Enhanced Performance of Al-Doped Zinc Oxide Nanorods at Different Concentration Using Sol-Gel Preparation Methods towards Humidity Sensing Application

2015 ◽  
Vol 1109 ◽  
pp. 519-523
Author(s):  
Ahmad Syakirin Ismail ◽  
Mohd Firdaus Malek ◽  
Muhammad Amir Ridhwan Abdullah ◽  
Mohamad Hafiz Mamat ◽  
M. Rusop
Keyword(s):  
Zinc Oxide ◽  
Sol Gel ◽  
Zno Nanorods ◽  
Zinc Oxide Nanorods ◽  
Al Doping ◽  
Preparation Methods ◽  
Current Voltage ◽  
Oxide Nanorods ◽  
Sensing Application ◽  
Gel Preparation

Zinc oxide (ZnO) nanorods with different Aluminium (Al) – doping concentration (at%) has been deposited on glass substrate. The concentrations of Al were varied from 0 (undoped), 0.2, 0.8, and 3 at %. Field emission scanning electron microscopy (FESEM) was used to study the structural properties of the samples, UV-vis for absorbance and transmittance coefficient, and current voltage (I-V) measurement for electrical properties. From the results, it is observed that the diameter size of nanorods were reduced upon the increasing of Al-concentration. The I-V measurement showed that the 0.8 at% doping sample produced the highest conductivity.

Zinc Oxide Nanorods Characteristics Prepared by Sol-Gel Immersion Method Immersed at Different Times

2013 ◽  
Vol 667 ◽  
pp. 375-379 ◽  
Author(s):  
M. Awalludin ◽  
Mohamad Hafiz Mamat ◽  
Mohd Zainizan Sahdan ◽  
Z. Mohamad ◽  
Mohamad Rusop
Keyword(s):  
Electron Microscopy ◽  
Zinc Oxide ◽  
Immersion Time ◽  
Sol Gel ◽  
Zno Nanorods ◽  
Zinc Oxide Nanorods ◽  
Immersion Method ◽  
X Ray ◽  
Oxide Nanorods ◽  
Scanning Electron

This paper focus on zinc oxide (ZnO) nanorods prepared using sol-gel immersion method immersed at different time. Immersion times have been varied 1~24 hr and the characteristics of each sample have been observed. The effects of immersion time on ZnO nanorods thin films have been studied in surface morphology and structural properties using Scanning Electron Microscopy (SEM) and X-ray diffractometer (XRD), respectively.

Two-Photon Excited Ultraviolet Photoluminescence of Zinc Oxide Nanorods

2008 ◽  
Vol 8 (11) ◽  
pp. 5854-5857 ◽  
Author(s):  
Guangping Zhu ◽  
Chunxiang Xu ◽  
Jing Zhu ◽  
Changgui Lu ◽  
Yiping Cui ◽  
...  
Keyword(s):  
Zinc Oxide ◽  
Emission Band ◽  
Single Photon ◽  
Zno Nanorods ◽  
Zinc Oxide Nanorods ◽  
Excitation Wavelength ◽  
Photoluminescence Intensity ◽  
Vapor Phase Transport ◽  
Two Photon ◽  
Oxide Nanorods

High density zinc oxide nanorods with uniform size were synthesized on (100) silicon substrate by vapor-phase transport method. The scanning electron microscopy images reveal that the nanorods have an average diameter of about 400 nm. The X-ray diffraction pattern demonstrates the wurtzite crystalline structure of the ZnO nanorods growing along [0001] direction. The single-photon excited photoluminescence presents a strong ultraviolet emission band at 394 nm and a weak visible emission band at 600 nm. When the ZnO nanorods were respectively pumped by various wavelength lasers from 520 nm to 700 nm, two-photon excited ultraviolet photoluminescence was observed. The dependence of the two-photon excited photoluminescence intensity on the excitation wavelength and power was investigated in detail.

Optical fiber coated with zinc oxide nanorods toward light side coupling for sensing application

Nano-Optics ◽  
2020 ◽  
pp. 293-304
Author(s):  
Hazli Rafis Abdul Rahim ◽  
Siddharth Thokchom ◽  
Waleed Soliman Mohammed ◽  
Joydeep Dutta ◽  
Sulaiman Wadi Harun
Keyword(s):  
Zinc Oxide ◽  
Optical Fiber ◽  
Zinc Oxide Nanorods ◽  
Oxide Nanorods ◽  
Sensing Application ◽  
Light Side ◽  
Side Coupling

scholarly journals Active Role of ZnO Nanorods in Thermomechanical and Barrier Performance of Poly(vinyl alcohol-co-ethylene) Formulations for Flexible Packaging

