Improving Aluminum Ultraviolet Plasmonic Activity through a 1 nm ta-C Film

Aluminum (Al) can actively support plasmonic response in the ultraviolet (UV) range compared to noble metals (e.g., Au, Ag) and thus has broad applications including UV sensing, displays, and photovoltaics. High-quality Al films with no oxidation are essential and critical in these applications. However, Al is very prone to fast oxidation in air, which critically depends on the fabrication process. Here, we report that by leveraging the in situ sputter etching and sputter deposition of a 1 nm tetrahedral amorphous carbon (ta-C) film on the Al nanostructures, Al plasmonic activity can be improved. The prior sputter etching process greatly reduces the oxidized layer of the Al films, and the subsequent sputter deposition of ta-C keeps Al oxidation-free. The ta-C film outperforms the naturally passivated Al2O3 layer on the Al film because the ta-C film has a denser structure, higher permittivity, and better biocompatibility. Therefore, it can effectively improve the plasmonic response of Al and be beneficial to molecule sensing, which is proved in our experiments and is also verified in simulations. Our results can enable the various applications based on plasmon resonance in the UV range.

Medienart:

E-Artikel

Erscheinungsjahr:

2021

Erschienen:

2021

Enthalten in:

Zur Gesamtaufnahme - volume:13

Enthalten in:

ACS applied materials & interfaces - 13(2021), 6 vom: 17. Feb., Seite 7672-7679

Sprache:

Englisch

Beteiligte Personen:

Wang, Jie [VerfasserIn]
Wu, Zhenqiu [VerfasserIn]
Wei, Junhan [VerfasserIn]
Hu, Junzheng [VerfasserIn]
Yu, Huikang [VerfasserIn]
Su, Guangxu [VerfasserIn]
Hu, Lumang [VerfasserIn]
Yan, Xiaodong [VerfasserIn]
Zhan, Peng [VerfasserIn]
Liu, Fanxin [VerfasserIn]

Links:

Volltext

Themen:

Al plasmons
Journal Article
Molecule sensing
Oxidation-free
Ta-C film
UV range

Anmerkungen:

Date Revised 17.02.2021

published: Print-Electronic

Citation Status PubMed-not-MEDLINE

doi:

10.1021/acsami.0c18473

funding:

Förderinstitution / Projekttitel:

PPN (Katalog-ID):

NLM320736512