Self‐assembled core‐shell structured organic nanofibers fabricated by single‐nozzle electrospinning for highly sensitive ammonia sensors

Abstract

Electrospinning is a unique method to prepare 1‐dimentional nanofiber for large‐scale manufacturing. Here in, we demonstrated chemical sensors based on the semiconducting nanofibers with core‐shell structure by simple single‐nozzle electrospinning with the spontaneous phase separation. The core‐shell structure nanofiber has large active sites which make it highly sensitive to chemical analytes. The thickness of the sensing shell can be tuned by controlling the mass ratio of core and shell components. As a demonstration, the nanofiber‐based sensor exhibits high sensitivity to low‐concentration ammonia (ppb level), as well as stability and reversibility. This unique fast single‐nozzle electrospinning technique used to fabricate semiconducting nanofibers with core‐shell structure provides a facile and designable process for the integration of multifunctional organic semiconducting layer into the organic electronic system.

The Design of 3D‐Interface Architecture in an Ultralow‐Power, Electrospun Single‐Fiber Synaptic Transistor for Neuromorphic Computing

“…Poly(3, 3′″‐didodecyl quarter thiophene) (PQT‐12) and poly(ethylene oxide) (PEO) were utilized to prepare semiconducting fiber. The electrospun fibers exhibit core–shell structure with the PQT‐12 in the shell layer, which can be proved from the TEM image (Figure S2b, Supporting Information) and our previous report 29. The thin shell PQT‐12 makes the conductance (weight) facile to be tuned by electric stimuli from the gate electrode.…”

“…This ultralow excitation voltage and ultralow energy consumption are attributed to the structure of the 3D organic semiconducting polymer/solid ionic dielectric interface with the large contact area for a lot of ions to attach. The thin PQT‐12 shell from the self‐assembling phase separation29 in the fiber electrospinning process makes the device highly sensitive to the ion migration in the dielectric (Figure S6, Supporting Information). Our SFFETs exhibit great potential for the construction of the practical artificial network.…”

Ultrasensitive Detection of Electrolyte Leakage from Lithium-Ion Batteries by Ionically Conductive Metal-Organic Frameworks

“…Our team has been committed to the development of highly sensitive chemical sensors. [14][15][16] To realize the detection of LIB electrolytes, we set the goal of detecting their solvents, utilizing metal-organic frameworks (MOFs) as sensing materials. MOFs constructed of organic ligands and metal cations/clusters by self-assembly are an emerging family of functional materials, [17][18][19][20][21] which have been applied in devices such as solar cells, 22,23 radiation detectors, 24 and chemical sensors.…”

Fabrication of Stretchable and Transparent Core–Shell Polymeric Nanofibers Using Coaxial Electrospinning and Their Application to Phototransistors

“…Core–shell structured NFs can be fabricated directly through electrospinning using a uniaxial nozzle [ 39–40 ] or a coaxial nozzle [ 41–44 ] or through the deposition of a shell onto the surface of electrospun NFs. [ 45–46 ] However, core–shell NFs have seldom been fabricated from uniaxial nozzle electrospinning because of limitations arising from the miscibility and solubility of the materials.…”