Antibacterial activity of ZnO nanorods prepared by a hydrothermal method

Tam, K. H.; Djurišić, Aleksandra B.; Chan, Chi Ming; Yan, Xi; Tse, Chui Wan; Leung, Yu Hang; Chan, Wai Kin; Leung, Fung Ping; Au, Doris W.T.

doi:10.1016/j.tsf.2007.11.081

Cited by 362 publications

(231 citation statements)

References 20 publications

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“…The antibacterial activity of ZnO increased with the concentration 29 in agreement with the present investigation of anti-E. coli. Tam et al 33 reported that ZnO is more effective for gram-positive than gram-negative bacteria because the formers have simpler cell membrane structure. The antifungal activity was evident in the carbon samples containing ZnO 32 .…”

Section: Resultsmentioning

confidence: 99%

“…Other proposed mechanism involves an accumulation of ZnO particles in the microbial membrane resulting in membrane disorganization and microbial cellular internalization 36 . However, it is still not clear yet whether the antibacterial activity of ZnO could be attributed to the damage of cell membranes, which lead to leakage of cell contents and cell death 33 . The difference in activity against these two types of bacteria can be attributed to different organization of the cell wall.…”

Section: Resultsmentioning

confidence: 99%

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Phaechamud¹,

Mahadlek²,

Aroonrerk³

et al. 2012

ScienceAsia

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Zinc oxide (ZnO) is a prototype of micro-and nanomaterials widely studied in different fields due to many promising new applications. Various zinc oxides (typical, micronized, powder, tetrapod I, and tetrapod II ZnO) have been characterized using SEM. The particle size of zinc oxides was analysed using laser light diffraction spectroscopy. Effects of types and amounts of ZnO on the antimicrobial activity were evaluated using Staphylococcus aureus, Escherichia coli, and Candida albicans as standard microbes. Lutrol F127 systems comprising ZnO and doxycycline hyclate were developed. Cytotoxicity of test samples and gel was investigated on human gingival fibroblast and macrophage cell line U937. Particle size analysis revealed that micronized ZnO was smaller than ZnO powder, ZnO BP, tetrapod I, or II zinc oxides. The particle size of tetrapod zinc oxides was larger than the others since they exhibited an arm structure configuration. The antibacterial activity depended on the particle size of ZnO, whereas the antifungal activity was less affected by the particle size. Increasing ZnO in the doxycycline hyclate-Lutrol F127 systems decreased the inhibition zone diameters against all test microbes investigated with agar diffusion method because it retarded drug diffusion. This effect could prolong the doxycycline hyclate release. N-methyl-2-pyrrolidone could enhance the antifungal activity of doxycycline hyclate thermosensitive gel. The developed system could inhibit bacteria in the oral cavity. All 10 mg/ml test samples were not toxic to human gingival fibroblast or macrophage cell line, however Lutrol F127 and doxycycline hyclate showed a slight effect but no significant difference from that of the control group. Therefore, ZnO combined with doxycycline hyclate could prolong the inhibition of microbes in the form of thermosensitive gel to use in localized periodontitis therapy.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Untitled

Phaechamud¹,

Mahadlek²,

Aroonrerk³

et al. 2012

ScienceAsia

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“…Furthermore the ZnO NPs, was caused when adherence to the surface of the cell membrane, in disturbance of respiration mechanical through interact with enzymes of the respiration chains of bacteria (Jones et al, 2008). Also from the results were appear that the inhibition zone was affected with the different in the bacterial types and shown the gram positive bacteria were more sensitive for ZnO NPs compared to the gram negative bacteria (Tam et al, 2008;Tayel et al, 2011) and these were related to differences in cell wall structure, cell physiology and metabolism pathway (Emami-Karvani and Chehrazi, 2011).…”

Section: Antibacterial Activities Of Zno Npsmentioning

confidence: 89%

Biosynthesis of Zinc Oxide Nanoparticles and Assay of Antibacterial Activity

Ibrahem¹,

Thalij

Saleh

et al. 2017

American Journal of Biochemistry and Biotechnology

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In this study Out of 280 urinary tract infections samples, 212(75.7%) bacterial isolates were recovered. Based on, morphological, cultural and biochemical testes, further, confirmed the results by VITEK 2 System there were 54 (30.2%) of gram positive whereas the 158 (69.8%) of gram negative. The bacterial isolates were distributed as Escherichia coli followed by Klebsiella pneumoniae, Staphylococcus aureus, Pseudomonas aeruginosa and Staphylococcus epidermidis which represented 96(45.2%), 48 (22.6%), 43(20.3%), 14 (6.6%) and 11 (5.2%) respectively. The synthesis of Zinc Oxide nanoparticles (ZnO NPs) using biological methods as eco-friendly from the use of Aspergillus niger filtrate in the extracellular synthesis, then identified and characterized by UV-Vis Spectrophotometer and Scanning Electron Microscopy (SEM). Furthermore, determine the antibacterial efficacy of biological synthesized ZnO NPs against isolated pathogens microbes Staphylococcus aureus and Escherichia coli. The results found the used of 100 mL of ZnCL2 in cultivation of Aspergillus niger was obtained and biosynthesis of ZnO NPs at 46 mg. SEM was illustrate the morphology and practices of ZnO NPs sizes and appear as spherical in shape besides, the size range at 41-75 nm. The assurance by the UV-Vis spectrum appears the absorption bands of ZnO NPs at 380 nm. The results of 1.0 and 1.5 mg mL −1 from ZnO NPs synthesized from A. niger were effect of inhibition against S. aureus and E. coli bacterial isolated from urine tracts infection sources. The Inhibition Zone Diameters (IZD) against S. aureus was appear at 24 and 26 mm respectively compared with the IZD from Ciprofloxacin alone at 20 mm. while the same concentration from ZnO NPs against E. coli causing in IZD at 25 and 28 mm respectively compared with Ciprofloxacin inhibition alone at 23 mm.

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“…Results presented in the literature indicate that the new hybrid filter may find potential application in ventilation and air conditioning systems or as a personal respiratory protection when microbiological hazard needs to be considered due to the antibacterial activity of ZnO (Ivanova et al, 2012;Li et al, 2008;Li et al, 2013;Pogodin et al, 2013;Tam et al, 2008).…”

Section: Discussionmentioning

confidence: 99%

Polypropylene – zinc oxide nanorod hybrid material for applications in separation processes

Jakubiak¹,

Tomaszewska²,

Jackiewicz³

et al. 2016

Chemical and Process Engineering

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Hybrid filter material was obtained via modification of polypropylene (PP) nonwoven with nanosize zinc oxide particles of a high aspect ratio. Modification was conducted as a three-step process, a variant of hydrothermal method used for synthesis of nano-ZnO, adopted for coating three dimensional polymeric nonwoven filters. The process consisted of plasma treatment of nonwoven to increase its wettability, deposition of ZnO nanoparticles and low temperature hydrothermal growth of ZnO rods. The modified nonwovens were investigated by a high resolution scanning electron microscopy (HR-SEM). It has been found that the obtained hybrid filters offer a higher filtration efficiency, in particular for so called most penetrating particle sizes.

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Antibacterial activity of ZnO nanorods prepared by a hydrothermal method

Cited by 362 publications

References 20 publications

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Biosynthesis of Zinc Oxide Nanoparticles and Assay of Antibacterial Activity

Polypropylene – zinc oxide nanorod hybrid material for applications in separation processes

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