High-precision measurement-based correlation studies among atomic force microscopy, Rayleigh scattering, and surface-enhanced Raman scattering at the single-molecule level

Literature Information

Publication Date 2013-01-08
DOI 10.1039/C3CP43817A
Impact Factor 3.676
Authors

Hae Mi Lee, Jung-Hoon Lee, Hyung Min Kim, Seung Min Jin, Hyo Sun Park, Jwa-Min Nam, Yung Doug Suh


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Abstract

We investigated the correlations among the structure, Rayleigh scattering, and single-molecule surface-enhanced Raman scattering (SERS) of DNA-tethered Au–Ag core–shell nanoparticles, especially in dimer and trimer forms. For the optimal correlation measurements, accurate information on the position of the nanoparticle is crucial for locating the nanoparticle at the center of the excitation source for the optical measurements. To achieve this, we developed a multistep correlation strategy that enables us to unambiguously correlate the AFM images with optical images within a few nanometers. We also newly defined the correlation accuracy in this paper as a useful concept for the correlation measurements. With this reliable correlation accuracy, we performed various statistical analyses to thoroughly elucidate the relationships between particle structure, Rayleigh scattering and SERS in terms of the incident polarization and scattering intensity ratio.

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Physical Chemistry Chemical Physics

Physical Chemistry Chemical Physics
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