white and blue light-emitting devices. 2.Enhanced random lasing in ZnO nanocombs assisted by Fabry-Perot resonance The ultraviolet random lasing behavior of an ensemble of ZnO nanocombs has been demonstrated. It is found that the Fabry-Perot resonance induced by nanocomb geometry can greatly enhance random lasing action with a low threshold condition. Besides, the emission spectra exhibit few sharp lasing peaks with a full width at half maximum (FWHM) of less than 0.3 nm and a narrow background emission with a FWHM of about 5 nm. Cathodoluminescence mapping images are utilized to analyze the Fabry-Perot resonance phenomenon. The resonant effect on the lasing system is further confirmed by nanocombs with different resonant cavity lengths. The unique lasing behavior induced by the simultaneous occurrence of Fabry-Perot resonance and random laser action shown here may open up a new possibility for the creation of highly efficient light emitting devices. 3.Highly sensitive MOS photodetector with wide band responsivity assisted by nanoporous anodic aluminum oxide membrane A new approach for developing highly sensitive MOS photodetector based on the assistance of anodic aluminum oxide (AAO) membrane is proposed, fabricated, and characterized. It enables the photodetector with the tunability of not only the intensity but also the range of the response. Under a forward bias, the response of the MOS photodetector with AAO membrane covers the visible as well as infrared spectrum; however, under a reverse bias, the near-infrared light around Si band edge dominates the photoresponse. Unlike general MOS photodetectors which only work under a reverse bias, our MOS photodetectors can work even under a forward bias, and the responsivity at the optical communication wavelength of 850nm can reach up to 0.24 A/W with an external quantum efficiency (EQE) of 35%. Moreover, the response shows a large enhancement factor of 10 times at 1050 nm under a reverse bias of 0.5V comparing with the device without AAO membrane. The underlying mechanism for the novel properties of the newly designed device has been proposed. 4.MOS photodetectors based on Au-nanorods doped graphene electrodes By using Au-nanorods (Au-NRs) doped graphene as a transparent conducting electrode, Si-based metal-oxide-semiconductor (MOS) photodetectors (PDs) exhibit high external quantum efficiency (EQE) and fast response time. It is found that upon adding Au-NRs to the graphene, the significant increase in EQE is observed for both planar and Si-nanotips (Si-NTs) MOS PDs. The planar Si-based MOS PDs reveal a notable photoresponse with an EQE of 49% at the peak wavelength of 530 nm under zero bias, and an EQE of 66% at the peak wavelength of 600 nm under -0.4 V bias. For the Si-NTs MOS PD, it exhibits a relatively high EQE of 71% under -4 V bias due to the effect of light trapping arising from the nature of Si-NTs array. 5.Ultraviolet electroluminescence from hybrid inorganic/organic ZnO/GaN/poly(3-hexylthiophene) dual heterojunctions Based on hybrid inorganic/organic n-ZnO nanorods/p-GaN thin film/poly(3-hexylthiophene)(P3HT) dual heterojunctions, the light emitting diode (LED) emits ultraviolet (UV) radiation (370 nm – 400 nm) and the whole visible light (400 nm -700 nm) at the low injection current density. Meanwhile, under the high injection current density, the UV radiation overwhelmingly dominates the room-temperature electroluminescence spectra, exponentially increases with the injection current density and possesses a narrow full width at half maximum less than 16 nm. Comparing electroluminescence with photoluminescence spectra, an enormously enhanced transition probability of the UV luminescence in the electroluminescence spectra was found. The P3HT layer plays an essential role in helping the UV emission from p-GaN material because of its hole-conductive characteristic as well as the band alignment with respect to p-GaN. With our new finding, the result shown here may pave a new route for the development of high brightness LEDs derived from hybrid inorganic/organic heterojuctions.

