High-purity foam-like micron-sized gold cage material with tunable plasmon properties.

ABSTRACT: Herein, by growing mono dispersed gold nanoparticles (MNPAu) on the surface of polystyrene (PS)/nanogold (Au) core-shell composites (PS@Au), we successfully synthesized a micron-sized gold cage (2.6-10.7 μm), referred to as PS@Au@MNPAu for the first time. The new micron-gold cage materials exhibit broadband absorption range from near-ultraviolet to near-infrared, which is unlike the conventional nanogold core-shell structure. The uniform growth of MNPAu on the surface forms a new photonic crystal spectrum. The strong coupling of the spectra causes anomalous absorption in the ultraviolet-near infrared band (400-900 nm). Furthermore, by removing the PS core, a nanogold cavity structure referred to as Au@MNPAu was prepared. This structure demonstrated a high purity (> 97 wt%), low density (9-

SUBMITTER: Dong S 

PROVIDER: S-EPMC7538574 | biostudies-literature | 2020 Oct

REPOSITORIES: biostudies-literature