Enhancing SERS Spectra through Surface-Doped Nanocluster Substrates: A Numerical Investigation of Plasmonic Silver Coated Pt and Pd Core-Shell-Satellite Structures

In our quest for cost-effective and durable solutions for sensing and antimicrobial applications, we have initiated a new study that examines the synergistic interaction between noble transition metal shells and an Ag plasmonic core incorporated within raspberry-shaped nanostructures. The investigation primarily addresses the limitations of bare Ag nanoparticles, which include susceptibility to corrosion, recrystallization, and contamination. To mitigate these challenges, we are exploring the use of Pd and Pt transition metal shells as protective layers. Encapsulating the Ag core with Pd or Pt shells not only protects it but also facilitates a shift in the plasmonic resonance wavelength from the UV to the visible spectrum. This shift broadens the functional capacities of these structures, enabling novel applications in solar-assisted photocatalytic catalysis and enhanced sensing capabilities with substrates. The study highlights the transformative potential of Ag@Pd@Ag and Ag@Pt@Ag raspberry-shaped nanostructures. By bridging the gap between UV-driven plasmon resonance and visible light applications, these nanostructures promise to open new avenues in the field of photocatalytic catalysis and sensing technologies.