Depolarized scattering of silver nanostructures in dye-less sensing

Pabak Sarkar; Tanya Shtoyko; Rafal Luchowski; Nils Calander; Aby Roth; Anne-Marie Brun-Zinkernagel; Zygmunt Gryczynski; Ignacy Gryczynski

doi:10.1117/12.841392

12 February 2010 Depolarized scattering of silver nanostructures in dye-less sensing

Pabak Sarkar, Tanya Shtoyko, Rafal Luchowski, Nils Calander, Aby Roth, Anne-Marie Brun-Zinkernagel, Zygmunt Gryczynski, Ignacy Gryczynski

Author Affiliations +

Proceedings Volume 7574, Nanoscale Imaging, Sensing, and Actuation for Biomedical Applications VII; 75740V (2010) https://doi.org/10.1117/12.841392
Event: SPIE BiOS, 2010, San Francisco, California, United States

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.

Citation Download Citation

Pabak Sarkar, Tanya Shtoyko, Rafal Luchowski, Nils Calander, Aby Roth, Anne-Marie Brun-Zinkernagel, Zygmunt Gryczynski, and Ignacy Gryczynski "Depolarized scattering of silver nanostructures in dye-less sensing", Proc. SPIE 7574, Nanoscale Imaging, Sensing, and Actuation for Biomedical Applications VII, 75740V (12 February 2010); https://doi.org/10.1117/12.841392

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available