Department of Fundamental Chemistry, Institute of Chemistry, University of São Paulo, Av. Prof. Lineu Prestes, 748, 05508-000, São Paulo, SP, Brazil.
Angew Chem Int Ed Engl. 2017 Nov 20;56(47):15113-15117. doi: 10.1002/anie.201708527. Epub 2017 Oct 23.
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 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.
采用一步激光刻蚀工艺在纸质器件上制作纳米结构电极。这种简单且低成本的技术消除了对化学试剂或受控条件的需求。该工艺涉及使用 CO 激光使纸板表面热解，产生由石墨烯片和与铝硅酸盐纳米颗粒复合的导电多孔非石墨化碳材料。对新型电极材料进行了广泛的表征，结果表明其具有高导电性和增强的活性/几何面积比，非常适合电化学应用。作为概念验证，该器件成功用于临床、制药、食品和法医领域的不同分析应用。与新材料特性相关的可扩展和绿色制造方法非常有希望用于开发便携式电化学器件。
