Semiconductor nanoparticles, such as quantum dots (QDs), were used to carry out experiments in vivo and ex vivo with Trypanosoma cruzi. However, questions have been raised regarding the nanotoxicity of QDs in living cells, microorganisms, tissues and whole animals. The objective of this paper was to conduct a QD nanotoxicity study on living T. cruzi protozoa using analytical methods. This was a...

To minimize the side effects and the multidrug resistance (MDR) arising from daunorubicin (DNR) treatment of malignant lymphoma, a chemotherapy formulation of cysteamine-modified cadmium tellurium (Cys-CdTe) quantum dots coloaded with DNR and gambogic acid (GA) nanoparticles (DNR-GA-Cys-CdTe NPs) was developed. The physical property, drug-loading efficiency and drug release behavior of these DN...

Hybrid CdZnTe and CdTe pixel detector arrays with 50 50 micron pixel sizes that convert x-rays directly into charge signals are under development at NOVA for applications to digital mammography. CdZnTe and CdTe have superior x-ray quantum efficiency compared to either emulsion-based film, phosphor-based detectors or other low-Z, solid-state detectors such as silicon. In this paper, latest resul...

Advisor Department Head iii ABSTRACT OF DISSERTATION Impact of Lifetime Variations and Secondary Barriers on CdTe Solar-cell Performance The thin-film CdTe solar cell (generally n-CdS/p-CdTe) is one of the leading candidates for terrestrial photovoltaic applications due to its low cost and high efficiency. However, compared with single-crystal cells of comparable band gap, there remains a signi...

Quantum dots (QDs) have become an important photonic tool in the past two decades due to their unique properties, such as high chemical stability, resistance to photodegradation, and readily tunable optical properties.1-3 QD colloids are often prepared using organometallic routes at high temperature.4-6 The most widely used surface-capping ligands are trioctylphosphine/trioctylphosphine oxide (...

This research has investigated epitaxial InSb, CdTe, MgCdTe, and CdTe/MgCdTe double heterostructures grown on InSb (100) substrates using molecular beam epitaxy. State-ofthe-art materials quality has been successfully achieved in all of these materials, which have demonstrated record narrow X-ray diffraction line-widths, ultra-low defect density, and record long minority carrier lifetime of ove...

We have investigated chloroform solutions containing tris(4,7-diphenyl-1,10-phenanthroline) ruthenium(II) and CdTe nanocrystal quantum dots (5.6 nm diameter). The electronic levels of these two components are such that the Ru complex can act as an energy donor towards the quantum dot, which can thus behave as an energy acceptor. Steady-state and time-resolved spectroscopic experiments indicate ...

Nanoscale organic-inorganic hybrid materials were prepared from two highly fluorescent building blocks: CdTe nanowires (NWs) as an energy acceptor, and a rigid rod-like and water soluble poly(p-phenyleneethynylene) (PPE) as a donor. The PPE was covalently bonded to the CdTe by traditional amide chemistry. Two different orientations, parallel and perpendicular, of PPE to CdTe NW were achieved by...