Bacteria Capture and Inactivation with Functionalized Multi-Walled Carbon Nanotubes (MWCNTs).

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ID: 42670
2020
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Abstract
Bacteria capture and inactivation with multi-walled carbon nanotubes (MWCNTs) was investigated in this study. Raw MWCNTs (r-MWCNTs) was oxidized in mixed acid, yielding functionalized MWCNTs (f-MWCNTs) with carboxyl and hydroxyl group. UV-Vis absorption spectra and transmission electron microscope (TEM) shown that surface modifications led to elevated dispersity and stability of f-MWCNTs. The antimicrobial activities of f-MWCNTs to bacterial pathogen were further explored. Both the colony forming count method and OD growth assay demonstrated that individually dispersed f-MWCNTs showed a higher antibacterial activity compared to r-MWCNT aggregates, suggesting that dispersity of MWCNTs play an important role to antibacterial effect of CNTs. In addition, viability of bacterial cells treated with f-MWCNTs was found to be incubation time-dependent, however no correlation between incubation shaking speed and antibacterial activity of f-MWCNTs was observed. SEM and TEM prove that f-MWCNTs mostly wound around surfaces of cells instead of piecing into the bacterial cells. This is a convincing proof of physical sorption other than physical punctures, contributing to the possible antimicrobial mechanism of f-MWCNTs to bacterial cells.
Reference Key
ding2020bacteriajournal Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Lijun Ding, Hao Wang, Dan Liu, Xin-An Zeng, Yiqin Mao
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Journal Journal of nanoscience and nanotechnology
Year 2020
DOI
10.1166/jnn.2020.17332
URL
Keywords
bioactivities starch derivatives urea groups

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