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Article

3D Hierarchical Polyaniline–Metal Hybrid Nanopillars: Morphological Control and Its Antibacterial Application

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Center for Nano Bio Development, National NanoFab Center (NNFC), 291 Daehak-ro, Yuseong-gu, Daejeon 34141, Korea
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Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Daejeon 34141, Korea
3
Department of Chemical Engineering, Kangwon National University, Samcheok 25913, Korea
*
Authors to whom correspondence should be addressed.
Academic Editor: Miguel Gama
Nanomaterials 2021, 11(10), 2716; https://doi.org/10.3390/nano11102716
Received: 10 September 2021 / Revised: 11 October 2021 / Accepted: 11 October 2021 / Published: 14 October 2021
Effective and reliable antibacterial surfaces are in high demand in modern society. Although recent works have shown excellent antibacterial performance by combining unique hierarchical nanotopological structures with functional polymer coating, determining the antibacterial performance arising from morphological changes is necessary. In this work, three-dimensional (3D) hierarchical polyaniline–gold (PANI/Au) hybrid nanopillars were successfully fabricated via chemical polymerization (i.e., dilute method). The morphology and structures of the PANI/Au nanopillars were controlled by the reaction time (10 min to 60 h) and the molar concentrations of the monomer (0.01, 0.1, and 1 M aniline), oxidant (0.002, 0.0067, 0.01, and 0.02 M ammonium persulfate), and acid (0.01, 0.1, 1, and 2 M perchloric acid). These complex combinations allow controlling the hierarchical micro- to nanostructure of PANI on a nanopillar array (NPA). Furthermore, the surface of the 3D PANI/Au hierarchical nanostructure can be chemically treated while maintaining the structure using initiated chemical vapor deposition. Moreover, the excellent antibacterial performance of the 3D PANI/Au hierarchical nanostructure (HNS) exceeds 99% after functional polymer coating. The excellent antibacterial performance of the obtained 3D PANI/Au HNS is mainly because of the complex topological and physicochemical surface modification. Thus, these 3D PANI/Au hierarchical nanostructures are promising high-performance antibacterial materials. View Full-Text
Keywords: hierarchical structure; polyaniline–metal hybrid; antibacterial application hierarchical structure; polyaniline–metal hybrid; antibacterial application
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MDPI and ACS Style

Kim, J.; Song, Y.; Kim, H.; Bae, N.-H.; Lee, T.J.; Park, Y.M.; Lee, S.J.; Im, S.G.; Choi, B.G.; Lee, K.G. 3D Hierarchical Polyaniline–Metal Hybrid Nanopillars: Morphological Control and Its Antibacterial Application. Nanomaterials 2021, 11, 2716. https://doi.org/10.3390/nano11102716

AMA Style

Kim J, Song Y, Kim H, Bae N-H, Lee TJ, Park YM, Lee SJ, Im SG, Choi BG, Lee KG. 3D Hierarchical Polyaniline–Metal Hybrid Nanopillars: Morphological Control and Its Antibacterial Application. Nanomaterials. 2021; 11(10):2716. https://doi.org/10.3390/nano11102716

Chicago/Turabian Style

Kim, Jueun, Younseong Song, Hogi Kim, Nam-Ho Bae, Tae J. Lee, Yoo M. Park, Seok J. Lee, Sung G. Im, Bong G. Choi, and Kyoung G. Lee 2021. "3D Hierarchical Polyaniline–Metal Hybrid Nanopillars: Morphological Control and Its Antibacterial Application" Nanomaterials 11, no. 10: 2716. https://doi.org/10.3390/nano11102716

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