Abstract
In this work, a bilayer lift-off process was combined with a spray coating technique to fabricate highly flexible and transparent heaters based on silver nanowire (AgNW) microgrid (AMG) structures. The unique architecture of the bilayer polymer mold with a sufficient undercut enabled the precise, reproducible fabrication of MG made of AgNWs with a high aspect ratio. The resulting AMG exhibited well-balanced optoelectronic properties: a low sheet resistance (6 ± 0.4 Ω/sq) and a high optical transmittance (71.8 ± 3.9% at a 550 nm wavelength). The AMG heater showed an excellent electrothermal performance: a low-voltage operation (51.4 ± 2℃ at 2 V) and high thermal resistance (~ 398℃ cm2/W). The mechanically flexible heater was successfully attached to the wrist region, and its Joule heating performance could be maintained stably and uniformly, even under dynamic wrist bending motions.
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Acknowledgements
This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIT) (NRF-2018R1A2A2A05018201 and NRF-2021R1A2B5B01001421).
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Noh, JY., Kim, JM. Transparent film heater based on a microgrid-patterned metal nanowire network prepared by using the bilayer lift-off technique. J. Korean Phys. Soc. 80, 404–409 (2022). https://doi.org/10.1007/s40042-022-00431-z
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DOI: https://doi.org/10.1007/s40042-022-00431-z