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    Ferrocene pixels by laser-induced forward transfer: towards flexible microelectrode printing

    Year: 2017

    Journal: J. Phys. D-Appl. Phys., Volume 50, nov-22

    Authors: Mitu, B.; Matei, A.; Filipescu, M.; Papavlu, A. Palla; Bercea, A.; Lippert, T.; Dinescu, M.

    Organizations: National Program [4N/2016]; Romanian National Authority for Scientific Research and Innovation, CNCS-UEFISCDI [PN-II-PT-PCCA-2011-3.2-0394, PCCA 17/2012, PN-II-RU-TE-2014-4-0976, TE 270/2015, PN-II-RU-TE-2014-4-2311, TE 25/2015]

    Keywords: ferrocene; thin films; matrix-assisted pulsed laser evaporation; laser-induced forward transfer

    The aim of this work is to demonstrate the potential of laser-induced forward transfer (LIFT) as a printing technology, alternative to standard microfabrication techniques, in the area of flexible micro-electrode fabrication. First, ferrocene thin films are deposited onto fused silica and fused silica substrates previously coated with a photodegradable polymer film (triazene polymer) by matrix assisted pulsed laser evaporation (MAPLE). The morphology and chemical structure of the ferrocene thin films deposited by MAPLE has been investigated by atomic force microscopy and Fourier transformed infrared spectroscopy, and no structural damage occurs as a result of the laser deposition. Second, LIFT is applied to print for the first time ferrocene pixels and lines onto flexible polydimethylsiloxane (PDMS) substrates. The ferrocene pixels and lines are flawlessly transferred onto the PDMS substrates in air at room temperature, without the need of additional conventional photolithography processes. We believe that these results are very promising for a variety of applications ranging from flexible electronics to lab-on-a-chip devices, MEMS, and medical implants.
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