Quantum dots image

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Fig. 56. TEM images of DNA-linked gold network (a) an assembly of 8 and 30 nm gold particles (b) higher resolution image of (a) (c) control experiment without DNA (d) HR-TEM image of a portion of a hybrid Au/quantum dot (QD) assembly. The lattice fringes of the QDs, which resemble fingerprints, appear near each Au nanoparticle, (e) A satellite structure formed using a 60-fold excess of the 8 nm particles. Reproduced with permission from Ref. (185). Copyright 2000, American Chemical Society.

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Since highly fluorescent water soluble gold clusters have been synthesized by various routes, they can be used in biology-related experiments such as imaging. These clusters may possess additional benefits over organic fluorophores and fluorescent semiconductor quantum dots. Organic fluorophores are prone to photobleaching,... 

Fig. 9.21 In vivo images of MWCNTs-QDs (0.5 tg ml-1 in PBS) in mice injected at different body regions a) MWCNTs attached with CdSe/Zns quantum dots (emission of 600 nm) at middorsal location b) MWCNTs attached with CdSe/ZnS quantum dots at ventrolateral locations, the suspensions were diluted by PBS at various concentrations as indicated (A through E) c) MWCNTs attached with InGaP/ZnS quantum dots (emission of 680 nm, 0.25 jj,g ml-1 in PBS) in liver, kidney, and leg muscles. All images were taken successfully in 2 min under epi-UV illuminator with excitation of 435nm. (Shi et al. 2007). Published with permission from Wiley-VCH see Color Plates)...

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