Atomic layers of graphene for microbial corrosion prevention

Chilkoor, Govind, Shrestha, Namita, Kutana, Alex, Tripathi, Manoj, Hernández, Francisco C Robles, Yakobson, Boris I, Meyyappan, Meyya, Dalton, Alan B, Ajayan, Pulickel M, Rahman, Muhammad M and Gadhamshetty, Venkataramana (2020) Atomic layers of graphene for microbial corrosion prevention. ACS Nano. ISSN 1936-0851

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Graphene is a promising material for many biointerface applications in engineering, medical, and life-science domains. Here, we explore the protection ability of graphene atomic layers to metals exposed to aggressive sulfate-reducing bacteria implicated in corrosion. Although the graphene layers on copper (Cu) surfaces did not prevent the bacterial attachment and biofilm growth, they effectively restricted the biogenic sulfide attack. Interestingly, single-layered graphene (SLG) worsened the biogenic sulfide attack by 5-fold compared to bare Cu. In contrast, multilayered graphene (MLG) on Cu restricted the attack by 10-fold and 1.4-fold compared to SLG-Cu and bare Cu, respectively. We combined experimental and computational studies to discern the anomalous behavior of SLG-Cu compared to MLG-Cu. We also report that MLG on Ni offers superior protection ability compared to SLG. Finally, we demonstrate the effect of defects, including double vacancy defects and grain boundaries on the protection ability of atomic graphene layers.

Item Type: Article
Schools and Departments: School of Mathematical and Physical Sciences > Physics and Astronomy
SWORD Depositor: Mx Elements Account
Depositing User: Mx Elements Account
Date Deposited: 10 Nov 2020 11:39
Last Modified: 15 Jan 2021 16:16

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