Electrochemical Synthesis for Uniform and Large-Scale Zinc Oxide Nano Structure Films

2011 ◽  
Vol 194-196 ◽  
pp. 429-435
Author(s):  
Wen Zhang ◽  
Yong Ning He ◽  
Wu Yuan Cui ◽  
Cheng Bo Zhou
Keyword(s):  
Electron Microscopy ◽  
Zinc Oxide ◽  
Indium Tin Oxide ◽  
Large Scale ◽  
Deposition Time ◽  
Zno Films ◽  
Nano Structure ◽  
Zno Nanostructure ◽  
Ito Glass ◽  
Flake Structure

Three different kinds of zinc oxide (ZnO) nanostructure films have been synthesized on an indium tin oxide (ITO) glass substrate by electrochemical method with adjusting the concentration of the electrolyte, deposition time and temperature. X-ray diffraction (XRD), scanning electron microscopy (SEM), high resolution transmission electron microscopy (HR-TEM) and photoluminescence (PL) spectrum have been used to determine the characteristics of these nanostructures. The results show that concentration of the electrolyte is one of the most important factors that determine the morphologies of ZnO films. Nanobuds, nanorods, flakes are obtained with the electrolyte concentration increasing. Nanobuds and nanorods have no significant changes with the deposition time prolonged while the flakes grow bigger and thicker. The flakes merge together at high temperature while nanobuds remain unchanged except getting larger and sparser. Nanobuds and nanorods show single crystal patterns while the flakes are composted by multi crystals. The reasons forming such different morphology were discussed according to crystal growth theory. The PL spectra of these ZnO films are quite different according to various microstructures. The film with flake structure has a significant widen near edge emission peak with the depressed visible emission, which may have potential applications on optoelectronic devices and sensors.

Analysis of Sputtered Zinc Oxide Films

1980 ◽  
Vol 38 ◽  
pp. 416-417
Author(s):  
T. A. Emma ◽  
M. P. Singh
Keyword(s):  
Electron Microscopy ◽  
Zinc Oxide ◽  
Piezoelectric Materials ◽  
Oxide Films ◽  
Optical Quality ◽  
Zno Films ◽  
Rf Power ◽  
X Ray Diffraction ◽  
Sputtered Films ◽  
Zinc Oxide Films

Optical quality zinc oxide films have been characterized using reflection electron diffraction (RED), replication electron microscopy (REM), scanning electron microscopy (SEM), and X-ray diffraction (XRD). Significant microstructural differences were observed between rf sputtered films and planar magnetron rf sputtered films. Piezoelectric materials have been attractive for applications to integrated optics since they provide an active medium for signal processing. Among the desirable physical characteristics of sputtered ZnO films used for this and related applications are a highly preferred crystallographic texture and relatively smooth surfaces. It has been found that these characteristics are very sensitive to the type and condition of the substrate and to the several sputtering parameters: target, rf power, gas composition and substrate temperature.

Characteristics of Zinc Oxide Film Prepared by Chemical Bath Deposition Method

2014 ◽  
Vol 602-603 ◽  
pp. 871-875
Author(s):  
Yen Pei Fu ◽  
Jian Jhih Chen
Keyword(s):  
Thin Film ◽  
Zinc Oxide ◽  
Chemical Bath Deposition ◽  
Deposition Time ◽  
Oxide Films ◽  
Hexagonal Structure ◽  
Zno Films ◽  
Zinc Oxide Film ◽  
Incident Wavelength ◽  
Zinc Oxide Films

In this study, ZnO films, prepared by Chemical Bath Deposition (CBD), are applied as the conductive layers for thin film solar cells. Zinc acetate is used as a source of zinc, and different proportions of ammonia solution are added and well mixed. The growth of zinc oxide films in reaction solutions is taken place at 80°C and then heated to 500°C for one hour. In this study, the different ammonia concentrations and deposition times is controlled. The thin film structure is Hexagonal structure, which is determined by X-ray diffraction spectrometer (XRD) analysis. Scanning electron microscopy (SEM) is used as the observation of surface morphology, the bottom of the film is the interface where the heterogeneous nucleation happens. With the increase of deposition time, there were a few attached zinc oxide particles, which is formed by homogeneous nucleation. According to UV / visible light (UV / Vis) absorption spectrometer transmittance measurements and the relationship between/among the incident wavelength, it can be converted to the energy gaps (Eg), which are about 3.0 to 3.2eV, by using fluorescence spectroscopy analysis. The emission of zinc oxide films has two wavelengths which are located on 510nm and 570nm. According to Based on the all analytic results, the ammonia concentration at 0.05M, and the deposition time is 120 minutes, would obtain the conditions of ZnO films which is more suitable for applications of conductive layer material in thin film solar cell.

