Binary colloidal clusters with quantum dots for nanoscopic device applications

Abstract

Colloidal clusters have garnered significant interest for their ability to elucidate nanoscopic phenomena in atomic arrangements and to enable the fabrication of complex nanostructures for advanced photonic and electronic applications. This study introduces a novel approach using binary colloidal clusters composed of semiconducting quantum dots and conductive gold-coated latex microspheres, fabricated via evaporation-driven self-assembly within emulsion droplets. This configuration not only demonstrates the binary colloidal clusters' capability for self-organization but also highlights the distinct regions formed by the smaller quantum dots, crucial for the electrical functionality of these nanoscopic devices. We have observed diode-like rectification behavior in these binary colloidal clusters, demonstrating their potential as active nanoscopic devices. Our findings present groundbreaking methodologies for integrating semiconductive and conductive materials in a colloidal form, offering a scalable and versatile platform for the development of next-generation devices in photonics and nanoelectronics.