silver NPs remained after they were assembled on the fiber surface.
We further used XPS to characterize the wool fabrics before and
after the coloration with nanoprism I (Fig. 5). The normal components
of the wool fiber appeared as peaks of (O 1s), (N 1s), (C 1s)
(Fig. 5a and b) and (S 2p) (Supplementary Fig. S4). The peaks of
(Ag 3d) in Fig. 5a and c demonstrate the existence of silver NPs on
the modified wool fibers. Even though the loading of silver NPs on
the fiber surface was small, the colors of the wool fabric were vivid
because of the unique LSPR property of the noble metal NPs.