SiM20 Posters

Sensors in Medicine 2020 32 Laser-induced porous carbon nanofibers interdigitated electrode array (LCNFs-IDEA): Fabrication and Electrochemical Characterization of a High Performing Novel Transducer Antonia Perju, Antje J. Baeumner and Nongnoot Wongkaew Institute of Analytical Chemistry, Chemo- and Biosensors, University of Regensburg, 93053 Regensburg Antonia-Teodora.Perju@chemie.uni-regensburg.de Concept Assembled devices & electrode setup Motivation Morphology of LCNFs-IDEA Fabrication of polyimide (PI) nanofibers by electrospinning Fabrication of LCNFs-IDEA Laser- induced carbonization of IDEA LCNFs Wax PI nanofibers Contact pad (G) (C) K 4 [Fe(CN) 6 ] G C G Re Ox Re Ox Re Ox Ox Re Re Ox 3D LCNFs-IDEA  0.5 €/device Free-standing 3D LCNFs-IDEA • Expansion of finger width after laser carbonization enables the decrease of the gap size beyond the resolution of the laser scriber • Gap sizes of 40 µm can reproducibly be fabricated Electrochemical characterization Re Ox Re Ox Re Ox Ox Single mode Re Ox Re Ox Ox G G Re Ox Ox G Re Ox Re Re Ox Re Ox Ox Dual mode G C Reference electrode Counter electrode 200 µm 60 µm Electrochemical sensors are simple, sensitive, portable and efficient 3D porous carbon nanomaterials are ideal transducer materials Offers various possibilities for amplification strategies Back side Front side Challenges Robust 3D nanostructures withstanding normal assay handling and cleaning procedures Possibility for integration into microfluidic or lab-on-a-chip systems Inexpensive and easy fabrication methods needed, also for mass production