An electrochemical biosensor with enhanced antifouling properties enabled by peptide self-assembly via robust Pt-S interactions
关键字：STRATEGIES
摘要：Designing effective biosensing interfaces requires robust biomolecule immobilization strategies. Traditional goldsulfur bonds (Au-S) have low affinity and are prone to ligand substitution reactions in complex biological environments. In this study, we introduce an innovative approach utilizing a trifunctional branched-cyclopeptide (TBCP) for self-assembly onto platinum nanoparticles (PtNP)-modified electrodes. TBCP immobilization on PtNP via Pt-S interaction proves significantly more stable than Au-S bonding. In addition, TBCP peptides assembled through Pt-S interactions exhibit low susceptibility to displacement by small molecules like glutathione, making them ideal for constructing robust biosensors with high stability in biological fluids. Leveraging peptide multifunctionality and strong Pt-S interactions, TBCP-modified electrodes excel in ious biological fluids, detecting the breast cancer marker ErbB2 in human serum. The high sensitivity of the TBCP/PtNP-based biosensor distinguishes serum samples from breast cancer patients and healthy individuals. This self-assembly strategy represents a promising advance in constructing biosensors with robust operation in complex biological media.
卷号：418
期号：-
是否译文：否
