ORGS4-1234
Monolithically Integrated Fiber Organic Electrochemical Transistors for In-Plant Glucose Monitoring
Topic
GS4. Graduate Student Oral Session IV: Polymers for Electronics, Photonics, and Energy
When and Where
Sep 28, 2026
16:12 - 16:24
Room 104
Session Chairs
Hobeom KIM
Giwon LEE
Hyeong Jun KIM
Presenter(s)
Jonghyun Won (Ajou university)
Co-Author(s)
Abstract
Organic electrochemical transistors (OECTs) have emerged as promising platforms for biosensing owing to their efficient ion–electron coupling, intrinsic biocompatibility, and high transconductance. However, conventional planar OECTs remain challenging to implement for in-plant applications because their rigid, planar geometry limits minimally invasive implantation and complicates the monolithic integration of transistor components on a single probe.
Here, we present monolithically integrated fiber organic electrochemical transistors (OECTs) for minimally invasive glucose monitoring in plants. The devices are directly fabricated on 200-µm-diameter optical fibers using high-resolution photolithography, enabling precise definition of the channel architecture and accurate alignment of the source, drain, and gate electrodes on a single fiber. The PEDOT:PSS channel provides efficient volumetric ion–electron coupling, enabling rapid modulation of channel conductivity in response to glucose-induced electrochemical reactions.
The resulting fiber OECTs exhibit a high transconductance exceeding 19 mS with excellent signal-to-noise characteristics, enabling sensitive and reliable detection of glucose over a wide concentration range under in situ conditions. Compared with conventional electrode-based sensing platforms, the monolithically integrated fiber architecture minimizes tissue damage, improves mechanical compliance, and enhances operational stability during implantation.
These results establish monolithically integrated fiber OECTs as a versatile bioelectronic platform for continuous in-plant metabolic monitoring and provide a scalable strategy for implantable bioelectronics capable of interfacing with complex living systems.
Here, we present monolithically integrated fiber organic electrochemical transistors (OECTs) for minimally invasive glucose monitoring in plants. The devices are directly fabricated on 200-µm-diameter optical fibers using high-resolution photolithography, enabling precise definition of the channel architecture and accurate alignment of the source, drain, and gate electrodes on a single fiber. The PEDOT:PSS channel provides efficient volumetric ion–electron coupling, enabling rapid modulation of channel conductivity in response to glucose-induced electrochemical reactions.
The resulting fiber OECTs exhibit a high transconductance exceeding 19 mS with excellent signal-to-noise characteristics, enabling sensitive and reliable detection of glucose over a wide concentration range under in situ conditions. Compared with conventional electrode-based sensing platforms, the monolithically integrated fiber architecture minimizes tissue damage, improves mechanical compliance, and enhances operational stability during implantation.
These results establish monolithically integrated fiber OECTs as a versatile bioelectronic platform for continuous in-plant metabolic monitoring and provide a scalable strategy for implantable bioelectronics capable of interfacing with complex living systems.
