Photothermal inactivation of heat-resistant bacteria on nanoporous gold disk arrays

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dc.contributor.authorSantos, Greggy M.
dc.contributor.authorFerrara, Felipe Ibañez de Santi
dc.contributor.authorZhao, Fusheng
dc.contributor.authorRodrigues, Debora F.
dc.contributor.authorShih, Wei-Chuan
dc.date.accessioned2020-03-10T18:19:21Z
dc.date.available2020-03-10T18:19:21Z
dc.date.issued4/1/2016
dc.description.abstractA rapid photothermal bacterial inactivation technique has been developed by irradiating near-infrared (NIR) light onto bacterial cells (Escherichia coli, Bacillus subtilis, Exiguobacterium sp. AT1B) deposited on surfaces coated with a dense, random array of nanoporous gold disks (NPGDs). With the use of cell viability tests and SEM imaging results, the complete inactivation of the pathogenic and heat-resistant bacterial model strains is confirmed within ~25 s of irradiation of the NPGD substrate. In addition to irradiation control experiments to prove the efficacy of the bacterial inactivation, thermographic imaging showed an immediate averaged temperature rise above 200 °C within the irradiation spot of the NPGD substrate. The light-gated photothermal effects on the NPGD substrate offers potential applications for antimicrobial and nanotherapeutic devices due to strong light absorption in the tissue optical window, i.e., the NIR wavelengths, and robust morphological structure that can withstand high instantaneous thermal shocks.
dc.identifier.citationCopyright 2016 Optical Materials Express. Recommended citation: Santos, Greggy M., Felipe Ibañez de Santi Ferrara, Fusheng Zhao, Debora F. Rodrigues, and Wei-Chuan Shih. "Photothermal inactivation of heat-resistant bacteria on nanoporous gold disk arrays." Optical Materials Express 6, no. 4 (2016): 1217-1229. DOI: 10.1364/OME.6.001217 URL: https://www.osapublishing.org/ome/abstract.cfm?uri=ome-6-4-1217 Reproduced in accordance with the original publisher’s licensing terms and with permission from the author(s).
dc.identifier.urihttps://hdl.handle.net/10657/6013
dc.language.isoen_US
dc.publisherOptical Materials Express
dc.subjectN/A
dc.titlePhotothermal inactivation of heat-resistant bacteria on nanoporous gold disk arrays
dc.typeArticle

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