Lattice waves with high frequency and low frequency are supposed to exist in nanostructures, I wonder whether we can distinguish the low-frequency ones from the others and observe them directly.
If you know the elastic properties and particle size you can try to estimate the corresponding phonon frequencies. These will be
Hi, Doc Walther, Thank you very much for your answer.
I don't really know much about experiments and related devices, but do you mean we can directly see the vibration whose amplitude is around 1nm or whose energy is larger than 0.01eV with the help of electron microscopy?
in certain cases, yes. For mechanical vibration experiments with nanowires, see the papers by ZL Wang from Georgia Tech. For plasmon imaging in EFTEM, see the papers by W Sigle from Stuttgart. For plasmon imaging in STEM-EELS see the papers by M Tence from Orsay.
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