Cyclodextrin (CD) capped CdTe quantum dots (QDs) were prepared with uniform dimension (average diameter ∼5 nm) and high quantum yield (ca. 65%). By taking advantage of the inclusion complexation of CD, β-CD-CdTe QDs exhibited strong fluorescence quenching in a linear relationship with the concentration of o-, m- and p-nitrophenol in the range of 20-100 μM. The detection limit reached 0.05 μM fo...

A bulk single crystal sample of cadmium telluride (CdTe) was irradiated with a ~3 mJ/cm infrared femtosecond laser and analyzed with time-resolved X-ray diffraction (XRD) performed on an in-air tabletop designed for an extremely short pulsed X-ray source. The integrated intensity of Kα XRD lines from the CdTe (111) plane was decreased by 4%–5% in the time scale of ~200 ps. The changes in integr...

A significant challenge exists in probing the transport behavior of chemically modified single-walled carbon nanotubes (SWNTs). Thin films of SWNTs offer one facile approach to integration of these materials into electronics and sensing applications. Data on bulk resistivities of ‘bucky paper’ films created from HiPco SWNTs that were initially ozonized and subsequently decorated with CdTe quant...

Quantum dots (QDs), as novel bioimaging and drug delivery agents, are generally introduced into vascular system by injection, and thus directly exposed to vascular endothelial cells (ECs). However, the adverse effects of QDs on ECs are poorly understood. In this study, employing human umbilical vein ECs (HUVECs), we investigated the potential vascular endothelial toxicity of mercaptosuccinic ac...

Nanoparticles were recently reported to be able to improve both efficiency and specificity in polymerase chain reaction (PCR). Here, CdTe QDs were introduced into multi-PCR systems. It was found that an appropriate concentration of CdTe QDs could enhance the performance of multi-PCR by reducing the formation of nonspecific products in the complex system, but an excessive amount of CdTe QDs coul...

We report here on the direct observation of distinct two-photon transition channels in glutathione-capped (GSH) CdTe quantum dots (QDs) in a very strong confinement regime. CdTe-GSH QDs with different average diameters (2.5, 3.0, and 3.3 nm) were synthesized through the one-pot method and their two-photon absorption (2PA) spectrum determined by a femtosecond wavelength-tunable Z-scan. Our resul...

Рассматривается влияние облучения γ-квантами на механизм переноса тока в структуре Al-p-CdTe-Mo с протяженной базой (w = 120 μm). Показано, что прямая ветвь ВАХ структуры до и после описывается степенной зависимостью J ~ Vβ двумя участками: участке D β 1.2, a F 3.45. Определенная из прямой ветви величина удельного сопротивления ρ 2.1×107 Ωcm слоя p-CdTe хорошо соответствует величине исходной пл...

The purpose of this research is to evaluate new materials as gain media for midinfrared (MIR) solid-state lasers. MIR lasers are of significant current interest for several applications including laser remote sensing of bio-chemical agents, medical surgery, fundamental spectroscopy, and biophotonics. In this project, Cobalt (Co) doped ZnSe windows and CdTe crystals were investigated as MIR lase...

glucose, as the major energy source in cellular metabolism, plays an important role in the natural growth of cells. herein, a simple, rapid and low-cost method for the glucose determination by utilizing glucose oxidase and cdte/thioglycolic acid (tga) quantum dots (qds) on a thin layer chromatography (tlc) plate has been described. the detection was based on the combination of the glucose enzym...

The photophysical properties of 2.3 nm thioglycolic acid (TGA) coated CdTe quantum dots (QDs) prepared by a reflux method have been studied in the presence of cationic meso-tetrakis(4-N-methylpyridyl) zinc porphyrin (ZnTMPyP4). Addition of the CdTe QDs to the porphyrin in H(2)O results in a marked red-shift and hypochromism in the porphyrin absorption spectrum, indicative of a non-covalent bind...