Nielsen, Michael H.9; Li, Dongsheng10; Zhang, Hengzhong9; Aloni, Shaul11; Han, T. Yong-Jin12; Frandsen, Cathrine1; Seto, Jong13; Banfield, Jillian F.9; Coelfen, Helmut8; De Yoreo, James J.10
1 Department of Physics, Technical University of Denmark2 Experimental Surface and Nanomaterials Physics, Department of Physics, Technical University of Denmark3 University of California at Berkeley4 Pacific Northwest National Laboratory5 Lawrence Berkeley National Laboratory6 Lawrence Livermore National Laboratory7 Ecole Normale Superieure8 University of Konstanz9 University of California at Berkeley10 Pacific Northwest National Laboratory11 Lawrence Berkeley National Laboratory12 Lawrence Livermore National Laboratory13 Ecole Normale Superieure
Recent ex situ observations of crystallization in both natural and synthetic systems indicate that the classical models of nucleation and growth are inaccurate. However, in situ observations that can provide direct evidence for alternative models have been lacking due to the limited temporal and spatial resolution of experimental techniques that can observe dynamic processes in a bulk solution. Here we report results from liquid cell transmission electron microscopy studies of nucleation and growth of Au, CaCO3, and iron oxide nanoparticles. We show how these in situ data can be used to obtain direct evidence for the mechanisms underlying nanoparticle crystallization as well as dynamic information that provide constraints on important energetic parameters not available through ex situ methods.
Microscopy and Microanalysis, 2014, Vol 20, Issue 2, p. 425-436