Study on interaction between poly(amidoamine) dendrimer and CdSe nanocrystal in chloroform

Aptamer-conjugated dendrimer-modified quantum dots for glioblastoma cells imaging

“…Dendrimers are a class of polymers with highly ordered structure. Our previous results demonstrate that the dendrimers functionalized nanomaterials such as CNTs, QDs and magnetic nanoparticles, markedly enhance the biocompatibility and cellular uptake of nanoparticles [7][8][9].…”

Simultaneous Detection of Multi-DNAs and Antigens Based on Self-Assembly of Quantum Dots and Carbon Nanotubes

“…The PL quenching data were analyzed by the Stern-Volmer equation (Fan and Jones Jr, 2006;Maurel et al, 2006;Pan et al, 2006c) :…”

“…14A. Alternatively, analyses of the PL data were performed using the double-logarithmic equation (Pan et al, 2006c). According to this approach, the QDs PL intensity scales with the CNT concentration ([CNT]) through the following equation: Table 1.…”

“…PL quenching is a process which decreases the intensity of the QD PL emission. QD PL quenching may occur by several mechanisms (Fan and Jones Jr, 2006;Pan et al, 2006c): (1) dynamic quenching, (2) static quenching, (3) quenching by energy transfer, and (4) charge-transfer reactions. In this paper we can draw the conclusion that QD quenching in the presence of CNTs is mainly caused by dynamic quenching and energy-transfer mechanisms (Clapp et al, 2004;Oh et al, 2005).…”

“…Given that the CNTs quenched the CdSe QDs, the interaction between CNTs and QDs must provide an alternative, nonirradiative decay path (Clapp et al, 2004;Cui et al, 2004b;Oh et al, 2005). It is believed that this nonirradiative decay path occurs because the electron affinity between the CdSe QDs and the CNTs is sufficiently different that it allows electron transfer from the QDs to the CNTs (Clapp et al, 2004;Pan et al, 2006c). In other words, formation of CNT-QD conjugates favors electron transfer from the quantum dots (donor) to the CNTs (acceptor) such that the excited electrons are accepted by the CNTs rather than being emitted as the PL peak.…”