Making a nano-movie using liquid-cell transmission electron microscopy

Published in Chemistry
Making a nano-movie using liquid-cell transmission electron microscopy
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It all started when we got together with my colleague Kathryn Grandfield and we talked about how important it would be to apply liquid cell transmission electron microscopy (TEM) to study relevant biological systems. Calcium phosphate biomineralization immediately came to mind. This is an essential process in the formation of bones and teeth. It is important in pathologicalĀ calcificationĀ like the formation of kidney stones, and knowing more about the process can guide us in engineering bio-inspired materials.

In the work published in Communications Chemistry, we used liquid cell TEM to study calcium phosphate mineralization from stimulated body fluid. Under low-beam imaging conditions, we were able to create a nano-movie that showed the structural evolution of calcium phosphate, directly in liquid, with nanoscale spatial resolution and sufficient temporal resolution. The nano-movie demonstrated that calcium phosphate mineralizes through a non-classical pathway, by the formation of pre-nucleation particles and aggregative growth forming chain-like or branched morphologies. This study demonstrates the feasibility of studying biological processes in their native liquid environment with nanoscale resolution using liquid-cell TEM

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Physical Sciences > Chemistry

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