Engineered nanoparticles are often deliberately placed at interfaces (e.g. on fabrics, devices or surfaces) or deposited to form interfaces through adsorption or agglomeration.  Once at an interface, a nanoparticle may continue to transform and that transformation may be altered by its presence at the interface.  To understand the interfacial transformations of nanoparticles, we have prepared a series of metal and metal oxide nanoparticles with well-defined organic shell coatings.  The structures of these materials, and the way in which they are attached or assembled at an interface, are designed to enable us to elucidate how their structural features and environmental conditions influence the transformations of the nanoparticles. We have developed analytical approaches to examine the reactivity of the ligand shells and inorganic cores at interfaces using a combination of transmission electron microscopy, x-ray photoelectron spectroscopy and thermal analysis methods.  Here we report the transformations of metal and metal oxide nanoparticle cores and the influence of the ligand shell on those processes.

Transformations of ligand-protected inorganic nanoparticles at interfaces

248th National Meeting (2014)

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