@inproceedings{bdf9f1a777874f9f9f182e7fc1f2d27f,
title = "Depolarized scattering of silver nanostructures in dye-less sensing",
abstract = "Scattering from noble metallic nanoparticles with specific structures are strongly depolarized in contrast to dielectric particles. The effect depends on the shape and symmetry of the nanoparticles and can be explained by induced plasmonic multi-resonances along different axes of symmetry. In our experiments we found that the scattering from 'nanorod' structures of silver is more polarized than globular colloidal silver nanostructures. The depolarized scattering can be tuned to the near-infrared region by using proportionate mixture of the colloids and nanorods. We demonstrate this effect in solution as well as in polymer films where nanoparticles were immobilized. This phenomenon of depolarized scattering is promising for designing dye-less sensing devices useful in diagnostics. We show scattering polarization profile from asymmetric nanostructures changes during their aggregation. Modulating the rate of aggregation of these nanostructures by 'receptor - ligand'-like interactions can be successfully utilized for sensitive 'dye-less' diagnostics.",
keywords = "Nanostructures, Polarization, Size-aspect ratio",
author = "Pabak Sarkar and Tanya Shtoyko and Rafal Luchowski and Nils Calander and Aby Roth and Brun-Zinkernagel, {Anne Marie} and Zygmunt Gryczynski and Ignacy Gryczynski",
year = "2010",
month = may,
day = "3",
doi = "10.1117/12.841392",
language = "English",
isbn = "9780819479709",
series = "Progress in Biomedical Optics and Imaging - Proceedings of SPIE",
booktitle = "Nanoscale Imaging, Sensing, and Actuation for Biomedical Applications VII",
note = "Nanoscale Imaging, Sensing, and Actuation for Biomedical Applications VII ; Conference date: 25-01-2010 Through 28-01-2010",
}