In this work, metal–organic frameworks (MOFs) were used as precursors to prepare Zn/Co oxide with a porous dodecahedral core-shell structure. Herein, a low-temperature self-assembly calcination and hydrothermal strategy of imidazole-based Zn-Co-MOF was used. As anode of lithium-ion batteries (LIBs), ZnO/Co3O4 has good cycling stability, the specific discharge capacity of ZnO/Co3O4 is stable at about 640 mAh g−1 after 200 cycles, and its coulombic efficiency (CE) is stable above 95% after the first 20 cycles. When the current density is 0.6 A/g, the discharge capacity is 420 mAh g−1. This excellent electrochemical performance is attributed to its unique porous hollow structure and unique heterojunction electrode interface, which improves the Li+ storage capacity, increases the contact area between the electrode and the electrolyte, and improves the overall electrochemical activity. In addition, the synergistic effect of ZnO and Co3O4 also plays an important role in improving the electrochemical performance.

Super-aligned multi-walled carbon nanotube arrays on Si wafer were synthesized by low press chemical vapor deposition. The super-thin multi-walled carbon nanotube films were obtained by a drawing process on the side of the vertically aligned carbon nanotubes. The as-synthesized samples were characterized by scanning electron microscopy and optical microscopy. Terahertz time-domain measurements showed that anisotropic transmission properties were observed. The multi-walled carbon nanotube films with various two-dimensional periods and thicknesses displayed remarkably enhanced transmission at the terahertz range. Comparing experimental results with theoretical calculations revealed that the excitation of surface plasmon polaritons on the carbon nanotubes/Si interface was the key mechanism responsible for the enhanced transmission. The resonance peaks were red shifted with increasing period. In the infrared region, no obvious resonance peaks were observed.

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