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Ag Electrode Strain Sensor Fabrication Using Laser Direct Writing Process
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 Title & Authors
Ag Electrode Strain Sensor Fabrication Using Laser Direct Writing Process
Kim, Hyeonseok; Shin, Jaeho; Hong, Sukjoon; Ko, Seung Hwan;
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As several innovative technologies for flexible electric devices are being realized, demand for in-situ strain monitoring for flexible electric devices is being emphasized. Because flexible devices are commonly influenced by substrate strain, suitable strain sensors for flexible devices are essential for the sophisticated maneuvering of flexible devices. In this study, a flexible strain sensor based on an Ag electrode is prepared on a polyimide substrate using the LDW (laser direct writing) process. In this process, first, the Ag nanoparticles are coated on the substrate and selectively sintered using a focused laser. Because of the advantages of the LDW process (such as being mask-less, using low temperatures, and having non-vacuum characteristics), the entire fabrication process has been dramatically simplified; as a final outcome, a highly reliable strain sensor has been fabricated. Using this strain sensor, various strain conditions that arise from different bending radii can be detected by measuring real-time electrical signals.
Strain sensor;Flexible device;Laser direct writing;Non-vacuum;Mask-less;Low temperature;Patterning;
 Cited by
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J. Yeo, S. Hong, D. Lee, N. Hotz, M.-T. Lee, C. P. Grigoropoulos, and S. H. Ko, "Next generation non-vacuum, maskless, low temperature nanoparticle ink laser digital direct metal patterning for a large area flexible electronics," PLoS ONE, Vol. 7, p. e42315, 2012. crossref(new window)

S. Hong, J. Yeo, G. Kim, D. Kim, H. Lee, J. Kwon, H. Lee, P. Lee, and S. H. Ko, "Nonvacuum, maskless fabrication of a flexible metal grid transparent conductor by low-temperature selective laser sintering of nanoparticle ink," ACS Nano, Vol. 7, pp. 5024-5031, 2013/06/25 2013. crossref(new window)

T. Yamada, Y. Hayamizu, Y. Yamamoto, Y. Yomogida, A. Izadi-Najafabadi, D. N. Futaba, and K. Hata, "A stretchable carbon nanotube strain sensor for human-motion detection," Nat Nano, Vol. 6, pp. 296-301, 2011. crossref(new window)

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