A facile strategy is reported for design and preparation of flexible micro‐supercapacitors on a chip based on patterned electrodes of conducting polyaniline nanowire arrays. The interdigital microelectrode is produced by combining microfabrication technology and an in‐situ chemical polymerization approach. The assembled flexible micro‐supercapacitor showed superior volumetric capacitance, fast rate capability and reduced leakage current using H2SO4‐ polyvinyl alcohol gel electrolytes.

No abstract

Self-assembled, one-dimensional nanostructures of N,N′-bis(2-(trimethylammonium iodide)ethylene)perylene-3,4,9,10-tetracarboxyldiimide (PTCDI-I) with tunable morphologies were successfully prepared by a facile evaporation method. PTCDI-I nanotubes with diameters of approximately 100-300 nm were obtained by the evaporation of the aqueous solution of PTCDI-I, while long nanorods with diameters of approximately 200-300 nm were produced by slow evaporation of the methanolic solution of PTCDI-I. Studies of the nanostructures formed at different stages suggested that the formation of nanotubes and nanorods could be ascribed to different crystallization processes from different solutions. The PTCDI-I nanostructures were redox-active, and fourprobe measurements based on a single nanotube or nanorod exhibited resistance decreased by 2 to 3 orders of magnitude after being exposed to reducing agents such as hydrazine or phenylhydrazine. Such high resistance modulations indicate that these nanostructures will be useful as building blocks for electronic nanodevices and sensors.