scholarly journals Synthesis and Characterization of Zinc Oxide Nanoparticles Using Moringa Leaf Extract

2021 ◽  
Vol 2021 ◽  
pp. 1-6
Author(s):  
Saka Abel ◽  
Jule Leta Tesfaye ◽  
Nagaraj Nagaprasad ◽  
R. Shanmugam ◽  
L. Priyanka Dwarampudi ◽  
...  
Keyword(s):  
Zinc Oxide ◽  
Pathogenic Bacteria ◽  
Negative Impact ◽  
Visible Region ◽  
Cost Effective ◽  
Wide Bandgap ◽  
Uv Visible ◽  
Zn Ions ◽  
And Staphylococcus Aureus

This paper investigates the technique of biosynthesis of nanoparticles of zinc oxide from the extraction of moringa leaves. Many researchers recognize the use of this method of green culinary technique because it is cost-effective and has no negative impact on the environment; however, this paper focuses on the bacteria chosen for the green synthesis, which was not addressed by many of the researchers. The firmness and reduction of Zn ions in nanoparticles of zinc oxide were analyzed with a UV-visible spectroscope. Its results show that a wide bandgap was observed in the visible region at a wavelength of 350 nanometers. Extraction of moringa leaves serves as a promising agent for the balance of particle size. The result of medical value shows significant antibacterial activity in contrast to the type of pathogenic bacteria Escherichia coli and Staphylococcus aureus. From the XRD results, there are no further peaks that correspond to impurities that are discovered, demonstrating the great purity of the provided results.

Eco-Friendly Green Synthesis of MgO Nanoparticles from Zingiber Officinale(Ginger) Root Extract and its Antibacterial Application

2021 ◽  
Vol 9 (VI) ◽  
pp. 4219-4222
Author(s):  
R. D. More
Keyword(s):  
Green Synthesis ◽  
Pathogenic Bacteria ◽  
Visible Region ◽  
Cost Effective ◽  
Zingiber Officinale ◽  
Band Gap Energy ◽  
Root Extract ◽  
Mgo Nanoparticles ◽  
Medicinal Value ◽  
Uv Visible

In this study preparation of MgO nanoparticles using Zingiber officinale (ginger) aqueous root extract by using green method. The green synthesis approaches are recognized by many scientists due to its cost effective, simple, eco-friendly. The stability and reduction of Mg+2 ions to MgO nanoparticles were characterized by UV-Visible spectroscopic analysis. From UV-Visible spectroscopy, higher band gap energy of 7.8 eV is obtained in the near visible region at the wavelength of 300 nm. The Zingiber officinale (ginger) root extract act as reducing agent for stabilization of particle size as well as medicinal value result showed a significant antibacterial activity against pathogenic bacteria, E.Coli.and S.aureus. The present investigation deals with the green synthesis of MgO nanoparticles and its antibacterial effect on selected bacteria.

Characterization of Transparent Conducting Pulsed Laser Deposited Films in the Indium Zinc Oxide System

1998 ◽  
Vol 547 ◽  
Author(s):  
A. Rougier ◽  
N. Naghavi ◽  
C. Marcel ◽  
F. Portemer ◽  
L. Dupont ◽  
...  
Keyword(s):  
Thin Films ◽  
Zinc Oxide ◽  
Visible Region ◽  
Pulsed Laser ◽  
Oxide System ◽  
Optical Measurements ◽  
K Value ◽  
Indium Zinc Oxide ◽  
Average Transmittance

AbstractThin films of indium zinc oxide so called IZO were prepared with pulsed laser deposition. It was found that the crystalline structure, the composition and the morphology of the films as well as the optical and electrical properties were quite sensitive to the deposition conditions namely to the temperature and oxygen pressure. The crystallinity of the ZnkIn2O3+k (k from 1 to 5) thin films increases as the substrate temperature increases. An average transmittance of 85 % in the visible region was obtained for any k values. Optical measurements show a continuous decrease of the band gap as the zinc amount increases. The highest conductivity reported is for the ZnIn2O4, thin films deposited at 300 °C (σ = 1.2 103 S/cm). Increasing the amount of Zn (i.e. k value) was found to result in a conductivity decrease. Finally, a good correlation between the electric mobility and the optical mobility is obtained.

