Connect with us

Material

Fabrication and characterization of nanostructured zinc oxide on printed microcontact electrode for piezoelectric applications

Publication date: November–December 2020

Source: Journal of Materials Research and Technology, Volume 9, Issue 6

Author(s): Shamsu Abubakar, Naimah Khalid, Siti Fatimah Abd Rahman, Tan Sin Tee, Mohd Nizar Hamidon, Zainal Abidin Talib, Suresh Sagadevan, Suriati Paiman

Republished by Plato

Published

on

open access

Abstract

Dynamic integration of aligned nanostructures fabricated on different surfaces has prompted the needs for a novel nanoelectromechanical energy harvester. This study describes the morphologies of as-synthesized zinc oxide (ZnO) nano rod-like structures grown onto a bare sputtered substrate and patterned microcontact electrode (IDE), using a simple chemical bath deposition method (CBD). Local piezoresponse measurements were conducted to detect the piezoelectric response and polarization switching in Zinc oxide nanorods. The morphological characteristics and electromechanical response of the grown nanostructures on the printed electrode have been investigated, as a step towards enhancing the performance of piezoelectric nanogenerators. The growth characteristics and energy harvesting ability of nanostructured ZnO on interdigitated microelectrode (IDE) were reported. AFM analysis indicated that the average seed layer thickness of the ZnO film deposited before the lithographic pattern of the IDE was about ~267.5 nm. The FESEM images and XRD analysis confirmed that the ZnO nanorods possessed a hexagonal wurtzite structure having the c-axis crystal orientation preferentially in the (002) plane. FTIR spectrum confirmed the secondary vibrations of the Zn–O bonding at 669.75 cm−1 even with the adjustment in the microstructural features of ZnO. Finally, the Piezoresponse Force Microscopy (PFM) analysis confirmed the converse piezoelectric response of the grown nanorods.

Keywords

ZnO nanorods

Nanostructures

Chemical bath deposition

Piezoelectric response

Interdigitated microelectrodes

Nanogenerators

© 2020 The Author(s). Published by Elsevier B.V.

Source: https://www.sciencedirect.com/science/article/pii/S2238785420320044?dgcid=rss_sd_all

Material

Synthesis and optical properties of alizarin yellow GG-Cu(II)-PVA nanocomposite film as a selective filter for optical applications

Publication date: Available online 4 January 2021

Source: Journal of Materials Research and Technology

Author(s): Mona M. Khalil, Adly H. El-Sayed, M.S. Masoud, E.M. Mahmoud, Mahmoud A. Hamad

Republished by Plato

Published

on


Elsevier

Available online 4 January 2021

Journal of Materials Research and Technology

open access

Abstract

In this paper, alizarin yellow GG (AYGG) – CuCl2 doped with polyvinyl alcohol (PVA) has been successfully synthesized. This composite has spherical shape particles with amorphous structure. Thermal analysis indicates that there is an endothermic change, which is related to the glass transition. In addition, the coordination between the transition metal Cu(II) ion and AYGG (ligand) occurs via oxygen atoms of phenolic hydroxyl groups and a nitrogen atom of azo moiety from the two ligand molecules. AYGG – Cu(II) doped PVA has high dispersion for high frequency lights and vice versa for low frequency lights. Therefore, it is concluded that AYGG – Cu(II) doped PVA film is suggested as a selective filter for ultraviolet and high frequency visible lights for many optical applications like protective shields for solar cells and packaging.

Keywords

Alizarin yellow GG

UV-Vis spectra

FTIR spectra

refractive index

© 2021 The Author(s). Published by Elsevier B.V.

Source: https://www.sciencedirect.com/science/article/pii/S2238785420321815?dgcid=rss_sd_all

Continue Reading

Material

Factors affecting the formation of plasma on Fe, Cu and W electrodes using an electrochemical reaction in an aqueous environment with high-voltage DC

Publication date: Available online 5 January 2021

Source: Journal of Materials Research and Technology

Author(s): Tran Van Cong, Nguyen Duc Hung, Lai Xuan Bach, Tran van Hung, Nam Nguyen Dang

Republished by Plato

Published

on


Elsevier

Available online 5 January 2021

Journal of Materials Research and Technology

open access

Highlights

Formation of plasma on Fe, Cu and W electrodes using electrochemical reaction in aqueous environment.

Plasma appears at a high voltage of about 15 kV with the earliest appearance on W electrode.

Water-soluble plasma on W electrode produces more gases than those in Fe and Cu electrodes.

The size of Cu and Fe nanoparticles is approximate 200 nm, whereas 100 and 500 nm were for W.

Abstract

Plasma creation technology in an aqueous environment is being evaluated for research and practical applications, particularly in the field of materials and nano processing, as well as environmental pollution treatment. Important factors that influence the appearance of plasma when performing electrolysis by high-voltage DC (direct current) in aqueous environments are voltage, distance between electrodes, pH, conductivity and ambient temperature, as well as the nature of the electrode, which has been suggested by concurrent works to be the controlling factor of the other ones. Specifically, it is indicated that the plasma typically appears at a high voltage of about 15 kV and a distance between electrodes of 200 mm, with the earliest appearance occurring with the tungsten (W) electrode. Additionally, pH, conductivity and temperature variations for effective plasma creation have been found in all investigated electrodes. Finally, it has been found that the water-soluble plasma on the W electrode produces more gas than those in iron (Fe) and copper (Cu) electrodes. After the reactions, the lowest dissolution belonging to W electrode could be attributed to the inertness of W in comparison with Fe and Cu, resulting in a minimal value of the zeta potential. In addition, the size of Cu and Fe nanoparticles achieved in the investigated solution was approximately 200 nm, whereas W nanoparticles were two separate sizes of 100 and 500 nm. Therefore, this work could offer the needed agency for technological applications in industrial wastewater treatment and high-purity nanoparticle fabrication.

