Zinc Oxide Nanostructures and their Applications

Wahab, Rizwan; Hwang, Inhui; Shin, Hyung‐Shik; Kim, Young Soon; Musarrat, Javed; Al‐Khedhairy, Abdulaziz A.; Siddiqui, Maqsood A.

doi:10.1002/9781118311974.ch5

Cited by 16 publications

(13 citation statements)

References 93 publications

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“…Accordingly, due to the phases presented in the system, the growth techniques can be divided into two groups: vapor-liquid-solid (VLS) and vapor-solid-solid (VSS) mechanisms [ 39 ].…”

Section: Zno Structure and Main Growth Techniquesmentioning

confidence: 99%

“…As mentioned before, the literature on ZnO 1D nanostructures is vast; therefore, there are many reviews describing the different synthesis methods [ 34 , 35 ], optical [ 36 ] and electrical [ 37 ] properties, and practical applications of ZnO nanowires [ 38 , 39 ] and nanorods [ 40 ], including photocatalyst material [ 41 ], sensing platforms (chemical [ 42 ] and biological [ 43 , 44 ]), antibacterial element [ 45 ], light emissions sources(LEDs [ 46 ] and lasers [ 47 ]), dye-sensitized or thin film solar cells [ 48 ], field effect transistors [ 49 ], and piezoelectric nanogenerators [ 50 ].…”

Section: Introductionmentioning

confidence: 99%

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Photoluminescence of ZnO Nanowires: A Review

et al. 2020

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One-dimensional ZnO nanostructures (nanowires/nanorods) are attractive materials for applications such as gas sensors, biosensors, solar cells, and photocatalysts. This is due to the relatively easy production process of these kinds of nanostructures with excellent charge carrier transport properties and high crystalline quality. In this work, we review the photoluminescence (PL) properties of single and collective ZnO nanowires and nanorods. As different growth techniques were obtained for the presented samples, a brief review of two popular growth methods, vapor-liquid-solid (VLS) and hydrothermal, is shown. Then, a discussion of the emission process and characteristics of the near-band edge excitonic emission (NBE) and deep-level emission (DLE) bands is presented. Their respective contribution to the total emission of the nanostructure is discussed using the spatial information distribution obtained by scanning transmission electron microscopy−cathodoluminescence (STEM-CL) measurements. Also, the influence of surface effects on the photoluminescence of ZnO nanowires, as well as the temperature dependence, is briefly discussed for both ultraviolet and visible emissions. Finally, we present a discussion of the size reduction effects of the two main photoluminescent bands of ZnO. For a wide emission (near ultra-violet and visible), which has sometimes been attributed to different origins, we present a summary of the different native point defects or trap centers in ZnO as a cause for the different deep-level emission bands.

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“…Accordingly, due to the phases presented in the system, the growth techniques can be divided into two groups: vapor-liquid-solid (VLS) and vapor-solid-solid (VSS) mechanisms [ 39 ].…”

Section: Zno Structure and Main Growth Techniquesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Photoluminescence of ZnO Nanowires: A Review

et al. 2020

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“…These material has easy preparation process, which itself makes prominent, cost effective and gives various types of NSts 6 . The ZnO-NSts can be prepared via various processes such as thermal, aqueous and non-aqueous processes as described in previous reports 10 13 14 . Currently ZnO-NSts have been focused for various biological applications due to their biocompatible nature 6 .…”

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confidence: 99%

Self-Styled ZnO Nanostructures Promotes the Cancer Cell Damage and Supresses the Epithelial Phenotype of Glioblastoma

Wahab

Kaushik

Khan

et al. 2016

Sci Rep

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Extensive researches have been done on the applications of zinc oxide nanoparticles (ZnO-NPs) for the biological purposes. However, the role and toxicity mechanisms of ZnO nanostructures (ZnO-NSts) such as nanoplates (NPls), nanorods (NRs), nanosheets (NSs), nanoflowers (NFs) on cancer cells are not largely known. Present study was focused to investigate the possible mechanisms of apoptosis induced by self-designed ZnO-NSts, prepared at fix pH via solution process and exposed against human T98G gliomas including various cancers and non-malignant embryonic kidney HEK293, MRC5 fibroblast cells. NSts were used for the induction of cell death in malignant human T98G gliomas including various cancers and compared with the non-malignant cells. Notably, NRs were found to induce higher cytotoxicity, inhibitory effects on cancer and normal cells in a dose dependent manner. We also showed that NRs induced cancer cell death through oxidative stress and caspase-dependent pathways. Furthermore, quantitative and qualitative analysis of ZnO-NSts have also been confirmed by statistical analytical parameters such as precision, accuracy, linearity, limits of detection and limit of quantitation. These self-styled NSts could provide new perception in the research of targeted cancer nanotechnology and have potentiality to improve new therapeutic outcomes with poor diagnosis.

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“…According to Gangwar et al, (21) La 2 O 3 reacts hygroscopically upon the adsorption of water molecules onto molecular bonds before the hydroxylation reaction obtained from zinc chloride precursor sol-gel, (17) (b) short hexagonal zinc oxide rods obtained from zinc acetate precursor sol-gel, (17) (c) hexamethylenetetramine (HMTA)-enhanced zinc oxide nanoflakes obtained by hydrothermal method, (18) (d) zinc oxide crystal islands directly deposited via e-beam deposition from zinc metal precursor (no synthesis route), (19) and (e) zinc oxide microflowers obtained through wet-chemical-based synthesis with NaOH. (20) begins. La 2 O 3 and water molecules undergo a hydroxylation reaction that alters the molecular arrangement of La 2 O 3 .…”

Section: Lanthanum Oxidementioning

confidence: 99%

Hygroscopic Materials and Characterization Techniques for Fiber Sensing Applications: A Review

Riza¹,

Go²,

Maier³

et al. 2020

Sensors and Materials

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Various characterization techniques are used in the study of materials in order to understand their properties. Data and observation recording characterization of a material is done by researchers for various properties within various environments. One of the many properties that make a material attractive for use in certain devices is hygroscopicity. Various techniques for characterizing hygroscopicity have been developed and utilized. However, since these techniques are not usually the highlights of studies, there has been limited acknowledgement of the usefulness of hygroscopicity testing. This review introduces several established characterization techniques allowing researchers to fully characterize materials in terms of their hygroscopicity. The full potential of hygroscopic materials can be seen in their use in various fiber sensors. The deformation of materials upon exposure to water molecules can be utilized to perturb sensing elements in fiber sensors, allowing the user to take full advantage of the hygroscopicity of the material.

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Zinc Oxide Nanostructures and their Applications

Cited by 16 publications

References 93 publications

Photoluminescence of ZnO Nanowires: A Review

Photoluminescence of ZnO Nanowires: A Review

Self-Styled ZnO Nanostructures Promotes the Cancer Cell Damage and Supresses the Epithelial Phenotype of Glioblastoma

Hygroscopic Materials and Characterization Techniques for Fiber Sensing Applications: A Review

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