Year-end Sale % OFF 
Abstract
In this work, two copper-based biometamaterials were engineered using leaves of water cabbage (Pistia stratiotes) and purple bauhinia (Phanera purpurea) as templates. The copper sputtering was implemented to produce a thin copper film on the surface of leaves. The scanning electron microscopy (SEM) images exhibited the root hair-like nanostructure of water cabbage leaf and single comb-like nanostructure of purple bauhinia leaf. In spite of copper coating, the leaf surfaces of water cabbage and purple bauhinia were black and exhibited excellent light absorption at visible and near infrarrred wavelengths. It was estimated that these two types of leaves could absorb roughly 90% of light. Finite-difference time-domain (FDTD) calculations predicted the low reflectance stemming from the leaf nanostructures and copper coating layer. Because of the low cost of copper as a coating metal and simple procedure, this can be a promising method for quick fabrication of a thin copper film on the leaf nanostructure for application in blackbody or as the light absorbers.
Highlights
In this work, two copper-based biometamaterials were engineered using leaves of water cabbage (Pistia stratiotes) and purple bauhinia (Phanera purpurea) as templates
The biometamaterials were engineered according to the following procedure: (i) The young leaves of both purple bauhinia and water cabbage were collected in the nature in Hanoi, Vietnam. (ii) After being treated with deionized water (DIW), the leaves were nipped of and fixed on a sputtering holder. (iii) A thin copper film was deposited on the leaves of the investigated plants by sputtering in argon (Ar) at a low pressure from a 99.99% copper target
It can be concluded www.nature.com/scientificreports that the black color on the leaf surface of Phanera purpurea and Pistia stratiotes was formed only with an appropriate thickness of copper film, which was found in the range of 20–100 nm
Summary
Two copper-based biometamaterials were engineered using leaves of water cabbage (Pistia stratiotes) and purple bauhinia (Phanera purpurea) as templates. In spite of copper coating, the leaf surfaces of water cabbage and purple bauhinia were black and exhibited excellent light absorption at visible and near infrarrred wavelengths. The compound eyes of moths (Cameraria ohridella) contain thousands of nanostructures on its surface, allowing them to see considerably better than human beings in dim and dark conditions[13] These patterns reveal almost perfect broadband anti-reflection properties. After being coated with copper, the leaf surfaces of water cabbage and purple bauhinia were almost black. The copper coated leaf surfaces of water cabbage and purple bauhinia exhibited reflectivity of less than 2.5% through the whole visible spectrum
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
