Polymer-based flexible NO_x sensors with ppb-level detection at room temperature using breath-figure molding

Abstract

A direct/facile strategy for synchronizing the gas receptor and signal transport layers is demonstrated for highly sensitive flexible NOx sensors.

Organic thin film transistors‐based biosensors

“…To further improve operational stability in solution, π-conjugated donor-acceptor copolymers have been extensively used for many highperformance OTFTs-based biosensors. 52,62,63 Understanding carrier transportation properties between the OSC layer and the water interface is also important for designing high-performance water-gated OFETs-based biosensors. In this regard, the charge carrier transportation at the interface between the OSC layer and water was studied by Zhang et al, 64 the results of which give suggestions for material selection and interface design in biomedical applications.…”

“…To reduce charge‐screening effects, water‐gated OFETs are utilized instead of EGOFETs in order to improve the sensitivity of OTFTs‐based biosensors with λ D = 206 nm, 61 that is, much longer than most charged biomolecules. To further improve operational stability in solution, π‐conjugated donor‐acceptor copolymers have been extensively used for many high‐performance OTFTs‐based biosensors 52,62,63 . Understanding carrier transportation properties between the OSC layer and the water interface is also important for designing high‐performance water‐gated OFETs‐based biosensors.…”

MoS2–xSex Nanoparticles for NO Detection at Room Temperature

“… However, one drawback of these kinds of materials is the high operating temperature which prevents from using them in our daily life. The other candidate materials for room temperature NO detection devices are graphene, , conductive polymers, and also carbon nanotubes . Graphene with excellent physical properties such as high specific surface area and fast electron transport kinetics is promising to be applied as a detection material. , However, the graphene detection device has exhibited a relatively low response due to a small contact resistance.…”

Dual-Mode Polymer-Based Temperature Sensor by Dedoping of Electrochemically Doped, Conjugated Polymer Thin Films

“…Solution deposition of materials can transform the fabrication process of optoelectronic devices and sensors from the microscale to the macroscale, thus reducing the cost/m 2 from the order of $100 000/m 2 to ∼$1 000/m 2 . Conjugated polymer (organic) based optoelectronic devices and sensors have been investigated extensively due to their low-cost, solution-deposition-based fabrication as well as flexible device applications. − Conjugated polymers are among the materials that exhibit electrical and optical properties that are sensitive to minor perturbations in their chemical and physical environment, which can be exploited for a sensory response. − Additionally, polymer-based sensors are versatile in terms of applications, owing to the tunability of their electrical and optical properties. − In particular, polymer-based temperature sensors (PBTS) have been researched for food packaging, air conditioning, wearable devices, and biomedical applications for which more traditional temperature sensors based on thermocouples, thermistors, and resistance temperature detectors are not practical due to the involvement of electromagnetic disturbances. − Conventionally, PBTS have been designed based on two strategies. One of the strategies is the stress-optical effect (SOF) that translates to a change in the refractive index of the polymer with varying temperature. − The change in the refractive index is caused by the induction of mechanical stress as a response to the change in temperature.…”