CdSe/ZnS core shell quantum dots

Dabbousi, B. O., Rodriguez-Viejo, J., Mikulec, F. V, Heine, J. R., Mattoussi, H., Ober, R., Jensen, K. F. and Bawendi, M. G. (1997) (CdSe)ZnS core-shell quantum dots synthesis and characterization of a size series of highly luminescent nanocrystallites. J. Phys. Chem. B, 101, 9463-9475. 

Hering, V. R., Gibson, G., Schumacher, R. I., Faljoni-Alario, A. and Politi, M. J. (2007). Energy transfer between CdSe/ZnS core/shell quantum dots and fluorescent proteins. Bioconjug. Chem. 18, 1705-8. 

Duong HD, Rhee JI. Use of CdSe/ZnS core-shell quantum dots as energy transfer donors in sensing glucose. Talanta 2007 73 899-905. 

Dabbousi B O ef a/1997 (CdSe)ZnS core-shell quantum dots synthesis and characterization of a size series of highly luminesoent nanoorystallites J. Phys. Chem. B 101 9463... 

The photoluminescence (PL) quantum yield of CdSe/ZnS core-shell quantum dots (QDs) strongly depends on ionic nature of molecules used as solubilizing agents and as molecular templates for further nanoengineering. Quantum yield of PL for initially bright cationic-capped QDs irreversibly decreases to zero. On the contrary, PL and photostability of partially quenched anionic-capped QDs are strongly enhanced upon interaction with cationic polyelectrolyte, which may be more preferable template for this reason. 

Fig. 30 Synthesis of (PyMMP-b-P2VP)-CdSe/ZnS core-shell quantum dots. Reproduced with permission from [107]...

R. Ober, K. E Jensen, M. G. Bawendi, (CdSe)ZnS Core-Shell Quantum Dots Synthesis and Characterization of a Size Series of Highly Luminescent Nanocrystallites. The Journal of Physical Chemistry B 1997,101,9463-9475. 

Anni M, Manna L, Cingolani R, Valerini D, Creti A, Lomascolo M Forster energy transfer from blue-emitting polymers to colloidal CdSe/ZnS core shell quantum dots. Appl Phys Lett 2004, 85(18) 4169—4171. 

Anikeeva PO, Madigan CF, Coe-Sullivan SA, Steckel JS, Bawendi MG, Bulo-vic V Photoluminescence of CdSe/ZnS core/shell quantum dots enhanced by... 

Fig. 8 (A) Functionalization of commercial CdSe/ZnS core-shell quantum dots (CS) with methyl ester N-acetyl-i-cysteine (CysP) and the proposed binding of CysP to the CS surface (B) Proposed interaction between the CysP ligand of CS CysP and the drug (C) Structure of the drugs studied herein. Perez Prieto eta/. Copyright 2013, John Wiley and Sons,...

Many inorganic nanocrystals, including CdSe/ZnS core/shell quantum dots and nanocrystals doped with Ce as luminescent centers (e.g., YaOarCe, LaP04 Ce), were synthesized as described above. With particles sizes below 5 nm, narrow size distribution, and high crystallinity, they demonstrated high light yields, a desirable property for efficient scintillators. 

Figure 31 Emission intensity of a solution of CdSe-ZnS core-shell quantum dots (0.8 pM, 300 pL, CHCI3, 20 °C, A.ex = 430 nm, Xsm = 555 nm) with (a) and without (b) 3 on their surface and BU4NCI (1 M, 50 pL, dichloroethane) after treatment with sodium phosphate buffer (500 pL) and dilution with CHCI3 (4.3 mL). Photographs of solutions of CdSe-ZnS core-shell functionalized quantum dots (0.8 pM, 300 pL, CHCI3) in presence of BU4NCI (1 M, 50 pL, dichloroethane) under ultraviolet illumination after treatment with sodium phosphate buffer (500 pL) at the pH values (I-III) indicated in the plot. (Reproduced with permission from Ref. 66. 2006, American Chemical Society.)...

Although many of the surface dendrimer amines are occluded by the gold or quantum dot nanoparhcles, silica condensahon still occurs. In fact, the CdSe/ZnS core shell quantum dots with negahvely charged surface carboxylates were encapsulated with 99% efficiency, which suggests that the electrostatic attraction between the quantum dots and the templates was sufficient for encapsulation of these materials [69]. 

Image of the energy of the plasmon resonance for a multidot sub monolayer consisting of three different types of CdSe/ZnS core/shell quantum dots with emission (in solution) at 536 (blue), 557 (green) and 614 (red) nm. (b) Tunneling luminescence spectra showing the resonances in the extinction of the free plasmon for the three different types of dot. (c) A line scan over the image (a) demonstrates a resolution better than 10 nm. 

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