Uniform arrays of gold nanoelectrodes with tuneable recess depth

Elena O Gordeeva; Ilya V Roslyakov; Alexey P Leontiev; Alexey A Klimenko; Kirill S Napolskii

doi:10.3762/bjnano.12.72

Uniform arrays of gold nanoelectrodes with tuneable recess depth

Beilstein J Nanotechnol. 2021 Aug 30:12:957-964. doi: 10.3762/bjnano.12.72. eCollection 2021.

Authors

Elena O Gordeeva¹, Ilya V Roslyakov^{1

2}, Alexey P Leontiev¹, Alexey A Klimenko^{1

3}, Kirill S Napolskii^{1

4}

Affiliations

¹ Lomonosov Moscow State University, Leninskie Gory, Moscow 199991, Russia.
² Kurnakov Institute of General and Inorganic Chemistry RAS, Leninsky av., Moscow 119991, Russia.
³ Institute of Nanotechnology of Microelectronics RAS, Leninsky av., Moscow 115487, Russia.
⁴ Moscow Institute of Physics and Technology, Institutskiy per., Dolgoprudny 141701, Russia.

Abstract

Nanoelectrode arrays are much in demand in electroanalytical chemistry, electrocatalysis, and bioelectrochemistry. One of the promising approaches for the preparation of such systems is templated electrodeposition. In the present study, porous anodic alumina templates are used to prepare Au nanoelectrode arrays. Multistage electrodeposition is proposed for the formation of recessed electrodes with the ability to tune the distance between the surface of the porous template and the top surface of the nanoelectrodes. A set of complementary techniques, including chronoamperometry, coulometry, and scanning electron microscopy, are used to characterize the nanoelectrode arrays. The number of active nanoelectrodes is experimentally measured. The pathways to further improve the recessed nanoelectrode arrays based on anodic alumina templates are discussed.

Keywords: anodic alumina; gold; nanoelectrode array; recessed electrode; templated electrodeposition.

Grants and funding

The work was supported by the Russian Science Foundation (Grant No. 19-73-10176) in part of preparation and characterization of the AAO porous films. Templated electrodeposition of metal nanowires was performed with financial support provided by the Council for Grants of the President of the Russian Federation in the frames of agreement No. 075-15-2020-264 (МК-1959.2020.3).