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Yeh, Chen-han, i 葉承翰. "Polymer Light Emitting Diodes Based on DBPPV-ZnO Nanocomposite Emissive Layer". Thesis, 2007. http://ndltd.ncl.edu.tw/handle/02771379177043249299.

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碩士
國立成功大學
光電科學與工程研究所
95
By the development of the intelligent industry, people have more require for monitor. And polymer light emitting diodes (PLED) have attracted much attention because of their potential applications in information display. They have some advantages such as low fabrication cost, easy processing, lightweight, and can fabricated on large area display and flexible substrate…,etc. However, the conjugated polymer is easy to affect by the moisture and oxygen in environment, and then influence the performance and life time to limit its applications in commercial, so there are many researches discussing to improve the performance of PLED. In this thesis, we composite different proportion of ZnO nanoparticle into DBPPV emissive layer, and discussed the influence of ZnO to PLED. In this work, the double layer structure had been made (ITO/PEDOT/Composite layer/Ca/Al) .The PEDOT (40nm) served as HTL and composite layer spin coated as emission layer. We observed the roughness of emission layer increased when the ZnO nanoparticle composite with the proportion of ZnO nanoparticle increasing. By the analysis of AFM and SEM, we demonstrated that the phenomenon of cluster decrease as the reduction of ZnO proportion. The best proportion of DBPPV to ZnO is 3:1; It demonstrated the ZnO nanoparticle have the ability to improve the current density, luminance and efficiency. After being annealed the nanocomposite device at 120℃, the highest luminance efficiency is 2.90 cd/A @ 1.87 mA/cm.

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Liu, Tsung-Sheng, i 劉宗昇. "Aluminum based in situ nanocomposite produced from Al-Mg-ZnO powder mixture by using friction stir processing". Thesis, 2014. http://ndltd.ncl.edu.tw/handle/g83fv9.

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碩士
國立中山大學
材料與光電科學學系研究所
103
Friction stir processing was used to fabricate the aluminum based in situ composite from powder mixture of Al-Mg-ZnO. In the Al-Mg-ZnO composites, MgO particles were produced in situ by oxide-aluminum displacement reactions. Microstructural observations revealed the average Al grain size in the FSPed composite was about 1.10±0.61 μm. The composite exhibits superior mechanical strength due to the large amount of nanometer-sized reinforcements in a submicron-grained matrix after heat treatment.

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Części książek na temat "ZnO based Nanocomposites"

Zahmouli, N., S. G. Leonardi, A. Bonavita, M. Hjiri, L. El Mir, Nicola Donato i G. Neri. "High Performance VOCs Sensor Based on ɣ-Fe2O3/Al-ZnO Nanocomposites". W Lecture Notes in Electrical Engineering, 25–30. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-04324-7_4.

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Pyrz, Ryszard. "Optical and Piezoelectric Properties of ZnO Nanowires and Functional Polymer-Based Nanocomposites". W Frontiers in Materials Science and Technology, 107–10. Stafa: Trans Tech Publications Ltd., 2008. http://dx.doi.org/10.4028/0-87849-475-8.107.

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Talukdar, Keka. "ZnS/ZnO Nanocomposite in Photovoltaics: A Computational Study on Energy Conversion". W Nanomaterials-Based Composites for Energy Applications, 185–213. Includes bibliographical references and index.: Apple Academic Press, 2019. http://dx.doi.org/10.1201/9780429265051-8.

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Nižòanský, Daniel, Jakub Rùžièka, Alena Beitlerová, Jindøich Houžvièka, Petr Horodyský, Václav Tyrpekl, Ivo Jakubec, Akira Yoshikawa i Martin Nikl. "Chapter 7 ZnO-Based Phosphors and Scintillators: Preparation, Characterization, and Performance". W Nanocomposite, Ceramic and Thin Film Scintillators, 303–32. Penthouse Level, Suntec Tower 3, 8 Temasek Boulevard, Singapore 038988: Pan Stanford Publishing, 2016. http://dx.doi.org/10.1201/9781315364643-8.

