Microfluidic Electronic Tongues Based on High-Entropy Nitride Films

Autor(es)

Leidens, Leonardo M. ; Boeira, Carla D. ; Goncalves, Maria H. ; Costa, Endel E. C. ; Marchi, Maria C. ; Zanatta, Antonio R. ; Alvarez, Fernando ; Riul Jr, Antonio

• Tipo de documento: Artigo Científico
• Fonte: ACS APPLIED ELECTRONIC MATERIALS; v. 7, n. 12, p. 12-pg., 2025-06-05.

Resumo

High-entropy nitrides (HENs) are emerging as promising materials for sensing applications due to their exceptional chemical stability, diverse electrical properties, and highly tunable surface and bulk characteristics. This study integrates HEN thin films, deposited via RF sputtering, into an impedimetric microfluidic electronic tongue (e-tongue), designed to assess their potential for high sensitivity and robust detection of various analytes. The active films displayed a distinct oxide-rich surface and nitride-rich sublayer, directly influencing sensor performance. As a proof-of-concept, the unique electrical response of the HEN-based e-tongue enabled precise discrimination between similar ions (Na+ and K+) and basic human tastes (sweet, salty, bitter, umami, and sour) at concentrations near or below the human palatability threshold. Moreover, after repeated use, the films maintained their chemical and structural integrity, ensuring long-term stability and reproducibility. These results highlight the potential of HENs as versatile materials for advanced sensing applications, demonstrating their promise for next-generation e-tongue systems and expanding the range of applications for this class of materials. (AU)

• Processo FAPESP: 19/18460-4 - Desenvolvimento e propriedades termomecânicas e tribológicas de materiais multicomponentes avançados de alta entropia
• Beneficiário: Fernando Alvarez
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 22/08216-1 - Desenvolvimento de dispositivos de sensoriamento avançados para análise de solos utilizando nanomateriais: "Língua Eletrônica Microfluídica"
• Beneficiário: Carla Daniela Boeira
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado
• Processo FAPESP: 23/07552-0 - Nova rota de síntese para MXenes: adicionando multifuncionalidades a interfaces e dispositivos
• Beneficiário: Leonardo Mathias Leidens
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado