Kim, Yeonji Lee, Seung Won Jang, Jihye Kim, Woojoong Zan, Guangtao Lee, Seokyeong Kim, Taebin Kim, Gwanho Yoo, Jaemin Lee, Jung Hun Zhao, Kaiying Park, Tae Hyun Lee, Kyuho Jeong, Hayeon Oh, Jin Woo Park, Jong Woong Li, Shengyou Hersam, Mark C. Park, Cheolmin 2026-01-15T08:00:21Z 2026-01-15T08:00:21Z 2026-01-12 2025-12 1936-0851 https://pubs.kist.re.kr/handle/201004/154008 Despite the significant progress in the development of ionic junctions of two types of ionic conductors for ionic current rectification, reminiscent to electronic p- and n-type junctions, stimuli-responsive ionic junctions wherein stimuli reversibly control current rectification are seldom demonstrated. Here, we present a near-infrared (NIR)-responsive ionic junction and its application as a switchable logic gate. The NIR- responsive ionic junction is developed with a bilayer of ionoelastomers: liquid-free ionic conductors with mobile cations (p-type) and anion counterions (n-type) mixed with NIR-responsive 2D MXene (Ti3C2Tx) nanosheets sandwiched between two liquid metal electrodes. The study revealed that two types of MXene with positive and negative surface potentials incorporated into p- and n-type ionoelastomers, respectively, facilitated the diffusion of mobile ions. This resulted in an enhanced current rectification of an ionic diode. The rectification of an ionic junction is further increased upon NIR exposure to the device due to the photothermal energy conversion of MXene. A facile control of the rectification ratio with both exposure time and power of NIR enabled the development of a switchable ionic logic gate. Herein, the AND-to-OR gate transition was reversibly manipulated by NIR exposure and device cooling programmed to the two ionic junctions in series. English American Chemical Society Near-Infrared Responsive Ionoelastomer Junction Enabling Switchable Ionic Logic Gate Article 10.1021/acsnano.5c13433 1 ACS Nano, v.19, no.50, pp.42261 - 42274 ACS Nano 19 50 42261 42274 N scie scopus 001638340000001 2-s2.0-105025649058 Chemistry, Multidisciplinary Chemistry, Physical Nanoscience & Nanotechnology Materials Science, Multidisciplinary Chemistry Science & Technology - Other Topics Materials Science Article MXENE DIODE CAPACITANCE positively and negatively charged MXene nanosheets ionic junction diode photothermal energy conversion switchable logic gate ionoelastomer NIR-responsive current rectification