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Tabibi, Maryam, Zahra Rafiee i Mohammad Hossein Sheikhi. "Room Temperature Acetone Sensing Based on ZnO Nanowire/Graphene Nanocomposite". W Lecture Notes in Electrical Engineering, 359–67. Singapore: Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-10-8672-4_27.

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Sharma, Rajni, Firoz Alam, A. K. Sharma, V. Dutta i S. K. Dhawan. "Hydrophobic ZnO Anchored Graphene Nanocomposite Based Bulk Hetro-Junction Solar Cells to Improve Short Circuit Current Density". W Graphene Materials, 245–75. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2015. http://dx.doi.org/10.1002/9781119131816.ch8.

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Goswami, Lalit, Anamika Kushwaha, Shivani Goswami, Yogesh Chandra Sharma, TaeYoung Kim i Kumud Malika Tripathi. "Nanocarbon-based-ZnO nanocomposites for supercapacitor application". W Nanostructured Zinc Oxide, 553–73. Elsevier, 2021. http://dx.doi.org/10.1016/b978-0-12-818900-9.00008-5.

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"Graphene-Based ZnO Nanocomposites for Supercapacitor Applications". W Graphene as Energy Storage Material for Supercapacitors, 181–208. Materials Research Forum LLC, 2020. http://dx.doi.org/10.21741/9781644900550-7.

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Saraswat, Vibhav K. "ZnO nanofillers–based polymer and polymer blend nanocomposites". W Nanostructured Zinc Oxide, 157–86. Elsevier, 2021. http://dx.doi.org/10.1016/b978-0-12-818900-9.00023-1.

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Ge, Hui, Weixing Wang, Lichun Huang, Mingxing Tang i Zhenyu Ge. "The Relation of Ni/ZnO Nano Structures With Properties of Reactive Adsorption Desulfurization". W Nanocomposites for the Desulfurization of Fuels, 134–67. IGI Global, 2020. http://dx.doi.org/10.4018/978-1-7998-2146-5.ch005.

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Ni/ZnO nano-sorbent systems have been extensively used in the reactive adsorption desulfurization (RADS) of gasoline steams, especially in China, to meet the more rigorous regulation on the sulfur content. The apparent advantage of RADS is that most of the olefins are kept in the product with low consumption of hydrogen and little loss of octane. The authors discussed in this chapter the relation of catalytic properties with components and structures of Ni/ZnO sorbent. Based on detailed characterization and reaction results, they revealed the dynamic change of Ni/ZnO sorbents during RADS, the mechanisms of desulfurization, and the sulfur transfer and sulfur adsorption. Apart from the RADS of Ni/ZnO nano-sorbent for cleaner gasoline production, they also presented other potential applications.

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Streszczenia konferencji na temat "ZnO based Nanocomposites"

Abdul-kareem, Asma Abdulgader, Noura AlSanari, Amal Daifallah, Radwa Mohamed, Jolly Bhadra, Deepalekshmi Ponnamma i Noora Al-Thani. "Piezoelectric Nanogenerators based on Pvdf-Hfp/Zno Mesoporous Silica Nanocomposites for Self-Powering Devices". W Qatar University Annual Research Forum & Exhibition. Qatar University Press, 2020. http://dx.doi.org/10.29117/quarfe.2020.0054.

