Premium
Single‐Step Reagentless Laser Scribing Fabrication of Electrochemical Paper‐Based Analytical Devices
Author(s) -
de Araujo William R.,
Frasson Carolina M. R.,
Ameku Wilson A.,
Silva José R.,
Angnes Lúcio,
Paixão Thiago R. L. C.
Publication year - 2017
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201708527
Subject(s) - materials science , fabrication , nanotechnology , electrode , laser , electrochemistry , carbon nanotube , optics , medicine , chemistry , alternative medicine , physics , pathology
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 CO 2 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.