Quantum dots (QDs) for photonic applications

Applications of Quantum Dots in Cell Tracking

Tracking cells after transplantation is always one the main concerns of researchers in the field of regenerative medicine. Finding a tracer with long stability and low cytotoxicity can be considered as a solution for this issue. Semiconductor nanocrystals, also called quantum dots (QDs), have unique photophysical properties which make them as suitable candidate in this setting. Broad-range exci...

CdTe/CdS core shell quantum dots for photonic applications

In this work, we show a simple experimental procedure to obtain CdTe/CdS (diameterZ3–7 nm) core shell nanocrystals in colloidal suspension. The nanocrystals were characterized by transmission electronic microscopy and powder X-ray diffraction analysis. The optical properties were determined by electronic absorption, excitation and emission spectroscopies and are discussed in terms of chemical c...

Luminescent Semiconductor Quantum Dots (QDs) and Their Nanoassemblies as Bioprobes

ii ACKNOWLEDGMENTS This dissertation is dedicated to my wife Zhen Ling and my son Shidong Chen. Without their love, encouragement, help and understanding, it would not be possible for me to complete my Ph.D studies. I would like to thank my research advisor Professor Zeev Rosenzweig for the generous support of my research work for the past four years and for his continuous advices, helpful disc...

Quantum dots in photonic crystal cavities

Photochemical incorporation of silver quantum dots in monodisperse silica colloids for photonic crystal applications.

We developed a novel method to fabricate nanocomposite monodisperse SiO2 spheres (approximately 100 nm) containing homogeneously dispersed Ag quantum dots (approximately 2 to 5 nm). The inclusion morphology is controlled through the timing of the photochemical reduction of silver ions during hydrolysis of tetraethoxysilane in a microemulsion. Depending on the timing, Ag quantum dots can be dire...