Bouhelier Alexandre, Bachelot Renaud, Im Jin Seo, Wiederrecht Gary P, Lerondel Gilles, Kostcheev Sergei, Royer Pascal
Chemistry Division and Center for Nanoscale Materials, Argonne National Laboratory, Argonne, Illinois 60439, USA.
J Phys Chem B. 2005 Mar 3;109(8):3195-8. doi: 10.1021/jp046224b.
Single two-dimensional planar silver arrays and one-dimensional linear gold chains of nanoparticles were investigated by dark-field surface plasmon spectroscopy and studied as a function of interparticle distance, particle size, and number of particles. In agreement with recent theoretical predictions, a red shift of the surface plasmon resonance occurring in two-dimensional arrays was found for lattice spacings below 200 nm. This red shift is associated with a significant broadening of the resonance and is attributed to the onset of near-field interactions. We found that the relative contributions of the long-range and short-range interactions in two-dimensional arrays of particles are fundamentally different to those occurring in individual linear chains.
通过暗场表面等离子体光谱对二维平面银纳米颗粒阵列和一维线性金纳米颗粒链进行了研究，并将其作为颗粒间距离、颗粒尺寸和颗粒数量的函数进行了研究。与最近的理论预测一致，对于晶格间距小于200 nm的二维阵列，发现表面等离子体共振发生红移。这种红移与共振的显著展宽有关，并且归因于近场相互作用的开始。我们发现，二维颗粒阵列中长程和短程相互作用的相对贡献与单个线性链中发生的情况有根本不同。
