Work

Enhancement of molecular circular dichroism with silver nanoparticles

Year: 2024

Type: article

Abstract: Plasmon resonances in metal nanoparticles provide a powerful way to amplify molecular circular dichroism (CD). In this paper, we use time-dependent density-functional theory to systematically investigate the CD enhancement of a molecule on a silver nanoparticle or sandwiched between two silver nanoparticles. We find that in both systems the enhancement increases roughly as the square root of the number of Ag atoms up to the considered 923-atom Ag particle. The enhancement in dimers is more significant. In addition, we analyze the influences of the molecular orientation, molecule-nanoparticle distance, and the molecular coverage on the CD enhancement.

Source: Physical review. B./Physical review. B

DOI: 10.1103/physrevb.110.115423

Authors: Ville J. Härkönen, Tuomas P. Rossi, Mikael Kuisma, Patrick Rinke, Xi Chen

Institutions: Tampere University, Aalto University, Technical University of Denmark, Technical University of Munich, Lanzhou University

Language: English

Topic: Plasmonic and Surface Plasmon Research

Subfield: Biomedical Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: green

Funders: National Natural Science Foundation of China, Academy of Finland

Awards: Computational study of fluorescent silver clusters with implications for biosensing and bioimaging applications, G6864986911, Plasmonic nanocatalysts for a sustainable future (PLASMOCAT), G8805052026