Electrochemical multi-sensors obtained by applying an electric discharge treatment to 3D-printed poly(lactic acid)

• DOI: 10.1016/j.apsusc.2022.153623
• Publication Date: 2022-05-11T16:20:43Z
• Authors: Adrián Fontana-Es...; Sonia Lanzalaco; Oscar Bertran; Carlos Alemán
• Keywords: Glucose oxidase; Inert; Surface Modification

Electrochemical sensors for real-time detection of several bioanalytes have been prepared by additive manufacturing, shaping non-conductive poly(lactic acid) (PLA) filaments, and applying a physical treatment to create excited species. The latter process, which consists the application power discharge 100 W during 2 min in chamber at low pressure O2, converts electrochemically inert PLA into an responsive material. electric caused oxidation surface as evidenced increment quantity oxygenated species detected FTIR spectroscopy X-ray photoelectron (XPS). Indeed, changes chemical composition became more pronounced with increasing O2 pressure. After demonstrating performance chemically modified material individual dopamine glucose sensors, multiplexed has achieved measuring simultaneously two voltammetric signals. This performed collecting signals different regions, naked region functionalized Glucose Oxidase. These outcomes led define new paradigm manufacturing electrodes electrochemical based on 3D printing without using conducting materials any stage process.