A dual-mode PEG–Fe(ii) micro-assembly enabling fluorescence quenching, covalent modification and colorimetric detection

Abstract

A stable, water-soluble PEG–Fe(II) coordination micro-assembly achieves rapid, low-cost detection through efficient fluorescence quenching, covalent functionalization, and instant colorimetric readout. Engineered for simplicity and robustness, it enables affordable, field-ready diagnostics ideally suited for resource-limited settings and the urgent global need for scalable infectious-disease testing.