Gold nanoflowers grown in a porous Si/SiO2 matrix: The fabrication process and plasmonic properties

Osminkina LA, Zukovskaja O, Agafilushkina SN, Kaniukov E, Stranik O, Gonchar KA, Yakimchuk D, Bundyukova V, Chermoshentsev DA, Dyakov SA, Gippius NA, Weber K, Popp J, Cialla-May D, Sivakov V (2020)

Publication Type: Journal article

Publication year: 2020

Journal

Applied Surface Science Elsevier

Book Volume: 507

Article Number: 144989

DOI: 10.1016/j.apsusc.2019.144989

Abstract

Highly branched metal nanostructures are of great interest for creating highly sensitive sensors of various molecules through the use of surface-enhanced Raman scattering. However, the method of manufacturing such nanostructures is often complex and difficult to reproduce. Herein, we report a simple, one-pot synthesis of flower-like gold nanostructures (AuNFs) in a porous Si/SiO2 matrix for potential surface enhanced Raman spectroscopy (SERS) applications. Templates covered with 500-nm diameter AuNFs with rough coral-like petals were obtained through a simple electroless reduction of gold(III) chloride salt in diluted hydrofluoric acid inside pores in the Si/SiO2 layer, which were obtained by swift heavy ion track technology. Detailed SERS analysis showed that single nanoflowers are capable of enhancing Raman signals and can be used as independent nanosensors. Having a few AuNFs in close proximity to each other enables more “hot spots” to be formed with an even greater increase in signal intensity. Using such substrates, reliable detection of 4-mercaptopyridine could be achieved down to 0.01 µM concentration. Finally, we theoretically demonstrate that the AuNFs are characterized by a wide-band plasmonic mode as well as by hot spots in the electromagnetic near-field distribution, which can result in a high enhancement factor for Raman scattering.

Involved external institutions

Leibniz-Institut für Photonische Technologien e.V. DE Germany (DE) Lomonosov Moscow State University / Московский государственный университет имени М.В.Ломоносова RU Russian Federation (RU) Skolkovo Institute of Science and Technology RU Russian Federation (RU)

How to cite

APA:

Osminkina, L.A., Zukovskaja, O., Agafilushkina, S.N., Kaniukov, E., Stranik, O., Gonchar, K.A.,... Sivakov, V. (2020). Gold nanoflowers grown in a porous Si/SiO2 matrix: The fabrication process and plasmonic properties. Applied Surface Science, 507. https://doi.org/10.1016/j.apsusc.2019.144989

MLA:

Osminkina, Liubov A., et al. "Gold nanoflowers grown in a porous Si/SiO2 matrix: The fabrication process and plasmonic properties." Applied Surface Science 507 (2020).

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