Issue 40, 2012
From the journal:

Journal of Materials Chemistry

Antimicrobial effect of polydopamine coating on Escherichia coli†

Zafar Iqbal,*a   Edward P.C. Laib  and  Tyler J. Avisb  

* Corresponding authors

a Department of Food Technology and Rural Industries, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh
E-mail: Zafar_Iqbal@carleton.ca

b Department of Chemistry, Carleton University, 1125 Colonel By Drive, Ottawa, Canada
Fax: +1-613-520-3749
Tel: +1-613-520-2600 ext. 6099

Abstract

Discovery of new antimicrobials is highly desired due to the emergence of microorganisms that have multi-drug resistant capability. The purpose of this study was to investigate the antimicrobial effect of dopamine (DA) on Escherichia coli. DA's inhibitory activity was tested at different initial E. coli cell concentrations. Significant 3.5 and 4.2 log inhibitions were observed for 1 × 108 and 1 × 107 cells per mL, when compared to controls, corresponding to 99.97 and 99.99% inhibitions. Microscopic techniques (optical, fluorescence, and scanning electron) and Fourier transform infrared spectroscopy confirmed a polydopamine coating on the bacterial cells. Capillary electrophoresis with ultra-violet detection indicated a significant change in the cell structure caused by a low dose (100 mg L−1) of DA within 200 min of incubation.

Graphical abstract: Antimicrobial effect of polydopamine coating on Escherichia coli

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Article information

DOI
https://doi.org/10.1039/C2JM34825J
Article type
Paper
Submitted
21 Jul 2012
Accepted
29 Aug 2012
First published
29 Aug 2012

J. Mater. Chem., 2012,22, 21608-21612

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Antimicrobial effect of polydopamine coating on Escherichia coli

Z. Iqbal, E. P.C. Lai and T. J. Avis, J. Mater. Chem., 2012, 22, 21608 DOI: 10.1039/C2JM34825J

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