Cadmium selenide, quantum dots

Surface effects on the properties of cadmium selenide quantum dots were investigated [90]. 

What are the most important differences between gold nanoparticles and cadmium selenide quantum dots ... 

Nanomaterials in the form of a colloidal solution or quantum dots are attributed to have a tremendous impact in analytical chemistry for their unique physical and chemical properties (Alivisatos 2004 Katz and Willner 2004). A different methodology has been adopted to analyse vitamin Bi spectro-fluorimetrically by using cadmium selenide quantum dots (CdSe QDs), cadmium telluride (CdTe) nanorods, and silica and gold nanoparticles. A fluorescence resonance Rayleigh scattering (RRS) method was applied for determining vitamin Bi at sub-nanomolar level (Liu et al. 2006). In this technique, vitamin Bi was mixed with acidic buffer and prepared gold nanoparticles. After incubation, the solution mixture was excited in synchronous mode to obtain RRS spectra. The RRS spectral intensity correlated with the concentration of vitamin Bi. 

Properties of Cadmium Selenide Quantum Dots. 1. Phys. Chem., 97 (34)8727- 8731 28. 

Figure 7.11 A schematic view of kem dependence on quantum dot size in the case of cadmium selenide...

For biological applications of quantum dots it is important to develop the technology for water soluble highly luminescent cadmium selenide nanocrystals. Obviously, the as-synthesized hydrophobic nanocrystals can not be utilized as fluorescent markers in immunoanalysis since such material must be water compatible [1-2]. 

This section will consider in greater detail specific examples of particular types of nanomaterials interacting with different media in the environment. The fate and transport of carbon-based nanomaterials, including carbon nanotubes and fuUerenes, in aqueous environments and the properties of commercial oxide nanoparticles that affect their removal in water will be discussed. Nanomaterial exposure to soils and porous media, focusing on transport and retention, as well as environmental interactions of cadmium selenide (CdSe) quantum dots with biofilms will be presented. These specific examples provide an idea of the types of environmental interactions that must be considered, and illustrate that environmental impacts of nanomaterials cannot be generalized, but rather, are dependent on properties of the material in question and the environment to which it is exposed or transported. 

Key words gas sensing, cadmium selenide (CdSe) quantum dots, photoluminescence, nanocomposites. 

The relationship between the size of the quantum dots and their electronic emission spectra has been elegantly shown with zinc selenide, cadmium sulfide, indium phosphide, and indium arsenide nanocrystals. The emission maxima of CdS, InP, and InAs quantum dots (Table 7.4) provide an excellent example of how these maxima are dependent on both... 

Trioctylphosphine oxide (TOPO) caps are used in quantum dots for LEDs moreover, the CdSe cores of these quantum dots can be obtained directly from cadmium selenide complexes as (12.401) [18,19]. Both TOPO and TOP can be used to produce various nanocrystals [20,21], Quantum dots of InP and GeP are being explored [22,23], Nickel nanoparticles, stabilised by TOPO, have been converted to Ni2P nanoparticles by the action of white phosphorus [21]. Highly luminescent nanocrystals of InP have been obtained. 

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