Electrophoretic deposition as a new approach to produce optical sensing films adaptable to microdevices Marín-Suárez, Marta Medina Rodríguez, Santiago Ergeneman, Olgaç Pané, Salvador Fernández Sánchez, Jorge Fernando J. Nelson, Bradley Fernández Gutiérrez, Alberto We report the fabrication of optical oxygen sensor films using electrophoretic deposition (EPD) of poly(styrene-co-maleic anhydride) nanoparticles containing the oxygen-sensitive dye platinum(II) meso-tetra(pentafluorophenyl)porphine. Compared to other deposition methods, the EPD is simple and allows easy control over deposition, which is crucial for the implementation of optical sensing films in microdevices. By optimizing the synthesis of the functional nanoparticles, anodic EPD can be performed. The amount of deposited particles can be tuned by varying either the electrical potential or the deposition time. The sensing phases were characterized using a phase-modulation technique showing a Stern–Volmer constant (kSV1) between 45 and 52 bar−1 for gas and of 20.72 bar−1 in the aqueous phase without leaching of the particles from the surface. The small thickness of the layers lead to short response times (<0.4 s). This is the first time that polymeric optical sensing films have been obtained by EPD from dispersions of oxygen sensing nanoparticles. 2024-10-08T07:18:15Z 2024-10-08T07:18:15Z 2013-10-07 journal article Marín SUárez, M. et. al. Nanoscale, 2014, 6, 263. [https://doi.org/10.1039/C3NR03336H] https://hdl.handle.net/10481/95658 10.1039/C3NR03336H eng http://creativecommons.org/licenses/by-nc/4.0/ open access Atribución-NoComercial 4.0 Internacional Royal Society of Chemistry