Improved High Precision Dopant/Carrier Concentration Profiling with Corona-Charge Non-Contact C-V (CnCV)

2020 ◽  
Vol 1004 ◽  
pp. 237-242
Author(s):  
Alexandre Savtchouk ◽  
Marshall Wilson ◽  
John D’Amico ◽  
Carlos Almeida ◽  
Jacek Lagowski
Keyword(s):  
Dopant Concentration ◽  
Depth Profiling ◽  
Extreme Case ◽  
Cost Effective ◽  
Wide Bandgap ◽  
Fully Depleted ◽  
Device Development ◽  
Bandgap Semiconductors

We report significant advancements in corona-based non-contact capacitance-voltage (CnCV) metrology recently developed for comprehensive C-V characterization of SiC and other wide bandgap semiconductors. The technique answers the industries needs for nondestructive, cost-effective C-V dopant monitoring for material and device development and manufacturing control. Excellent precision and matching to mercury probe CV is demonstrated for SiC, Ga2O3, GaN and AlGaN/GaN structures over a concentration range from 1014cm-3 to 2x1019cm-3. The emphasis in the present work is on improvement of CnCV in dopant depth profiling resolution and measurement throughout. This is achieved with a variable charge method that in-situ adjusts corona charging increments in response to changes in dopant concentration. Results are presented for multi-layer epitaxial SiC and for 2DEG in AlGaN/GaN HEMT structures. The latter represents an extreme case of high-low concentration profiling with a transition from 1020electrons/cm-3 in the 2D electron gas to a fully depleted well and dopant concentration in the 1015cm-3 range.

scholarly journals Green Synthesis and Characterizations of Zinc Oxide (ZnO) Nanoparticles Using Aqueous Leaf Extracts of Coffee (Coffea arabica) and Its Application in Environmental Toxicity Reduction

2021 ◽  
Vol 2021 ◽  
pp. 1-6 ◽  
Author(s):  
Saka Abel ◽  
Jule Leta Tesfaye ◽  
R. Shanmugam ◽  
L. Priyanka Dwarampudi ◽  
Gudeta Lamessa ◽  
...  
Keyword(s):  
Zinc Oxide ◽  
Green Synthesis ◽  
Visible Region ◽  
Band Gap Energy ◽  
Sem Analysis ◽  
Zno Nps ◽  
Leaf Extracts ◽  
Toxicity Reduction ◽  
Medicinal Value ◽  
Uv Visible

A green deposition method of zinc oxide nanoparticles using coffee leaf extraction was successfully prepared. The use of these preparation techniques is accepted by many researchers because it is nonexpensive and simple and has no environmental impact during the operation. The determination and reduction of Zn ions to ZnO NPs were characterized by using a UV-visible spectroscope. The UV-visible spectroscopy result reveals that the large band gap energy is observed in the visible region at the wavelength of 300 nm. X-ray diffraction and SEM analysis confirm that the deposited nanoparticle is highly crystalline with (111), (222), and (100) planes and cubic shape structure. The coffee leaf extraction serves as a reducing agent for stability of the particle length, where its medicinal value outcome showed an important antibacteria of the pathogenic type which appeared on the wound. The present research deals with the green synthesis of ZnO NPs as well as its application in toxicity reduction.

scholarly journals Green Synthesis, Characterization and Antimicrobial Activity of Zinc Oxide Nanoparticles Using Root Extract of Viola canescens Wall. ex. Roxb.

2019 ◽  
Vol 31 (3) ◽  
pp. 551-554 ◽  
Author(s):  
Arun Kumar Khajuria ◽  
Abha Negi ◽  
N.S. Bisht ◽  
V. Maurya ◽  
Anuj Kandwal
Keyword(s):  
Zinc Oxide ◽  
Zinc Oxide Nanoparticles ◽  
Cost Effective ◽  
Zinc Nitrate ◽  
Oxide Nanoparticles ◽  
Root Extract ◽  
Green Approach ◽  
Uv Visible ◽  
Average Size ◽  
Nano Size

Stable zinc oxide nanoparticles were synthesized by using green approach of nanotechnology. The present investigation aimed to synthesize, stable, cost effective, rapid, eco-friendly approach for the bio-reduction of zinc nitrate hexahydarate to their nano size using phytochemicals present in the root extract of Viola canescens. The synthesized nanoparticles were further characterized by UV-visible, XRD, FTIR, SEM techniques and tested against the Gram-negative and Gram-positive pathogenic cultures of bacteria. The average size of synthesized nanoparticles was less than 11 nm with hexagonal morphology. The clear zone of inhibition against tested bacteria showed their capability as antimicrobial agent.

scholarly journals Synthesis and Spectral Characterization of D-A Based Cyano-Stilbene Derivatives for Organic Solar Cell Applications

2019 ◽  
Vol 31 (10) ◽  
pp. 2337-2340
Keyword(s):  
Organic Solar Cell ◽  
Visible Region ◽  
Organic Photovoltaic ◽  
High Power Conversion Efficiency ◽  
Broad Absorption ◽  
Donor Acceptor ◽  
Stilbene Derivatives ◽  
Ft Ir ◽  
Uv Visible

Ten donor-acceptor based (D-A) cyano-stilbene derivatives were synthesized and their structure was confirmed by 1H NMR, GC-MS, FT-IR. The absorption was calculated by UV-visible spectrometer. From the UV-Vis study, stilbenes are having broad and strong absorption in the UV-visible region. The strong and broad absorption in the UV-visible region is the desired property for the high power conversion efficiency organic photovoltaic cells.

