(Invited) All-3D-Printed Devices for Electrochemical Sensing

Abstract

Three-dimensional (3D) printing has gained significant attention in research laboratories, since it provides the end user with the freedom and ability to produce in-house and on-demand specific electrochemical platforms in a fast and affordable way. The most applied 3D-printing technology in the manufacturing of electrochemical sensors is fused deposition modeling (FDM) which is based on the e-printing of the device by thermoplastic filaments. In particular, the use of FDM for the printing of sensors offers noteworthy advantages compared to conventional fabrication technologies, such as desktop-sized equipment, very low capital, operational, and materials costs, easy fabrication process, design transferability (as the respective file format can be transferred through e-mail and printed on every dual extruder 3D printer), and ecofriendliness (since no waste is produced) [1,2].This presentation will discuss our recent developments of all-3D-printed integrated mini devices and their applications to electrochemical sensing [3-6]. The devices are printed from specific filaments (conductive and non-conductive) at different sizes and shapes, by a dual extruder 3D-printer, in order to fit to the demands of numerous applications. More specifically, all-3D-printed electrochemical microtitration wells for the in-situ and micro-volume quantum dot-based bioassays, as well as a 3D-printed wearable glucose monitoring device in the form of an electrochemical ring will be described. Besides, a 3D-printed wearable device in the form of an electrochemical finger for date rape drugs screening and a 3D-printed microfluidic device modified with metallic film for the trace determination of heavy metals will be presented.Acknowledgements:I thank the Special Account for Research Grants of National and Kapodistrian University of Athens for the financial support.References A. Abdalla and B. A. Patel, Curr. Opin. Electrochem., 20 (2020) 78–81.E. J. Carrasco-Correa, E. F. Simó-Alfonso, J. M. Herrero-Martínez, M. Miró, TrAC - Trends Anal. Chem., 136 (2021) 116177.A Baltima, H. Panagopoulou, A. Economou, C. Kokkinos, Anal. Chim. Acta 1159 (2021) 338426.V. Katseli, M. Angelopoulou, C. Kokkinos, Adv. Funct. Mater., 31 (2021) 2102459.V. Katseli, A. Economou, C. Kokkinos, Anal. Chem. 93 (2021) 3331−3336.G. Poulladofonou, C. Freris, A. Economou, C. Kokkinos, Anal. Chem. 94 (2022) 4087−4094.