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Showing 1 to 18 of 18 for “"Zinc telluride"”.
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Photoluminescence study of cadmium zinc telluride
… defects in bulk CdZnTe, (2) determining the zinc concentration in these crystals, and (3) identifying the nature of room-temperature PL. PL spectra at 5 K was used to determine the bandgap and hence the zinc concentrations. In the current state-of-the-art CZT grown for radiation detectors, it …
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The synthesis, characterisation and bioapplications of Novel Gold-Zinc Telluride Core-shell Nanoparticles
There is a growing demand for the development of innovative nano-drug delivery systems that can both target and improve cancer therapies more effectively than conventional chemotherapy. Novel Au-ZnTe nanoparticles was designed to support biocompatibility features that can be utilised for drug …
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Characterization of single-sided cadmium zinc telluride strip detectors for high energy astrophysics applications
<p>Cadmium zinc telluride (CdZnTe or CZT) was introduced as a new room temperature semiconductor detector due to its good energy resolution, high atomic number, high density and good stopping power in the early 1990s. UNH has focused on developing CZT strip detector designs for astrophysical …
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The growth and characterisation of zinc telluride for use as a nuclear radiation detector
As grown ZnTe is a highly conductive p-type semiconductor. In an attempt to produce highly resistive material suitable for fabrication into nuclear radiation detectors various dopants have been added during the Bridgman growth process to try to compenate the shallow acceptor defects that are …
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Modeling and control of cadmium zinc telluride grown via an electro-dynamic gradient freeze furnace.
… methods to grow bulk, single crystal cadmium zinc telluride (CZT) in a vertical Bridgman (VB) furnace. Additionally, we investigate new mathematical algorithms for improved solving capability of equations that describe such crystal growth systems. A two-dimensional crystal growth model for the …
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An investigation of mercury zinc telluride-cadmium telluride strained-layer superlattices grown by molecular beam epitaxy.
An investigation of mercury zinc telluride-cadmium telluride strained-layer superlattices grown by molecular beam epitaxy.
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Optimization Studies for the COBRA Neutrinoless Double-Beta Decay Experiment and Results from a Prototype
The COBRA experiment uses Cadmium Zinc Telluride: CZT) room-temperature semiconductor detectors to search for the neutrinoless double-beta decay of cadmium-116. While the experiment has produced globally competitive half-life limits with data from coplanar-grid CZT detectors, a future ton-scale …
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X-ray diagnostics for the Levitated Dipole Experiment
… four channel pulse height analyzer using cadmium zinc telluride detectors. In addition, a single sodium iodide detector, which views energies up to 3 MeV, measures the intensity of the hot electron population. The electron temperature may be inferred from the x-ray energy. X-ray measurements are …
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Purification of Cd, Zn and Te for CdZnTe growth
Purification of cadmium, zinc and tellurium was attempted to improve the quality of cadmium-zinc-telluride (CdZnTe) crystal growth. Specifically, vacuum distillation, zone refining and H[subscript]2 gas flow assisted zone refining were all investigated as methods to purify the constituent elements …
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Substrate cleaning using a remote hydrogen rf-plasma
… to the hydrogen plasma. For cadmium mercury telluride (CMT) and cadmium zinc telluride (CZT) the hydrogen plasma readily removes the oxide and an amorphous Te overlayer left behind by standard wet chemical processing of these substrates. Following the removal of these layers the H-plasma …
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Research and development of CdS/CdTe solar cells incorporating ZnTe layers.
… are cadmium sulfide (CdS), cadmium telluride (CdTe) and zinc telluride (ZnTe).All of these layers were obtained by growing them using electrodeposition in aqueous solutions. In this project, electrodeposition using 2-electrode system was employed to deposit all of the semiconductors. …
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Enhancing PEPT: high fidelity analysis techniques with augmented detection systems
… Previous work with a pair of pixelated cadmium zinc telluride (CZT) room temperature semiconductors (9680 pixels of 1.8 x 1.8 x 0.5 mm3) exhibited potential in micro-scale PEPT, but achievable location rates and field of view (FOV) were limiting. To address these issues, a modular bismuth …
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Enhancing PEPT: high fidelity analysis techniques with augmented detection systems
… Previous work with a pair of pixelated cadmium zinc telluride (CZT) room temperature semiconductors (9680 pixels of 1.8 x 1.8 x 0.5 mm3) exhibited potential in micro-scale PEPT, but achievable location rates and field of view (FOV) were limiting. To address these issues, a modular bismuth …
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A facile hybrid method to synthesize metal and metal chalcogenide nanoparticles using various capping groups
… method. Furthermore is the synthesis of zinc telluride (ZnTe) and cadmium telluride (CdTe) nanostructured materials also described. The nanomaterials are predominantly capped by organic ligands. The use of water soluble ligands such as triethanolamine (TEA) and cysteine is also reported. …
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Measurements and modeling of Lower Hybrid Driven fast electrons on Alcator C-Mod
… cross-section. Each chord ends at a cadmium zinc telluride (CZT) detector that detects individual x-ray photons as current pulses. The output from these detectors is shaped and digitized. Post-processing of the raw pulse train allows for flexible time and energy binning. Another diagnostic …
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Pulse-shape studies with coplanar grid CdZnTe detectors and searches for rare nuclear decays with the COBRA experiment
… searching for 0νββ-decays with cadmium zinc telluride (CZT) solid state detectors. The detector material CZT acts as a semiconductor at room temperature and contains intrinsically several candidates for rare nuclear transitions. The experiment is located at the LNGS underground facility …
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Novel etch studies and passivation techniques on InAs/GaSb superlattice based infrared detectors
… of SU-8 versus chalcogenide passivants (Zinc Sulfide, Ammonium Sulfide and Electro-chemical passivation i.e. deposition of pure sulphur) were carried out on InAs/GaSb SLS LWIR single-pixel detectors. Ammonium sulfide [(NH4)2S] treatment and electrochemical sulfur deposition (ECP) reduced …
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Heavy-metal-free colloidal nanocrystal heterostructures – synthetic chemistry and growth mechanisms
Building heterostructures of colloidal nanocrystals by bringing different components into contact can improve existing or impart novel properties, which enables applications as light emitters in already-commercialized and near-future products. However, the majority of the research has been based on …