An ultrathin MnO2 nanosheet is established as a label-free two-dimensional nanoplatform for homogeneous biosensing. Two biosensors based on an MnO2 nanosheet with favourable performances are constructed for OTA and Cat D using different probes and following different sensing principles.

Recently, the compositional engineering of lead-free halide double perovskite materials (A2B+B3+X6) has attracted increasing research interests in terms of potential optoelectronic applications. Herein, antimony ions (Sb3+) are introduced to manipulate...