Characterization and study of antibacterial activity of spray pyrolysed ZnO:Al thin films

Manoharan, C.; Pavithra, G. P.; Bououdina, M.; Dhanapandian, S.; Prabhu, Dhamodharan

doi:10.1007/s13204-015-0493-8

Cited by 61 publications

(14 citation statements)

References 34 publications

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“…Finally, the structure was modified to spherical particles with a high aggregation and a diameter of about 22-32 nm. These results are in agreement with those of earlier works [29][30][31]. Figure-5 explains the transmittance spectra for the prepared samples.…”

Section: Resultssupporting

confidence: 92%

Synthesis and Characterization of Aluminum Doped Zinc Oxide Nanostructures by Nd:YAG Laser in Liquid

Khashan

Sulaiman

Hussain

2020

eijs

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Aluminum doped zinc oxide nanoparticles (AZO) with different doping concentrations were prepared by Nd-YAG laser ablation of target in deionized water. The characterization of these nanoparticles was performed using Fourier transform infrared (FTIR) spectroscopy, scanning electron microscopy (SEM) and photoluminance spectroscopy (PL). FTIR spectra confirmed the formation of vibrational bonds for ZnO NPs and AZO NPs. SEM images illustrated that the size and shape of the NPs changed with changing the number of laser pulses. Photoluminescence peaks exhibited two emission peaks, one at the UV region and the second in the visible region, which were modified as the number of laser pulses and doping concentration were changed.

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Section: Resultssupporting

confidence: 92%

Synthesis and Characterization of Aluminum Doped Zinc Oxide Nanostructures by Nd:YAG Laser in Liquid

Khashan

Sulaiman

Hussain

2020

eijs

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“…It was found that the intensity of the (002) peak of Al-doped ZnO NSs was comparatively lower than that of pure ZnO NWs, which could reduce the surface energy of ZnO as Al replaced the Zn ions of the hexagonal wurtzite structure. 31 It was evident from the XRD pattern of Al-doped ZnO NSs that the peaks at 31.83 and 36.38° corresponded to the (100) and (101) reflections, respectively, which indicated that the Al-doping could influence the orientation of ZnO nanostructure from the x -axis changing to isotropic. 32 On the other hand, the (002) peak of ZnO NSs was significantly shifted to the larger diffraction angle when compared to pure ZnO NWs because of the replacement of Zn 2+ ions (ion radius 0.74 Å) by smaller Al 3+ ions (ion radius 0.53 Å).…”

Section: Resultsmentioning

confidence: 96%

Fast Detection and Flexible Microfluidic pH Sensors Based on Al-Doped ZnO Nanosheets with a Novel Morphology

Tsai

Chang

et al. 2019

ACS Omega

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In this study, a flexible and stable pH sensor based on aluminum-doped zinc oxide nanosheets (Al-doped ZnO NSs) was developed by a low-cost hydrothermal method. The results obtained from this study indicated that Al ions could be doped successfully into the ZnO nanostructure, which could change the morphology and improve the pH-sensing properties. The pH sensitivity of Al-doped ZnO nanosheets reached 50.2 mV/pH with a correlation coefficient of around 0.99468 when compared with that of ZnO film (34.13 mV/pH) and pure ZnO nanowires (45.89 mV/pH). The test range of pH values was widened by Al-doping, and the Al-doped ZnO NS sensor could detect the pH value ranging from 2 to 12. It was observed that in a more acidic environment, especially at pH 2, the sensor, Al-doped ZnO nanosheet, was strongly stable over 12 weeks of testing. It was noted that the response time was utterly fast and the response time of the sensors for each pH standard buffer solutions was around 0.3 s. Thus, the response time and performance were quite stable. The microchannel provided a novel testing method for the pH sensor, where the liquid to be tested was just 5 mL. Hence, it was suggested to be useful for many medical diagnoses and treatments. The benefits of Al-doped ZnO nanosheet pH sensor were high sensitivity, good long-term usage, good flexible property, and requirement of a small amount of test liquid, which could make the sensors viable candidates for practical applications.

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“…. The zone of inhibition clearly shows the method of the biocidal activity of the Aluminium doped ZnO that obliterates the external wall of the bacteria and promotes death [29]. The antibacterial effect of Al doped zinc oxide was superior on E.Coli than other strain.…”

Section: Optical Propertiesmentioning

confidence: 95%

“…Since then, ZnO particles start to discharge oxygen species into the bacteria that suppress the development of cell which results in the alteration and leakage of the cell and makes the cell to death[28]. The zone of inhibition clearly shows the method of the biocidal activity of the Aluminium doped ZnO that obliterates the external wall of the bacteria and promotes death[29]. The antibacterial effect of Al doped zinc oxide was superior on E.Coli than other strain.…”

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confidence: 99%

Impact of Aluminium on ZnO Thin Films for Antimicrobial Activity

Anandh¹,

Sakthivel²,

Ganesh³

et al. 2021

Preprint

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Thin films of pure Zinc Oxide (ZnO) and Aluminium (Al) doped ZnO were deposited by two step SILAR technique. Pure and Al (1%, 3%, 5%) doped ZnO thin film’s structural, morphology and optical properties were analyzed. Diffraction peaks of the all the samples were indexed to hexagonal wurtizite structure. The crystallite size, lattice parameters, dislocation density and microstrain were calculated for the prepared thin films. Morphology study using FESEM shows spherical shaped structure of pure ZnO and hexagonal faced rod like structure for Al doped ZnO thin films.T he UV-Vis absorption spectrum for the thin films was also studied. There is decrease in bandgap as the Al doping ratio increases from 1–5%. Photoluminescence (PL) studies confirm that oxygen ion vacancy and interstitial Zn+ ion were present. The maximum zone of inhibition was studied against the bacteria’s the Gram-negative (E.coli) and Gram-positive (S.aureus) by Agar diffusion method. Significant antibacterial result was seen in pure and Al doped ZnO. Al doped ZnO shows more antibacterial activity over pure ZnO. All the samples give considerable antifungal activity which was done against Aspergillusniger. .

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Characterization and study of antibacterial activity of spray pyrolysed ZnO:Al thin films

Cited by 61 publications

References 34 publications

Synthesis and Characterization of Aluminum Doped Zinc Oxide Nanostructures by Nd:YAG Laser in Liquid

Synthesis and Characterization of Aluminum Doped Zinc Oxide Nanostructures by Nd:YAG Laser in Liquid

Fast Detection and Flexible Microfluidic pH Sensors Based on Al-Doped ZnO Nanosheets with a Novel Morphology

Impact of Aluminium on ZnO Thin Films for Antimicrobial Activity

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