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Controlled and reproducible synthesis of tailored materials is essential in many fields of nanoscience. In order to control synthesis, there must be a fundamental understanding of nanostructure evolution on the length scale of its features. Growth mechanisms are usually inferred from methods such as (scanning) transmission electron microscopy ((S)TEM), where nanostructures are characterized after growth is complete. Such post mortem analysis techniques cannot provide the information essential to optimize the synthesis process, because they cannot measure nanostructure development as it proceeds in real time. This is especially true in the complex rheological fluids used in preparation of nanoporous materials. Here we show direct in situ observations of synthesis in a highly viscous lyotropic liquid crystal template on the nanoscale using a fluid stage in the STEM. The nanoparticles nucleate and grow to ∼5 nm particles, at which point growth continues through the formation of connections with other nanopar...
| Authors: | Lucas R. Parent; David B. Robinson; Taylor J. Woehl; William D. Ristenpart; James E. Evans; Nigel D. Browning; Ilke Arslan | |
| Journal: | ACS Nano | |
| Year: | 2012 | |
| DOI: | 10.1021/nn300671g | |
| Publication date: | 24-04-2012 |
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