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Atomic layers of graphene for microbial corrosion prevention

journal contribution
posted on 2023-06-09, 22:07 authored by Govind Chilkoor, Namita Shrestha, Alex Kutana, Manoj TripathiManoj Tripathi, Francisco C Robles Hernández, Boris I Yakobson, Meyya Meyyappan, Alan DaltonAlan Dalton, Pulickel M Ajayan, Muhammad M Rahman, Venkataramana Gadhamshetty
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.

History

Publication status

  • Published

Journal

ACS Nano

ISSN

1936-0851

Publisher

American Chemical Society

Department affiliated with

  • Physics and Astronomy Publications

Full text available

  • No

Peer reviewed?

  • Yes

Legacy Posted Date

2020-11-10

First Compliant Deposit (FCD) Date

2020-11-09

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