Understanding metal-enhanced fluorescence and structural properties in Au@Ag core–shell nanocubes. Issue 50 (17th September 2019)

• Record Type: Journal Article
• Authors: Jung, Dae-Woong; Kim, Jun Min; Yun, Hyung Joong; Yi, Gi-Ra; Cho, Jung Young; Jung, Haeun; Lee, Gaehang; Chae, Weon-Sik; Nam, Ki Min
• Is Part Of: RSC advances. Volume 9:Issue 50(2019)
• Page Start: 29232
• Page End: 29237
• Publication Date: 2019-09-17
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/c9ra05103a
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : The unique ring-like building block of Au@AgNCs has dual optical functions as a fluorescence quencher and fluorescence enhancement medium. Abstract : Au@Ag core–shell structures have received particular interest due to their localized surface plasmon resonance properties and great potential as oxygen reduction reaction catalysts and building blocks for self-assembly. In this study, Au@Ag core–shell nanocubes (Au@AgNCs) were fabricated in a facile manner via stepwise Ag reduction on Au nanoparticles (AuNPs). The size of the Au@AgNCs and their optical properties can be simply modulated by changing the Ag shell thickness. Structural characterization has been carried out by TEM, SAED, and XRD. The metal-induced fluorescence properties of probe molecules near the Au@AgNCs were measured during sedimentation of the Au@AgNCs. The unique ring-like building block of Au@AgNCs has dual optical functions as a fluorescence quencher or fluorescence enhancement medium depending on the assembled regions.