Seeded growth of ultrathin gold nanoshells using polymer additives and microwave radiation.

ABSTRACT: Nanoshells made of a silica core and a gold shell possess an optical response that is sensitive to nanometer-scale variations in shell thickness. The exponential red shift of the plasmon resonance with decreasing shell thickness makes ultrathin nanoshells (less than 10 nm) particularly interesting for broad and tuneable ranges of optical properties. Nanoshells are generally synthesised by coating gold onto seed-covered silica particles, producing continuous shells with a lower limit of 15 nm, due to an inhomogeneous droplet formation on the silica surface during the seed regrowth. In this paper, we investigate the effects of three variations of the synthesis protocol to favour ultrathin nanoshells: seed density, polymer additives and microwave treatment. We first maximised gold seed densit

SUBMITTER: Lermusiaux L 

PROVIDER: S-EPMC8426366 | biostudies-literature | 2021 Sep

REPOSITORIES: biostudies-literature