Spirally Wrapped Carbon Nanotube Microelectrodes for Fiber Optoelectronic Devices beyond Geometrical Limitations toward Smart Wearable E-Textile Applications
| Autor: | Hyemi Han, Hyunjung Yi, Jung Ah Lim, Hyoungjun Kim, Min-Chul Park, Seung-Ho Paik, Jongtae Ahn, Tae-Hyung Kang, Soo Jin Kim, Do Kyung Hwang, Seongjin Park |
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| Rok vydání: | 2020 |
| Předmět: |
Materials science
business.product_category business.industry Transistor General Engineering General Physics and Astronomy 02 engineering and technology Carbon nanotube 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Photodiode law.invention Organic semiconductor Microelectrode law Electrode Microfiber Optoelectronics General Materials Science Fiber 0210 nano-technology business |
| Zdroj: | ACS nano. 14(12) |
| ISSN: | 1936-086X |
| Popis: | Fiber optoelectronics technology has recently attracted attention as enabling various form factors of wearable electronics, and the issue of how to control and optimize the configuration and physical properties of the electrode micropatterns in the microfiber devices has become important. Here, spirally wrapped carbon nanotube (CNT) microelectrodes with a controlled dimension are demonstrated for high-performance fiber optoelectronic devices. Inkjet-printed CNT microelectrodes with the desired dimension on an agarose hydrogel template are rolling-transferred onto a microfiber surface with an efficient electrical interface. A fiber organic field-effect transistor with spirally wrapped CNT microelectrodes verifies the feasibility of this strategy, where the transferred microelectrodes intimately contact the organic semiconductor active layer and the output current characteristics are simply controlled, resulting in characteristics that exceed the previous structural limitations. Furthermore, a fiber organic photodiode with spirally wrapped CNT microelectrodes, when used as a transparent electrode, exhibits a high Ilight/Idark ratio and good durability of bending. This fiber photodiode can be successfully incorporated into a textile photoplethysmography bandage for the real-time monitoring of human vital signals. This work offers a promising and efficient strategy to overcome the geometric factors limiting the performance of fiber-optic optoelectronic devices. |
| Databáze: | OpenAIRE |
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