Patent ID: 8912545

Claim:
A method for fabricating a nanowire-based semiconductor structure, comprising: forming a first nanowire with a first polygon-shaped cross-section having a first number of sides; forming a second nanowire by depositing a semiconductor layer directly on all surface of the first nanowire, such that the semiconductor layer of the second nanowire has a second polygon-shaped cross-section containing the first polygon-shaped cross-section of the first nanowire, the second polygon-shaped cross-section having a second number of sides, the second number being greater than the first number; and forming a third nanowire by annealing the second nanowire, comprising the semiconductor layer and the first nanowire, to remove a substantial number of vertexes of the second polygon-shaped cross-section, wherein the third nanowire has a non-polygon-shaped cross-section corresponding to the second polygon-shaped cross-section.