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Due to the rising global concern over energy catastrophe and environmental issues, attention has been diverted towards future energy. In recent times, rechargeable power and renewable energy sources have been considered as an attractive substitute for resolving the future environmental problems. Among them, mechanical energy is one of the most abundant energy sources, and easily transformable to other useful energy forms, such as electrical energy. For such purposes, piezoelectric materials with ability to convert the mechanical energy generated by various activities into electrical energy. In this research work, we have investigated the morphology, structure and piezoelectric performances of neat polyvinylidene fluoride hexafluoropropylene (PVDF-HFP), PVDF-HFP/ZnO, PVDFHFP/ Mesoporous silica, PVDF-HFP 1% and PVDF-HFP 3% ZnO-Mesoporous silica nanofibers, fabricated by electrospinning. Both SEM and TEM images of ZnO nanoparticles shows formation of uniform flake of about 5nm diameter and Mesoporous silica shows uniform spherical morphology with average diameter of 5 μm. EDX plot justifies the presences of Zn, O and Si. An increase in the amount of crystalline β-phase of PVDF-HFP has been observed with the introduction of ZnO and mesoporous silica in the PVDF-HFP matrix are observed in FTIR spectra. All the XRD peaks observed in neat PVDF has the strongest intensity compared to rest of the other XRD peaks of polymer nanocomposite. The XRD spectra of all the nanocomposites have peaks at 17.8°, 18.6° correspond to α- crystalline phase, the peaks observed at 19°, 20.1° correspond to the γ- crystalline phase, and the peak at 20.6° corresponds to the β- crystalline phase. The flexible nanogenerator manipulated from the polymer nanocomposite with 1% ZnO-Mesoporous silica exhibits an output voltage as high as 2 V compared with the neat PVDF-HFP sample (~120 mV). These results indicate that the investigated nanocomposite is appropriate for fabricating various flexible and wearable self-powered electrical devices and systems.

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Zhao, Yingjun, Kenneth J. Loh i Donghee Chang. "Piezoelectric and Mechanical Performance Characterization of ZnO-Based Nanocomposites". W 19th Analysis and Computation Specialty Conference. Reston, VA: American Society of Civil Engineers, 2010. http://dx.doi.org/10.1061/41131(370)11.

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Billings, Christopher, Peter Kim, Changjie Cai i Yingtao Liu. "Manufacturing and Characterization of Nanocomposites With Antibacterial Nanoparticles". W ASME 2022 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2022. http://dx.doi.org/10.1115/imece2022-94218.

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Abstract This paper will present the advanced manufacturing of a novel nanocomposite utilizing digital light processing (DLP) based 3D printing technology. The novel nanocomposite will be manufactured from a photocurable resin and zinc oxide in the 10–30 nm range with varying volume fraction ratios. Weight concentrations of 1–5% will be analyzed concerning tensile strength, water contact angle, and dispersion. In addition, samples will be examined through a scanning electron microscope (SEM) to demonstrate the lack of particle aggregation and voids within the part. The nanocomposites produced demonstrated a significant strength increase at 5% concentrations and an increase in water contact angle. An ultimate tensile strength of 39.51 Mpa was achieved on average compared to the neat resin control value of 31.63 Mpa. In addition, SEM analysis illustrated a properly dispersed nanoparticle with low amounts of agglomeration. The utilization of zinc oxide (ZnO) as a mechanical additive in DLP manufacturing demonstrated a novel method for increasing part strength with functional nanoparticles. Due to the design freedom gained with additive manufacturing, nanocomposites produced promise a greater strength-to-weight ratio than those manufactured through traditional methods.

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Nair, Manjula G., Meenakshi Malakar, Saumya R. Mohapatra i Avijit Chowdhury. "Synthesis of ZnO nanorods and observation of resistive switching memory in ZnO based polymer nanocomposites". W 2ND INTERNATIONAL CONFERENCE ON CONDENSED MATTER AND APPLIED PHYSICS (ICC 2017). Author(s), 2018. http://dx.doi.org/10.1063/1.5032506.

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Skandani, Amir Alipour, Ayoub Yari Boroujeni i Marwan Al-Haik. "Temperature Dependent Viscoelastic Behavior of FRP/ZnO Nano-Rods Hybrid Nanocomposites". W ASME 2013 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/imece2013-63326.

