Kim, Hyoungjun Kang, Tae-Hyung Ahn, Jongtae Han, Hyemi Park, Seongjin Kim, Soo Jin Park, Min-Chul Paik, Seung-Ho Hwang, Do Kyung Yi, Hyunjung Lim, Jung Ah 2024-01-19T16:00:47Z 2024-01-19T16:00:47Z 2021-09-02 2020-12 1936-0851 https://pubs.kist.re.kr/handle/201004/117669 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. English AMER CHEMICAL SOC Spirally Wrapped Carbon Nanotube Microelectrodes for Fiber Optoelectronic Devices beyond Geometrical Limitations toward Smart Wearable E-Textile Applications Article 10.1021/acsnano.0c07143 1 ACS NANO, v.14, no.12, pp.17213 - 17223 ACS NANO 14 12 17213 17223 N scie scopus 000603308800082 2-s2.0-85097779532 Chemistry, Multidisciplinary Chemistry, Physical Nanoscience & Nanotechnology Materials Science, Multidisciplinary Chemistry Science & Technology - Other Topics Materials Science Article POLYMER BLEND TRANSPARENT FILMS ELECTRONICS fiber optoelectronic device electronic textile healthcare monitoring carbon nanotube microelectrodes transfer method