The electronic structure, energy barrier and charge redistribution of cyclo[18]carbon and cyclocarbon oxides [Formula: see text], [Formula: see text], [Formula: see text] on NaCl(001) surface were computationally studied by using MOPAC. The HOMO electronics are mainly distributed at the inner and outer circumferential half circle of the cyclo[18]carbon along triple C–C bonds. However, the LUMO electronics are distributed at above and below surfaces of the cyclo[18]carbon circle along single C–C bonds. The energy barrier is different along different direction. The energy barrier of cyclo[18]carbon on the NaCl surface is the smallest (0.23 eV/per atom). When the cyclo[18]carbon and cyclo[18]carbon oxides molecular are put on the NaCl surface, they show different amounts of positive charge, no longer neutral.

Nickel oxide (NiO) films for electrochromic prepared by chemical methods still have the problem of requiring high temperature treatment that limits its further application. In this study, electrophoretic deposition (EPD) was used to deposit NiO nanocrystallines onto transparent conducting oxide (TCO) substrates for electrochromic application. NiO nanocrystallines with a grain size of around 10.36 nm were synthesized by organic solvent method, and NiO suspension of 10 mg/mL was used in the EPD procedure under constant voltage of 4.5 V, 60 s at room temperature. The NiO films prepared by this method exhibit large optical modulation amplitude (54.1%) at 550nm, fast switching speed (coloring time is 7.3 s, bleaching time is 3.9 s), high coloration efficiency (25.7 cm 2 /C), and moderate cyclic durability. This study provides a simple and energy-saving way to deposit NiO films at room temperature, and all-solid-state complementary flexible electrochromic device (ECD) using electrochemically deposited WO 3 film and electrophoretic deposited NiO film was successfully assembled, which is conductive to expand electrochromic applications and its future commercialization.

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