Impact of Aluminium on ZnO Thin Films for Antimicrobial Activity

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 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. The UV-vis absorption spectrum for the thin films was also studied. There is decrease in bandgap as the Al doping ratio increases from 1% to 5%. Photoluminescence studies confirmed that oxygen ion vacancy and interstitial Zn+ ion were present. The maximum zone of inhibition was studied against the Gram-negative (E. coli) and Gram-positive (S. aureus) bacteria by agar diffusion method. Significant antimicrobial results were seen in pure and Al doped ZnO. Aluminium doped ZnO shows more antimicrobial activity over pure ZnO.

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Impact of Aluminium on ZnO Thin Films for Antimicrobial Activity

10.21203/rs.3.rs-518844/v1 ◽

2021 ◽

Author(s):

BA ANANDH ◽

R SAKTHIVEL ◽

A SHANKAR GANESH ◽

S SUBRAMANI ◽

A T RAJAMANICKAM

Keyword(s):

Thin Films ◽

Diffusion Method ◽

Zone Of Inhibition ◽

Structural Morphology ◽

Pure Zinc ◽

Oxygen Ion ◽

Diffraction Peaks ◽

Doped Zno ◽

Silar Technique ◽

Doping Ratio

Abstract 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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Antimicrobial Activity of Photoactive Cerium Doped Zinc Oxide

Solid State Phenomena ◽

10.4028/www.scientific.net/ssp.307.217 ◽

2020 ◽

Vol 307 ◽

pp. 217-222 ◽

Cited By ~ 1

Author(s):

Maishara Syazrinni Rooshde ◽

Wan Rafizah Wan Abdullah ◽

Amie Zaidah Amran ◽

Noradhiha Farahin Ibrahim ◽

Fazilah Ariffin ◽

...

Keyword(s):

Antimicrobial Activity ◽

Uv Light ◽

Light Exposure ◽

Antimicrobial Properties ◽

Diffusion Method ◽

Gram Positive ◽

E Coli ◽

Antifouling Agent ◽

Doped Zno ◽

Zno Powder

Biofouling and biofilms exist as ubiquitous, undesirable accumulation of flora and fauna upon a given substrate when being immersed into an aquatic medium. Therefore, a novel antifouling based materials with the incorporation of nanotechnology has been developed for the prevention of biofouling in its initial stage through photocatalytic treatment. This study investigated the antimicrobial properties of photoactive Cerium (Ce) doped ZnO powder and explores its potential properties for future antifouling application. ZnO nanoparticles was doped with 0.4 mol% Ce was synthesized through the combination of modified citrate gelation technique and solid state sintering. The successful preparation of Ce doped ZnO was confirmed by XRD and SEM. The antimicrobial activity of Ce doped ZnO against E. coli and S. aureus was determined through antibacterial susceptibility test by agar well diffusion method whilst its photocatalytic inactivation efficiency against selected bacteria was analysed through photodegradation testing under UV light irradiation. The findings demonstrated that the synthesized Ce doped ZnO powder exhibited antibacterial effect against Gram-positive bacteria (S. aureus) and excellent photocatalytic efficiency to inactivate both Gram-negative (E. coli) and Gram-positive (S. aureus). 2 g/L of Ce doped ZnO catalyzed the 100% disinfection of both bacteria in 180 min of UV light exposure. Thus, this proved that Ce doped ZnO powder has the potential as efficient antifouling agent.

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Photoluminescence studies on MBE grown Co-doped ZnO thin films fabricated through ion implantation and swift heavy ion irradiation

Nuclear Instruments and Methods in Physics Research Section B Beam Interactions with Materials and Atoms ◽

10.1016/j.nimb.2011.01.088 ◽

2012 ◽

Vol 272 ◽

pp. 305-308 ◽

Cited By ~ 6

Author(s):

Basavaraj Angadi ◽

Ravi Kumar ◽

Dong-Hee Park ◽

Ji-Won Choi ◽

Won-Kook Choi

Keyword(s):

Thin Films ◽

Ion Irradiation ◽

Heavy Ion ◽

Zno Thin Films ◽

Swift Heavy Ion Irradiation ◽

Heavy Ion Irradiation ◽

Swift Heavy Ion ◽

Doped Zno ◽

Photoluminescence Studies ◽

Co Doped

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SYNTHESIS AND CHARACTERIZATION OF Fe–ZnO THIN FILMS FOR ANTIMICROBIAL ACTIVITY

Surface Review and Letters ◽

10.1142/s0218625x18501974 ◽

2019 ◽

Vol 26 (05) ◽

pp. 1850197 ◽

Cited By ~ 3

Author(s):

SELMA M. H. AL-JAWAD ◽

SABAH H. SABEEH ◽

ALI A. TAHA ◽

HUSSEIN A. JASSIM

Keyword(s):

Thin Films ◽

Doping Concentration ◽

Optical Bandgap ◽

Zno Thin Films ◽

Zno Films ◽

Fe Doping ◽

E Coli ◽

Average Grain Size ◽

Vis Spectroscopy ◽

Doped Zno

Pure and Fe-doped zinc oxide (ZnO) sol–gel thin films were deposited by spin-coating process. Pure ZnO and Fe–ZnO films, containing Fe of 2–8[Formula: see text]wt.%, were annealed at 500∘C for 2[Formula: see text]h. All prepared thin films were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), atomic force microscopy (AFM) and UV–visible (UV–vis) spectroscopy. XRD studies show the polycrystalline nature with hexagonal wurtzite structure of pure ZnO and Fe–ZnO thin films. The crystallite size of the prepared samples reduced with increasing Fe doping concentrations. AFM and SEM results indicated that the average grain size decreased as Fe doping concentration increased. The transmittance spectra were then recorded at wavelengths ranging from 300[Formula: see text]nm to 1000[Formula: see text]nm. The films produced yielded high transmission at visible regions. The optical bandgap energy of spin-coated films also decreased as Fe doping concentration increased. In particular, their optical bandgap energies were 3.75, 3.6, 3.5, 3.45 and 3.3 eV at 0-, 2-, 4-, 6- and 8-wt.% Fe concentrations, respectively. Antibacterial activities of pure ZnO and Fe–ZnO against E. coli and S. aureus were evaluated by international recognized test (JIS Z 2801). The results showed that pure and Fe-doped ZnO thin films have antibacterial inhibition zone against E. coli and S. aureus. Gram-positive bacteria seemed be more resistant to pure and Fe-doped ZnO thin films than gram-negative bacteria. The test shows an incremental increase in antibacterial activity of the thin films when dopant ratio increased under UV light.

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