Covalent-Cross-Linked Plasmene Nanosheets
journal contributionposted on 30.05.2019 by Yiyi Liu, Bo Fan, Qianqian Shi, Dashen Dong, Shu Gong, Bowen Zhu, Runfang Fu, San H. Thang, Wenlong Cheng
Any type of content formally published in an academic journal, usually following a peer-review process.
Thiol-polystyrene (SH-PS)-capped plasmonic nanoparticles can be fabricated into free-standing, one-nanoparticle-thick superlattice sheets (termed plasmene) based on physical entanglement between ligands, which, however, suffer from irreversible dissociation in organic solvents. To address this issue, we introduce coumarin-based photo-cross-linkable moieties to the SH-PS ligands to stabilize gold nanoparticles. Once cross-linked, the obtained plasmene nanosheets consisting of chemically locked nanoparticles can well maintain structural integrity in organic solvents. Particularly, arising from ligand-swelling-induced enlargement of the interparticle spacing, these plasmene nanosheets show significant optical responses to various solvents in a specific as well as reversible manner, which may offer an excellent material for solvent sensing and dynamic plasmonic display.