Elucidation of photocatalysis, photoluminescence and antibacterial studies of ZnO thin films by spin coating method

Kaviyarasu, K.; Magdalane, C. Maria; Kanimozhi, K.; Kennedy, J.; Siddhardha, Busi; Reddy, E. Subba; Rotte, Naresh Kumar; Sharma, Chandra Shekhar; Thema, Force Tefo; Letsholathebe, Douglas; Mola, Genene Tessema; Mâaza, M.

doi:10.1016/j.jphotobiol.2017.06.026

Cited by 223 publications

(53 citation statements)

References 43 publications

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“…Zinc deficiency or excess may lead to a range of disorders because zinc ions are the components or activators of many enzymes involved in the metabolic processes . A lot of attention to ZnO nanoparticles in biological applications has been dedicated also due to their unique electronic, thermal, and optical properties as well as their biocompatibility …”

Section: Introductionmentioning

confidence: 99%

The studies of cytotoxicity and antibacterial activity of composites with ZnO‐doped bioglass

Ciołek

Biernat

Jaegermann

et al. 2018

Int J Applied Ceramic Tech

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The paper presents results of the studies on porous composites obtained using lyophilization method based on the solutions of the following polymers: chitosan, sodium alginate and polylactide, as well as ZnO-doped CaO-SiO 2 -P 2 O 5 bioglass.The researchers took the advantage of zinc ions demonstrating the bactericidal, immune-stimulating, and tissue-regenerating functions in the organism. The cytotoxicity of the composites was tested on L929 cells by means of the direct and the indirect contact method. The antibacterial properties were determined against the gram-negative bacteria Pseudomonas aeruginosa and the gram-positive bacteria Staphylococcus aureus at 24, 48 hours, and 7 days. The study demonstrated that changes due to cytotoxicity effect of the composites depend on the type of polymer and on the duration of contact with cells. The composite with polylactide was found to be the least toxic for L929 cells. ZnO added to the chemical composition of bioglass ensured bactericidal effects. The antibacterial properties of the composites depended on the ZnO content, bioglass grain size, polymer type, and composite microstructure. The composites presented in this paper are innovative as biomaterials for filling bone cavities because they can be a matrix for cells and have an antibacterial effect while supporting the regeneration of damaged tissue. K E Y W O R D Santibacterial activity, bioglass, composite, cytotoxicity

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Section: Introductionmentioning

confidence: 99%

The studies of cytotoxicity and antibacterial activity of composites with ZnO‐doped bioglass

Ciołek

Biernat

Jaegermann

et al. 2018

Int J Applied Ceramic Tech

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“…Oxygen vacancies influence the photocatalytic response of the material due to the direct alteration of the surface charge and the oxidation potential of the valence band [47] [43]. It is important to note that it has been found that synthesis by combustion in solution can [64][65][66][67][68][69][70][71][72][73][74] generate doping with carbon atoms and nitrogen as a product of the reaction reducing atmosphere produced during the synthesis [55]. In the three case it is possible to find the dopant as a secondary phase associated with the surface of TiO 2 i.e.…”

Section: Structural Characterizationmentioning

confidence: 99%

“…8) and the variation in tolerance and susceptibility due to oxidative stress that leishmania parasites could have. Other factors such as particle size and shape, and specific area at nano scale play an important role in potential [64][65][66][67][68][69][70][71][72][73][74] antileishmania behavior. These phenomena have already been widely observed in the antimicrobial response of several semiconductor structures which principle of action is the production of ROS [61].…”

Section: Evaluation Of In Vitro Activity Of Nps Against L Amazonensimentioning

confidence: 99%

Solution-combustion synthesis of doped TiO 2 compounds and its potential antileishmanial activity mediated by photodynamic therapy

Lopera

Velásquez

Clementino

et al. 2018

Journal of Photochemistry and Photobiology B: Biology

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Photodynamic therapy has emerged as an alternative treatment for cutaneous leishmaniasis, and compounds with photocatalytic behavior are promising candidates to develop new therapeutic strategies for the treatment of this parasitic disease. Titanium dioxide TiO is a semiconductor ceramic material that shows excellent photocatalytic and antimicrobial activity under Ultraviolet irradiation. Due to the harmful effects of UV radiation, many efforts have been made in order to enhance both photocatalytic and antimicrobial properties of TiO in the visible region of the spectrum by doping or through modifications in the route of synthesis. Herein, Fe-, Zn-, or Pt- doped TiO nanostructures were synthesized by solution-combustion route. The obtained compounds presented aggregates of 100 nm, formed by particles smaller than 20 nm. Doping compounds shift the absorption spectrum towards the visible region, allowing production of reactive oxygen species in the presence of oxygen and molecular water when the system is irradiated in the visible spectrum. The Pt (EC = 18.2 ± 0.8 μg/mL) and Zn (EC = 16.4 ± 0.3 μg/mL) -doped TiO presented the higher antileishmanial activities under visible irradiation and their application as photosensitizers in photodynamic therapy (PDT) strategies for the treatment of cutaneous leishmaniasis should be considered.

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“…The technological and biomedical applications of transition metal oxide nanoparticles are attributed to their unique characteristics, such as a large surface area, confinement of the quantum effect, optical and magnetic properties, etc. In recent studies, Kaviyarasu et al [20,21] reported the synthesis of ZnO nanoparticles, for use in photocatalysis, antibacterial applications, and to reduce the cytotoxicity in a biological system of ZnO doped with TiO 2 .…”

Section: Introductionmentioning

confidence: 99%

Effect of Sonication Output Power on the Crystal Structure and Magnetism of SrFe12O19 Nanoparticles

et al. 2018

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Abstract:We reported the effect of the sonication output power (SOP), from 120, 180, to 240 W, on the crystal structure, morphology, and magnetic properties of SrFe 12 O 19 nanoparticles synthesized by sonochemical process assisted with heat treatment. X-ray Diffraction analysis of the obtained powder showed the formation of Fe 3 O 4 with low crystallinity degree, which increased with the increase in SOP, together in a crystalline phase identified as SrCO 3 . The formation of SrFe 12 O 19 started at 1073 K, and was completed at 1173 K. However, hexaferrite was obtained with the secondary phases α-Fe 2 O 3 and SrFeO 2.5 . At 1323 K, the secondary phases vanished, and a single phase SrFe 12 O 19 was detected. Vibrating Sample Magnetometry analysis showed that the SrFeO 2.5 phase caused the formation of a hysteresis loop known as the Perminvar magnetic hysteresis loop. At 1323 K, the powder synthesized at 120 W showed a specific magnetization of 67.15 Am 2 /kg at 1.43 × 10 6 A/m, and coercivity of 4.69 × 10 4 A/m, with a spherical-like morphology and average particle size of 56.81 nm obtained by Scanning Electron Microscopy analysis. The increment of SOP promoted a high degree of crystallinity and decrease in crystal size. Additionally, it promoted the formation of secondary phases, induced agglomeration, and modified the morphology of the particles.

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Elucidation of photocatalysis, photoluminescence and antibacterial studies of ZnO thin films by spin coating method

Cited by 223 publications

References 43 publications

The studies of cytotoxicity and antibacterial activity of composites with ZnO‐doped bioglass

The studies of cytotoxicity and antibacterial activity of composites with ZnO‐doped bioglass

Solution-combustion synthesis of doped TiO 2 compounds and its potential antileishmanial activity mediated by photodynamic therapy

Effect of Sonication Output Power on the Crystal Structure and Magnetism of SrFe12O19 Nanoparticles

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