Polymers ◽  
2019 ◽  
Vol 11 (5) ◽  
pp. 922 ◽  
Author(s):  
Francesca Luzi ◽  
Alessandro Di Michele ◽  
Luigi Torre ◽  
Debora Puglia
Keyword(s):  
Zinc Oxide ◽  
Vinyl Alcohol ◽  
Zno Nanorods ◽  
Accelerated Aging ◽  
Active Role ◽  
Zinc Oxide Nanorods ◽  
Poly Vinyl Alcohol ◽  
Accelerated Aging Test ◽  
Aging Test ◽  
Oxide Nanorods

Poly(vinyl alcohol-co-ethylene) (EVOH) films containing zinc oxide nanorods (ZnO Nrods) at 0.1, 0.5, and 1 wt%, were realized by solvent casting. The effect of ZnO Nrods content on morphological, thermal, optical, mechanical, and oxygen permeability properties were analyzed. In addition, moisture content and accelerated-aging test studies were performed, with the intention to determine the influence of zinc oxide nanofillers on the functional characteristics of realized packaging systems. Tensile properties showed increased values for strength and deformation-at-break in EVOH-based formulations reinforced with 0.1 and 0.5 wt% of zinc oxide nanorods. Results from the colorimetric and transparency investigations underlined that the presence of ZnO Nrods in EVOH copolymer did not induce evident alterations. In addition, after the accelerated-aging test, the colorimetric test confirmed the possibility for these materials to be used in the packaging sector. This behavior was induced by the presence of zinc oxide nanofillers that act as a UV block that made them useful as an efficient absorber of UV radiation.

Optical Properties of Al Doped Zinc Oxide Nanorods Thin Film Deposited by Immersion Technique

2013 ◽  
Vol 667 ◽  
pp. 388-392
Author(s):  
S.Z. Muhamed ◽  
Mohamad Hafiz Mamat ◽  
Mohamad Rusop
Keyword(s):  
Thin Film ◽  
Zinc Oxide ◽  
Electrical Properties ◽  
Surface Morphology ◽  
Immersion Time ◽  
Zno Nanorods ◽  
Zinc Oxide Nanorods ◽  
Oxide Nanorods ◽  
Immersion Technique ◽  
Doped Zno

We investigated the effect of immersion time on optical, electrical properties and surface morphology of nanostructured Aluminium (Al) doped Zinc Oxide (ZnO) thin films prepared by immersion technique. UV-Vis-NIR spectra indicate that the transmittance of the samples decrease with immersion time. Electrical properties study reveals the nanostructured Al doped ZnO thin film at 1 hr shows the lowest resistivity compared to other samples. Surface morphology results as characterized by scanning electron microscope (SEM) show that the Al doped ZnO nanorods quantity increased with immersion time.

scholarly journals Investigation of Angiogenesis and Wound Healing Potential Mechanisms of Zinc Oxide Nanorods

2021 ◽  
Vol 12 ◽  
Author(s):  
Amr Hassan ◽  
Ahmed I. Abd El Maksoud ◽  
Dalia Elebeedy ◽  
Mohammad A. Zoair ◽  
Emadeldin R. Matar
Keyword(s):  
Wound Healing ◽  
Zinc Oxide ◽  
Zno Nanorods ◽  
Chorioallantoic Membrane ◽  
Zinc Oxide Nanorods ◽  
Vegf Expression ◽  
Angiogenic Potential ◽  
Oxide Nanorods ◽  
Angiogenesis Process ◽  
Chorioallantoic Membrane Assay

The angiogenesis process is an essential issue in tissue engineering. Zinc oxide nanorods are biocompatible metals capable of generating reactive oxygen species (ROS) that respond to induced angiogenesis through various mechanisms; however, released Zn (II) ions suppress the angiogenesis process. In this study, we fabricated green ZnO nanorods using albumin eggshell as a bio-template and investigate its angiogenic potential through chorioallantoic membrane assay and excision wound healing assay. This study demonstrated that angiogenesis and wound healing processes depend on pro-angiogenic factors as VEGF expression due to ZnO nanorods' exiting. Angiogenesis induced via zinc oxide nanorods may develop sophisticated materials to apply in the wound healing field.

