TY - JOUR
T1 - The 'lightning' gold nanorods
T2 - Fluorescence enhancement of over a million compared to the gold metal
AU - Mohamed, Mona B.
AU - Volkov, Victor
AU - Link, Stephan
AU - El-Sayed, Mostafa A.
PY - 2000/2/11
Y1 - 2000/2/11
N2 - Gold nanorods capped with micelles and having an aspect ratio of 2.0-5.4 are found to fluoresce with a quantum yield which is over a million times that of the metal. For rods of the same width, the yield is found to increase quadratically while the wavelength maximum increases linearly with the length. We assign this emission to the electron and hole interband recombination. The increase in the emission yield results from the enhancement effect of the incoming and outgoing electric fields via coupling to the surface plasmon resonance in the rods. This is similar to the previously proposed fluorescence and the Raman enhancement on noble metal rough surfaces.
AB - Gold nanorods capped with micelles and having an aspect ratio of 2.0-5.4 are found to fluoresce with a quantum yield which is over a million times that of the metal. For rods of the same width, the yield is found to increase quadratically while the wavelength maximum increases linearly with the length. We assign this emission to the electron and hole interband recombination. The increase in the emission yield results from the enhancement effect of the incoming and outgoing electric fields via coupling to the surface plasmon resonance in the rods. This is similar to the previously proposed fluorescence and the Raman enhancement on noble metal rough surfaces.
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U2 - 10.1016/S0009-2614(99)01414-1
DO - 10.1016/S0009-2614(99)01414-1
M3 - Article
AN - SCOPUS:0001180577
SN - 0009-2614
VL - 317
SP - 517
EP - 523
JO - Chemical Physics Letters
JF - Chemical Physics Letters
IS - 6
ER -