Effect of roughness and nanoporosity on optical properties of black and reflective Al films prepared by magnetron sputtering

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22340%2F21%3A43923005" target="_blank" >RIV/60461373:22340/21:43923005 - isvavai.cz</a>
Alternative codes found
RIV/68378271:_____/21:00542812 RIV/00216208:11320/21:10430003 RIV/00216208:11310/21:10430003
Result on the web
<a href="https://www.sciencedirect.com/science/article/pii/S0925838821011531?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0925838821011531?via%3Dihub</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.jallcom.2021.159744" target="_blank" >10.1016/j.jallcom.2021.159744</a>

Result language
angličtina
Original language name
Effect of roughness and nanoporosity on optical properties of black and reflective Al films prepared by magnetron sputtering
Original language description
In this work, a comparison of the microstructure of black and classic reflective aluminum films is provided. The N2 concentration during the magnetron sputtering deposition has a key impact on the growth process and final moth-eye-like morphology of black Al films. The study of films with thickness ~1.5 µm and ~8 µm and fully developed microstructure enabled us to clarify the origin of different optical properties of black and reflective Al. Atomic force microscopy measurements showed high roughnesses for both types of films leading to light scattering from their surface. In the case of black Al, the incident light is absorbed in a fractal-like nanoporous surface. Less than 3% of the intensity in the wavelength range from 190 nm to 1200 nm is reflected. Positronium formation in columnar nanopores with a diameter of 4 – 5 Å was observed by positron annihilation lifetime spectroscopy. The nanoporosity rather than the roughness is the key feature of black films compared to reflective ones. © 2021 Elsevier B.V.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
—
OECD FORD branch
21001 - Nano-materials (production and properties)

Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2021
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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