Low-Temperature Cathodoluminescence Investigations of High-Quality Zinc Oxide Nanorods

2015 ◽  
Vol 21 (3) ◽  
pp. 564-569 ◽  
Author(s):  
Bartlomiej S. Witkowski ◽  
Lukasz Wachnicki ◽  
Sylwia Gieraltowska ◽  
Anna Reszka ◽  
Bogdan J. Kowalski ◽  
...  
Keyword(s):  
Zinc Oxide ◽  
Radiation Effects ◽  
Zno Nanorods ◽  
Zinc Oxide Nanorods ◽  
Nanorod Arrays ◽  
High Quality ◽  
Sem Images ◽  
Oxide Nanorods ◽  
Very High

AbstractWe present results of cathodoluminescence (CL) investigations of high-quality zinc oxide (ZnO) nanorods obtained by an extremely fast hydrothermal method on a silicon substrate. A scanning electron microscopy (SEM) system equipped with CL allows direct comparison of SEM images and CL maps, taken from exactly the same areas of samples. Investigations are performed at a temperature of 5 K. An interlink between sample microstructure and emission properties is investigated. CL confirms a very high quality of ZnO nanorods produced by our method. In addition, the presence of super radiation effects in ZnO nanorod arrays is suggested.

Growth of Arrayed ZnO Nanorods from Aqueous Solution at 60°C

2010 ◽  
Vol 123-125 ◽  
pp. 691-694
Author(s):  
Gang Qiang Yang ◽  
Xiao Ping Zou ◽  
Xiang Min Meng ◽  
Gong Qing Teng ◽  
Jin Cheng ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Zinc Oxide ◽  
Low Temperature ◽  
Zno Nanorods ◽  
The Other ◽  
Zinc Oxide Nanorods ◽  
Zno Films ◽  
Growth Mechanisms ◽  
Oxide Nanorods ◽  
Zno Particles

In this paper, zinc oxide nanorods were prepared on many different substrates in the aqueous solution without adding alkali solution at 60°C. A layer of ZnO particles as the seeds for the growth were not needed to be coated on the substrates beforehand. A higher uniform and denser packed array of hexagonal ZnO nanorods forms on the glass substrate than that on the other substrates in our experiments. This technique is applicable for the preparation and patterning of functional ZnO films at low temperature. The growth mechanisms of the as-synthesized ZnO nanorods were also proposed.

Structural Properties of Stannic Oxide Coated Aluminium-Doped Zinc Oxide Nanorods

2015 ◽  
Vol 1109 ◽  
pp. 476-480
Author(s):  
Ahmad Syakirin Ismail ◽  
Mohd Firdaus Malek ◽  
Muhammad Amir Ridhwan Abdullah ◽  
Mohamad Hafiz Mamat ◽  
M. Rusop
Keyword(s):  
Zinc Oxide ◽  
Structural Properties ◽  
Sol Gel ◽  
Zno Nanorods ◽  
Oxide Coating ◽  
Zinc Oxide Nanorods ◽  
Stannic Oxide ◽  
Immersion Method ◽  
Force Microscopy ◽  
Atomic Force

Aluminium (Al) - doped zinc oxide (ZnO) nanorods was deposited using sol-gel immersion method. To study the effect of stannic oxide coating (SnO2) on the structural properties of the ZnO nanorods, SnO2with different layers were deposited on the top of ZnO nanorods, from 1 to 5 layers. The structural properties of the samples have been characterized using field emission scanning electron microscopy (FESEM), atomic force microscopy and x-ray diffraction (XRD). The analyses showed that by increasing the deposited layer, the surface roughness of the samples reduced and also reduced the porosity of the surface.

TYROSINASE BIOSENSOR BASED ON ZINC OXIDE NANORODS

NANO ◽  
2007 ◽  
Vol 02 (05) ◽  
pp. 281-284 ◽  
Author(s):  
L. Y. CHEN ◽  
B. X. GU ◽  
G. P. ZHU ◽  
Y. F. WU ◽  
S. Q. LIU ◽  
...  
Keyword(s):  
Zinc Oxide ◽  
Zno Nanorods ◽  
Electrochemical Measurement ◽  
Sem Analysis ◽  
Zinc Oxide Nanorods ◽  
Electron Microscopic ◽  
Vapor Phase Transport ◽  
Oxide Nanorods ◽  
Vapor Phase Transport Method ◽  
Chemical Purity

A phenol biosensor based on the skillful immobilization of tyrosinase on zinc oxide ( ZnO ) nanorods was proposed. The ZnO nanorods fabricated by a simple vapor-phase transport method possess a high aspect ratio, good electron communication, chemical purity, smooth and positive charged surface and are ready for immobilization of biochemicals with low isoelectric point (IEP). Electrochemical measurement and Scanning Electron Microscopic (SEM) analysis showed that the enzyme of tyrosinase with IEP 4.5 can be adsorbed on the surface of ZnO nanorods and kept its bioactivity of the oxidation of phenol to a large extent. This led us to develop phenol biosensor with good stability and reproducibility. The proposed method creates a new way to develop biosensors using nanostructured materials with high IEP.

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