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Palladium (Pd)‐modified metal oxide semiconductors (MOSs) gas sensors often exhibit unexpected hydrogen (H2) sensing activity through a spillover effect. However, sluggish kinetics over a limited Pd‐MOS surface seriously restrict the sensing process. Here, a hollow Pd‐NiO/SnO2 buffered nanocavity is engineered to kinetically drive the H2 spillover over dual yolk‐shell surface for the ultrasensitive...
The unsaturated coordination and abundant active sites endow amorphous metals with tremendous potential in improving metal oxide semiconductors’ gas‐sensing properties. However, the amorphous materials maintain the metastable status and easily transfer into the lower‐active crystals during the gas‐sensing process at high working temperatures, significantly limiting their further applications. Here,...
NIR‐IIa Cell Tracker
In article number 2105362, Jen‐Shyang Ni, Kai Li, and co‐workers design a series of NIR‐II fluorophores through a heteroatom‐inserted electron delocalization strategy, which is used as a NIR‐IIa cell tracker to dynamically track the homing of transplanted stem cells in the acute lung injury model.
Fluorophores with emission in the second near‐infrared (NIR‐II) window have displayed salient advantages for biomedical applications. However, exploration of new luminogens with high NIR‐II fluorescent brightness is still challenging. Herein, based on the “ring‐fusion” strategy, a series of heteroatom‐inserted rigid‐planar cores is proposed to achieve the bathochromic NIR‐II fluorophores with aggregation‐induced...
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