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Direct imaging of surface plasmon resonances on single triangular silver nanoprisms at optical wavelength using low-loss EFTEM imaging

机译:使用低损耗EFTEM成像在光波长下在单个三角形银纳米棱镜上直接成像表面等离振子共振

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摘要

Using low-loss energy-filtering transmission electron microscopy (EFTEM) imaging, we map surface plas-mon resonances (SPRs) at optical wavelengths on single triangular silver nanoprisms. We show that EFTEM imaging combining high spatial sampling and high energy resolution enables the detection and for the first time, to the best of our knowledge, mapping at the nanoscale of an extra multipolar SPR on these nanoparticles. As illustrated on a 276.5 nm long nanoprism, this eigenmode is found to be enhanced on the three edges where it exhibits a two-lobe distribution.
机译:使用低损耗能量过滤透射电子显微镜(EFTEM)成像,我们在单个三角银纳米棱镜上的光波长处绘制了表面等离子体共振(SPR)。我们证明,结合高空间采样和高能量分辨率的EFTEM成像能够进行检测,并且就我们所知,这是首次将纳米粒子上的纳米粒子映射到这些纳米粒子上。如在276.5 nm长的纳米棱镜上所说明的,该本征模在显示两个波瓣分布的三个边缘处得到增强。

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