The bimetallic nanoparticles and smart microgels/hydrogels are a particularly interesting combination that have received a lot of attention over the past ten years. These composite materials (bimetallic nanoparticles loaded in smart microgels/hydrogels) are a worthy candidate for a wide range of biological, environmental, and catalytic applications due to the sensitive behavior of microgels in their hybrid sys-tems. There are numerous morphologies and architectural designs for hybrid microgels based on bimetal-lic nanoparticles reported in the literature. The morphology of microgels in hybrid systems is the key for their usage. For this reason, a specific assembly of hybrid microgels based on bimetallic nanoparticles is designed, specifically, for a particular purpose. This article reviews current developments in the synthesis, classification, characterization, properties, and applications of bimetallic nanoparticles loaded in micro -gels. The applications of bimetallic nanoparticles loaded in microgels in the environment, biomedicine, sensing, and catalysis have been covered in a tutorial approach.(c) 2023 Elsevier B.V. All rights reserved.
