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

Kód výsledku v 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>

Nalezeny alternativní kódy

RIV/68378271:_____/21:00542812 RIV/00216208:11320/21:10430003 RIV/00216208:11310/21:10430003

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

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

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

21001 - Nano-materials (production and properties)

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2021

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Journal of Alloys and Compounds

ISSN

0925-8388

e-ISSN

—

Svazek periodika

872

Číslo periodika v rámci svazku

15 August 2021

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

9

Strana od-do

—

Kód UT WoS článku

000652811200002

EID výsledku v databázi Scopus

2-s2.0-85103928729