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Effect of Precursor on Antifouling Efficacy of Vertically-Oriented Graphene Nanosheets

School of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology, Brisbane, QLD 4000, Australia
CSIRO-QUT Joint Sustainable Processes and Devices Laboratory, Commonwealth Scientific and Industrial Research Organisation, P.O. Box 218, Lindfield, NSW 2070, Australia
Author to whom correspondence should be addressed.
Nanomaterials 2017, 7(7), 170;
Received: 20 May 2017 / Revised: 27 June 2017 / Accepted: 30 June 2017 / Published: 4 July 2017
Antifouling 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
Keywords: graphene; nanowalls; plasma-enabled synthesis graphene; nanowalls; plasma-enabled synthesis
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MDPI and ACS Style

Prasad, K.; Bandara, C.D.; Kumar, S.; Singh, G.P.; Brockhoff, B.; Bazaka, K.; Ostrikov, K. Effect of Precursor on Antifouling Efficacy of Vertically-Oriented Graphene Nanosheets. Nanomaterials 2017, 7, 170.

AMA Style

Prasad K, Bandara CD, Kumar S, Singh GP, Brockhoff B, Bazaka K, Ostrikov K. Effect of Precursor on Antifouling Efficacy of Vertically-Oriented Graphene Nanosheets. Nanomaterials. 2017; 7(7):170.

Chicago/Turabian Style

Prasad, Karthika, Chaturanga D. Bandara, Shailesh Kumar, Gurinder P. Singh, Bastian Brockhoff, Kateryna Bazaka, and Kostya Ostrikov 2017. "Effect of Precursor on Antifouling Efficacy of Vertically-Oriented Graphene Nanosheets" Nanomaterials 7, no. 7: 170.

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