nn9b01343_si_003.pdf (1.65 MB)
Covalent-Cross-Linked Plasmene Nanosheets
journal contribution
posted on 2019-05-30, 00:00 authored by Yiyi Liu, Bo Fan, Qianqian Shi, Dashen Dong, Shu Gong, Bowen Zhu, Runfang Fu, San H. Thang, Wenlong ChengThiol-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.