Fig. 3From: Designing of robust and sensitive assay via encapsulation of highly emissive and stable blue copper nanocluster into zeolitic imidazole framework (ZIF-8) with quantitative detection of tetracyclinea TEM image of CuNCs, b TEM image of ZIF-8, c–d TEM image of CuNCs@ZIF-8, e FE-SEM image of ZIF-8Back to article page