[en] Highlights: • Flexible layered RuO₂·1.18H₂O/PEDOT-PSS film was prepared through filtration. • The film had good mechanical property and high electrical conductivity. • The film showed high specific capacitance of 591 F g^-1 at 10 mV s⁻¹. • The film exhibited high energy density of 18 Wh kg⁻¹ at 5000 W kg⁻¹. • The capacitance retention of the film was 91.5% after 5000 cycles at 10 A g⁻¹. A micron-thick flexible layered RuO₂·1.18H₂O/PEDOT-PSS film with high electric conductivity of about 306 S cm⁻¹ (sheet resistance of film of 7.1 Ω sq⁻¹) was prepared using commercial PEDOT-PSS dispersion and RuO₂·1.18H₂O nanoparticles through a simple, low-cost vacuum filtration technology. The layered flexible film could be used as a rope to hang up 300 gram weight and as a conducting wire in a circuit to light a blue LED lamp. The symmetrical supercapacitor based on the layered flexible films showed high specific capacitance of 591 F g⁻¹ (volumetric specific capacitance of 530 F cm⁻³) at 10 mV s⁻¹, excellent long-term cycling stability (capacitance retention of 91.5%) after 5000 cycles, and high energy density of 18 Wh kg⁻¹ at high power density of 5000 W kg⁻¹. The flexible film as function as current collector and active material simultaneously will have practical application in miniaturized flexible supercapacitors.

[en] Two-dimensional MoS₂ materials have attracted more and more interest and been applied to the field of energy storage because of its unique physical, optical, electronic and electrochemical properties. However, there are no reports on high-stable transparent MoS₂ nanofilms as supercapacitors electrode. Here, we describe a transparent 1T-MoS₂ nanofilm electrode with super-long stability anchored on the indium tin oxide (ITO) glass by a simple alternate layer-by-layer (LBL) self-assembly of a highly charged cationic poly(diallyldimethylammonium chloride) (PDDA) and negative single-/few-layer 1T MoS₂ nanosheets. The ITO/(PDDA/MoS₂)₂₀ electrode shows a transmittance of 51.6% at 550 nm and obviously exhibits excellent transparency by naked eye observation. Ultrasonic damage test validates that the (PDDA/MoS₂)₂₀ film with the average thickness about 50 nm is robustly anchored on ITO substrate. Additionally, the electrochemical results indicate that the ITO/(PDDA/MoS₂)₂₀ film shows areal capacitance of 1.1 mF cm⁻² and volumetric capacitance of 220 F cm⁻³ at 0.04 mA cm⁻², 130.6% retention of the original capacitance value after 5000 cycles. Further experiments indicate that the formation of transparent (PDDA/MoS₂) _x nanofilm by LBL self-assembly can be extended to other substrates, e.g., slide glass and flexible polyethylene terephthalate (PET). Thus, the easily available (PDDA/MoS₂) _x nanofilm electrode has great potential for application in transparent and/or flexible optoelectronic and electronics devices. (paper)

[en] Fullerenes (C_6_0) and metallofullerenes (Gd@C_8_2) have similar chemical structure, but the bio-effects of both fullerene-based materials are distinct in vivo. Tracking organic carbon-based materials such as C_6_0 and Gd@C_8_2 is difficult in vivo due to the high content of carbon element in the living tissues themselves. In this study, the biodistribution and metabolism of fullerenes (C_6_0 and Gd@C_8_2) radiolabeled with "6"4Cu were observed by positron emission tomography (PET). "6"4Cu–C_6_0 and "6"4Cu–Gd@C_8_2 were prepared using 1, 4, 7, 10-tetrakis (carbamoylmethyl)-1, 4, 7, 10-tetra-azacyclodo-decanes grafted on carbon cages as a chelator for "6"4Cu, and were obtained rapidly with high radiochemical yield (≥90%). The new radio-conjugates were evaluated in vivo in the normal mouse model and tissue distribution by small animal PET/CT imaging and histology was carried out. The PET imaging, the biodistribution and the excretion of C_6_0 and Gd@C_8_2 indicated that C_6_0 samples have higher blood retention and lower renal clearance than the Gd@C_8_2 samples in vivo and suggested that the differences in metabolism and distribution in vivo were caused by the structural differences of the groups on the fullerene cages though there is chemical similarity between C_6_0 and Gd@C_8_2. (paper)