quantum dot – Page 4 – TechConnect Briefs

Fabrication of Photonic Transfer DNA-Quantum Dot Nanostructures

Heller M.J., Sullivan B., Dehling D., University of California San Diego, US

Fabrication of Photonic Transfer DNA-Quantum Dot Nanostructures M. J. Heller, B. Sullivan and D. Dehling University of California San Diego; Departments of Bioengineering/Electrical and Computer Engineering; PFBE Bldg, Rm 429: La Jolla CA 92093; 858-822-5699; [...]

High Speed Processing of Large Amount of Bio-Nano Imaging Data for Cancer Research

Wang G., Wang M., Wang G., Wang M., Georgia Institute of Technology and Emory University, US

Bionanotechnologies such as quantum dots (QDs) or molecular beacons have generated huge amount of nanoimaging data to study in vitro and in vivo cell behavior for disease early diagnosis and therapeutic drug target. These images [...]

Liposome Encapsulation of Fluorescent Nanoparticles: Quantum Dots and Silica Nanoparticles

Chen C-S, Yao J., Durst R.A., Cornell University, US

Quantum dots (QDs) and silica nanoparticles (SNs) are new classes of fluorescent probes that overcome the limitations encountered by organic fluorophores in bioassay and biological imaging applications. We encapsulated QDs and SNs into liposomes by [...]

Single-Dot Spectroscopy of Low Density GaAs Quantum Dots Grown by Modified Droplet Epitaxy

Yamagiwa M., Minami F., Koguchi N., Tokyo Institute of Technology, JP

Low density GaAs/AlGaAs quantum dots (QDs) have been fabricated using Modified Droplet Epitaxy (MDE) [1] for the spectroscopic study of single QDs using microphotoluminescence (µPL). In µPL measurements, the excitation/observation area is focused by a [...]

Conjugation of DNA to Streptavidin-coated Quantum Dots for the Real-time Imaging of Gene Transfer into Live Cells

Kim J.K., Lim S.H., Lee Y., Shin Y.S., Chung C., Yoo J.Y., Chang J.K., Digital Bio Technology, Co, KR

We have developed the method for the conjugation of biotinylated DNA to streptavidin-coated quantum dots (QDs). QD-DNA conjugates and a highly sensitive fluorescence imaging technique are adopted to visualize gene transport across the membrane of [...]

Spin-orbit Interaction and Energy States in Nanoscale Semiconductor Quantum Rings

Li Y., Natl Nano Device Labs & Natl Chiao Tung Univ, TW

We investigate the effect of spin-orbit interaction on the electron energy states in nanoscale semiconductor quantum rings. The effective one-band Hamiltonian approximation with the spin-dependent Ben Daniel-Duke boundary conditions is formulated and solved numerically. Due [...]

Transition of the Ground State in a Coupled N-layer Quantum Dot

Xie W., Guangzhou University, CN

There has been growing interest in the physics of quantum dots (QDs) in recent years because of the rapid development of fabrication technology. Most theoretical and experimental studies have been so far focused on the [...]

Study of Alloy Disorder in Quantum Dots through Multi-million Atom Simulations

Klimeck G., Oyafuso F., Boykin T.B., Bowen R.C., von Allmen P., NASA, Jet Propulsion Laboratory, US

A tight binding model which includes s, p, d and s* orbitals is used to examine the electronic structures of an ensemble of dome-shaped In0.6Ga0.4As quantum dots. Given ensembles of identically sized quantum dots, variations [...]

Optical Characteristics of InAs Quantum Dots influenced by AlGaAs/GaAs Superlattice Barriers

Choi H., Jeong Y., Park Y., Lee J., Leem J-Y, Leem J-Y, Jeon M., Jeong Y., Inje University, KR

We investigated the effect of AlGaAs/GaAs superlattice barriers on the optical properties of InAs quantum dots (QDs) by using photoluminescence (PL) spectroscopy. The samples used in the present work were grown by molecular beam epitaxy [...]

Simulation of Self-Assembly of Quantum Dots in Superlattices

Liu P., Wang Y.Y., Lu C., Institute of High Performance Computing, SG

The self-organization of three dimensional quantum dot superlattices that spontaneously form during heteroepitaxial growth is investigated by using a three dimensional kinetic model. The model predictions show that the multilayer arrays of quantum dots can [...]