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| - Determination of the Rod−Wire Transition Length in ColloidalIndium Phosphide Quantum Rods
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| Abstract
| - Colloidal InP quantum rods (QRs) having controlled diameters and lengths are grown by thesolution−liquid−solid method, from Bi nanoparticles in the presence of hexadecylamine and otherconventional quantum dot surfactants. These quantum rods show band-edge photoluminescence after HFphotochemical etching. Photoluminescence efficiency is further enhanced after the Bi tips are selectivelyremoved from the QRs by oleic acid etching. The QRs are anisotropically 3D confined, the nature of whichis compared to the corresponding isotropic 3D confinement in quantum dots and 2D confinement in quantumwires. The 3D−2D rod−wire transition length is experimentally determined to be 25 nm, which is about 2times the bulk InP exciton Bohr radius (of ∼11 nm).
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