scholarly journals Biocompatibility and Antibacterial Properties of ZnO-Incorporated Anodic Oxide Coatings on TiZrNb Alloy

Nanomaterials ◽  
2020 ◽  
Vol 10 (12) ◽  
pp. 2401
Author(s):  
Oleksandr Oleshko ◽  
Yevheniia Husak ◽  
Viktoriia Korniienko ◽  
Roman Pshenychnyi ◽  
Yuliia Varava ◽  
...  
Keyword(s):  
Contact Angle ◽  
Zno Nanoparticles ◽  
Cell Attachment ◽  
Antibacterial Properties ◽  
Oxide Coating ◽  
Anodic Oxide ◽  
Ceramic Coatings ◽  
Zno Nps ◽  
Low Modulus ◽  
Ca Ions

In a present paper, we demonstrate novel approach to form ceramic coatings with incorporated ZnO nanoparticles (NPs) on low modulus TiZrNb alloy with enhanced biocompatibility and antibacterial parameters. Plasma Electrolytic Oxidation (PEO) was used to integrate ZnO nanoparticles (average size 12–27 nm), mixed with Ca(H2PO2)2 aqueous solution into low modulus TiZrNb alloy surface. The TiZrNb alloys with integrated ZnO NPs successfully showed higher surface porosity and contact angle. XPS investigations showed presence of Ca ions and absence of phosphate ions in the PEO modified layer, what explains higher values of contact angle. Cell culture experiment (U2OS type) confirmed that the surface of as formed oxide-ZnO NPs demonstrated hydrophobic properties, what can affect primary cell attachment. Further investigations showed that Ca ions in the PEO coating stimulated proliferative activity of attached cells, resulting in competitive adhesion between cells and bacteria in clinical situation. Thus, high contact angle and integrated ZnO NPs prevent bacterial adhesion and considerably enhance the antibacterial property of TiZrNb alloys. A new anodic oxide coating with ZnO NPs could be successfully used for modification of low modulus alloys to decrease post-implantation complications.

scholarly journals Mechanistic Study of Antibacterial Properties of Chemically Synthesize Zinc Oxide Nanoparticles

2019 ◽  
Vol 2 (1) ◽  
pp. 42-52
Author(s):  
Abdur Rehman ◽  
Saira Ahmad ◽  
Abdul Mateen ◽  
Huma Qamar ◽  
Mudaber Ahmad Mubashar ◽  
...  
Keyword(s):  
Zinc Oxide ◽  
Zno Nanoparticles ◽  
Bacterial Strain ◽  
Zinc Oxide Nanoparticles ◽  
Sol Gel ◽  
Antibacterial Properties ◽  
Mechanistic Study ◽  
Oxide Nanoparticles ◽  
Zno Nps ◽  
Wide Range

Nanotechnology is the science, engineering and technology conducted at the scale that ranges between 1-100 nanometers. For the bio-application, evolution of nanotechnology is creating the concern of scientists towards the synthesis of nanoparticles. The nanoparticles have unique characteristics as compare to bulk materials. Zinc oxide (ZnO) is a matchless semiconductor and it has been under investigation due to its wide range of applications in various areas like biomedical, electronics, material science and optics. In the present work synthesis of ZnO nanoparticles was carried out by using simple chemical approach, Sol-gel method for being effective and inexpensive, by employing zinc acetate dehydrate Zn (CH3CO2)2.2H2O as a precursor and sodium hydroxide (NaOH) starch as a constant agent. The structural properties of resultant zinc oxide nanoparticles were investigated by X-ray diffraction (XRD) technique. The XRD data confirmed the hexagonal wurtzite structure of ZnO powder confirmed by JCPDS 36-1451 data. Particles size was calculated by Scherrer formula and calculated size was 30.14 nm. These nanoparticles were investigated for inhibition zone of bacterial strain Escherichia coli, a gram-negative microbe, at various concentrations of ZnO nanoparticles. Zinc oxide nanoparticles were very proficient for inhibition of growth of bacterial strain E. coli. The mechanism of ZnO NPs for antibacterial activity is release of reactive oxygen species which not only hydrolyze cell wall but cell membrane and cellular components as well providing a potential bactericidal effect.

