Fig. 3: Excitation mechanisms for plasmon-induced chemical reactions. | Nature Communications

Fig. 3: Excitation mechanisms for plasmon-induced chemical reactions.

From: In-situ nanospectroscopic imaging of plasmon-induced two-dimensional [4+4]-cycloaddition polymerization on Au(111)

Fig. 3: Excitation mechanisms for plasmon-induced chemical reactions.

a Direct intramolecular excitation for a HOMO-LUMO transition. b Charge transfer mechanism from metal surfaces to adsorbate unoccupied states. c, d Indirect hot-carrier transfer from the metal surface to unoccupied states of the adsorbate c with and d without adsorbate/surface hybridization through inelastic tunneling processes. The localized surface plasmon (LSP) is a result of the strong coupling between metal-free electrons and incident electromagnetic field in the confined plasmonic system. Black and white dots indicate electrons (e−) and holes (h+), respectively. e The calculated projected DOSs of monomer 1 and 2 MLs on Au(111). The energy distribution of the hot electrons in the hotspots are highlighted. f, g The spatial distribution of the (blue) HOMO and (red) LUMO levels for monomer f 1 and g 2 MLs on Au(111), respectively. a.u. arbitrary units.

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