The development of continuous conducting polymer fibres is essential for applications ranging from advanced fibrous devices to frontier fabric electronics. The use of continuous conducting polymer fibres requires a small diameter to maximize their electroactive surface, microstructural orientation, and mechanical strength. However, regularly used wet spinning techniques have rarely achieved this goal due primarily to the insufficient slenderization of rapidly solidified conducting polymer molecules in poor solvents. Here we report a good solvent exchange strategy to wet spin the ultrafine polyaniline fibres. The slow diffusion between good solvents distinctly decreases the viscosity of protofibers, which undergo an impressive drawing ratio. The continuously collected polyaniline fibres have a previously unattained diameter below 5 µm, high energy and charge storage capacities, and favorable mechanical performance. We demonstrated an ultrathin all-solid organic electrochemical transistor based on ultrafine polyaniline fibres, which operated as a tactile sensor detecting pressure and friction forces at different levels.
Elastic
moduli, E, of free-standing polystyrene
(PS) single-layers and polystyrene–polydimethylsiloxane (PS-PDMS)
bilayers are measured by uniaxial tensile testing at room temperature
under different strain rates, γ̇, and for PS thicknesses, h, from 8 to 130 nm. As γ̇ increases, E increases initially, then approaches the bulk value, E
bulk, when γ̇ exceeds a characteristic
value (≡ τ–1) that decreases with increasing h. The noted variation of E with γ̇
shows that stress relaxation occurs in the films during measurement
when γ̇τ ≪ 1, while the noted variation of
τ–1 with h shows that thinner
films relax faster. Consequently, E decreases with
decreasing h if γ̇ is small, but displays
independence of h if γ̇ is large. Visually,
the crossover takes place at around γ̇ = 0.0015 s–1, where at γ̇τ > 1 for all films.
Nanolasers based on surface plasmon opens up new platform for advanced nanophotonics technologies. [1][2][3][4][5][6] As Raman scattering process convert pump laser into new frequencies, so development of Raman nanolaser may allows for tunable nanolasers and boost the development of innovative nanophotonics technology. The Raman conversion for conventional Raman laser is intrinsically challenging as high intensities of the pump laser are required to drive the nonlinear effect. In recent years, miniaturization of Raman silicon laser has been successfully achieved with the assistance of reverse-biased p-i-n diode at centimeter size or photonics-crystal with high-quality-factor nanocavity at micrometer size. [7][8][9] However, for applications such as high-resolution medical imagings or on-chip optical communications, 'ultimate' nanolasers with scalable, thresholdless,
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.