Antibacterial properties and <i>in vivo</i> studies of tannic acid-stabilized silver–halloysite nanomaterials

Stavitskaya, Anna; Shakhbazova, Christina Y.; Cherednichenko, Yuliya; Nigamatzyanova, Läysän; Fakhrullina, Gölnur; Khaertdinov, N. N.; Kuralbayeva, Galiya A.; Filimonova, Alla V.; Винокуров, В. А.; Fakhrullin, Rawil

doi:10.1180/clm.2020.17

Cited by 19 publications

(24 citation statements)

References 49 publications

(47 reference statements)

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“…For example, the reduction of E. coli ( 39 ) and Staphylococcus marcescens growth by the AgNP-loaded halloysite at 1 g × L –1 was observed. 33 , 40 We hypothesized that combining the halloysite and PMo with another effective biocide, such as AgNPs, would produce a composite with improved properties. We aimed to determine the MIC rather than to capture the antibacterial effect of the halloysite-based composite with PMo and AgNPs.…”

Section: Resultsmentioning

confidence: 99%

Natural Nanoclay-Based Silver–Phosphomolybdic Acid Composite with a Dual Antimicrobial Effect

et al. 2022

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The problem of microbial growth on various surfaces has increased concern in society in the context of antibiotic misuse and the spreading of hospital infections. Thus, the development of new, antibiotic-free antibacterial strategies is required to combat bacteria resistant to usual antibiotic treatments. This work reports a new method for producing an antibiotic-free antibacterial halloysite-based nanocomposite with silver nanoparticles and phosphomolybdic acid as biocides, which can be used as components of smart antimicrobial coatings. The composite was characterized by using energy-dispersive X-ray fluorescence spectroscopy and transmission electron microscopy. The release of phosphomolybdic acid from the nanocomposite was studied by using UV–vis spectroscopy. It was shown that the antibiotic-free nanocomposite consisting of halloysite nanotubes decorated with silver nanoparticles loaded with phosphomolybdic acid and treated with calcium chloride possesses broad antibacterial properties, including the complete growth inhibition of Staphylococcus aureus and Pseudomonas aeruginosa bacteria at a 0.5 g × L –1 concentration and Acinetobacter baumannii at a 0.25 g × L –1 concentration.

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Section: Resultsmentioning

confidence: 99%

Natural Nanoclay-Based Silver–Phosphomolybdic Acid Composite with a Dual Antimicrobial Effect

et al. 2022

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“…Pristine halloysite nanotubes are known to be biocompatible, which has been demonstrated in various cell cultures and organisms. When other nanoparticles are synthesized or adsorbed on the surface of clay tubes, their toxicity and behavior might be different from that of pristine nanotubes, which was previously reported based on in vitro and in vivo studies [15][16][17][18].…”

Section: Introductionmentioning

confidence: 97%

Biodistribution of Quantum Dots-Labelled Halloysite Nanotubes: A Caenorhabditis elegans In Vivo Study

et al. 2021

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Halloysite is a promising building block in nanoarchitectonics of functional materials, especially in the development of novel biomaterials and smart coatings. Understanding the behavior of materials produced using halloysite nanotubes within living organisms is essential for their safe applications. In this study, quantum dots of different compositions were synthesized on the surface of modified clay nanotubes, and the biodistribution of this hybrid material was monitored within Caenorhabditis elegans nematodes. The influence of the modification agent as well as the particles’ composition on physicochemical properties of hybrid nanomaterials was investigated. Several microscopy techniques, such as fluorescence and dark-field microscopy, were compared in monitoring the distribution of nanomaterials in nematodes’ organisms. The effects of QDs-halloysite composites on the nematodes’ life cycle were investigated in vivo. Our fluorescent hybrid probes induced no acute toxic effects in model organisms. The stable fluorescence and low toxicity towards the organisms suggest that the proposed synthesis procedure yields safe nanoarchitectonic materials that will be helpful in monitoring the behavior of nanomaterials inside living cells and organisms.

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“…Another positive feature of halloysite clay nanotubes is their biological and ecological biocompatibility. On the examples of heavy metal containing nanoparticles, it was shown that such systems possessed no acute toxicity to model cells and organisms [ 19 , 20 ].…”

Section: Introductionmentioning

confidence: 99%

Natural aluminosilicate nanotubes loaded with RuCo as nanoreactors for Fischer-Tropsch synthesis

Mazurova

Glotov

Котелев

et al. 2022

Science and Technology of Advanced Materials

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Following nanoarchitectural approach, mesoporous halloysite nanotubes with internal surface composed of alumina were loaded with 5–6 nm RuCo nanoparticles by sequential loading/reduction procedure. Ruthenium nanoclusters were loaded inside clay tube by microwave-assisted method followed by cobalt ions electrostatic attraction to ruthenium during wetness impregnation step. Developed nanoreactors with bimetallic RuCo nanoparticles were investigated as catalysts for the Fischer-Tropsch process. The catalyst with 14.3 wt.% of Co and 0.15 wt.% of Ru showed high activity (СO conversion reached 24.6%), low selectivity to methane (11.9%), CO 2 (0.3%), selectivity to C 5+ hydrocarbons of 79.1% and chain growth index (α) = 0.853. Proposed nanoreactors showed better selectivity to target products combined with high activity in comparison to the similar bimetallic systems supported on synthetic porous materials. It was shown that reducing agent (NaBH 4 or H 2 ) used to obtain Ru nanoclusters at first synthesis step played a very important role in the reducibility and selectivity of resulting RuCo catalysts.

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Antibacterial properties and in vivo studies of tannic acid-stabilized silver–halloysite nanomaterials

Cited by 19 publications

References 49 publications

Natural Nanoclay-Based Silver–Phosphomolybdic Acid Composite with a Dual Antimicrobial Effect

Natural Nanoclay-Based Silver–Phosphomolybdic Acid Composite with a Dual Antimicrobial Effect

Biodistribution of Quantum Dots-Labelled Halloysite Nanotubes: A Caenorhabditis elegans In Vivo Study

Natural aluminosilicate nanotubes loaded with RuCo as nanoreactors for Fischer-Tropsch synthesis

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