scholarly journals Synthesis and characterization of graphene oxide flakes for transparent thin films

2021 ◽  
Vol 22 (3) ◽  
pp. 595-601
Author(s):  
R.G. Abaszade ◽  
S.A. Mamedova ◽  
F.G. Agayev ◽  
S.I. Budzulyak ◽  
O.A. Kapush ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Graphene Oxide ◽  
Indium Tin Oxide ◽  
Electromagnetic Interference ◽  
Large Scale ◽  
X Ray Diffraction ◽  
Scanning Calorimetry ◽  
X Ray ◽  
Scanning Electron

We have synthesized large scale, thin, transparent graphene oxide (GO) flakes by Hummer’s method and investigated their suitability for fabrication of transparent nanocomposites. The GO flakes were comprehensively characterized by X-ray diffraction, Scanning Electron Microscopy (SEM), Energy Dispersive X-ray analysis (EDX), Raman spectroscopy and Differential Scanning Calorimetry (DSC). X-ray diffraction displayed the peak of graphene oxide at 9°degree, which is characteristic peak of GO in agreement with the literature results. Scanning Electron Microscopy images revealed that thin, transparent, flake form GO with 14,8 µm lateral size and 0,31µm thickness were synthesized. The comparison with literature results show that for the first time, our group could synthesize large scale, thin and more transparent GO flakes by simple Hummer’s method using simple dispersed graphite. EDX measurements indicate the formation of layered structure with oxygen containing functional groups. The intensity ratio between D and G peaks in the Raman spectra proves that less defective GO flakes have been synthesized. The solution ability of the synthesized material indicate that high quality GO flakes were synthesized, which make them effective soluble material due to oxygen containing groups formed on the graphene plane during synthesis process.DSC results shows that these flakes are thermally stable till 200°C.  Due to high solubility properties, large scale and transparency they can be very useful in fabrication of high optical transparent nanocompoties for replacement indium tin oxide transparent conductors in solar panels, biomedical applications and microwave absorbers for electromagnetic interference (EMI) environmental protection.

scholarly journals Synthesis of Ni-Doped ZnO Nanorod Arrays by Chemical Bath Deposition and Their Application to Nanogenerators

Energies ◽  
2020 ◽  
Vol 13 (11) ◽  
pp. 2731 ◽  
Author(s):  
Yen-Lin Chu ◽  
Sheng-Joue Young ◽  
Liang-Wen Ji ◽  
Tung-Te Chu ◽  
Po-Hao Chen
Keyword(s):  
Chemical Bath Deposition ◽  
Indium Tin Oxide ◽  
Electron Beam Evaporation ◽  
Zno Films ◽  
X Ray Diffraction ◽  
Glass Substrates ◽  
Ito Glass ◽  
Evaporation Technique ◽  
Doped Zno ◽  
Cbd Method

Nanogenerators (NGs) based on Ni-doped ZnO (NZO) nanorod (NR) arrays were fabricated and explored in this study. The ZnO films were grown on indium tin oxide (ITO) glass substrates, and the NZO NRs were prepared by the chemical bath deposition (CBD) method. The samples were investigated via field-emission scanning electron microscopy (FE-SEM) and X-ray diffraction (XRD) spectral analysis. The results showed that the growth of NRs presented high-density single crystalline structures and were preferentially oriented in the c-axis direction. The optical characteristics of the NZO NRs were also measured by photoluminescence (PL) spectra. All samples exhibited two different emissions, including ultraviolet (UV) and green emissions. ITO etching paste was used to define patterns, and an electrode of Au film was evaporated onto the ITO glass substrates by the electron beam evaporation technique to assemble the NG device. In summary, ZnO NRs with Ni dopant (5 mM) showed significantly excellent performance in NGs. The optimal measured voltage, current, and power for the fabricated NGs were 0.07 V, 10.5 µA, and 735 nW, respectively.

scholarly journals Plasma Synthesis of Advanced Metal Oxide Nanoparticles and Their Applications as Transparent Conducting Oxide Thin Films

