Here, we report a facile and easily scalable hydrothermal synthetic strategy to synthesize Ni–V layered double hydroxide (NiV LDH) nanosheets toward high-energy and high-power-density supercapacitor applications. NiV LDH nanosheets with varying Ni-to-V ratios were prepared. Three-dimensional curved nanosheets of Ni 0.80 V 0.20 LDH showed better electrochemical performance compared to other synthesized NiV LDHs. The electrode coated with Ni 0.80 V 0.20 LDH nanosheets in a three-electrode cell configuration showed excellent pseudocapacitive behavior, having a high specific capacity of 711 C g –1 (1581 F g –1 ) at a current density of 1 A g –1 in 2 M KOH. The material showed an excellent rate capability and retained the high specific capacity of 549 C g –1 (1220 F g –1 ) at a current density of 10 A g –1 and low internal resistances. Owing to its superior performance, Ni 0.80 V 0.20 LDH nanosheets were used as positive electrode and commercial activated carbon was used as negative electrode for constructing a hybrid supercapacitor (HSC) device, having a working voltage of 1.5 V. The HSC device exhibited a high specific capacitance of 98 F g –1 at a current density of 1 A g –1 . The HSC device showed a higher energy density of 30.6 Wh kg –1 at a power density of 0.78 kW kg –1 and maintained a high value of 24 Wh kg –1 when the power density was increased to 11.1 kW kg –1 . The performance of NiV LDHs nanosheets indicates their great potential as low-cost electrode material for future energy-storage devices.

Triphenylene core-grafted 2,3,6,7,10,11-hexabutyloxytriphenylene (HAT4) discotic mesogens were synthesized and their composite matrices have been prepared by dispersing different concentrations of carbon dots (C-dots).

The high demand and scarcity of luminescent, photoconductive, and transparent gels necessitate its finding as they are potential components in photonic devices such as solar cell concentrators where optical losses via scattering and reabsorption require to be minimized. In this direction, we have reported highly transparent, blue luminescent as well as photoconductive gels exhibiting the hole mobility of 10 −3 cm 2 /V s at ambient temperature as investigated by the time-of-flight technique. The π-driven self-standing supergels were formed using triazole-modified phenylene-vinylene derivatives as gelators in a nonpolar solvent. Different microscopic studies revealed its entangled network of interwoven fibrilar self-assembly and anisotropic order in the gel state. Supramolecular assembly of xerogels, studied by small-and wide-angle Xray scattering (SAXS/WAXS) suggesting their local columnar hexagonal (Col h ) superstructure, is beneficial for conducting gels. Rheological measurements direct the stiffness and robustness of the organogels. In addition, the gelators were developed as a sensing platform for the ultrasensitive detection of Fe(II) ions at ppb level. 1 H nuclear magnetic resonance (NMR) titrimetric studies revealed that the interaction of the H-atom of triazole units with Fe(II) is responsible for quenching of blue fluorescence. Also, one of the gelators was successfully applied in bio-imaging using the pollen grains of the Hibiscus rosa-sinensis plant.