Figure 2From: Folic acid-conjugated silica capped gold nanoclusters for targeted fluorescence/X-ray computed tomography imagingExperimental procedure of AuNCs@SiO 2 -FA nanoprobes for dual-model imaging. TEM image of AuNCs (A) and AuNCs@SiO2 (B); (C) Excitation and emission spectra of gold nanoclusters (black curve) and AuNCs@SiO2 (red curve); (D) FTIR spectra of Au-NCs and AuNCs@SiO2 samples (powder obtained by freeze-drying).Back to article page