Sensitive Colorimetric Detection of Heparin Using Reverse Modulation of Peroxidase- and Oxidase-Mimetic Activities in Fe3O4@PDA@MnO2 Nanocomposites

Heparin, a widely studied glycosaminoglycan, plays crucial roles in the regulation of various physiological and pathological processes. Therefore, it's important to develop highly selective and sensitive methods for convenient monitoring of heparin levels in biological systems. We report the design and synthesis of Fe