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Template epitaxial growth of thermoelectric Bi/BiSb superlattice nanowires by charge-controlled pulse electrodeposition

This was international collaborative work with leading research centre (Chinese Academy of Sciences in Hefei) funded by the Royal Society. By optimising the processing parameters, epitaxial growth of semimetal Bi superlattice nanowires (SLNW) with preferred orientation and sharp segment interface were grown using charge controlled electrodeposition. By controlling the pulse time, ionic transport could be tuned to dominate the growth and produce extremely homogeneous layered growth. Electrical characterisation indicated very good conductance properties, especially smaller bilayer thicknesses. The technique is of significant use in SLNW preparation where high thermoelectric performance is desirable.