Molecules ◽  
2021 ◽  
Vol 26 (5) ◽  
pp. 1456
Author(s):  
Hong Yong Sohn ◽  
Arun Murali
Keyword(s):  
Zinc Oxide ◽  
Vapor Phase ◽  
Thermal Plasma ◽  
Indium Tin Oxide ◽  
Large Scale ◽  
Metal Oxide Nanoparticles ◽  
Transparent Conducting Oxide ◽  
Plasma Synthesis ◽  
Scale Production ◽  
Transparent Conducting

This article reviews and summarizes work recently performed in this laboratory on the synthesis of advanced transparent conducting oxide nanopowders by the use of plasma. The nanopowders thus synthesized include indium tin oxide (ITO), zinc oxide (ZnO) and tin-doped zinc oxide (TZO), aluminum-doped zinc oxide (AZO), and indium-doped zinc oxide (IZO). These oxides have excellent transparent conducting properties, among other useful characteristics. ZnO and TZO also has photocatalytic properties. The synthesis of these materials started with the selection of the suitable precursors, which were injected into a non-transferred thermal plasma and vaporized followed by vapor-phase reactions to form nanosized oxide particles. The products were analyzed by the use of various advanced instrumental analysis techniques, and their useful properties were tested by different appropriate methods. The thermal plasma process showed a considerable potential as an efficient technique for synthesizing oxide nanopowders. This process is also suitable for large scale production of nano-sized powders owing to the availability of high temperatures for volatilizing reactants rapidly, followed by vapor phase reactions and rapid quenching to yield nano-sized powder.

scholarly journals Construction of Sandwich-like Structured GO/Cu2O/GO Electrochemical Biosensor for Sensitive Detection of H2O2 Releasing from Living Cells

2020 ◽  
Author(s):  
Donghang Yin ◽  
Junyan Tang ◽  
Ruixue Mo ◽  
Fei Wang ◽  
Xiuzhi Jia ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Graphene Oxide ◽  
Indium Tin Oxide ◽  
High Performance ◽  
Limit Of Detection ◽  
A549 Cells ◽  
X Ray Diffraction ◽  
Long Term Stability ◽  
Transmission Electron ◽  
Ito Glass

Abstract A well-designed sandwich-like structure based on Cu2O nanocubes sandwiched between graphene oxide (GO) buffer layer was fabricated on indium tin oxide (ITO)/glass substrate via drop-casting method. The sandwich-like morphologies, GO/Cu2O/GO/ITO structures, were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM) and X-ray diffraction (XRD) measurements. Electrochemical studies demonstrated the fact that GO/Cu2O/GO/ITO electrode revealed the superior electro-catalytic activity and electrical conductivity as a result of the introduction of graphene oxide and formation of sandwich-like structures, which effectively improved the electrical performances of Cu2O-based sandwich structure in H2O2 detection. The proposed sandwich-like GO/Cu2O/GO/ITO sensor was experimentally optimized and displayed a widespread linear response in the range from 0.25 μM to 20 mM with a low limit of detection (LOD) of 0.2 μM (S/N=3) in H2O2 sensing. Besides achieving acceptable selectivity, excellent reproducibility, and long-term stability of sandwich-like lamellar structures, GO/Cu2O/GO/ITO sensor exhibited high performance in detecting H2O2 released from A549 cells. Therefore, the novel sandwich-like GO/Cu2O/GO/ITO sensor provides an economical, potent and high-throughput platform for detecting various species involving H2O2-generation reactions for biomedical applications.

Transparent and Compact Zinc Oxide Thin Films via Two-Step Electrodeposition from Aqueous Solution

2007 ◽  
Vol 336-338 ◽  
pp. 2221-2223
Author(s):  
Fang Peng ◽  
Xiao Min Li ◽  
Xiang Dong Gao
Keyword(s):  
Aqueous Solution ◽  
Zinc Oxide ◽  
Optical Band Gap ◽  
Zinc Nitrate ◽  
Zno Films ◽  
Zno Film ◽  
Electrodeposition Process ◽  
Zinc Oxide Films ◽  
Ito Glass ◽  
Galvanostatic Deposition

Zinc oxide films have been deposited on ITO/glass substrate by a two-step electrodeposition method from zinc nitrate aqueous solution. The two-step electrodeposition process included a potentiostatic pre-deposition and a galvanostatic deposition. Obtained ZnO film possesses high c-axis preferential orientation, smooth and compact morphology, high transmittance in the visible band, and optical band gap of 3.43eV. Compared with the film prepared by direct galvanostatic deposition, the crystalline quality and optical properties of ZnO films were significantly improved.

