Antibacterial Activity of Polyethylenimine/Carrageenan Multilayer against Pathogenic Bacteria

Briones, Annabelle V.; Sato, Toshiharu; Bigol, Ursela G.

doi:10.4236/aces.2014.42026

Cited by 28 publications

(21 citation statements)

References 24 publications

(25 reference statements)

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“…XPS measurements were performed with a monochromatized Mg K α radiation source (hν = 1254 eV) with a power of 200 W. The analyzer pass energy and the step size were set to 30 eV and 0.1 eV, respectively. The spectra were referenced with respect to C 1 s peak at 284 eV [29]. After applying the Shirley background subtraction, the deconvolution process of the spectra was done with Gaussian-Lorentzian peak profile using CasaXPS software.…”

Section: Methodsmentioning

confidence: 99%

Growth of Cu2ZnSnS4 absorber layer on flexible metallic substrates for thin film solar cell applications

et al. 2015

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In this work, Cu 2 ZnSnS 4 (CZTS) absorber layers were fabricated using a two-stage process. Sequentially deposited Cu-Zn-Sn thin film layers on metallic foils were annealed in an Ar + S 2(g) atmosphere. We aimed to investigate the role of flexible titanium and molybdenum foil substrates in the growth mechanism of CZTS thin films. The Raman spectra and X-ray photoelectron spectroscopy analyses of the sulfurized thin films revealed that, except for the presence of Sn-based secondary phases, nearly pure CZTS thin films were obtained. Additionally, the intense and sharp X-ray diffraction peak from the (112) plane provided evidence of good crystallinity. Electron dispersive spectroscopy analysis indicated sufficient sulfur content but poor Zn atomic weight percentage in the films. Absorption and band-gap energy analyses were carried out to confirm the suitability of CZTS thin films as the absorber layer in solar cell applications. Hall effect measurements showed the p-type semiconductor behavior of the CZTS samples. Moreover, the back contact behavior of these metallic flexible substrates was investigated and compared. We detected formation of cracks in the CZTS layer on the molybdenum foils, which indicates the incompatibility of molybdenum's thermal expansion coefficient with the CZTS structure. We demonstrated the application of the magnetron sputtering technique for the fabrication of CZTS thin films on titanium foils having lightweight, flexible properties and suitable for roll-to-roll manufacturing for high throughput fabrication. Titanium foils are also cost competitive compared to molybdenum foils.

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Section: Methodsmentioning

confidence: 99%

Growth of Cu2ZnSnS4 absorber layer on flexible metallic substrates for thin film solar cell applications

et al. 2015

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“…PEI (polyetylénimín) (Obr. 1) je polykatión, ktorý sa využíva na zlepšenie biokompatibility a antibakteriálneho účinku povrchov [11].…”

Section: Biodegradable Metallic Implants Are Materials That Serve As unclassified

“…[23]. Pórovité vzorky čistého železa a železa povlakovaného PLGA [11] degradovali rýchlosťou 0,33 a 0,76 mm rok -1 . V prípade, že PLGA nebolo na povrchu vzoriek, ale bolo inkorporované v jeho štruktúre, rýchlosť degradácia vzrástla niekoľkonásobne, na 6,42 mm rok -1 .…”

Section: Experimentálna čAsťunclassified

Static corrosion tests of iron-based biomaterials in the environment of simulated body fluids

Gorejová

Oriňáková

Oriňák

et al. 2019

Koroze a Ochrana Materialu

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Biodegradable metallic implants are materials that serve as a temporary implants and scaffolds. They degrade directly in vivo and therefore eliminate need for secondary surgical intervention. They are often made of metals such as magnesium, iron, zinc and can be modified by coating with the inorganic or polymeric layer. In this work iron-based biomaterial was prepared and modified with polymeric (polyethyleneimine, PEI) layer. Its degradation behavior was studied under conditions of simulated body fluids at 37 ± 0.2 °C in the form of static immersion tests. It has been shown that the surface modification caused an acceleration of degradation of the material and also had an influence on the corrosion mechanism.

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“…Thus, the idea of using biocompatible bacterial‐resistant polyelectrolyte nanocoatings on the medical implants can provide great advances in the field of tissue engineering and regenerative medicine. So far, various synthetic and biopolymers have been explored for their proven antibacterial effect against the common infections spreading pathogenic strains of bacteria [46, 47].…”

Section: Anti‐bacterial Surfacesmentioning

confidence: 99%

Polyelectrolyte multilayers for bio‐applications: recent advancements

Pahal

Gakhar

Raichur

et al. 2017

IET nanobiotechnol.

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The synergistic relationship between structure and the bulk properties of polyelectrolyte multilayer (PEM) films has generated tremendous interest in their application for loading and release of bioactive species. Layer-by-layer assembly is the simplest, cost effective process for fabrication of such PEMs films, leading to one of the most widely accepted platforms for incorporating biological molecules with nanometre precision. The bulk reservoir properties of PEM films render them a potential candidate for applications such as biosensing, drug delivery and tissue engineering. Various biomolecules such as proteins, DNA, RNA or other desired molecules can be incorporated into the PEM stack via electrostatic interactions and various other secondary interactions such as hydrophobic interactions. The location and availability of the biological molecules within the PEM stack mediates its applicability in various fields of biomedical engineering such as programmed drug delivery. The development of advanced technologies for biomedical applications using PEM films has seen rapid progress recently. This review briefly summarises the recent successes of PEM being utilised for diverse bio-applications.

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Antibacterial Activity of Polyethylenimine/Carrageenan Multilayer against Pathogenic Bacteria

Cited by 28 publications

References 24 publications

Growth of Cu2ZnSnS4 absorber layer on flexible metallic substrates for thin film solar cell applications

Growth of Cu2ZnSnS4 absorber layer on flexible metallic substrates for thin film solar cell applications

Static corrosion tests of iron-based biomaterials in the environment of simulated body fluids

Polyelectrolyte multilayers for bio‐applications: recent advancements

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