Antibacterial effect of TiO2 nanoparticles modified with APTES

Rokicka-Konieczna, Paulina; Wanag, Agnieszka; Sienkiewicz, Agnieszka; Kusiak-Nejman, Ewelina; Morawski, Antoni W.

doi:10.1016/j.catcom.2019.105862

Cited by 45 publications

(19 citation statements)

References 24 publications

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“…• Wastewater treatment with innovative materials (eg, graphene sheet or bio-composite [101][102][103] ); • Engineered Nano systems for oil recovery and environmental remediation [104,105] ; • Next generation 2D and 3D NP characterization, such as nanotube or nano-flowers [106,107] ; • Design of innovative drug delivery systems based on the fluid-carrier interaction [108,109] ; • Investigation of the transport properties, and the fate of NP in groundwaters [84,110] ; • Synthesis of green based antibacterial, antioxidant, materials [111][112][113] ; and • Complex colloidal systems characterization, for example, emulsion gels or pickering emulsions. [114,115] Due to the relatively simplicity of the ZP technique, and the increasing interest in colloids and NPs, ZP will play an even bigger role among the conventional characterization methods.…”

Section: Discussionmentioning

confidence: 99%

Experimental methods in chemical engineering: Zeta potential

et al. 2021

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Zeta potential (ZP) is a parameter that expresses the electrochemical equilibrium between particles and liquids like in nanoparticle (NP) colloidal solutions with applications in medicine, pharmaceuticals, chemical production, mineral processing, and water and soil purification. Smoluchowski's theory applies to the ZP particles that are larger the interfacial layer but neglects surface conductivity. The Debye-Hückel theory correctly approximates the concentration of ions in a double layer but fails to account for the dependence of ZP on the concentration of counterions. Determining ZP of NPs is essential to proper NP characterization. For instance, developing well-defined therapeutic-relevant nanoformulations needs information on NPs size, surface charge, stability and agglomeration behaviour. This approach has many practical challenges, from inadequate knowledge of operating standards to sampling, data interpretation and good laboratory practice for the experiments replicability. However, in drug delivery research, very little literature can provide a clear, succinct explanation of these techniques. Looking for specific guidelines to overcome frequently encountered problems during ZP measurements. This article explores factors influencing colloidal particle stability. Measurement criteria such as applied voltage, number of measurements, electrophoretic mobility (EPM), size distribution, surface shape, temperature, viscosity, particle concentration, zeta potential, nanoparticles, colloidal suspension, electrophoretic mobility, and pH.

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Section: Discussionmentioning

confidence: 99%

Experimental methods in chemical engineering: Zeta potential

et al. 2021

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“…Similarly, Liu et al [25] observed no inhibition of the growth of E. coli by pure TiO 2 NPs at 0.5 g/L in the dark and under the light. Rokicka-Konieczna et al [26] showed no inhibition of the growth of E. coli K12 (ATCC 29,425) in the dark in the presence of 0.1 g/L of TiO 2 NPs (anatase, crystallite size 14 nm). Sethi and Sakthivel [27] showed no inhibition of the growth of E. coli by pure anatase (titania) in the dark in the presence of 0.5 mg/mL of TiO 2 NPs.…”

Section: Discussionmentioning

confidence: 99%

Effect of TiO2 on Selected Pathogenic and Opportunistic Intestinal Bacteria

Baranowska‐Wójcik

Szwajgier

Gustaw

2021

Biol Trace Elem Res

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Food-grade titanium dioxide (TiO2) containing a nanoparticle fraction (TiO2 NPs-nanoparticles) is widely used as a food additive (E171 in the EU). In recent years, questions concerning its effect on the gastrointestinal microbiota have been raised. In the present study, we examined interactions between bacteria and TiO2. The study involved six pathogenic/opportunistic bacterial strains and four different-sized TiO2 types: three types of food-grade E171 compounds and TiO2 NPs (21 nm). Each bacterial strain was exposed to four concentrations of TiO2 (60, 150, 300, and 600 mg/L TiO2). The differences in the growth of the analyzed strains, caused by the type and concentration of TiO2, were observed. The growth of a majority of the strains was shown to be inhibited after exposure to 300 and 600 mg/L of the food-grade E171 and TiO2 NPs.

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“…An excellent benefit of using acid etching is that, regardless of the material's shape and size, a homogenous roughening of the material can be obtained [14,15]. Chemical etching is the simplest and cheapest method for enabling the application of additional layers to the ceramic surface, i.e., oxides or nitride layers, and may allow for a controlled modification of the surface development; the application of additional functional groups, i.e., carboxyl, amine, or hydroxyl [16][17][18], is also possible.…”

Section: Introductionmentioning

confidence: 99%

Alkali-Treated Alumina and Zirconia Powders Decorated with Hydroxyapatite for Prospective Biomedical Applications

et al. 2022

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The alumina and zirconia surfaces were pretreated with chemical etching using alkaline mixtures of ammonia, hydrogen peroxide and sodium hydroxide, and followed with application of the powder layer of Ca-deficient hydroxyapatite (CDH). The influence of etching bath conditions time and concentration on surface development, chemical composition and morphology of medicinal ceramic powders were studied. The following analyses were performed: morphology (scanning electron microscopy), phase composition (X-ray diffraction analysis), changes in binding interactions and chemical composition (FT-Infrared and Energy dispersive spectroscopies). Both types of etchants did not expose the original phase composition changes or newly created phases for both types of ceramics. Subsequent decoration of the surface with hydroxyapatite revealed differences in the morphological appearance of the layer on both ceramic surfaces. The treated zirconia surface accepted CDH as a flowing layer on the surface, while the alumina was decorated with individual CDH aggregates. The goal of this study was to focus further on the ceramic fillers for polymer-ceramic composites used as a biomaterial in dental prosthetics.

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Antibacterial effect of TiO2 nanoparticles modified with APTES

Cited by 45 publications

References 24 publications

Experimental methods in chemical engineering: Zeta potential

Experimental methods in chemical engineering: Zeta potential

Effect of TiO2 on Selected Pathogenic and Opportunistic Intestinal Bacteria

Alkali-Treated Alumina and Zirconia Powders Decorated with Hydroxyapatite for Prospective Biomedical Applications

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