Yes, SPRs can be tuned by altering the physical parameters of the nanoparticles. Factors such as the size, shape, composition, and surrounding environment of the nanoparticles can influence the resonance frequency. For example, increasing the size of a gold nanoparticle will generally red-shift the SPR frequency, while changing the shape from a sphere to a rod can split the resonance into multiple modes. This tunability is highly advantageous for designing nanoparticles with specific optical properties for targeted applications.
