In this contribution, we have shown that the organic fluorophores, 5-oxo-3,5-dihydro-2H-thiazolo [3,2-a] pyridine-3,7-dicarboxylic acid (TPDCA) and 5-oxo-3,5-dihydro-2H-thiazolo [3,2-a] pyridine-7-carboxylic acid (TPCA), are the main ingredients and fluorescence origins of N,S-CDs via systematic analyses. It inspires us to deeply analyze and understand the fluorescence origins of carbon dots with high fluorescence quantum yields, which will expand their applications.

Ternary transition metal oxides (TTMOs) have attracted considerable attention for rechargeable batteries because of their fascinating properties. However, the unsatisfactory electrochemical performance originating from the poor intrinsic electronic conductivity and inferior structural stability impedes their practical applications. Here, the novel hierarchical porous NiO/β‐NiMoO4 heterostructure is fabricated, and exhibits high reversible capacity, superior rate capability, and excellent cycling stability in Li‐ion batteries (LIBs), which is much better than the corresponding single‐phase NiMoO4 and NiO materials. The significantly enhanced electrochemical properties can be attributed to its superior structural characteristics, including the large surface area, abundant pores, fast charge transfer, and catalytic effect of the intermediate product of metallic nickel. The NiO/β‐NiMoO4 heterostructure delivers a high capacity of 1314 mA h g−1 at 0.2 A g−1 after 100 cycles. Furthermore, even after 400 cycles at 1 A g−1, the reversible capacity remains at around 500 mA h g−1. These results indicate that the NiO/β‐NiMoO4 heterostructure shows great potential as an anode material for high‐performance LIBs.

Heteroepitaxial growth of well‐aligned ZnO nanorod arrays on GaAs (111) substrates was achieved through electrochemical deposition at low temperature without any buffer layers for the first time. Structural analysis demonstrated the epitaxial orientation relationship of ZnO(0001)//GaAs(111). The rod density was dependent on the applied current density. These ZnO nanorods had high crystalline quality andexhibited strong UV near‐edge photoluminescence with a 106 meV full‐width at half‐maximum and very weak deep level emission. Furthermore, the patterned growth was facially implemented by using surface masks on cathode substrates. These results are envisaged to advance the development of ZnO nanorod‐based heterojunctions and their applications in optoelectronics.