Collective Plasmonic Properties in Few-Layer Gold Nanorod Supercrystals.

ABSTRACT: Gold nanorod supercrystals have been widely employed for the detection of relevant bioanalytes with detection limits ranging from nano- to picomolar levels, confirming the promising nature of these structures for biosensing. Even though a relationship between the height of the supercrystal (i.e., the number of stacked nanorod layers) and the enhancement factor has been proposed, no systematic study has been reported. In order to tackle this problem, we prepared gold nanorod supercrystals with varying numbers of stacked layers and analyzed them extensively by atomic force microscopy, electron microscopy and surface enhanced Raman scattering. The experimental results were compared to numerical simulations performed on real-size supercrystals composed of thousands of nanorod building blocks.

SUBMITTER: Hamon C 

PROVIDER: S-EPMC4898864 | biostudies-literature | 2015 Oct

REPOSITORIES: biostudies-literature