Fig. 1From: A dual-quenched ECL immunosensor for ultrasensitive detection of retinol binding protein 4 based on luminol@AuPt/ZIF-67 and MnO2@CNTsA Low-magnifcation and B high-magnification TEM image of ZIF-67. C Low-magnification and D high-magnification TEM image of AuPt/ZIF-67. The inset is the size distribution of AuPt NPs. E STEM-EDS mappings of AuPt/ZIF-67. F XPS high resolution spectra of AuPt/ZIF-67Back to article page