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    Facile Modification of Flexible Electrodes via Laser Transfer

    Year: 2022

    Journal: Materials, Volume 15, APR

    Authors: Andrei, Florin; Boerasu, Iulian; Filipescu, Mihaela; Palla-Papavlu, Alexandra

    Organizations: Ministry of Education and Research, CNCS-UEFISCDI within PNCDI III [PN-III-P1-1.1-TE-2016-1417]; Romanian National Nucleus Program; Ministry of Research, Innovation and Digitalization through Program I-Development of the National R & D System, Subprogram 1.2-Institutional Performance-Projects for Excellence Financing in RDI [13PFE/2021]

    Keywords: SnO2; Pd-SnO2; laser transfer; LIFT; electrodes; acetylacetonates

    In this work, we report the modification of commercially available electrochemical electrodes with tin oxide (SnO2) and Pd doped SnO2 (Pd-SnO2) via pulsed laser-induced forward transfer (LIFT). The pulsed light irradiation working as in situ pulsed photo-thermal treatment allows for the transfer of SnO2 and Pd-SnO2 from UV absorbing metal complex precursors onto flexible, commercially available screen-printed electrodes. The laser transfer conditions are optimized and the material transferred under different conditions is evaluated morphologically and chemically, and its functionality is tested against the detection of copper ions. For example, by applying laser fluences in the range 100-250 mJ/cm(2), the shape and the size of the transferred features ranges from nano-polyhedrons to near corner-grown cubic Pd-SnO2 or near cubic Pd-SnO2. In addition, the EDX analysis is consistent with the XPS findings, i.e., following laser transfer, Pd amounts lower than 0.5% are present in the Pd-SnO2 pixels. First sensing tests were carried out and the transferred Pd-SnO2 proved to enhance the cathodic peak when exposed to Cu(II) ions. This photo-initiated fabrication technology opens a promising way for the low-cost and high-throughput manufacturing of metal oxides as well as for electrodes for heavy metal ion detection.
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