Surface functionalization of cadmium sulfide quantum-confined nanoclusters. 4. Formation and reactivity of an aniline surface quantum dot

Chain Packing Analysis of the Passivating Layer on Nanocrystalline Quantum Dot Surfaces

“…The constrained surfaces of these materials should exhibit a varied order/ disorder behavior for the surface-passivated layer which correlates with passivant chain length, chain packing, and QD size. Recent efforts to understand the molecular level interactions and reactivity in nanoscale materials include small-molecule surface binding effects on photoluminescence, , NMR of the organic passivating layer, , varying of the capping layer moiety, − influence of the quantum dot shape, and vibrational and thermotropic analysis of materials. − These studies indicate that the primary function of the capping moiety for the QD is minimization of particle agglomeration arising from Ostwald ripening, as well as passivation of the surface electronic states via surface reconstruction of dangling bonds at the solution/nanoparticle interface. Because of the large surface-to-volume ratios in these materials, the molecular level interactions of the passivant layer may also dominate particle−particle interactions in self-assembled three-dimensional structures.…”

Novel Molecular Recognition via Fluorescent Resonance Energy Transfer Using a Biotin−PEG/Polyamine Stabilized CdS Quantum Dot

“…Several approaches to the PL activation were reported, which were based on the confinement of charge carriers within the QD cores , In the case of the QD stabilization by the PAMA homopolymer, the amino groups in the side chain of PAMA were used not only for coordination on the CdS surface but also for the solubilization in the aqueous phase. Thus, PAMA homopolymer is softly bound on the surface of the CdS QD.…”