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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 GadhamshettyGraphene 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 NanoISSN
1936-0851Publisher
American Chemical SocietyExternal DOI
Department affiliated with
- Physics and Astronomy Publications
Full text available
- No
Peer reviewed?
- Yes
Legacy Posted Date
2020-11-10First Compliant Deposit (FCD) Date
2020-11-09Usage metrics
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