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Functional Sensing Interfaces of PEDOT:PSS Organic Electrochemical Transistors for Chemical and Biological Sensors: A Mini Review
摘要： Organic electrochemical transistors (OECTs) are promising devices for applications in in vitro and in vivo measurements. OECTs have two important sensing interfaces for signal monitoring: One is the gate electrode surface; the other is the channel surface. This mini review introduced the new developments in chemical and biological detection of the two sensing interfaces. Specific focus was given on the modification technological approaches of the gate or channel surface. In particular, some unique strategies and surface designs aiming to facilitate signal-transduction and amplification were discussed. Several perspectives and current challenges of OECTs development were also briefly summarized.
关键词： organic electrochemical transistors,interface functionalization,chemical sensors,biosensors
更新于2025-09-23 15:22:29
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Self-aligned, laser-cut organic electrochemical transistors
摘要： Organic electrochemical transistors (OECTs) are switches and sensor devices that take advantage of bulk transport of ionic/electronic species in the active channel material, resulting in high amplification and robust electrical characteristics. Traditional techniques used to pattern OECT channels often call for multiple photolithography steps, unwanted parasitic capacitance and waste of active material. In this work we introduce a new method for OECT patterning which makes use of a hydrophobic insulation layer combined with a laser cutting method that provides self-alignment of source/drain contacts, insulation and channel, and allows for the active material to be “dragged and dropped”, with a controlled volume deposited into laser-cut perforations. We show that different types of OECTs can be created on the flexible array, including free-standing and through-hole OECT channels, which may be advantageous in biological applications. We show that this method preserves the high performance of OECTs with good reproducibility across an array. In addition, we show that this method is compatible with flexible arrays which are sought in a number of different biosensing settings ranging from neural signal acquisition to regenerative applications. This approach takes advantage of the bulk transport inherent in OECTs to introduce a new fabrication method that opens new avenues for patterning bioelectronic sensors that may be otherwise limited with traditional patterning approaches.
关键词： laser cutting,OECTs,bioelectronic sensors,Organic electrochemical transistors,flexible arrays
更新于2025-09-16 10:30:52