quantum dots – Page 2 – TechConnect Briefs

Quantum-Confinement Effects on Oscillator Strength in ZnO Quantum Dots

Tit N., UAE University, AE

We present a theoretical investigation of the quantum confinement effects (QC) on the electronic and optical properties of ZnO quantum dots (QDs) embedded in MgO matrix. The latter material acts a huge barrier for both [...]

Energy and Charge Transfer between Quasi-zero-dimensional Nanostructures

Kral K., Mensik M., Institute of Physics, Academy of Sciences of Czech Republic, CZ

Theory is presented of the electronic excitation and electronic charge transfer between quantum dots. Kinetic equations describing this irreversible transfer are developed using quantum transport approach. The non-adiabatic property of the electron coupling to the [...]

Synthesis of Novel Functionalized-Graphene/Quantum Dots Hybrid System for Solar Cells Application

Babkair S.S., Khan M.T., Azam A., kau, SA

In the recent years functionalize graphene and inorganic quantum dots have emerged as strong acceptor material for the organic solar cells. But the power conversion efficiency of the devices based on these materials is still [...]

Synthesis of Novel Functionalized-Graphene/Quantum Dots Hybrid System for Solar Cells Application

Babkair S.S., Khan M.T., Azam A., kau, SA

In the recent years functionalize graphene and inorganic quantum dots have emerged as strong acceptor material for the organic solar cells. But the power conversion efficiency of the devices based on these materials is still [...]

tunneling rate in chaotic quantum system

Filikhin I., Matinyan S.G., Vlahovic B., North Carolina Central University, US

We study electron spectra and electron tunneling in double quantum systems: quantum wells (QWs), quantum dots (QDs) and quantum rings (QRs). We especially study the relation between their chaotic properties and tunneling. In particular we [...]

Microwave Initiated Nucleation for the Synthesis of High Quality Nanocrystalline Quantum Dot Materials

Kim K-J, Chang C.H., Haben P.M., Peterson D.A., Novet T.E., Schut D.M., Shoei Electronic Materials, Inc., US

The colloidal synthesis of nanoparticles, specifically quantum dots, may occur through either a kinetically dominated process where nucleation proceeds rapidly followed by growth via coalescence of nucleates to form larger nanoparticles, or through a thermodynamically [...]

Synthesis and Characterization of Copper (i) Oxide and Zinc Oxide Quantum Dot Materials and the Development of New Fluorescent Fibre Composites

Johnston J.H., Zeller A.J., Victoria University of Wellington, NZ

New fluorescent composites of Cu2O and ZnO quantum dots with wool and paper fibres for potential use in photoluminescent fabrics, packaging and labelling papers, have been developed. The fluorescent colours can be tuned by varying [...]

Bio-imaging of colorectal cancer models using a CK19-bioconjugated Quantum Dot Nanoprobe

Gazouli M., Nikiteas N., Anagnou NP., Kelekis N., Efstathopoulos E., School of Medicine University of Athens, GR

The aim of the study was to develop and validate a QD-nanoprobe for the detection of CK19 protein for in vivo colorectal cancer molecular targeting. QDs with a maximum emission wavelength of 655 nm, were [...]

Peptide-Mediated Cellular Delivery of Semiconductor Quantum Dots

Gemmill K., Delehanty J., Stewart M., Susumu K., Oh E., Deschamps J., Blanco-Canosa J., Dawson P., Huston A., Medintz I., US Naval Research Laboratory, US

Semiconductor CdSe/Zn quantum dots are ideal materials for biological imaging due to their superior optical properties over fluorescent proteins and organic dyes. However, cytosolic cellular delivery of quantum dots has been hindered by endosomal sequestration [...]

Effects of CdTe QDs on protein structural changes

Ma X., Liang X., Liu L., Hu X., Fan J., Northwest University, CN

The nano-scale material, quantum dots (QDs), has been widely used in biological labels, imaging of fixed cells and tissues due to their excellent properties, such as small size, large surface area, good photostability, and negligible [...]