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

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dc.contributor.authorCOURROL, DANIELLA dos S.
dc.contributor.authorLOPES, CARLA R.B.
dc.contributor.authorCORDEIRO, THIAGO da S.
dc.contributor.authorFRANZOLIN, MARCIA R.
dc.contributor.authorVIEIRA JUNIOR, NILSON D.
dc.contributor.authorSAMAD, RICARDO E.
dc.contributor.authorCOURROL, LILIA C.
dc.coverageInternacionalpt_BR
dc.date.accessioned2018-05-30T13:30:52Z
dc.date.available2018-05-30T13:30:52Z
dc.date.issued2018pt_BR
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 mu j 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.sponsorshipIDFAPESP: 14/06960-9pt_BR
dc.format.extent233-238pt_BR
dc.identifier.citationCOURROL, DANIELLA dos S.; LOPES, CARLA R.B.; CORDEIRO, THIAGO da S.; FRANZOLIN, MARCIA R.; VIEIRA JUNIOR, NILSON D.; SAMAD, RICARDO E.; COURROL, LILIA C. Optical properties and antimicrobial effects of silver nanoparticles synthesized by femtosecond laser photoreduction. <b>Optics and Laser Technology</b>, v. 103, p. 233-238, 2018. DOI: <a href="https://dx.doi.org/10.1016/j.optlastec.2018.01.044">10.1016/j.optlastec.2018.01.044</a>. Disponível em: http://repositorio.ipen.br/handle/123456789/28889.
dc.identifier.doi10.1016/j.optlastec.2018.01.044pt_BR
dc.identifier.issn0030-3992pt_BR
dc.identifier.orcidhttps://orcid.org/0000-0001-7762-8961
dc.identifier.orcidhttps://orcid.org/0000-0003-0092-9357
dc.identifier.percentilfi76.54en
dc.identifier.percentilfiCiteScore77.00
dc.identifier.urihttp://repositorio.ipen.br/handle/123456789/28889
dc.identifier.vol103pt_BR
dc.relation.ispartofOptics and Laser Technologypt_BR
dc.rightsopenAccesspt_BR
dc.subjectnanoparticles
dc.subjectsilver
dc.subjectmicroorganisms
dc.subjectlaser radiation
dc.subjectescherichia coli
dc.subjectlasers
dc.titleOptical properties and antimicrobial effects of silver nanoparticles synthesized by femtosecond laser photoreductionpt_BR
dc.typeArtigo de periódicopt_BR
dspace.entity.typePublication
ipen.autorRICARDO ELGUL SAMAD
ipen.autorNILSON DIAS VIEIRA JUNIOR
ipen.autorTHIAGO DA SILVA CORDEIRO
ipen.codigoautor909
ipen.codigoautor1582
ipen.codigoautor3917
ipen.contributor.ipenauthorRICARDO ELGUL SAMAD
ipen.contributor.ipenauthorNILSON DIAS VIEIRA JUNIOR
ipen.contributor.ipenauthorTHIAGO DA SILVA CORDEIRO
ipen.date.recebimento18-05pt_BR
ipen.identifier.fi3.319pt_BR
ipen.identifier.fiCiteScore4.6
ipen.identifier.ipendoc24673pt_BR
ipen.identifier.iwosWoSpt_BR
ipen.range.fi3.000 - 4.499
ipen.range.percentilfi75.00 - 100.00
ipen.type.genreArtigo
relation.isAuthorOfPublicationb9c43c0c-87a6-4ebd-92ff-2515c4ac1d34
relation.isAuthorOfPublicationb5e4f489-bfb7-4e48-ae3a-eced2bb93a16
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sigepi.autor.atividadeCORDEIRO, THIAGO DA S.:3917:930:Npt_BR
sigepi.autor.atividadeVIEIRA JUNIOR, NILSON D.:1582:930:Npt_BR
sigepi.autor.atividadeSAMAD, RICARDO E.:909:930:Npt_BR
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