Bruzzone Samantha, Malvaldi Marco, Arrighini Giovanni P, Guidotti Carla
Dipartimento di Chimica e Chimica Industriale, Università di Pisa, Via Risorgimento 35, 56100 Pisa, Italy.
J Phys Chem B. 2005 Mar 10;109(9):3807-12. doi: 10.1021/jp045451a.
Progress in near-field optical spectroscopy research on metal nanoparticles demands a better understanding of the role of particle-particle and tip-sample interactions. In this perspective, we investigate theoretically, at a very moderate level of sophistication, the optical behavior of simple silver nanoparticle aggregates, in terms of a formalism involving a multipolar expansion of the fields involved, along with a simplified model for the optical behavior of nanostructures previously developed. In particular, the tip-sample interaction is taken into account roughly, treating the tip as an additional, single particle, characterized by proper dielectric behavior.
金属纳米粒子近场光学光谱研究的进展需要更好地理解粒子间相互作用以及针尖与样品相互作用所起的作用。从这个角度出发，我们以一种较为适度的精细程度进行理论研究，依据涉及场的多极展开的形式体系以及先前开发的纳米结构光学行为简化模型，来探究简单银纳米粒子聚集体的光学行为。特别地，通过将针尖视为具有适当介电行为的额外单粒子，大致考虑了针尖与样品的相互作用。