scholarly journals Facile Green Synthesis of LaCe Co-Doped ZnO Nanoparticles and Their Structural, Optical and Antibacterial Properties

2018 ◽  
Vol 4 (5) ◽  
pp. 552-554
Author(s):  
M. Karthikeyan ◽  
A. Jafar Ahamed ◽  
P. Vijaya Kumar
Keyword(s):  
Green Synthesis ◽  
Zno Nanoparticles ◽  
Synthesis Method ◽  
Antibacterial Properties ◽  
Inert Gases ◽  
Diffusion Method ◽  
Zno Nps ◽  
Vis Spectroscopy ◽  
Doped Zno ◽  
Co Doped

This present work describes the synthesis of LaCe co-doped zinc oxide (ZnO) nanoparticles (NPs) prepared by green method using Gymnema sylvestre (G. sylvestre) leaves as reducing as well as capping agent. Green synthesis method avoids inert gases, high pressure, laser radiation, high temperature, toxic chemicals etc. as compared to conventional method like sol-gel technique method, laser ablation method, solvothermal method, inert gas condensation method and chemical reduction method. The synthesized LaCe co-doped ZnO NPs was characterized by X-Ray diffraction (XRD), field emission scanning electron microscopy (FESEM), elemental analysis (EADX), Fourier transform infrared spectroscopy (FTIR), UV-vis spectroscopy and photoluminescence (PL). The LaCe co-doped ZnO NPs was tested against clinical pathogens such as gram positive G+ (Staphylococcus aureus and Streptococcus pneumoniae) and gram negative G- (Klebsiella pneumoniae, Shigella sydenteriae, Escherichia coli, Pseudomonas aeruginosa and Protus vulgaris) bacterial strains using agar well diffusion method.

scholarly journals Fabrication of Gelatin-ZnO Nanofibers for Antibacterial Applications

Materials ◽  
2020 ◽  
Vol 14 (1) ◽  
pp. 103
Author(s):  
Nataliya Babayevska ◽  
Łucja Przysiecka ◽  
Grzegorz Nowaczyk ◽  
Marcin Jarek ◽  
Martin Järvekülg ◽  
...  
Keyword(s):  
Escherichia Coli ◽  
Zno Nanoparticles ◽  
High Surface ◽  
Sol Gel ◽  
High Surface Area ◽  
Antibacterial Properties ◽  
Physicochemical Characterization ◽  
Zno Nps ◽  
Electrospinning Technique ◽  
Electron Microscopies

In this study, GNF@ZnO composites (gelatin nanofibers (GNF) with zinc oxide (ZnO) nanoparticles (NPs)) as a novel antibacterial agent were obtained using a wet chemistry approach. The physicochemical characterization of ZnO nanoparticles (NPs) and GNF@ZnO composites, as well as the evaluation of their antibacterial activity toward Gram-positive (Staphyloccocus aureus and Bacillus pumilus) and Gram-negative (Escherichia coli and Pseudomonas fluorescens) bacteria were performed. ZnO NPs were synthesized using a facile sol-gel approach. Gelatin nanofibers (GNF) were obtained by an electrospinning technique. GNF@ZnO composites were obtained by adding previously produced GNF into a Zn2+ methanol solution during ZnO NPs synthesis. Crystal structure, phase, and elemental compositions, morphology, as well as photoluminescent properties of pristine ZnO NPs, pristine GNF, and GNF@ZnO composites were characterized using powder X-ray diffraction (XRD), FTIR analysis, transmission and scanning electron microscopies (TEM/SEM), and photoluminescence spectroscopy. SEM, EDX, as well as FTIR analyses, confirmed the adsorption of ZnO NPs on the GNF surface. The pristine ZnO NPs were highly crystalline and monodispersed with a size of approximately 7 nm and had a high surface area (83 m2/g). The thickness of the pristine gelatin nanofiber was around 1 µm. The antibacterial properties of GNF@ZnO composites were investigated by a disk diffusion assay on agar plates. Results show that both pristine ZnO NPs and their GNF-based composites have the strongest antibacterial properties against Pseudomonas fluorescence and Staphylococcus aureus, with the zone of inhibition above 10 mm. Right behind them is Escherichia coli with slightly less inhibition of bacterial growth. These properties of GNF@ZnO composites suggest their suitability for a range of antimicrobial uses, such as in the food industry or in biomedical applications.

