Yi Cui develops nanomaterials and methods for studying their structure and behavior, with applications including lithium-ion batteries, catalysis and environmental technologies. His Stanford research description identifies this combination of material design and characterization.[ref] He also coauthored the indium tin oxide study cited here.[ref]
A useful geometric motivation for nanoscale design is that a sphere's surface-area-to-volume ratio is . Reducing its radius tenfold increases that ratio tenfold, changing how much material lies near an interface. In an electrode, small dimensions can also shorten transport distances, while a greater exposed surface can increase unwanted reactions. Useful material design must therefore test the complete device behavior rather than assuming smaller features improve every property.
Figure 1.
Portrait of Yi Cui
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