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

Author(s)

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]

Affiliation

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

• Document type: Journal article
• Source: ANGEWANDTE CHEMIE-INTERNATIONAL EDITION; v. 56, n. 47, p. 15113-15117, NOV 20 2017.
• Web of Science Citations: 25

Abstract

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)

• FAPESP's process: 17/10522-5 - Development of alternative methods for fabrication of electrochemical paper-based sensors
• Grantee: Thiago Regis Longo Cesar da Paixão
• Support Opportunities: Regular Research Grants
• FAPESP's process: 16/16477-9 - Fabrication of portable paper-based analytical devices with electrochemical and colorimetric detection system aiming at forensic, clinical, and environmental applications
• Grantee: William Reis de Araujo
• Support Opportunities: Scholarships in Brazil - Post-Doctoral