Center for Molecular Spectroscopy and Dynamics

121st Summer Symposium of KCS-Physical Chemistry Division (2016)

Gold nanorods (AuNRs) have shown great potentials in biological and biomedical application such as molecular imaging, drug delivery, or photothermal therapy[1]. The optical properties of these elongated nanoparticles depend on their shape anisometry. The AuNR-based longitudinal localized surface plasmon resonance (longitudinal LSPR) band is very sensitive to the AuNR’s aspect ratio and the surrounding local environment[2]. We investigate for the first time with a pulse-shaper-based two-dimensional electronic spectroscopy (2DES) these noble metal nanoparticles (Figure 1)..

Figure 1: 2DES spectra of AuNR at different waiting time.

References

[1] Huang XH; Neretina S; El-Sayed MA. Gold Nanorods From Synthesis and Properties to Biological and Biomedical Applications. Advanced Material S. 2009. 21, 4880-4910.

[2] Link S; Mohamed MB; El-Sayed MA. Simulation of the optical absorption spectra of gold nanorods as a function of their aspect ratio and the effect of the medium dielectric constant. Journal of Physical Chemistry B. 1999. 103, 3073-3077.