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Title: Single-Step Process toward Achieving Superhydrophobic Reduced Graphene Oxide
Authors: Li, Zhong
Tang, Xiu-Zhi
Zhu, Wenyu
Thompson, Brianna C.
Huang, Mingyue
Yang, Jinglei
Hu, Xiao
Khor, Khiam Aik
Keywords: Antibacterial nanomaterials
Graphene oxide
Issue Date: 2016
Source: Li, Z., Tang, X.-Z., Zhu, W., Thompson, B. C., Huang, M., Yang, J., et al. (2016). A Single-Step Process toward Achieving Superhydrophobic Reduced Graphene Oxide. ACS Applied Materials & Interfaces, 8(17), 10985-10994.
Series/Report no.: ACS Applied Materials & Interfaces
Abstract: We report the first use of spark plasma sintering (SPS) as a single-step process to achieve superhydrophobic reduced graphene oxide (rGO). It was found that SPS was capable of converting smooth and electrically insulating graphene oxide (GO) sheets into highly electrically conductive rGO with minimum residual oxygen and hierarchical roughness which could be well retained after prolonged ultrasonication. At a temperature of 500 °C, which is lower than the conventional critical temperature for GO exfoliation, GO was successfully exfoliated, reduced, and hierarchically roughened. rGO fabricated by only 1 min of treatment at 1050 °C was superhydrophobic with a surface roughness (Ra) 10 times as large as that of GO as well as an extraordinarily high C:O ratio of 83.03 (atom %) and water contact angle of 153°. This demonstrates that SPS is a superior GO reduction technique, which enabled superhydrophobic rGO to be quickly and effectively achieved in one single step. Moreover, the superhydrophobic rGO fabricated by SPS showed an impressive bacterial antifouling and inactivation effect against Escherichia coli in both aqueous solution and the solid state. It is envisioned that the superhydrophobic rGO obtained in this study can be potentially used for a wide range of industrial and biomedical applications, such as the fabrication of self-cleaning and antibacterial surfaces.
ISSN: 1944-8244
DOI: 10.1021/acsami.6b01227
Rights: © 2016 American Chemical Society (ACS). This is the author created version of a work that has been peer reviewed and accepted for publication by ACS Applied Materials & Interfaces, American Chemical Society (ACS). It incorporates referee’s comments but changes resulting from the publishing process, such as copyediting, structural formatting, may not be reflected in this document. The published version is available at: [].
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:CEE Journal Articles
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