Covalent-Cross-Linked Plasmene Nanosheets Yiyi Liu Bo Fan Qianqian Shi Dashen Dong Shu Gong Bowen Zhu Runfang Fu San H. Thang Wenlong Cheng 10.1021/acsnano.9b01343.s003 https://acs.figshare.com/articles/journal_contribution/Covalent-Cross-Linked_Plasmene_Nanosheets/8242676 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. 2019-05-30 00:00:00 SH-PS ligands gold nanoparticles one-nanoparticle-thick superlattice sheets interparticle spacing ligand-swelling-induced enlargement Covalent-Cross-Linked Plasmene Nanosheets Thiol-polystyrene solvent plasmonic display plasmene nanosheets show plasmene nanosheets coumarin-based photo-cross-linkable moieties