Silver nanoparticles as antimicrobial agent: a case study on E. coli as a model for Gram-negative bacteria

Sondi, Ivan; Salopek‐Sondi, Branka

doi:10.1016/j.jcis.2004.02.012

Cited by 5,264 publications

(3,304 citation statements)

References 42 publications

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“…These phenomena lead to the degradation or death of the microorganisms. 46,47 Electrostatic attraction between bacterial cells and particles can also have an impact on antibacterial activity (AA), [47][48][49] whereas reactive oxygen species can damage lipids, proteins, and the DNA of microorganisms. 45 The AA of the nanofinished textiles was assessed in accordance with the International Standard ISO20743 (quantitative method).…”

Section: Resultsmentioning

confidence: 99%

Scalable and Environmentally Benign Process for Smart Textile Nanofinishing

Feng

Hontañón

Blanes

et al. 2016

ACS Appl. Mater. Interfaces

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A major challenge in nanotechnology is that of determining how to introduce green and sustainable principles when assembling individual nanoscale elements to create working devices.For instance, textile nanofinishing is restricted by the many constraints of traditional pad-drycure processes, such as the use of costly chemical procedures to produce nanoparticles (NPs), the high liquid and energy consumption, the production of harmful liquid waste, and multi-step batch operations. By integrating low-cost, scalable, and environmentally benign aerosol processes of the type proposed here into textile nanofinishing, these constraints can be circumvented while leading to a new class of fabrics. The proposed one-step textile nanofinishing process relies on the diffusional deposition of aerosol NPs onto textile fibers. As proof of this concept, we deposit Ag NPs onto a range of textiles and assess their antimicrobial properties for two strains of bacteria (i.e., Staphylococcus Aureus and Klebsiella Pneumoniae).The measurements show that the logarithmic reduction in bacterial count reaches ca. 5.5 (corresponding to a reduction efficiency of 99.96%) when the Ag loading is one order of magnitude less (10 ppm; i.e., 10 mg Ag NPs per kg of textile) than in the textiles treated by traditional wet-routes. The antimicrobial activity does not increase in proportion to the Ag content above 10 ppm as a consequence of a "saturation" effect. Such low loading for

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Section: Resultsmentioning

confidence: 99%

Scalable and Environmentally Benign Process for Smart Textile Nanofinishing

Feng

Hontañón

Blanes

et al. 2016

ACS Appl. Mater. Interfaces

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“…size dependent [28] . Lee et al [29] investigated the antibacterial effect of nanosized silver colloidal solution against Staphylococcus aureus (S. aureus) and Klebsiella pneumoniae after padding the solution on textile fabrics.…”

Section: Discussionmentioning

confidence: 99%

Catharanthus roseus: a natural source for the synthesis of silver nanoparticles

Mukunthan

Elumalai

Patel

et al. 2011

Asian Pacific Journal of Tropical Biomedicine

169

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“…Bacteria have been shown to be very sensitive to exposure to a variety of ENMs, including carbon nanotubes, ZnO, CdSe, and TiO 2 [107,108]. Silver nanoparticles have been studied extensively in the laboratory and have significant inhibitory effects on bacterial growth and activity [107,109,110], although Ag ions released by the NPs could have contributed to this toxicity [111,112]. Alterations to microbial communities could have significant effects on biogeochemical cycling and other critical ecosystem services [113].…”

Section: Bacterial Tests For Enmsmentioning

confidence: 99%

Ecotoxicity test methods for engineered nanomaterials: Practical experiences and recommendations from the bench

Handy

Cornelis

Fernandes

et al. 2011

Enviro Toxic and Chemistry

297

236

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Abstract-Ecotoxicology research is using many methods for engineered nanomaterials (ENMs), but the collective experience from researchers has not been documented. This paper reports the practical issues for working with ENMs and suggests nano-specific modifications to protocols. The review considers generic practical issues, as well as specific issues for aquatic tests, marine grazers, soil organisms, and bioaccumulation studies. Current procedures for cleaning glassware are adequate, but electrodes are problematic. The maintenance of exposure concentration is challenging, but can be achieved with some ENMs. The need to characterize the media during experiments is identified, but rapid analytical methods are not available to do this. The use of sonication and natural/synthetic dispersants are discussed. Nano-specific biological endpoints may be developed for a tiered monitoring scheme to diagnose ENM exposure or effect. A case study of the algal growth test highlights many small deviations in current regulatory test protocols that are allowed (shaking, lighting, mixing methods), but these should be standardized for ENMs. Invertebrate (Daphnia) tests should account for mechanical toxicity of ENMs. Fish tests should consider semistatic exposure to minimize wastewater and animal husbandry. The inclusion of a benthic test is recommended for the base set of ecotoxicity tests with ENMs. The sensitivity of soil tests needs to be increased for ENMs and shortened for logistics reasons; improvements include using Caenorhabditis elegans, aquatic media, and metabolism endpoints in the plant growth tests. The existing bioaccumulation tests are conceptually flawed and require considerable modification, or a new test, to work for ENMs. Overall, most methodologies need some amendments, and recommendations are made to assist researchers. Environ. Toxicol. Chem. 2012;31:15-31. # 2011 SETAC

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Silver nanoparticles as antimicrobial agent: a case study on E. coli as a model for Gram-negative bacteria

Cited by 5,264 publications

References 42 publications

Scalable and Environmentally Benign Process for Smart Textile Nanofinishing

Scalable and Environmentally Benign Process for Smart Textile Nanofinishing

Catharanthus roseus: a natural source for the synthesis of silver nanoparticles

Ecotoxicity test methods for engineered nanomaterials: Practical experiences and recommendations from the bench

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