Effect of Precursor on Antifouling Efficacy of Vertically-Oriented Graphene Nanosheets
AbstractAntifouling efficacy of graphene nanowalls, i.e., substrate-bound vertically-oriented graphene nanosheets, has been demonstrated against biofilm-forming Gram-positive and Gram-negative bacteria. Where graphene nanowalls are typically prepared using costly high-temperature synthesis from high-purity carbon precursors, large-scale applications demand efficient, low-cost processes. The advancement of plasma enabled synthesis techniques in the production of nanomaterials has opened a novel and effective method for converting low-cost natural waste resources to produce nanomaterials with a wide range of applications. Through this work, we report the rapid reforming of sugarcane bagasse, a low-value by-product from sugarcane industry, into high-quality vertically-oriented graphene nanosheets at a relatively low temperature of 400 °C. Electron microscopy showed that graphene nanowalls fabricated from methane were significantly more effective at preventing surface attachment of Gram-negative rod-shaped Escherichia coli compared to bagasse-derived graphene, with both surfaces showing antifouling efficacy comparable to copper. Attachment of Gram-positive coccal Staphylococcus aureus was lower on the surfaces of both types of graphene compared to that on copper, with bagasse-derived graphene being particularly effective. Toxicity to planktonic bacteria estimated as a reduction in colony-forming units as a result of sample exposure showed that both graphenes effectively retarded cell replication. View Full-Text
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Prasad, K.; Bandara, C.D.; Kumar, S.; Singh, G.P.; Brockhoff, B.; Bazaka, K.; Ostrikov, K.K. Effect of Precursor on Antifouling Efficacy of Vertically-Oriented Graphene Nanosheets. Nanomaterials 2017, 7, 170.
Prasad K, Bandara CD, Kumar S, Singh GP, Brockhoff B, Bazaka K, Ostrikov KK. Effect of Precursor on Antifouling Efficacy of Vertically-Oriented Graphene Nanosheets. Nanomaterials. 2017; 7(7):170.Chicago/Turabian Style
Prasad, Karthika; Bandara, Chaturanga D.; Kumar, Shailesh; Singh, Gurinder P.; Brockhoff, Bastian; Bazaka, Kateryna; Ostrikov, Kostya K. 2017. "Effect of Precursor on Antifouling Efficacy of Vertically-Oriented Graphene Nanosheets." Nanomaterials 7, no. 7: 170.
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