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

Result code in 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>
Result on the web
<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>

Result language
angličtina
Original language name
Characterization and formation mechanism of black Au films deposited under varied Ar gas pressures
Original language description
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.
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
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OECD FORD branch
20500 - Materials engineering

Project
<a href="/en/project/8F21008" target="_blank" >8F21008: Black metals decorated with surface receptors as high-potentiality materials for gas sensing</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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