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The inclusion of nanomaterials within fiber reinforced plastics (FRPs) could improve their resistance against time dependent deformation. Conceivable high temperature applications of such hybrid composites make it crucial to investigate their temperature-dependent properties as well as their durability. In this study, zinc oxide (ZnO) nano rods were grown on the surface of carbon fibers and the hybridized reinforcement was formed in a laminate composites. The viscoelastic behavior was probed utilizing dynamic mechanical analysis (DMA). The time/temperature superposition principle (TTSP) was invoked to obtain the viscoelastic properties of FRPs based on fibers with different surface treatments. Results indicated that the presence of ZnO nano rods at the interface between the carbon fibers and the epoxy matrix enhances the composite’s creep resistance at elevated temperatures and prolonged duration.

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Youssef, Ahmed, i Islam EL-Nagar. "Preparation and Characterization of PMMA Nanocomposites Based On Zno-Nps for Antibacterial Packaging Applications". W The 5th World Congress on New Technologies. Avestia Publishing, 2019. http://dx.doi.org/10.11159/icnfa19.105.

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Guan, Huanan, Jialiang Jiang, Dandan Chen, Wei Wang, Yan Wang i Jiaying Xin. "Acetylcholinesterase biosensor based on chitosan/ZnO nanocomposites modified electrode for amperometric detection of pesticides". W 2015 International Conference on Materials, Environmental and Biological Engineering. Paris, France: Atlantis Press, 2015. http://dx.doi.org/10.2991/mebe-15.2015.39.

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ALEXANDRESCU, LAURENTIA. "ANTIBACTERIAL POLYMERIC NANOCOMPOSITES BASED ON PETr AND FUNCTIONALIZED ZnO NANOPARTICLES WITH APPLICATION IN THE FOOD INDUSTRIES". W 19th SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings. STEF92 Technology, 2019. http://dx.doi.org/10.5593/sgem2019/6.1/s24.005.

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Drmosh, Q. A., Z. H. Yamani, A. H. Y. Hendi, M. A. Gondal i R. A. Moqbel. "P1GS.3 - A low Temperature H2 Gas Sensor Based on Pt-loaded Reduced Graphene Oxide/ZnO Nanocomposites". W 17th International Meeting on Chemical Sensors - IMCS 2018. AMA Service GmbH, Von-Münchhausen-Str. 49, 31515 Wunstorf, Germany, 2018. http://dx.doi.org/10.5162/imcs2018/p1gs.3.

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Billings, Christopher, Changjie Cai i Yingtao Liu. "Investigation of 3D Printed Antibacterial Nanocomposites for Improved Public Health". W ASME 2021 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2021. http://dx.doi.org/10.1115/imece2021-72092.

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Abstract Bacterial infections have been recognized as a critical challenge to public health, resulting in substantial morbidity, mortality, and enormous costs. In this paper, a digital light processing (DLP) based 3D printing system is employed to rapidly manufacture photocurable thermoset polymers and nanocomposites for potential antibacterial applications. This work shows how nanoparticles that present antibacterial properties can be added to traditional DLP manufacturing and their effects on the physical properties. In this paper, titanium dioxide (TiO2) and zinc oxide (ZnO) nanoparticles in the 10 to 30-nm range are mixed with photocurable resins for rapid 3D printing and prototyping. The two resins used are a standard photopolymer rapid resin and an ABS-like photopolymer rapid resin. A 1% composite percentage is utilized to avoid the requirement of modification to the printing system due to greatly increased viscosity. Tensile testing data, contact angle data, and abrasion data are performed on a total of four different composites and two controls. These composites have shown a tensile strength of 29.53 MPa. At the 1% nanoparticle weight concentration, the 3D printing nanocomposites are transparent and demonstrate a complete penetration of particles throughout the entire print. The detailed experimental characterization will be conducted to understand the 3D printed material’s mechanical properties and microstructures fully. This research can enhance public health by providing a novel approach to control the spread of bacteria and other microbial.

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