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Open AccessFeature PaperArticle

Single Step Laser Transfer and Laser Curing of Ag NanoWires: A Digital Process for the Fabrication of Flexible and Transparent Microelectrodes

1
Physics Department, Zografou Campus, National Technical University of Athens, Athens 15780, Greece
2
Campus 1, School of Engineering, University of West Attica, Aigaleo 12243, Greece
*
Author to whom correspondence should be addressed.
Materials 2018, 11(6), 1036; https://doi.org/10.3390/ma11061036
Received: 2 May 2018 / Revised: 4 June 2018 / Accepted: 16 June 2018 / Published: 19 June 2018
(This article belongs to the Special Issue Selective Laser Sintering (SLS) of Materials)
Ag nanowire (NW) networks have exquisite optical and electrical properties which make them ideal candidate materials for flexible transparent conductive electrodes. Despite the compatibility of Ag NW networks with laser processing, few demonstrations of laser fabricated Ag NW based components currently exist. In this work, we report on a novel single step laser transferring and laser curing process of micrometer sized pixels of Ag NW networks on flexible substrates. This process relies on the selective laser heating of the Ag NWs induced by the laser pulse energy and the subsequent localized melting of the polymeric substrate. We demonstrate that a single laser pulse can induce both transfer and curing of the Ag NW network. The feasibility of the process is confirmed experimentally and validated by Finite Element Analysis simulations, which indicate that selective heating is carried out within a submicron-sized heat affected zone. The resulting structures can be utilized as fully functional flexible transparent electrodes with figures of merit even higher than 100. Low sheet resistance (<50 Ohm/sq) and high visible light transparency (>90%) make the reported process highly desirable for a variety of applications, including selective heating or annealing of nanocomposite materials and laser processing of nanostructured materials on a large variety of optically transparent substrates, such as Polydimethylsiloxane (PDMS). View Full-Text
Keywords: laser curing; laser transfer; silver nanowires; flexible transparent conductive electrodes; heat affected zone; selective heating laser curing; laser transfer; silver nanowires; flexible transparent conductive electrodes; heat affected zone; selective heating
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MDPI and ACS Style

Zacharatos, F.; Karvounis, P.; Theodorakos, I.; Hatziapostolou, A.; Zergioti, I. Single Step Laser Transfer and Laser Curing of Ag NanoWires: A Digital Process for the Fabrication of Flexible and Transparent Microelectrodes. Materials 2018, 11, 1036.

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