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Title: A long-term corrosion barrier with an insulating boron nitride monolayer
Authors: Shen, L
Zhao, Y
Wang, Y 
Song, R
Yao, Q
Chen, S
Chai, Y 
Issue Date: 2016
Publisher: Royal Society of Chemistry
Source: Journal of materials chemistry A, 2016, v. 4, no. 14, p. 5044-5050 How to cite?
Journal: Journal of materials chemistry A 
Abstract: Graphene has been demonstrated as an ultrathin and light-weight corrosion barrier because of its high impermeability. However, it fails to prevent the Cu corrosion over a long term because the high conductivity of graphene enables the formation of a galvanic cell and promotes the electrochemical reaction. Here we theoretically and experimentally study a boron nitride (BN) monolayer as a long-term corrosion barrier for Cu. Our density functional theory calculations show that the potential barrier for O2 to pass through BN is close to that of graphene. The long-term barrier characteristics of BN and graphene are comparably evaluated by aging in an ambient environment for 160 days. Morphological and spectroscopic characterization shows that a BN monolayer has much better long-term barrier performance than graphene. X-ray photoelectron spectroscopy analysis shows that the Cu2+ percentage of the aging Cu sample with a BN barrier is reduced by around 15 times compared with that covered by graphene. The superior long-term barrier performance of a BN monolayer can be understood to be a result of its high impermeability and insulating characteristics, which suppress the galvanic corrosion under the ambient environment. These studies reveal that a BN monolayer is a more effective long-term corrosion barrier than graphene.
ISSN: 2050-7488
EISSN: 2050-7496
DOI: 10.1039/c6ta01604a
Rights: The article is licensed under a Creative Commons Attribution 3.0 Unported (CC BY 3.0) <>
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