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Nanoparticles affect bacterial colonies’ optical diffraction patterns


It is increasingly being accepted that bacteria are able to alter their shape/colony pattern in response to environmental adverse condition. Morphological adaptation of bacteria is known as one of their defence mechanisms against environmental stress/variations. As nanoparticles (NPs) have a unique capacity to induce a wide range of stresses to bacteria, we hypothesized that such NPs can affect the bacterial colony pattern. To test this hypothesize, we have incubated a series of superparamagnetic iron oxide nanoparticles (SPIONs) with different physicochemical properties with bacterial colonies and probed their colonies’ diffraction patterns by laser. Diffraction patterns of Escherichia coli, Lactobacillus rhamnosus, and Staphylococcus aureus colonies were recorded using laser. Our results revealed that the formation of distinct bacterial diffraction patterns in response to SPIONs with various concentration and surface chemistries. Our results may pave a way for development on new optical approaches for high-throughput screening of bacterial-NPs/drugs interactions.

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Publication details

The article was received on 19 Nov 2018, accepted on 06 Jan 2019 and first published on 07 Jan 2019

Article type: Communication
DOI: 10.1039/C8NR09332F
Citation: Nanoscale, 2019, Accepted Manuscript
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    Nanoparticles affect bacterial colonies’ optical diffraction patterns

    P. Sasanpour, A. Dilmaghani-Marand, H. Montazeri, S. Ivani, M. J. Hajipour and M. Mahmoudi, Nanoscale, 2019, Accepted Manuscript , DOI: 10.1039/C8NR09332F

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