Becker Jan, Zins Inga, Jakab Arpad, Khalavka Yuriy, Schubert Olaf, Sönnichsen Carsten
Institute for Physical Chemistry, University of Mainz, Mainz, Germany.
Nano Lett. 2008 Jun;8(6):1719-23. doi: 10.1021/nl080720k. Epub 2008 May 3.
Silver coating gold nanorods reduces the ensemble plasmon line width by changing the relation connecting particle shape and plasmon resonance wavelength. This change, we term "plasmonic focusing", leads to less variation of resonance wavelengths for the same particle size distribution. We also find smaller single particle linewidth comparing resonances at the same wavelength but show that this does not contribute to the ensemble linewidth narrowing.
银包覆金纳米棒通过改变连接粒子形状和等离子体共振波长的关系来减小整体等离子体线宽。我们将这种变化称为“等离子体聚焦”，它使得相同粒径分布下的共振波长变化更小。我们还发现，在相同波长下比较共振时，单个粒子的线宽更小，但这对整体线宽变窄并无贡献。
