Characterization and formation mechanism of black Au films deposited under varied Ar gas pressures

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22340%2F25%3A43933226" target="_blank" >RIV/60461373:22340/25:43933226 - isvavai.cz</a>

Výsledek na webu

<a href="https://link.springer.com/article/10.1007/s43939-025-00324-5" target="_blank" >https://link.springer.com/article/10.1007/s43939-025-00324-5</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/s43939-025-00324-5" target="_blank" >10.1007/s43939-025-00324-5</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Characterization and formation mechanism of black Au films deposited under varied Ar gas pressures

Popis výsledku v původním jazyce

Nanoporous black Au (B-Au) films were fabricated under varied Ar gas pressures (2, 60, and 100 Pa) via thermal evaporation. Film structures and properties were assessed with a consistent Au atom quantity of approximately 1.6 x 10-2 mol m-2. Irrespective of the deposition pressure, all samples displayed a black appearance devoid of metallic luster, resulting in almost zero specular and diffuse reflections. The highest optical absorption, reaching 99.8%, occurred at 2 Pa deposition pressure. The film density decreased notably with increasing pressure, enabling the creation of films with a density below 1.0 g/cm3-equivalent to 5% of the filling factor of bulk Au-by carefully controlling the deposition pressure. FESEM observation and XRD analyses revealed gas-phase metal particle formation in the preparation of B-Au films, similar to our previous study on B-Ag films. In addition, when deposited on a quartz crystal microbalance (QCM), the B-Au film exhibited enhanced response of the QCM sensor to ethanol vapor. The applicability of this technology to gas sensors has been confirmed.

Název v anglickém jazyce

Characterization and formation mechanism of black Au films deposited under varied Ar gas pressures

Popis výsledku anglicky

Nanoporous black Au (B-Au) films were fabricated under varied Ar gas pressures (2, 60, and 100 Pa) via thermal evaporation. Film structures and properties were assessed with a consistent Au atom quantity of approximately 1.6 x 10-2 mol m-2. Irrespective of the deposition pressure, all samples displayed a black appearance devoid of metallic luster, resulting in almost zero specular and diffuse reflections. The highest optical absorption, reaching 99.8%, occurred at 2 Pa deposition pressure. The film density decreased notably with increasing pressure, enabling the creation of films with a density below 1.0 g/cm3-equivalent to 5% of the filling factor of bulk Au-by carefully controlling the deposition pressure. FESEM observation and XRD analyses revealed gas-phase metal particle formation in the preparation of B-Au films, similar to our previous study on B-Ag films. In addition, when deposited on a quartz crystal microbalance (QCM), the B-Au film exhibited enhanced response of the QCM sensor to ethanol vapor. The applicability of this technology to gas sensors has been confirmed.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20500 - Materials engineering

Projekt

<a href="/cs/project/8F21008" target="_blank" >8F21008: Black metals decorated with surface receptors as high-potentiality materials for gas sensing</a><br>

Návaznosti

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

Rok uplatnění

2025

Kód důvěrnosti údajů

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

Název periodika

Discover Materials

ISSN

2730-7727

e-ISSN

2730-7727

Svazek periodika

5

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

CH - Švýcarská konfederace

Počet stran výsledku

13

Strana od-do

nestránkováno

Kód UT WoS článku

001526872600001

EID výsledku v databázi Scopus

2-s2.0-105010448950