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Abstract Nanomaterial Biocompatibility and Antimicrobial Effects on Escherichia coli

Nanomaterial Biocompatibility and Antimicrobial Effects on Escherichia coli

Fahmi Sanober, Siti Khadijah Ahmad,Wan Wardatul Amani Wan Salim*

Department of Biochemical and Biotechnology Engineering, Kulliyyah of Engineering, International Islamic University Malaysia, 50728 Gombak, Kuala Lumpur, Malaysia.

* Author for correspondence: Wan Wardatul Amani Wan Salim
Department of Biochemical and Biotechnology Engineering, Kulliyyah of Engineering, International Islamic University Malaysia, 50728 Gombak, Kuala Lumpur, Malaysia.
Tel: + 60 3 6196 Ext: 6563; Email: This email address is being protected from spambots. You need JavaScript enabled to view it.


Abstract.

We studied the effects of cultivating E. coli with nanomaterials involved in biosensor development. E. coli were cultured separately with each of these nanomaterials in Luria-Bertani broth medium. Bacterial growth curves were plotted by measuring optical density over a period of 12 hours, after which time bacterial cell dry weight was measured. After 12 hours of incubation, optical density was 0.588, 0.983, and 0.633 and cell dry weight was 4.6 × 10-3 g/ml, 4.9 × 10-3 g/ml, and 4.1 × 10-3 g/ml for bacteria cultivated in the presence of CNTs, AgNPs, and AuNPs respectively, suggesting that these nanomaterials have bactericidal or antimicrobial properties. On the other hand, graphene oxide (GO) does not have intrinsic bactericidal, cytotoxic, and/or antibacterial properties and greatly enhances bacterial growth. These findings advance our knowledge concerning the properties of nanomaterials and can guide the selection of appropriate nanomaterials for the fabrication of the transducer layer of a biosensor.

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