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Self-Oxidation Resistance of the Curved Surface of Achromatic Copper

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Title
Self-Oxidation Resistance of the Curved Surface of Achromatic Copper
Author(s)
Kim, Young-Hoon; Kim, Seong-Gon; Lee, Seunghun; Cheon, Miyeon; Kim, Su Jae; Nam, Kideuk; Lamichhane, Bipin; Park, Sung Heum; Jung, Min-Hyoung; Kim, Ji-Soo; Seo, Yu-Seong; Taewoo Ha; Hwang, Jungseek; Jeong, Hu Young; Lee, Yusil; Young Hee Lee; Young-Min Kim; Jeong, Se-Young
Publication Date
2023-10
Journal
Advanced Materials, v.35, no.42
Publisher
WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Abstract
Copyright © 1999-2023 John Wiley & Sons, Inc. All rights reserved. Copper surfaces that exhibit a wide range of achromatic colors while still metallic have not been studied, despite advancements in antireflection coatings. A series of achromatic copper films grown with [111] preferred orientation by depositing 3D porous nanostructures is introduced via coherent/incoherent atomic sputtering epitaxy. The porous copper nanostructures self-regulate the giant oxidation resistance by constructing a curved surface that generates a series of monoatomic steps, followed by shrinkage of the lattice spacing of one or two surface layers. First-principles calculations confirm that these structural components cooperatively increase the energy barrier against oxygen penetration. The achromaticity of the single-crystalline porous copper films is systematically tuned by geometrical parameters such as pore size distribution and 3D linkage. The optimized achromatic copper films with high oxidation resistance show an unusual switching effect between superhydrophilicity and superhydrophobicity. The tailored 3D porous nanostructures can be a candidate material for numerous applications, such as antireflection coatings, microfluidic devices, droplet tweezers, and reversible wettability switches.
URI
https://pr.ibs.re.kr/handle/8788114/14193
DOI
10.1002/adma.202210564
ISSN
0935-9648
Appears in Collections:
Center for Integrated Nanostructure Physics(나노구조물리 연구단) > 1. Journal Papers (저널논문)
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