Synergistic Antibacterial Activity of Nanohybrid Materials ZnO–Ag and ZnO–Au: Synthesis, Characterization, and Comparative Analysis of Undoped and Doped ZnO Nanoparticles

2015 ◽  
Vol 68 (2) ◽  
pp. 288 ◽  
Author(s):  
Adriana Berenice Pérez Jiménez ◽  
Carlos Alberto Huerta Aguilar ◽  
Jorge Manuel Vázquez Ramos ◽  
Pandiyan Thangarasu
Keyword(s):  
Electron Microscopy ◽  
Zno Nanoparticles ◽  
Antibacterial Properties ◽  
Growth Control ◽  
Bacterial Cells ◽  
Bacterial Strains ◽  
Ag Nps ◽  
Zno Nps ◽  
Au Nps ◽  
X Ray

ZnO nanoparticles (NPs) were prepared using the hydrothermal method, and then doped with Ag or Au NPs, yielding ZnO NPs, ZnO–Ag NPs, and ZnO–Au NPs, which were characterized by transmission electron microscopy, X-ray diffraction, and energy-dispersive X-ray spectroscopy. The synthesized nanomaterials were analyzed for their antibacterial properties against bacterial strains (Staphylococcus aureus, Bacillus cereus, Escherichia coli, and Salmonella typhi) by qualitative and quantitative assays. Minimal inhibitory concentration (MIC) results show that growth control is more effective for Gram-positive bacteria than for Gram-negative bacteria. Although ZnO NPs and Ag NPs are antibacterial agents, the lowest bacterial growth was observed for ZnO–Ag NPs, showing that the doped Ag NPs greatly facilitate the interaction between the microbial cells and the NP surface. Though the same antibacterial effect was expected for ZnO–Au NPs, the inhibition activity was very close to that of ZnO NPs. The order of bacterial cell growth inhibition was ZnO–Ag NPs >> ZnO–Au NPs ~ ZnO NPs >> ZnO powder. We also analyzed the morphology of bacterial cells treated with NPs by scanning electron microscopy.

Electrochemical Sensing of Dopamine and Antibacterial Properties of ZnO Nanoparticles Synthesized from Solution Combustion Method

2015 ◽  
Vol 14 (03) ◽  
pp. 1550005 ◽  
Author(s):  
K. Manjunath ◽  
K. Lingaraju ◽  
D. Kumar ◽  
H. Nagabhushan ◽  
D. Samrat ◽  
...  
Keyword(s):  
Zno Nanoparticles ◽  
Quantum Confinement Effect ◽  
Antibacterial Properties ◽  
Combustion Method ◽  
Electrochemical Sensing ◽  
Diffusion Method ◽  
Solution Combustion ◽  
Zno Nps ◽  
Solution Combustion Method ◽  
Strong Absorption Band

