This work demonstrates the systematic development and characterization of water-soluble one-dimensional
nanorods of CdTe (QR) with the assistance of a mixed ligand system, namely, a combination of
2-(dimethylamino)ethanethiol and cysteine, that both serve as surface stabilizers. Their characterization has
been accomplished by means of a wide range of microscopic and photophysical techniques. The corresponding
three-dimensional quantum dots of CdTe (QD) emerged as important reference systems, especially for the
different photophysical assays. The latter were exclusively formed when just 2-(dimethylamino)ethanethiol
was used as surface stabilizer. A maximum photoluminescence quantum yield of 25% was estimated for QR
samples that were refluxed in water for approximately 11 h. Such remarkably high quantum yields, which
are appreciably higher than what is seen for the analogous QD, point to a successful control over defects,
trapping states, etc. In line with this trend is the observation that the excited-state lifetime of the QR is longer
than in analogous QD.
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