Antimicrobial applications of electroactive PVK-SWNT nanocomposites

Farid Ahmed, Catherine M. Santos, Regina Aileen May V Vergara, Maria Celeste R Tria, Rigoberto Advincula, Debora F. Rodrigues

Research output: Contribution to journalArticle

58 Citations (Scopus)

Abstract

The antibacterial properties of a nanocomposite containing an electroactive polymer, polyvinyl-N-carbazole (PVK) (97 wt %), and single-walled carbon nanotubes (SWNT) (3 wt %) was investigated as suspensions in water and as thin film coatings. The toxic effects of four different PVK-SWNT (97:3 wt %) nanocomposite concentrations (1, 0.5, 0.05, and 0.01 mg/mL) containing 0.03, 0.015, 0.0015, and 0.0003 mg/mL of SWNT, respectively, were determined for planktonic cells and biofilms of Escherichia coli (E. coli) and Bacillus subtilis (B. subtilis). The results showed that the nanocomposite PVK-SWNT had antibacterial activity on planktonic cells and biofilms at all concentration levels. Higher bacterial inactivation (94% for E. coli and 90% for B. subtilis) were achieved in planktonic cells at a PVK-SWNT concentration of 1 mg/mL. Atomic force microscopy (AFM) imaging showed significant reduction of biofilm growth on PVK-SWNT coated surfaces. This study established for the first time that the improved dispersion of SWNTs in aqueous solutions in the presence of PVK enhances the antimicrobial effects of SWNTs at very low concentrations. Furthermore, PVK-SWNT can be used as an effective thin film coating material to resist biofilm formation.

Original languageEnglish
Pages (from-to)1804-1810
Number of pages7
JournalEnvironmental Science and Technology
Volume46
Issue number3
DOIs
Publication statusPublished - 2012 Feb 7
Externally publishedYes

Fingerprint

Single-walled carbon nanotubes (SWCN)
Nanocomposites
Biofilms
biofilm
Bacilli
Escherichia coli
coating
Thin films
Coatings
atomic force microscopy
Poisons
carbon nanotube
Atomic force microscopy
Suspensions
Polymers
aqueous solution
polymer
Imaging techniques
Water

ASJC Scopus subject areas

  • Chemistry(all)
  • Environmental Chemistry

Cite this

Ahmed, F., Santos, C. M., Vergara, R. A. M. V., Tria, M. C. R., Advincula, R., & Rodrigues, D. F. (2012). Antimicrobial applications of electroactive PVK-SWNT nanocomposites. Environmental Science and Technology, 46(3), 1804-1810. https://doi.org/10.1021/es202374e

Antimicrobial applications of electroactive PVK-SWNT nanocomposites. / Ahmed, Farid; Santos, Catherine M.; Vergara, Regina Aileen May V; Tria, Maria Celeste R; Advincula, Rigoberto; Rodrigues, Debora F.

In: Environmental Science and Technology, Vol. 46, No. 3, 07.02.2012, p. 1804-1810.

Research output: Contribution to journalArticle

Ahmed, F, Santos, CM, Vergara, RAMV, Tria, MCR, Advincula, R & Rodrigues, DF 2012, 'Antimicrobial applications of electroactive PVK-SWNT nanocomposites', Environmental Science and Technology, vol. 46, no. 3, pp. 1804-1810. https://doi.org/10.1021/es202374e
Ahmed F, Santos CM, Vergara RAMV, Tria MCR, Advincula R, Rodrigues DF. Antimicrobial applications of electroactive PVK-SWNT nanocomposites. Environmental Science and Technology. 2012 Feb 7;46(3):1804-1810. https://doi.org/10.1021/es202374e
Ahmed, Farid ; Santos, Catherine M. ; Vergara, Regina Aileen May V ; Tria, Maria Celeste R ; Advincula, Rigoberto ; Rodrigues, Debora F. / Antimicrobial applications of electroactive PVK-SWNT nanocomposites. In: Environmental Science and Technology. 2012 ; Vol. 46, No. 3. pp. 1804-1810.
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