Chiral Photomelting of DNA-Nanocrystal Assemblies Utilizing Plasmonic Photoheating

• DOI: 10.1021/acs.nanolett.1c02479
• Publication Date: 2021-08-24T17:58:50Z
• Authors: Oscar Ávalos-Ovando; Lucas V. Besteiro; Artur Movsesyan; Gil Markovich; Tim Liedl; Kevin Martens; Zhiming Wang; Miguel A. Correa-...; Alexander O. Govorov
• Keywords: Photothermal effect; Chirality; Nanorod

Chiral plasmonic nanostructures exhibit anomalously strong chiroptical signals and offer the possibility to realize asymmetric photophysical photochemical processes controlled by circularly polarized light. Here, we use a chiral DNA-assembled nanorod pair as model system for photomelting. We show that both enantiomeric excess consequent circular dichroism can be with The nonlinear response of our results from photothermal effect leading selective melting DNA linker strands. Our study describes single-complex collective heating regimes, which should treated different models. asymmetry factors calculated photomelting effects exceed values typical molecular photochemistry at least 10-fold. proposed mechanism used develop photoresponsive systems controllable