Low Cost Environmental Sensors Using Zinc Oxide Nanowires and Nanostructures

2012 ◽  
Vol 1439 ◽  
pp. 139-144 ◽  
Author(s):  
Nima Mohseni Kiasari ◽  
Saeid Soltanian ◽  
Bobak Gholamkhass ◽  
Peyman Servati
Keyword(s):  
Zinc Oxide ◽  
Metal Oxide ◽  
High Performance ◽  
Low Cost ◽  
Chemical Vapor ◽  
Environmental Sensors ◽  
X Ray Diffraction ◽  
Zinc Oxide Nanowires ◽  
Oxide Nanowires ◽  
Current Voltage

ABSTRACTZinc oxide (ZnO) nanowires (NW) are grown on both silicon and sapphire substrates using conventional chemical vapor deposition (CVD) system. As-grown nanostructures are characterized by scanning electron microscope (SEM), X-ray diffraction (XRD) as well as energy dispersive spectroscopy (EDS) and the results confirm high-quality c-axis growth of single-crystalline zinc oxide nanowires. Nanowire are dispersed in solvent and then placed between micro-patterned gold electrodes fabricated on silicon wafers using low cost and scalable dielectrophoresis (DEP) process for fabrication of oxygen and humidity sensors. These sensors are characterized in a vacuum chamber connected to a semiconductor analyzer. Current-voltage characteristics of each device are systematically investigated under different hydrostatic pressure of various gaseous environments such as nitrogen, argon, dry and humid air. It is observed that the electrical conductivity of the nanowires is significantly dependent on the number of oxygen and water molecules adsorbed to the surface of the metal oxide nanowire. These results are critical for development of low cost metal oxide sensors for high performance ubiquitous environmental sensors of oxygen and humidity.

Controlled Synthesis of Oriented Zinc Oxide Nanowires Arrays by Electrochemical Deposition on Sputtered Layer

2021 ◽  
Vol 67 ◽  
pp. 15-24
Author(s):  
Lahcen Nkhaili ◽  
Abdelkader El Kissani ◽  
Hind El Aakib ◽  
Abderrahmane Abbassi ◽  
Abdelfattah Narjis ◽  
...  
Keyword(s):  
Zinc Oxide ◽  
Buffer Layers ◽  
Zinc Oxide Nanorods ◽  
X Ray Diffraction ◽  
Zinc Oxide Nanowires ◽  
Oxide Nanowires ◽  
Deposition Parameters ◽  
Oxide Nanorods ◽  
Diffraction Patterns ◽  
Frequency Power

In this study, dense zinc oxide nanowires were electrochemically synthesized on sputtered zinc oxide buffer layers substrates using a solution of zinc chloride as a precursor. The control of nanowires density was studied. X-Ray Diffraction patterns revealed the formation of pure wurtzite zinc oxide structure. The mechanism of the formation of zinc oxide nanorods from the nucleation to the growth stage is proposed based on the study of the deposition parameters. Optical analysis reveals that these films can be involved in solar cells as window layers. Moreover, controlling structural properties of the buffer is an excellent way to control the formation of nanorods during the nucleation step. In fact, Scanning Electronic Microscopy images and reflectometry analysis showed that the buffer layer consists of dense nanoparticles, with a density that increases by increasing the radiofrequency frequency power, This can be explained by the densification of the nanorods deposited thereon.

Hybrid ZnO/ZnO-NPs nanofibres fabricated via electrospinning

2019 ◽  
Vol 1-2 (94) ◽  
pp. 5-12
Author(s):  
W. Matysiak ◽  
M. Zaborowska
Keyword(s):  
Zinc Oxide ◽  
Zno Nanoparticles ◽  
Low Cost ◽  
Dye Sensitized Solar Cells ◽  
Chemical Vapour ◽  
Electrospinning Process ◽  
Zinc Oxide Nanowires ◽  
Ongoing Research ◽  
Oxide Nanowires ◽  
Scalable Production

Purpose: Due to the growing interest and multitude of possible applications, zinc oxide nanowires, including those doped with ZnO nanoparticles, can became, alongside carbon nanotubes, a very desirable material which use is predicted in the construction of nanogenerators, dye sensitized solar cells, optoelectronics or ultrasensitive gas detectors. Design/methodology/approach: The electrospinning process allows for low-cost and scalable production of fibrous mats with diameters from a few to several hundred nanometers. What is more, electrospinning method has gained popularity also due to its versatility, now it is possible to produce fibres from almost every known polymer and the simplicity and lack of any additional functionalization of the obtained nanomaterials. The application of the calcination process to remove the polymer matrix from the obtained nanofibres results in the creation of ceramic nanofibres. Findings: Among the existing methods for the production of ceramic nanostructures, including the hydrothermal, physical and chemical vapour deposition methods, nanolithography or molecular self-assembly, the electrospinning process creates the possibility of fabricating one-dimensional nanostructures with unprecedented properties, good quality, no additional functionalization and purification. Research limitations/implications: Due to ongoing research on the potential applications of zinc oxide nanostructures, including photovoltaics, sensorics and electronics, the most predictable behaviour and properties of ZnO nanowires characterize those nanomaterials that exhibit a periodic structure of the crystal lattice. Considering the optimization of the parameters of the method of producing ceramic zinc oxide nanowires doped with crystalline ZnO nanoparticles, it is worth analysing the thermal treatment parameters of nanofibres. Practical implications: Although amorphous structure, hybrid ZnO nanofibres could be used as humidity sensors with much higher sensing properties than crystalline ZnO nanostructures. Originality/value: Low-cost, scalable production of ceramic nanofibres for most technical applications.

