An iridescent film of porous anodic aluminum oxide with alternatingly electrodeposited Cu and SiO₂ nanoparticles

• Menglei Chang,
• Huawen Hu,
• Haiyan Quan,
• Hongyang Wei,
• Zhangyi Xiong,
• Jiacong Lu,
• Pin Luo,
• Yaoheng Liang,
• Jianzhen Ou and
• Dongchu Chen

Beilstein J. Nanotechnol. 2019, 10, 735–745, doi:10.3762/bjnano.10.73

• of the fabrication of an iridescent film of porous AAO on an industrial aluminum alloy substrate, with alternatingly electrodeposited Cu and SiO2 nanoparticles (NPs). A rainbow effect was effectively obtained for the optimized sample with appropriate alternating electrodeposition times. The structure

• film that exhibited a rainbow effect and superior anti-corrosion performance. Keywords: aluminum alloys; anodic aluminum oxidation; interference-enabled color production; rainbow effect; structural color; Introduction Due to the low cost, high mechanical strength and ductility, and well-developed

• complementary light waves. Structural colors do not absorb light, implying that the light intensity will not decrease, and significantly, a local iridescent phenomenon appears as a result of light diffraction and reflection. This rainbow effect of structural colors refers to that different colors are displayed