Optical properties and antimicrobial effects of silver nanoparticles synthesized by femtosecond laser photoreduction

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dc.contributorLab. Bacteriologiapt_BR
dc.contributor.authorCourrol, Daniella dos Santospt_BR
dc.contributor.authorBorges Lopes, Carla Reginapt_BR
dc.contributor.authorCordeiro, Thiago da Silvapt_BR
dc.contributor.authorFranzolin, Marcia Reginapt_BR
dc.contributor.authorVieira Junior, Nilson Diaspt_BR
dc.contributor.authorSarnad, Ricardo Elgulpt_BR
dc.contributor.authorCourrol, Lilia Coronatopt_BR
dc.date.accessioned2020-07-09T21:19:04Z-
dc.date.available2020-07-09T21:19:04Z-
dc.date.issued2018pt_BR
dc.identifier.citationCourrol DS, Borges Lopes CR, Cordeiro TS, Franzolin MR, Vieira Junior ND, Sarnad RE, et al. Optical properties and antimicrobial effects of silver nanoparticles synthesized by femtosecond laser photoreduction. Opt Laser Technol. 2018 Jul;103:233-8. doi:10.1016/j.optlastec.2018.01.044.pt_BR
dc.identifier.urihttps://repositorio.butantan.gov.br/handle/butantan/2395-
dc.description.abstractSilver nanoparticles exhibit a powerful antimicrobial action showing a pronounced potential to be widely used against drug resistance bacteria. The present work describes the optical properties and antimicrobial effect of silver nanoparticles produced by femtosecond laser photoreduction of AgNO3 in the presence of tryptophan water solution. The advantages of this method are the absence of hazardous chemical reducing agents in the solution, and the versatile dimensional control achieved. The synthesized silver nanoparticles were characterized by absorption and fluorescence spectroscopy and their antibacterial activity were determined by monitoring the cell viability of Escherichia coli. The effects of the silver nanoparticles concentration and laser parameters (exposure time and pulse energy), on the formation of the nanoparticles, and its influence on the bacteria growth inhibition were studied. The prepared silver nanoparticles exhibited suitable antimicrobial properties. The results demonstrated that the nanoparticles concentration plays an important role in their bactericidal efficacy. The increase in the laser energy caused an increase in E. coli growth inhibition. Irradiations with energies around 300?µJ for 60?min presented high antimicrobial activity due to the presence of kynurenine, sub product of tryptophan photolysis. The first-time formation mechanism of tryptophan silver nanoparticles in high optical intensities was also discussed.pt_BR
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)pt_BR
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)pt_BR
dc.format.extentp. 233-238pt_BR
dc.language.isoEnglishpt_BR
dc.relation.ispartofOptics and Laser Technologypt_BR
dc.titleOptical properties and antimicrobial effects of silver nanoparticles synthesized by femtosecond laser photoreductionpt_BR
dc.typeArticlept_BR
dc.identifier.doi10.1016/j.optlastec.2018.01.044pt_BR
dc.identifier.urlhttps://doi.org/10.1016/j.optlastec.2018.01.044pt_BR
dc.contributor.externalUniversidade Federal de São Paulo (UNIFESP)¦¦Brasilpt_BR
dc.contributor.externalInstituto de Pesquisas Energéticas e Nucleares (IPEN)¦¦Brasilpt_BR
dc.identifier.citationvolume103pt_BR
dc.subject.keywordSilver nanoparticlespt_BR
dc.subject.keywordMicroorganismspt_BR
dc.subject.keywordLaserpt_BR
dc.subject.keywordFemtosecondpt_BR
dc.subject.keywordTryptophanpt_BR
dc.relation.ispartofabbreviatedOpt Laser Technolpt_BR
dc.identifier.citationabntv. 103, p. 233-238, jul. 2018pt_BR
dc.identifier.citationvancouver2018 Jul;103:233-8pt_BR
dc.contributor.butantanFranzolin, Marcia Regina|:Pesquisador|:Lab. Bacteriologia|:pt_BR
dc.contributor.butantanCourrol, Daniella dos Santos|:Aluno|:Lab. Bacteriologia|:PrimeiroAutor:Autor de correspondênciapt_BR
dc.sponsorship.butantanConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)¦¦pt_BR
dc.sponsorship.butantanFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)¦¦2014/06960-9pt_BR
dc.identifier.bvsccBR78.1pt_BR
dc.identifier.bvsdbIBProdpt_BR
dc.description.dbindexedYespt_BR
item.openairetypeArticle-
item.fulltextCom Texto completo-
item.grantfulltextembargo_29990101-
item.languageiso639-1English-
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