Figure 1:

Normalized extinction spectra of Au@Ag (A top), GNS (B top) and silica-encapsulated gold clusters (C top). The corresponding TEM images demonstrated under each spectrum. Inset: high-resolution TEM images of nanomaterials. Red dashed line shows laser radiation at 632.8 nm (from a HeNe laser) [9, 13, 17].

© De Gruyter