As we saw in the previous post, nano-structures may not conform to our macro expectations. It is important therefore to be able to view both on the nano-length scale and on the ultra-short time scale, preferably simultaneously.
In November I highlighted an achievement in ultrafast electron microscopy (see “Two-photon ultrafast electron microscopy“). The same group at CalTech has now published a very readable perspective on the whole field of ultrafast electron diffraction, crystallography, and microscopy. I highly recommend the article, which is (at least for now) open access.
Ref.: D Shorokhov and A H Zewail, “Perspective: 4D ultrafast electron microscopy — Evolutions and revolutions”, Journal of Chemical Physics 144, 080901 (2016).