We have successfully synthesized ZnO nanoparticles (NPs) from solution combustion method using combustible fuel (Green gram). XRD pattern confirms that the prepared compound is composed of wurtzite hexagonal zinc-oxide. FTIR spectrum of ZnO NPs shows the band at ~ 417 cm-1 associated with the characteristic vibration of Zn - O . The UV-Vis spectrum shows a strong absorption band at ~ 365 nm which is blue shifted due to quantum confinement effect. TEM images show the average sizes of the nanoparticles are found to be almost ~ 15–30 nm. The as-synthesized product shows good electrochemical sensing of dopamine. Furthermore the antibacterial properties of ZnO NPs were investigated by their bactericidal activity against four bacterial strains using the agar well diffusion method.

scholarly journals Influence of Physical Dimension and Morphological-Dependent Antibacterial Characteristics of ZnO Nanoparticles Coated on Orthodontic NiTi Wires

2021 ◽  
Vol 2021 ◽  
pp. 1-9
Author(s):  
Mona Gholami ◽  
Mahdiyeh Esmaeilzadeh ◽  
Zahra Kachoei ◽  
Mojgan Kachoei ◽  
Baharak Divband
Keyword(s):  
Zno Nanoparticles ◽  
Antimicrobial Agents ◽  
Sol Gel ◽  
Antibacterial Properties ◽  
Electrospinning Process ◽  
Precipitation Method ◽  
Zno Nanostructures ◽  
Zno Nps ◽  
Niti Wire ◽  
Niti Wires

White spot lesions (WSLs) are one of the adverse effects of fixed orthodontic treatments. They are the primary sign of caries, which means inhibiting this process by antibacterial agents will reverse the procedure. The current study tested the surface modification of nickel-titanium (NiTi) wires with ZnO nanoparticles (NPs), as antimicrobial agents. As the morphology of NPs is one of the most critical factors for their properties, the antibacterial properties of different morphologies of ZnO nanostructures coated on the NiTi wire were investigated. For the preparation of ZnO nanostructures, five coating methods, including chemical vapor deposition (CVD), chemical precipitation method, polymer composite coating, sol-gel synthesis, and electrospinning process, were used. The antibacterial activity of NPs was assessed against Streptococcus mutans by the colony counting method. The obtained results showed that all the samples had antibacterial effects. The antibacterial properties of ZnO NPs were significantly improved when the specific surface area of particles increased, by the ZnO nanocrystals prepared via the CVD coating method.

In Situ Growth of Zinc Oxide Nanoparticles on Cotton Fabric Using Sonochemical Method

2013 ◽  
Vol 856 ◽  
pp. 53-59 ◽  
Author(s):  
Leila Zarei ◽  
Sheila Shahidi ◽  
Seyed Mohammad Elahi ◽  
Arash Boochani
Keyword(s):  
Zinc Oxide ◽  
Zno Nanoparticles ◽  
Antibacterial Properties ◽  
Antibacterial Activities ◽  
Woven Fabric ◽  
Semiconductor Materials ◽  
Sonochemical Method ◽  
Morphological Transformation ◽  
Zno Nps ◽  
Size And Morphology

Researches show that properties of semiconductor materials such as electrical, optical and antibacterial properties can be improved in the nanoscale. Among the semiconductor materials , zinc oxide with excellent electronic properties has been considered extremely. Application and properties of Zno nanoparticles depends on the size and morphology. In the present work, Zno Nanoparticles (NPs) were prepared by sonochemical method at a constant temperature and were applied on to the 100% cotton woven fabric using Insitu method. The results show that nanoparticles with average sizes of 20-100 nm with different morphologies were created on the surface of samples. Synthesis of ZnO-NPs were varied in the morphological transformation by changes in zinc acetate concentration. Characterizations were carried out, Scanning electron microscopy (SEM) and Spectrophotometery. The antibacterial activities of the fabrics were assessed semi-quantitatively by the coloneis count method. The results show that the finished fabric demonstrated significant antibacterial activity against S.aureus in antibacterial test.

scholarly journals Identification and assessment of the antibacterial activity of ZnO nanoparticles produced by Vigna mungo and Rhizobacteria.

