TY  - JOUR
A1  - Kiel, Mareike
A1  - Kloetzer, Madlen
A1  - Mitzscherling, Steffen
A1  - Bargheer, Matias
T1  - Measuring the Range of Plasmonic Interaction
JF  - Langmuir
N2  - When gold nanoparticles are covered with nanometric layers of transparent polyelectrolytes, the plasmon absorption spectrum A(lambda) increases by a factor of approximately three and shifts to the red. These modifications of dissipative experimental observables stop when the cover layer thickness approaches the particle diameter. Spectral modifications of dispersive parameters like the reflection R, however, keep changing with increasing cover layer thickness. The shift of the plasmon resonance caused by two interacting particle layers is studied as a function of the separating distance between the two layers. We discuss these observations in the context of an effective medium theory and conclude that it can only be applied for a layer thickness on the order of the particle diameter.
Y1  - 2012
U6  - https://doi.org/10.1021/la204577m
SN  - 0743-7463
VL  - 28
IS  - 10
SP  - 4800
EP  - 4804
PB  - American Chemical Society
CY  - Washington
ER  -