Single-Step Reagentless Laser Scribing Fabrication of Electrochemical Paper-Based Analytical Devices

Autor(es)

de Araujo, William R. ^[1] ; Frasson, Carolina M. R. ^[1] ; Ameku, Wilson A. ^[1] ; Silva, Jose R. ^[1] ; Angnes, Lucio ^[1] ; Paixao, Thiago R. L. C. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Inst Chem, Dept Fundamental Chem, Av Prof Lineu Prestes 748, BR-05508000 Sao Paulo, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: ANGEWANDTE CHEMIE-INTERNATIONAL EDITION; v. 56, n. 47, p. 15113-15117, NOV 20 2017.
• Citações Web of Science: 25

Resumo

A single-step laser scribing process is used to pattern nanostructured electrodes on paper-based devices. The facile and low-cost technique eliminates the need for chemical reagents or controlled conditions. This process involves the use of a CO2 laser to pyrolyze the surface of the paperboard, producing a conductive porous non-graphitizing carbon material composed of graphene sheets and composites with aluminosilicate nanoparticles. The new electrode material was extensively characterized, and it exhibits high conductivity and an enhanced active/geometric area ratio; it is thus well-suited for electrochemical purposes. As a proof-of-concept, the devices were successfully employed for different analytical applications in the clinical, pharmaceutical, food, and forensic fields. The scalable and green fabrication method associated with the features of the new material is highly promising for the development of portable electrochemical devices. (AU)

• Processo FAPESP: 17/10522-5 - Desenvolvimento de métodos alternativos para fabricação de sensores eletroquímicos em papel
• Beneficiário: Thiago Regis Longo Cesar da Paixão
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 16/16477-9 - Fabricação de dispositivos analíticos portáteis baseados em plataformas de papel com sistema de detecção eletroquímica e colorimétrica visando aplicações forenses, clínicas e ambientais
• Beneficiário: William Reis de Araujo
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado