Piezoelectric and field emitted properties of controlled ZnO nanorods on CNT yarns

Seo, Mijeong; Jung, Young Bok; Lim, Dong-Chan; Cho, Daehwan; Jeong, Youngjin

doi:10.1016/j.matlet.2012.10.076

Cited by 25 publications

(6 citation statements)

References 16 publications

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“…Low cost and abundance in nature are attractive attributes for translation from research to industrial scale. Apart from the optoelectronic properties, ZnO also displays high photocatalytic activity [13], piezoelectricity [14] and antibacterial properties [15] making it one of the most versatile semiconducting oxides having a wide array of applications.…”

Section: Introductionmentioning

confidence: 99%

Template-free self-assembly of mesoporous ZnO nanocluster/ polymethyl methacrylate based anisotropic nanocomposite thin films with enhanced interfacial interactions and tuneable optical properties

Awasthi

Mohan

Singh

2023

J. Phys. D: Appl. Phys.

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Nature-inspired biomimetic growth of anisotropic, hierarchical nanostructures could offer insight into new and exciting crystalline properties for advanced multifunctional applications. Our study demonstrates diethanolamine-mediated mesoscopic self-assembly of semiconducting ZnO Quantum Dots (3-5 nm) into lattice-aligned, symmetrical nanoclusters (40-50 nm) via non-classical Oriented Attachment crystal growth observed in various biomineralization processes. Multifunctional nanocomposite thin films of self-assembled nanostructures and polymethyl methacrylate were spin-coated onto plasma-treated Si wafers and the surface and interfacial properties were rigorously studied. HR-TEM images depicted the oriented attachment growth process with neighboring nano-crystals having perfectly aligned lattices. Preferential orientation of the thin films along <100> direction was evident from the XRD data. Quantum confinement in ZnO QDs and surface defect originating sharp green PL emission were examined through UV-Vis absorption and Photoluminescence spectra respectively. DLS and Zeta potential studies of surface-engineered colloidal nanoclusters established excellent long-term physico-chemical stability with no agglomeration or transparency loss observed in ZnO mesocrystal suspension even after 6 months. Diethanolamine, due to its dual functionality radically enhanced the interaction between polar ZnO and non-polar PMMA matrix resulting in highly stable thin films (Class II hybrids) with enhanced surface and interfacial properties as evident from the extremely low surface roughness and homogenous nanofiller dispersion observed in AFM and FE-SEM studies. Chemical interactions at the interface were also established quantitatively by XPS binding energy measurements which suggested hydrogen bonds and covalent bonds between organic-inorganic phases promoted via diethanolamine surface engineering.

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Section: Introductionmentioning

confidence: 99%

Template-free self-assembly of mesoporous ZnO nanocluster/ polymethyl methacrylate based anisotropic nanocomposite thin films with enhanced interfacial interactions and tuneable optical properties

Awasthi

Mohan

Singh

2023

J. Phys. D: Appl. Phys.

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“…ZnO is a wide band gap (3.37 eV) II-VI compound semiconductor which has received a lot of attentions over the last decade because, it has a wide range of useful properties including electrical [5], optical [6], chemical [7] and magnetic [8]. Therefore, ZnO has become extraordinarily important because of its wide applications such as in catalysis [9], gas sensing [10], semiconductors [11], piezoelectric devices [12], UV-shielding materials [13], polymer coating [14], photochemical [15] and antibacterial agents [16]. As ZnO is a multifunctional material, the study on its NPs has been focused on their preparation using various methods including solid state reaction [9], flame spray pyrolysis [17], microwave-assisted method [18], sonochemical route [19], sol-gel [20], hydrothermal [21] and mechanochemical methods [22].…”

Section: Introductionmentioning

confidence: 99%

Polyvinyl Alcohol/Polyaniline/ZnO Nanocomposite: Synthesis, Characterization and Bactericidal Property

Samzadeh‐Kermani¹,

Mirzaee²,

Ghaffari‐Moghaddam³

2016

ABC

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In this study, a new nanocomposite based on Polyvinylalcohol/Polyaniline/Zinc oxide (PVA/PANi/ ZnO) was successfully synthesized. ZnO powder was used to produce its nanoparticles (NPs) using conventional method. PVA/PANi composite was used to produce ZnO NPs. Polyaniline was synthesized in sol solution of PVA in the presence of ammonium persulphate. Morphology and the size of ZnO NPs in nanocomposites were studied via Scanning Electron Microscopy (SEM), X-ray Diffraction (XRD) analysis and Infrared (IR) spectroscopy. According to XRD results, the average size of prepared ZnO NPs was found to be at the range 22 -34 nm. SEM images were shown hexagonal shape for ZnO NPs, which was used for the investigation of antibacterial property. Finally, the antibacterial activity of the prepared ZnO NPs and nanocomposites was evaluated against two bacteria of Gram positive Staphylococcus aureus and Gram negative Escherichia coli using paper disc diffusion method. The results were shown that the prepared nanocomposites were effective against two bacteria.

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“…In order to overcome this shortcoming, nano-ZnO was loaded on some supporters (clay soil, glass marble, CNT yarn, activated carbon, metal screening, etc.) to avoid the separation and recover nanocatalyst [10][11][12]. Bentonite, as a carrier, has many advantages, such as low cost [10], great stabilization, big surface area, good adsorption performance, and high ion exchange [13].…”

Section: Introductionmentioning

confidence: 99%

Quantum Sized Zinc Oxide Immobilized on Bentonite Clay and Degradation of C.I. Acid Red 35 in Aqueous under Ultraviolet Light

Zhang

et al. 2015

International Journal of Photoenergy

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Nano-ZnO supported on bentonite was prepared to form composite photocatalyst by sol-gel method. The photocatalyst was analyzed by X-ray diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscope (TEM). C.I. Acid Red 35 was used as simulating contaminant to be treated by ultraviolet light synergistic with nano-ZnO/bentonite. The results show that 5.7 nm ZnO particle was acquired and uniformly dispersed on the surface of the bentonite at calcination temperature of 200°C. The removal of C.I. Acid Red 35 could reach 84.9% after 200 min under optimum ZnO/bentonite dosage of 0.6 g L−1. The 60% ZnO content in ZnO/bentonite composite exhibited a great photocatalytic activity to treat C.I. Acid Red 35. The photocatalytic process followed pseudo-first-order kinetics and the best apparent rate constant was 0.00927 min−1with correlation coefficient (R2) of above 0.98.

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Piezoelectric and field emitted properties of controlled ZnO nanorods on CNT yarns

Cited by 25 publications

References 16 publications

Template-free self-assembly of mesoporous ZnO nanocluster/ polymethyl methacrylate based anisotropic nanocomposite thin films with enhanced interfacial interactions and tuneable optical properties

Template-free self-assembly of mesoporous ZnO nanocluster/ polymethyl methacrylate based anisotropic nanocomposite thin films with enhanced interfacial interactions and tuneable optical properties

Polyvinyl Alcohol/Polyaniline/ZnO Nanocomposite: Synthesis, Characterization and Bactericidal Property

Quantum Sized Zinc Oxide Immobilized on Bentonite Clay and Degradation of C.I. Acid Red 35 in Aqueous under Ultraviolet Light

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