Particle-in-a-Frame Nanostructures with Interior Nanogaps

Lee, Seunghoon; Kim, Jaeyoung; Yang, Hyunwoo; Cortes, Emiliano; Kang, Seungwoo und Han, Sang Woo (2019): Particle-in-a-Frame Nanostructures with Interior Nanogaps. In: Angewandte Chemie-International Edition, Bd. 58, Nr. 44: S. 15890-15894

Abstract

Designing plasmonic hollow colloids with small interior nanogaps would allow structural properties to be exploited that are normally linked to an ensemble of particles but within a single nanoparticle. Now, a synthetic approach for constructing a new class of frame nanostructures is presented. Fine control over the galvanic replacement reaction of Ag nanoprisms with Au precursors gave unprecedented Au particle-in-a-frame nanostructures with well-defined sub-2 nm interior nanogaps. The prepared nanostructures exhibited superior performance in applications, such as plasmonic sensing and surface-enhanced Raman scattering, over their solid nanostructure and nanoframe counterparts. This highlights the benefit of their interior hot spots, which can highly promote and maximize the electric field confinement within a single nanostructure.

• Dokumententyp: Zeitschriftenartikel
• Fakultät: Physik
• Themengebiete: 500 Naturwissenschaften und Mathematik > 530 Physik
• ISSN: 1433-7851
• Sprache: Englisch