scholarly journals Zinc oxide films grown by galvanic deposition from 99% metals basis zinc nitrate electrolyte

2014 ◽  
Vol 2 (25) ◽  
pp. 9626-9635 ◽  
Author(s):  
S. Calnan ◽  
W. Riedel ◽  
S. Gledhill ◽  
B. Stannowski ◽  
R. Schlatmann ◽  
...  
Keyword(s):  
Zinc Oxide ◽  
Cost Saving ◽  
Large Scale ◽  
Zinc Nitrate ◽  
Zno Films ◽  
Scale Production ◽  
Zinc Oxide Films ◽  
Large Scale Production ◽  
Galvanic Deposition ◽  
The Cost

The use of relatively low purity zinc nitrate for electrochemical deposition of compact ZnO films is attractive for large scale production because of the cost saving potential.

Fabrication of Electrochemical Biosensor Using Zinc Oxide Nanoflowers for the Detection of Uric Acid

2021 ◽  
Author(s):  
priyanka dutta ◽  
Vikas sharma ◽  
Hema bhardwaj ◽  
ved varun agrawal ◽  
Rajesh nil ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Zinc Oxide ◽  
Uric Acid ◽  
Indium Tin Oxide ◽  
Electrochemical Biosensor ◽  
Limit Of Detection ◽  
Hydrothermal Process ◽  
High Sensitivity ◽  
Label Free ◽  
Ir Study

Abstract A label-free electrochemical biosensor has been developed using Zinc Oxide nanoflowers (ZnONFs) for the detection of Uric acid. ZnONFs have been synthesized by hydrothermal process and characterized with several techniques such as Ultraviolet-Visible spectroscopy, Fourier Transform Infrared Spectroscopy (FT-IR) study, X-ray diffraction study, Raman spectroscopy, Scanning Electron Microscopy and High-Resolution Transmission Electron Microscopy (HR-TEM) and electrochemical analyser to confirms the formation of nanoflowers and fabrication of electrode and bioelectrodes for uric acid detection. Pure and uniform needle flowers and deposited onto Indium Tin Oxide (ITO) substrate through electrophoretic deposition technique. Further, electrochemical studies have been performed with immobilized enzymatic bioelectrode followed by various uric acid concentrations. It has been found that the fabricated biosensor shows high sensitivity (10.38 µA/ mg/mL /cm2) and a limit of detection of 0.13 mg/mL in the range of 0.005 to 1.0 mg/mL. This study demonstrates the potential use of ZnONFs for the construction of overly sensitive biosensors for Uric acid detection.

scholarly journals Synthesis of Zinc Oxide Nanostructure by Chemical Bath Deposition (CBD) Method: Influence of Growth Time towards Nanostructure Characteristics

2019 ◽  
Vol 8 (4) ◽  
pp. 6891-6896
Keyword(s):  
Zinc Oxide ◽  
Chemical Bath Deposition ◽  
Indium Tin Oxide ◽  
Morphological Changes ◽  
Structural Characteristics ◽  
Ultra Violet ◽  
Vital Role ◽  
Growth Time ◽  
Zno Nanostructures ◽  
Zno Nanostructure

Growth of zinc oxide (ZnO) nanostructure on seeded indium tin oxide (ITO) via chemical bath deposition were presented in this study. Growth time is believed to have vital role in order to control the physical (morphology), optical and structural characteristics of ZnO nanostructures. Several growth time of ZnO nanostructure were varied (1 H – 3.5 H) as the purpose to investigate its effect towards the growth of ZnO nanostructures, as well as their characteristics. In this study, the influence of growth time was determined using field emission scanning electron microscope (FESEM), ultra-violet visible spectrometer (UV-Vis) and x-ray diffraction (XRD). Based on the results obtained, morphological, optical and structural characteristics of ZnO nanostructure thin films grown at various growth time present different characteristics and properties. According to the results obtained, it is proved that growth time is a vital parameter to control the ZnO nanostructure growing process. ZnO nanostructure morphological changes significantly with the changes of the growing time process. As well as optical properties, the changes of absorbance and transmittance value influence the optical energy band gap of ZnO nanostructure in this study, which is the average value is 3.31 -3.40 eV. The structural characteristic of the ZnO nanostructure also affected significantly with the difference of growth time, where the crystallinity is improved with the longer growth time.

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