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  • “School of Nano-Sciences”

     
    Paper   IPM / Nano-Sciences / 15517
       School of Nano Science
      Title: Nanoparticles affect bacterial colonies' optical diffraction patterns
      Author(s):
    1 . Pezhman Sasanpour
    2 . Arezou Dilmaghani Marand
    3 . Hojatollah Montazeri
    4 . Saeed Ivani
    5 . Mohammad Javad Hajipour
    6 . Morteza Mahmoudi
      Status: To Appear
      Journal: Nanoscale
      Vol.: 11
      Pages: 2594
      Publisher(s): The Royal Society of Chemistry
      Supported by: IPM
      Abstract:
    It is increasingly being accepted that bacteria are able to alter their shape/colony pattern in response to adverse environmental conditions. 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 hypothesis, we incubated a series of superparamagnetic iron oxide nanoparticles (SPIONs) with different physicochemical properties with bacterial colonies and probed the colonies' diffraction patterns by laser. The diffraction patterns of Escherichia coli, Lactobacillus rhamnosus, and Staphylococcus aureus colonies were recorded using a laser. Our results revealed the formation of distinct bacterial diffraction patterns in response to SPIONs with various concentrations and surface chemistries. Our results may pave the way toward the development of new optical approaches for the high-throughput screening of bacterial-NPs/drugs interactions.

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