We report the synthesis of long narrow gold nanocrystals and the study of their vibrational dynamics using inelastic light-scattering measurements. Rich experimental spectra are obtained for monodomain gold nanorods and pentagonal twinned bipyramids. Their assignment involves diameter-dependent nontotally symmetric vibrations which are modeled in the framework of continuum elasticity by taking into account simultaneously the size, shape, and crystallinity of the nanocrystals. Light scattering by vibrations with angular momenta larger than 2 is reported. It is shown to increase with the ratio of the nanocrystals diameter to the interparticle separation. It originates from the plasmonic coupling due to the self-assembly of the nanocrystals after deposition.

中文翻译：

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长窄金纳米晶体的非弹性光散射：大小，形状，结晶度和组装问题。

我们报告合成的长窄金纳米晶体和使用非弹性光散射测量对其振动动力学的研究。获得了单畴金纳米棒和五边形双联双锥体的丰富实验光谱。它们的分配涉及与直径有关的非完全对称振动，该振动是在同时考虑纳米晶体的大小，形状和结晶度的情况下，在连续弹性的框架内建模的。据报道，由于角矩大于2的振动而导致的光散射。它显示出随着纳米晶体直径与颗粒间分离的比率增加。由于沉积后纳米晶体的自组装，它源自等离子体耦合。