Exploiting Micrometer-Scale Replication of Fungal Biotemplates for Multifunctional Uses in Electrochemistry and SERS Substrates

Verônica B Maciel; Adriana M Fontes; Regina Geris; Zênis N da Rocha; Jéssica G S Ramalho; Antonio F da Silva; Gabriel C da Silva; Abdelhafed Taleb; Souad Ammar; Marcos Malta

doi:10.1021/acsomega.4c03431

Exploiting Micrometer-Scale Replication of Fungal Biotemplates for Multifunctional Uses in Electrochemistry and SERS Substrates

ACS Omega. 2024 Oct 17;9(43):43385-43394. doi: 10.1021/acsomega.4c03431. eCollection 2024 Oct 29.

Authors

Affiliations

¹ Institute of Chemistry, Federal University of Bahia, Campus Ondina, Salvador, BA 40110-060, Brazil.
² Federal Institute of Bahia, Campus Camaçari, Salvador, BA 40110-060, Brazil.
³ Institute of Physics, Federal University of Bahia, Campus Ondina, Salvador, BA 40110-060, Brazil.
⁴ Institute of Health Sciences, Federal University of Bahia, Campus Canela, Salvador, BA 40110-060, Brazil.
⁵ Department of Chemistry, Federal University of Viçosa, Viçosa, MG 36570-900, Brazil.
⁶ Sorbonne Université, 4, place Jussieu, Paris 75321, France.
⁷ Laboratory of Interfaces, Treatment, Organization and Dynamics of Surfaces (ITODYS), CNRS, University of Paris Cité, Paris 75005, France.

Abstract

In this paper, filamentous fungi have been used as biotemplates to integrate gold nanoparticles (Au-NPs) into the cell wall. A new chemical mechanism has been proposed to elucidate the assimilation of Au-NPs by fungi, considering the ionic current that arises in the function of fungal metabolism. After biological components were eliminated, mycelium-like gold microtubes have been obtained using different fungal species as precursors. Mycelium-like gold microtubes replicate the biological shape of fungi, presenting inherent multifunctionality. This work presents two promising applications for this material: high surface area electrodes for electrochemical experiments and substrates for SERS detection of organic molecules such as Rhodamine 6G.