Tailoring Zinc Oxide Nanowires for High Performance Amperometric Glucose Sensor

2007 ◽  
Vol 19 (9) ◽  
pp. 1008-1014 ◽  
Author(s):  
Jianfeng Zang ◽  
Chang Ming Li ◽  
Xiaoqiang Cui ◽  
Jianxiong Wang ◽  
Xiaowei Sun ◽  
...  
Keyword(s):  
Zinc Oxide ◽  
High Performance ◽  
Glucose Sensor ◽  
Zinc Oxide Nanowires ◽  
Oxide Nanowires ◽  
Amperometric Glucose Sensor

Determination of the epitaxial growth of zinc oxide nanowires on sapphire by grazing incidence synchrotron x-ray diffraction

2007 ◽  
Vol 90 (18) ◽  
pp. 181929 ◽  
Author(s):  
L. C. Campos ◽  
S. H. Dalal ◽  
D. L. Baptista ◽  
R. Magalhães-Paniago ◽  
A. S. Ferlauto ◽  
...  
Keyword(s):  
Zinc Oxide ◽  
Epitaxial Growth ◽  
Grazing Incidence ◽  
X Ray Diffraction ◽  
Zinc Oxide Nanowires ◽  
Oxide Nanowires ◽  
X Ray

Facile zinc oxide nanowire growth on graphene via a hydrothermal floating method: towards Debye length radius nanowires for ultraviolet photodetection

2017 ◽  
Vol 5 (38) ◽  
pp. 10087-10093 ◽  
Author(s):  
Brent Cook ◽  
Qingfeng Liu ◽  
Jianwei Liu ◽  
Maogang Gong ◽  
Dan Ewing ◽  
...  
Keyword(s):  
Zinc Oxide ◽  
High Performance ◽  
Debye Length ◽  
Nanowire Growth ◽  
Zinc Oxide Nanowires ◽  
Charge Mobility ◽  
Oxide Nanowires ◽  
High Charge ◽  
Zinc Oxide Nanowire

Heterojunction nanohybrid zinc oxide nanowires on graphene (ZnO-NW/graphene) combines crystalline ZnO-NWs with high charge mobility of graphene to provide a platform for high-performance devices.

Structure and Acetylene Sensing Behavior of Zinc Oxide Nanowires Based Gas Sensor

2014 ◽  
Vol 971-973 ◽  
pp. 165-169
Author(s):  
Qu Zhou ◽  
Wei Gen Chen ◽  
Shu Di Peng
Keyword(s):  
Zinc Oxide ◽  
Gas Sensor ◽  
High Performance ◽  
Zinc Acetate Dihydrate ◽  
Hydrothermal Process ◽  
Zinc Oxide Nanowires ◽  
Oxide Nanowires ◽  
Metal Oxide Nanostructures ◽  
Low Dimensional ◽  
Fault Characteristic

Low-dimensional semiconducting metal oxide nanostructures have gained great interest for developing high performance chemical gas sensors. In this study, we successfully synthesized quasi one-dimensional zinc oxide nanowires via a simple and facile hydrothermal process with zinc acetate dihydrate as precursor and polyethylene glycol as surfactant. The crystalline structures and microstructures of the as prepared samples were investigated by X-ray powder diffraction and field emission scanning electron microscopy, and a possible growth process was discussed in detail. Moreover, thick film gas sensor was fabricated with the as prepared nanowires and its sensing properties to acetylene gas, an important fault characteristic gases dissolved in oil-filled power equipments was measured.

Lithium-Doped Zinc Oxide Nanowires–Polymer Composite for High Performance Flexible Piezoelectric Nanogenerator

ACS Nano ◽  
2014 ◽  
Vol 8 (10) ◽  
pp. 10844-10850 ◽  
Author(s):  
Sung-Ho Shin ◽  
Young-Hwan Kim ◽  
Min Hyung Lee ◽  
Joo-Yun Jung ◽  
Jae Hun Seol ◽  
...  
Keyword(s):  
Zinc Oxide ◽  
Polymer Composite ◽  
High Performance ◽  
Zinc Oxide Nanowires ◽  
Oxide Nanowires

scholarly journals Bio-Separated and Gate-Free 2D MoS2 Biosensor Array for Ultrasensitive Detection of BRCA1

Nanomaterials ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 545
Author(s):  
Yi Zhang ◽  
Wei Jiang ◽  
Dezhi Feng ◽  
Chenguang Wang ◽  
Yi Xu ◽  
...  
Keyword(s):  
High Performance ◽  
Low Cost ◽  
Chemical Vapor ◽  
Signal Interference ◽  
Ultrasensitive Detection ◽  
Chemical Vapor Deposition Growth ◽  
Biosensor Array ◽  
Growth Method ◽  
Biological Modification ◽  
Biological Solutions

2D molybdenum disulfide (MoS2)-based thin film transistors are widely used in biosensing, and many efforts have been made to improve the detection limit and linear range. However, in addition to the complexity of device technology and biological modification, the compatibility of the physical device with biological solutions and device reusability have rarely been considered. Herein, we designed and synthesized an array of MoS2 by employing a simple-patterned chemical vapor deposition growth method and meanwhile exploited a one-step biomodification in a sensing pad based on DNA tetrahedron probes to form a bio-separated sensing part. This solves the signal interference, solution erosion, and instability of semiconductor-based biosensors after contacting biological solutions, and also allows physical devices to be reused. Furthermore, the gate-free detection structure that we first proposed for DNA (BRCA1) detection demonstrates ultrasensitive detection over a broad range of 1 fM to 1 μM with a good linear response of R2 = 0.98. Our findings provide a practical solution for high-performance, low-cost, biocompatible, reusable, and bio-separated biosensor platforms.

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