Hydrothermal Synthesis and Characterization of Ho Doped Bi2MoO6 Nanoplates and their Optical Properties

2014 ◽  
Vol 931-932 ◽  
pp. 231-234 ◽  
Author(s):  
Anukorn Phuruangrat ◽  
Nuengruethai Ekthammathat ◽  
Budsabong Kuntalue ◽  
Phattharanit Dumrongrojthanath ◽  
Somchai Thongtem ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Optical Properties ◽  
Hydrothermal Reaction ◽  
Visible Region ◽  
X Ray ◽  
Selected Area Electron Diffraction ◽  
Transmission Electron ◽  
Uv Visible ◽  
Bending Modes

0–3 % Ho doped Bi2MoO6 samples were synthesized by hydrothermal reaction at 180 °C for 20 h. Their phase, morphologies, atomic vibration and optical properties were characterized by X-ray powder diffraction (XRD), Raman spectrophotometry, Fourier transform infrared (FTIR) spectroscopy, scanning electron microscopy (SEM), transmission electron microscopy (TEM), selected area electron diffraction (SAED) and UV-visible spectroscopy. In this research, the products were orthorhombic Bi2MoO6 nanoplates with asymmetric and symmetric stretching and bending modes of MoO6 octahedrons, and their strong absorption in the UV visible region.

scholarly journals Antibacterial Effect of Zinc Oxide Nanoparticles on Standard Strains and Isolates of Pseudomonas Aeruginosa and Staphylococcus Aureus

2020 ◽  
Vol 24 (3) ◽  
pp. 234-245
Author(s):  
Shima Naddafi ◽  
◽  
Alireza Partoazar ◽  
Zahra Dargahi ◽  
Mohammad Mehdi Soltan Dallal ◽  
...  
Keyword(s):  
Staphylococcus Aureus ◽  
Pseudomonas Aeruginosa ◽  
Zinc Oxide ◽  
Zinc Oxide Nanoparticles ◽  
Pathogenic Bacteria ◽  
Diffusion Method ◽  
Oxide Nanoparticles ◽  
Standard Strain ◽  
Wide Range ◽  
And Staphylococcus Aureus

Background: Studies have shown that metal nanoparticles are highly active and exhibits remarkable bactericidal activity against a wide range of bacteria. Objective: The aim of this study was to examine the antibacterial activity of zinc oxide nanoparticles against standard strains of Pseudomonas aeruginosa and Staphylococcus aureus and their isolates in food products. Methods: This experimental study was conducted on the two pathogenic bacteria and their two standard strains. Zinc oxide nanoparticles were prepared from zeolite and their amount was determined using the XRF analyzer. Minimum Inhibitory Concentration (MIC) and Minimum Bactericidal Concentration (MBC) were measured using disk diffusion method . Findings: The MIC value of zinc oxide nanoparticles was 4 mg/mL for standard strain and isolate of pseudomonas aeruginosa and 2 mg/mL for standard strain and isolate of staphylococcus aureus. The MBC values for standard strain and isolate of pseudomonas aeruginosa were 16 and 8 mg/mL, respectively, while for the standard strain and isolate of Staphylococcus aureus it was reported 8 mg/mL. Conclusion: Staphylococcus aureus is more sensitive to zinc oxide nanoparticles that pseudomonas aeruginosa.

Synthesis and Characterization of Transparent Glass-Ceramics in Na2O-CaO-SiO2 System

2011 ◽  
Vol 233-235 ◽  
pp. 1850-1853
Author(s):  
Zhuo Hao Xiao ◽  
Jun Hui Liao
Keyword(s):  
Visible Region ◽  
Glass Ceramics ◽  
Visible Spectrum ◽  
Matrix Glass ◽  
Transparent Glass ◽  
The Matrix ◽  
Crystal Type ◽  
Controlled Crystallization ◽  
Uv Visible

Glass in Na2O-CaO-SiO2 was synthesized by conventional molten cooling method and then converted to glass-ceramics. Transparent glass-ceramics obtained by controlled crystallization process. DSC, SEM and XRD were used to determine the character temperature, microstructure and crystal type of the glass-ceramics, respectively. The results show the transition temperature of the matrix glass is 620°C and crystallization peak temperature is 730°C. Only Na2Ca2Si3O9 crystal phase was found in the glass-ceramics when the matrix glass was treated at 750°C for 1h. The crystal with size of 0.5um arranged regularly and formed a honeycomb-like structure in the glass-ceramics. UV-visible spectrum test indicate the transmittance of the glass-ceramic is as high as 75% in the visible region.

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