Miao Yue

Second harmonic generation (SHG) in twisted van der Waals heterostructures is conventionally interpreted as the coherent superposition of nonlinear contributions from the constituent monolayers. Herein, the twist-angle-dependent SHG response is systematically investigated in vertically stacked ${{\text{MoS}}_2}/{{\text{WS}}_2}$ heterostructures. Polarization-resolved SHG measurements reveal that the nonlinear response cannot be described by simple superposition of monolayer contributions.

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Accelerating photocatalytic hydrogen production by anchoring Pt single atoms on few-layer g-C3N4 nanosheets with Pt-N coordination Graphitic carbon nitride (g-C3N4) has gained considerable attention as a promising photocatalyst for hydrogen production through water splitting. However, its catalytic efficiency remains severely limited due to the rapid recombination of charge carrier and poor charge-transfer properties.