Spectrally-resolved atomic-scale length variations of gold nanorods.
Functionality of gold nanorod structures as ultra-sensitive optical rulers is demonstrated. Arrays of gold nanorods were fabricated by electron beam lithography and lift-off techniques with high accuracy and uniformity. Their longitudinal plasmon scattering spectra were found to exhibit extreme sensitivity to the length of the nanorods. This phenomenon enables optical detection of the nanorod length variations comparable to the thickness of a few atomic layers of gold.
Ueno
Kosei
K
Research Institute for Electronic Science, Hokkaido University, Sapporo 001-0021, Japan.
Juodkazis
Saulius
S
Mizeikis
Vygantas
V
Sasaki
Keiji
K
Misawa
Hiroaki
H