Keywords

Plasma electrode

Copper

Iron

Tungsten

High voltage electrochemistry

© 2021 The Author(s). Published by Elsevier B.V.

Source: https://www.sciencedirect.com/science/article/pii/S2238785420321748?dgcid=rss_sd_all

Continue Reading

Material

Selenium nanoparticles synthesized using an eco-friendly method: Dye decolorization from aqueous solutions, cell viability, antioxidant, and antibacterial effectiveness

Publication date: Available online 5 January 2021

Source: Journal of Materials Research and Technology

Author(s): Badreah A. Al Jahdaly, Najlaa S. Al-Radadi, Ghada M.G. Eldin, Albandary Almahri, M.K. Ahmed, Kamel Shoueir, Izabela Janowska

Republished by Plato

Published

on


Elsevier

Available online 5 January 2021

Journal of Materials Research and Technology

open access

Abstract

Selenium nanoparticles (SeNPs) were fabricated using a green microwave technique in the presence of ascorbic acid. The morphological features indicated that the semi-spherical SeNPs with a diameter 8.5-22nm were configured in agglomerated spherical shapes with diameters around 0.47-0.71 μm. Furthermore, the removal of Fuchsin Basic dye from aqueous solutions was investigated upon variation of concentration of SeNPs. The degradation efficiency achieved 100 % for 10 mg of SeNPs after 34 min of visible light irradiation time. The antioxidant activity was tested via DPPH radical scavenging assay and displayed that the highest scavenging capacity (311.1±15.72 mg/g) was achieved by SeNPs at a concentration of 106.25 mg/mL. Otherwise, the cell viability of SeNPs through human fibroblasts cell lines in-vitro was reduced to be 75.1±3.8 % with nanoparticle concentration around 500 μg/mL. The antibacterial activity was investigated against gram-negative and gram-positive bacteria such as Escherichia coli (E.coli), Pseudomonas aeruginosa (P. aeruginosa), Klebsiella pneumoniae (K. pneumonia), Staphylococcus aureus (S. aureus), and Bacillus subtilis (B. subtilis) bacteria after one day of exposure. It was illustrated that SeNPs did not display an activity towards Staphylococcus aureus, while it possessed the highest one against Escherichia coli with MBC of 50 ± 1.76 μg/mL compared with 26 ± 0.6 μg/mL for the standard antibiotic. These tremendous properties of SeNPs indicate that manipulating multifunctional nanoparticles for versatile wound and skin treatment applications is highly encouraging.

Keywords

SeNPs

ascorbic acid

dye removal

antibacterial

antioxidant

© 2020 Published by Elsevier B.V.

Source: https://www.sciencedirect.com/science/article/pii/S2238785420321761?dgcid=rss_sd_all

Continue Reading
Uncategorized5 days ago

MediPharm Labs Appoints Warren Everitt, CEO Australia Pacific, to Board of Directors

News2 days ago

What are Some Major Factors to Keep in Mind When Buying CBD Vape Oil?

Uncategorized4 days ago

New York Small Business Cooperative License

Uncategorized5 days ago

Cannabis Sector Reverse Splits – The Good, The Bad, and The Ugly

Heartland4 days ago

Mama Cultiva & the Fight for Cannabis Legalization

Uncategorized4 days ago

New York Cannabis Distributor License

Heartland2 days ago

Investors in This Cannabis Stock Are Leaving $800 Million on the Table

Heartland2 days ago

What’s New With Cannabis Stocks for the Week Ending 01/15/21

Uncategorized4 days ago

New York Cannabis Delivery License

Heartland2 days ago

What is Delta-8 THC? Everything You Need to Know

Hemp4 days ago

The USDA Has Released Its Final Rule on Hemp Regulation

Uncategorized4 days ago

Cannabis Nursery in New York

Heartland3 days ago

Optical Coherence Tomography Findings in Cannabis Users

Heartland4 days ago

Virginia Subcommittee on Marijuana Forms to Debate Legalization Bill

News4 days ago

CBD News: Clint Eastwood files third suit against CBD companies, saying they’re falsely claiming endorsement

Uncategorized4 days ago

New York’s Marijuana Cultivation License

Heartland4 days ago

MMJRecs What Does The 2020 Election Mean For Medical Marijuana?

Research5 days ago

The DEA Has Now Received Nearly Fifty Applications for Federal Cannabis Cultivation Licenses

Heartland5 days ago

Evaluation of the Effect of Cannabidiol on Naturally Occurring Osteoarthritis-Associated Pain: A Pilot Study in Dogs

Hemp4 days ago

USDA Issues Final Rule On Hemp

Heartland5 days ago

Michigan veterinarians can now talk CBD with pet owners

Heartland4 days ago

France’s “recreational” cannabis survey • New Mexico governor prioritizes legalization • California eases banking access • & more…

Heartland4 days ago

CBD News Roundup: FDA Provides Framework for Future CBD Research

Heartland4 days ago

High Times Greats: Robert Anton Wilson

Uncategorized4 days ago

New York’s Adult-Use Processor License

Heartland4 days ago

The Blinc Group Raises $1.5 Million

Heartland4 days ago

Flashback Friday: Recollections of a Lady Dealer

Heartland4 days ago

Hydrobuilder Holdings Raises $70 Million and Combines West Coast Hydroponics Chain with Online Retailer

Heartland4 days ago

Some Oddly Specific Predictions About Films You Should Keep an Eye Out For This Year

Heartland4 days ago

EGF Theramed Raises $352,502 in First Tranche of Private Placement

Trending

A Cloud Nine Capital Entity Copyright © 2020 – All Rights Reserved Proudly Made in America