Evaluation of Ni-Based Flexible Resistance Temperature Detectors Fabricated by Laser Digital Pattering
- Authors
- Nam, V.B.; Lee, Daeho
- Issue Date
- Mar-2021
- Publisher
- MDPI
- Keywords
- Flexible resistance temperature detector; Laser digital patterning; Laser-induced reductive sintering; Ni electrodes; NiOx nanoparticle ink
- Citation
- Nanomaterials, v.11, no.3
- Journal Title
- Nanomaterials
- Volume
- 11
- Number
- 3
- URI
- https://scholarworks.bwise.kr/gachon/handle/2020.sw.gachon/80552
- DOI
- 10.3390/nano11030576
- ISSN
- 2079-4991
- Abstract
- Temperature sensors are ubiquitous in every field of engineering application since temperature control is vital in operating, testing and monitoring various equipment systems. Herein, we introduce a facile and rapid laser digital patterning (LDP) process to fabricate low-cost, Ni-based flexible resistance temperature detectors (RTDs). Ni-based RTDs are directly generated on a thin flexible polyimide substrate (thickness: 50 µm) by laser-induced reductive sintering of a solution-processed nonstoichiometric nickel oxide (NiOx) nanoparticle thin film under ambient conditions. The shape of RTDs can be easily adjusted by controlling computer-aided design (CAD) data without using the physical patterning mask while the sensitivity (temperature coefficient of resistance (α) ~ 3.52 × 10−3 °C−1) of the sensors can be maintained regardless of shape and size of the sensor elec-trodes. The flexible Ni-based RTDs can operate over a wide temperature range up to 200 °C with excellent repeatability. Additionally, the Ni-based RTDs respond quickly to the temperature change and can operate in corrosive environments including water and seawater. Moreover, the Ni-based RTDs show a superior mechanical and electrical stability with a negligible resistance change up to a radius of curvature of 1.75 mm. Finally, a tape-pull test demonstrates the robust adhesion of Ni-based RTDs on the substrate. © 2021 by the author. Licensee MDPI, Basel, Switzerland.
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