RESUMO
The performance of hybrid perovskite-based light-emitting diodes (LEDs) is markedly enhanced by the application of a NiOx electrode interlayer and moderate methylamine treatment. A hybrid perovskite-based LED exhibits a peak luminous efficiency of 15.9 cd A-1 biased at 8.5 V, 407.65 mA cm-2 , and 65 300 cd m-2 , showing a distinctive impact for future applications.
RESUMO
An 2,2'-azino-bis(3-ethylbenzthiazoline-6-sulfonic acid) (ABTS)-immobilized carbon nanotube (CNT) electrode was used to simultaneously detect dopamine (DA) and uric acid (UA) in the presence of ascorbic acid (AA) with differential pulse voltammetry. When ABTS was immobilized onto the CNT electrode in the presence of DA, UA and 100 µM AA, the sensitivity to DA increased from 0.600 (±0.013) to 1.334 (±0.010) µA/µM in the concentration ranges of 0.90-10 µM and 1.87-20 µM, respectively, and the sensitivity to UA increased from 0.030 (±0.005) to 0.078 (±0.006) µA/µM in the concentration ranges of 2.16-240 µM and 3.07-400 µM, respectively. These findings demonstrate that the ABTS-immobilized CNT electrode attained a higher sensitivity to UA and also a wider linear range of concentrations.
Assuntos
Benzotiazóis/química , Dopaminérgicos/sangue , Dopamina/sangue , Técnicas Eletroquímicas/instrumentação , Nanotubos de Carbono/química , Ácidos Sulfônicos/química , Ácido Úrico/sangue , Ácido Ascórbico/análise , Espectroscopia Dielétrica , Dopamina/análise , Dopaminérgicos/análise , Eletrodos , Humanos , Sensibilidade e Especificidade , Ácido Úrico/análiseRESUMO
Self-doped polyaniline (SPANI) ultrathin films were prepared by using a self-assembly process consisting of a self-doping monomer (o-aminobenzenesulfonic acid, SAN) and aniline (AN). SAN-AN copolymerization and film formation were simultaneously performed in aqueous solution. An immersing self-assembly method was developed to build up a SPANI nanofilm on an ITO glass, providing a hole injection layer in a double-layer electroluminescence (EL) device ITO/SPANI nanofilm//MEH-PV//Ca/Al. This device produces an orange EL as compared with a single-layer EL device of ITO//MEH-PV//Ca/Al. A double-layer device demonstrates that a SPANI film is capable of transporting holes in a polymer light-emitting diode (PLED).
