Robust Development of Gold Nanorod-Quantum Dot Assemblies for Dynamic Dual-Modal Single Nanoparticle Imaging and...

Area of Science:

• Colloidal science
• Nanotechnology
• Optical microscopy

Background:

• Dynamic imaging of nanoparticles is crucial for characterization and applications.
• Single optical modalities limit the analysis of complex nanoparticle systems.
• Correlated imaging is typically restricted to surface-confined nanoparticles.

Purpose of the Study:

• To develop a dual-modal optical microscopy setup for imaging nanoparticle assemblies in suspension.
• To create functionalized gold nanorod core - quantum dot (AuNR-QD) conjugates.
• To enable correlated imaging of nanoassemblies with different detection sensitivities.

Main Methods:

• Preparation of polymer-wrapped AuNR-QD conjugates via two distinct routes.
• Development of a dual-modal setup combining Rayleigh scattering and fluorescence imaging.
• Real-time imaging and tracking of AuNR-QD nanoassemblies in suspension.

Main Results:

• Successful synthesis of stable AuNR-QD conjugates.
• Demonstration of correlated plasmonic-enhanced Rayleigh scattering and fluorescence imaging.
• Assessment of QD conjugation efficiency using real-time dual-modal imaging.

Conclusions:

• The developed dual-modal approach enables robust characterization of nanoparticle assemblies in suspension.
• This method overcomes limitations of single-modality imaging for complex nanoparticle systems.
• The AuNR-QD conjugates provide a versatile platform for advanced nanotechnology applications.