Solid-Phase Immunoassay of Polystyrene-Encapsulated Semiconductor Coreshells for Cardiac Marker Detection

Figure 5

AFM image of (a) bare glass chip surface (scan size: 500 nm × 500 nm), (b) APTES/GA modified glass chip surface (scan size: 500 nm × 500 nm), (c) immobilized protein A layer (scan size: 500 nm × 500 nm), and (d) CdSe/ZnS QDs with sandwich-type immunoassay (scan size: 2.5 μm × 2.5 μm).

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(b)

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(d)