Flow
Alignment of Nanowires
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Scale bar is 2 µm
InP |
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- Arrays of NWs can be assembled by passing ethanol suspensions of the NWs through
fluidic channel structures formed between a poly(dimethylsiloxane) mold and
a flat substrate.
- The channel flow near the substrate surface resembles a shear flow, and linear shear force aligns the NWs
in the flow direction before they are immobilized on the substrate.
- With increasing flow rates, the angular distribution with respect to the flow direction narrows.
- Multiple crossed NW arrays can be obtained by changing the flow
direction sequentially in a layer-by-layer assembly process.
