Au Nanoparticles@Si Nanowire Oligomer Arrays for SERS: Dimers Are Best

Bartschmid T, Menath J, Römling L, Vogel N, Atalay F, Farhadi A, Bourret GR (2024)

Publication Type: Journal article

Publication year: 2024

Journal

ACS Applied Materials and Interfaces American Chemical Society

Book Volume: 16

Pages Range: 41379 - 41389

Journal Issue: 31

DOI: 10.1021/acsami.4c10004

Abstract

We report the synthesis of vertically aligned silicon nanowire (VA-SiNW) oligomer arrays coated with Au nanoparticle (NP) monolayers via a combination of colloidal lithography, metal-assisted chemical etching, and directed NP assembly. Arrays of SiNW monomers (i.e., isolated NWs), dimers, and tetramers are synthesized, decorated with AuNPs, and tested for their performance in surface-enhanced Raman spectroscopy. The ∼20 nm AuNPs easily enter within the ca. 40 nm gaps of the SiNW oligomers, thus reaching the hot spot region. At 785 nm excitation, the AuNPs@SiNW dimer arrays provide the highest Raman signal, in agreement with electromagnetic simulations showing a high electric field enhancement at the Au/Si interface within the dimer gap region.

Authors with CRIS profile

Lukas Römling Professur für Partikelsynthese Nicolas Vogel Lehrstuhl für Partikelsynthese (LFG)

Involved external institutions

Universität Salzburg (Paris Lodron Universität Salzburg) AT Austria (AT)

How to cite

APA:

Bartschmid, T., Menath, J., Römling, L., Vogel, N., Atalay, F., Farhadi, A., & Bourret, G.R. (2024). Au Nanoparticles@Si Nanowire Oligomer Arrays for SERS: Dimers Are Best. ACS Applied Materials and Interfaces, 16(31), 41379 - 41389. https://doi.org/10.1021/acsami.4c10004

MLA:

Bartschmid, Theresa, et al. "Au Nanoparticles@Si Nanowire Oligomer Arrays for SERS: Dimers Are Best." ACS Applied Materials and Interfaces 16.31 (2024): 41379 - 41389.

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