Научная статья на тему 'Laser-induced deposition of topologically controlled nanometal surfaces for sensing and electrochemistry '

Laser-induced deposition of topologically controlled nanometal surfaces for sensing and electrochemistry Текст научной статьи по специальности «Нанотехнологии»

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Текст научной работы на тему «Laser-induced deposition of topologically controlled nanometal surfaces for sensing and electrochemistry »

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LASER DIAGNOSTICS AND SPECTROSCOPY

Laser-induced deposition of topologically controlled nanometal surfaces for

sensing and electrochemistry

Anna Vasileva1, Gulia Bikbaeva1, Daria Mamonova1, Ilya Kolesnikov2, Dmitry Pankin2, and Alina Manshina1,*

1 Institute of Chemistry, St. Petersburg State University, St. Petersburg 198504, Russia 2 Center for Optical and Laser Materials Research, St. Petersburg State University, St. Petersburg, Russia

*e-mail: a.manshina@spbu.ru

We found that synthesis in laser light (or laser-induced deposition LID) is efficient and easy-to-realize approach allowing creation of nanostructures with controlled chemical composition, morphology and spatial distribution [1,2,3]. The peculiarity of the LID process is the formation of metal nanophase directly on the substrate thus allowing combining synthesis of nanoparticles (NPs) and their immobilization on the surface in a single-step procedure. The significant advantage of LID is connected with the following features (i) spatial localization of the process in the laser-affected area; (ii) no destructive effects of mild laser irradiation, as a result no decomposition of deposits or substrate; (iii) precise control of composition, structure, and morphology of nanostructures that all together provides fine-tuning of deposits functionality; and (iv) process's sensitivity to laser intensity that allows deposition of topologically controlled NPs in structured laser beams. As a bright demonstration of LID potency, we present 3D electrodes that are nanoporous anodic aluminum oxide (AAO) with mono- and multimetallic nanoparticles deposited inside of the nanoscale pores with high aspect ratio (Figure 1). The obtained 3D electrodes were found to be efficient in electrochemical reactions of glucose oxidation and as glucose sensors (mouse blood plasma as analyte). Another example of LID capacity is creation of periodic arrays of plasmonic nanoparticles with high SERS efficiency and ultralow detection limit of 10-11M.

Figure 1. Laser-induced deposition on 3D templates: (a) pure AAO template; (b) PtAg@C NPs on AAO; (c) PtAg@C NPs on AAO modified with silanization; (d) PtAg@C NPs on AAO modified with silanization — cross-section view; (e) silver distribution on sample, inset — EDX data across the line.

This work was supported by RFBR project 20-58-12015. Authors are grateful to "Centre for Optical and Laser materials research", ''Centre for X-ray Diffraction Studies'' and ''Interdisciplinary Resource Centre for Nanotechnology'' Research Park of Saint Petersburg State University for technical support.

[1]A. Vasileva, S. Haschke, V MikhailovskiiA. Gitlina, J. Bachmann,A. Manshina Nano-Structures & Nano-Objects 24, 100547 (2020).

[2]. D. V. Mamonova, A. A. Vasileva, Y. V. Petrov, A. V. Koroleva, D. V Danilov, I. E. Kolesnikov, G. I. Bikbaeva,, J. Bachmann, and A. A. Manshina, Nanomaterials 12(1), (2022)

[3] D.V Mamonova, A.A.Vasileva, Y.V.Petrov, ... J.Bachmann, A.A.Manshina, Materials, 14(1), p. 1-14, (2021)

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