Colloidal nano-MOFs nucleate and stabilize ultra-small quantum dots of lead bromide perovskites

Carrier relaxation dynamics in lead sulfide colloidal quantum dots.

We report transient absorption saturation measurements on lead sulfide colloidal nanocrystals at the first and second exciton energies and fit the results to a model incorporating intraband and interband relaxation processes. We study in detail the Auger recombination from the first excited state, which takes place when more than one electron-hole pair is excited in a dot. We find an Auger coef...

Spin-related transport in ultra small Si quantum dots

We investigated electron transport through ultra small Si quantum dots. We found that the B-dependence of energy levels is dominated by the Zeeman shift, allowing us to measure the spin difference between two successive ground states directly. In some dots the number of electrons N in the dot can be tuned starting from zero, and the total spin of the dot can be mapped as a function of N and B. ...

Capacity of nano-reactors of AOT micro-emulsions to form and sustain ultra small semiconductor quantum dots.

Microemulsions (MEs) are increasingly being used as nano-reactors for the formation and synthesis of nanoparticles or quantum dots (QDs). In this paper, we study the capacity of aqueous nanoreactors of AOT microemulsions for the formation of ultrasmall semiconductor QDs by fixing w = ([H2O]/[AOT]) and varying the concentration of CdS up to 100 mM. The CdS QDs in the MEs are evaluated using UV-v...

Colloidal quantum dots: synthesis, properties and applications

development of different optical methods for determination of glucose using cadmium telluride quantum dots and silver nanoparticles

a simple, rapid and low-cost scanner spectroscopy method for the glucose determination by utilizing glucose oxidase and cdte/tga quantum dots as chromoionophore has been described. the detection was based on the combination of the glucose enzymatic reaction and the quenching effect of h2o2 on the cdte quantum dots (qds) photoluminescence.in this study glucose was determined by utilizing glucose...