2021 ◽  
Author(s):  
Bharat BK kwatra
Keyword(s):  
Antibacterial Activity ◽  
Zno Nanoparticles ◽  
Leaf Extract ◽  
Antibacterial Properties ◽  
Antimicrobial Properties ◽  
Vigna Mungo ◽  
Alpha Tocopherol ◽  
Diffusion Experiment ◽  
Zno Nps ◽  
Rhizobium Sp

ZnO nanoparticles have received a lot of interest in recent years due to their unusual features. Antimicrobial properties of ZnO NPs However, the qualities of nanoparticles are determined by their size and form, making them suitable for a variety of applications. The current work looks at the synthesis, characterization, and antibacterial activity of ZnO NPs produced by Vigna Mungo and Rhizobacteria. Rhizobacteria isolated from V. mungo root nodule were morphologically, biochemically, and molecularly examined and identified as Rhizobium sp. strain P4 and Bacillus flexus strain IFO15715. The GC-MS analysis of methanol leaf extract of V. mungo was performed to detect and identify bioactive chemicals, and this indicated phytol as an antibacterial agent, while Squalene and Alpha tocopherol had antioxidant and anti-tumour properties. Agar well diffusion experiment was used to determine the antibacterial properties of ZnO nanoparticles and Vigna Mungo leaf extract. This approach is widely documented, and standard zones of inhibition for sensitive and resistant values have been defined. The results demonstrated that both methanol extract and zinc oxide nanoparticles have strong antibacterial efficacy against the majority of the pathogens examined. he synthesized nanoparticles from Rhizobium sp. were characterized by analytical techniques like SEM, XRD, FTIR, and UV Vis.

Preparation of polycrystalline ZnO nanoparticles loaded onto graphene oxide and their antibacterial properties

2021 ◽  
pp. 102531
Author(s):  
Xin Zhang ◽  
Huanxian Shi ◽  
Enzhou Liu ◽  
Xiaoyun Hu ◽  
Ke Zhang ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Zno Nanoparticles ◽  
Antibacterial Properties

scholarly journals Antibacterial and Photocatalytic Properties of ZnO Nanoparticles Obtained from Chemical versus Saponaria officinalis Extract-Mediated Synthesis

Molecules ◽  
2021 ◽  
Vol 26 (7) ◽  
pp. 2072
Author(s):  
Maria Antonia Tănase ◽  
Maria Marinescu ◽  
Petruta Oancea ◽  
Adina Răducan ◽  
Catalin Ionut Mihaescu ◽  
...  
Keyword(s):  
Microwave Irradiation ◽  
Zno Nanoparticles ◽  
Model Compound ◽  
Size Composition ◽  
Inorganic Nanoparticles ◽  
Bacterial Strains ◽  
X Ray Diffraction ◽  
Zno Nps ◽  
Reaction Conditions ◽  
Saponaria Officinalis

In the present work, the properties of ZnO nanoparticles obtained using an eco-friendly synthesis (biomediated methods in microwave irradiation) were studied. Saponaria officinalis extracts were used as both reducing and capping agents in the green nanochemistry synthesis of ZnO. Inorganic zinc oxide nanopowders were successfully prepared by a modified hydrothermal method and plant extract-mediated method. The influence of microwave irradiation was studied in both cases. The size, composition, crystallinity and morphology of inorganic nanoparticles (NPs) were investigated using dynamic light scattering (DLS), powder X-ray diffraction (XRD), SEM-EDX microscopy. Tunings of the nanochemistry reaction conditions (Zn precursor, structuring agent), ZnO NPs with various shapes were obtained, from quasi-spherical to flower-like. The optical properties and photocatalytic activity (degradation of methylene blue as model compound) were also investigated. ZnO nanopowders’ antibacterial activity was tested against Gram-positive and Gram-negative bacterial strains to evidence the influence of the vegetal extract-mediated synthesis on the biological activity.

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