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Cadmium Telluride Quantum Dots: Advances and Applications by John Donegan, Yury Rakovich

By John Donegan, Yury Rakovich

In the final 20 years, semiconductor quantum dots—small colloidal nanoparticles—have garnered loads of medical curiosity due to their specified houses. between nanomaterials, CdTe holds designated technological significance because the in simple terms identified II–VI fabric which may shape traditional p–n junctions. This makes CdTe extremely important for the improvement of novel optoelectronic units comparable to light-emitting diodes, sun cells, and lasers. additionally, the call for for water-compatible gentle emitters and the most typical organic buffers supply CdTe quantum dots fields a veritable part in biolabeling and bioimaging.

Cadmium Telluride Quantum Dots: Advances and Applications makes a speciality of CdTe quantum dots and addresses their synthesis, meeting, optical homes, and functions in biology and medication. It makes for a really informative interpreting for someone eager about nanotechnology and also will profit these scientists who're searching for a accomplished account at the present kingdom of quantum dot–related research.

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Uspekhu, 33, pp. 974–1005. 16. , Giles, N. , and Summers, C. J. (1994). Roomtemperature band-edge photoluminescence from cadmium telluride, Phys. Rev. B, 49, pp. 1668–1676. 17. , and Hlídek, P. (2006). Free-exciton absorption in bulk CdTe: temperature dependence, Phys. Stat. Sol. (b), 243, pp. 494–501. 18. Pässler, R. (2003). Semi-empirical descriptions of temperature dependences of band gaps in semiconductors, Phys. Stat. Sol. (b), 236, pp. 710–728. 19. Varshni, Y. P. (1967). Temperature dependence of the energy gap in semiconductors, Physica, 34, pp.

The newly developed facile one-pot synthesis provides a wide range of alloyed TGA stabilized CdxHg1–xTe NC batches possessing a strong PL within the spectral range of 640 to 1600 nm (see Fig. 17b) [22]. The recipe is very similar to the synthesis of pure CdTe and includes partial replacement of the Cd salt by the Hg precursor. In contrast to the incorporation technique, the nucleation and the growth of alloyed NCs using the 47 48 Aqueous Synthesis of Colloidal CdTe Nanocrystals addition of only a small amount of the mercury precursor leads to a significant decrease of the bandgap and correspondingly to a shift of the PL to longer wavelengths.

Aqueous CdTe NCs being functionalized directly in the synthesis via application of various thiol stabilizers are off-the-shelf building blocks for the fabrication of different hybrid structures utilizing assembly approaches. Assembly of nanoparticles into superstructures of greater complexity is a necessary step in the utilization of nanomaterials, which enhances the spectrum of their properties. It is believed that the complexity of nanoparticulate architectures will increase not only with respect to spatial dimensions but also along the temporal coordinate, leading to dynamic nanometer-scale systems [89].

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