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Design and Implementation of a Facility for Discovering New Scintillator Materials

Description: We describe the design and operation of a high-throughput facility for synthesizing thousands of inorganic crystalline samples per year and evaluating them as potential scintillation detector materials. This facility includes a robotic dispenser, arrays of automated furnaces, a dual-beam X-ray generator for diffractometery and luminescence spectroscopy, a pulsed X-ray generator for time response measurements, computer-controlled sample changers, an optical spectrometer, and a network-accessible… more
Date: April 25, 2008
Creator: Derenzo, Stephen; Derenzo, Stephen E; Boswell, Martin S.; Bourret-Courchesne, Edith; Boutchko, Rostyslav; Budinger, Thomas F. et al.
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Partner: UNT Libraries Government Documents Department
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Pulsed laser kinetic studies of liquids under high pressure

Description: A high pressure apparatus constructed for measuring the rates of reactions in liquids under pressures ranging from 1 atm to 2000 atm has been used to measure the complexation kinetics of molybdenum hexacarbonyl reacting with 2,2-bipyridine, 4,4{prime}-dimethyl-2-2{prime}-bipyridine and 4,4{prime}-diphenyl-2-2{prime} bipyridine in toluene. Pentacarbonyl reaction intermediates are created by a 10 nsec flash of frequency tripled Nd:YAG laser light. Measured activation volumes for chelate ligand ri… more
Date: November 25, 1991
Creator: Eyring, E.M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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A luminescent nanocrystal stress gauge

Description: Microscale mechanical forces can determine important outcomes ranging from the site of material fracture to stem cell fate. However, local stresses in a vast majority of systems cannot be measured due to the limitations of current techniques. In this work, we present the design and implementation of the CdSe/CdS core/shell tetrapod nanocrystal, a local stress sensor with bright luminescence readout. We calibrate the tetrapod luminescence response to stress, and use the luminescence signal to re… more
Date: October 25, 2010
Creator: Choi, Charina; Koski, Kristie; Olson, Andrew & Alivisatos, Paul
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Partner: UNT Libraries Government Documents Department
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The RHIC Hydrogen Jet Luminescence Monitor

Description: A hydrogen jet polarimeter was developed for the RHIC accelerator to improve the process of measuring polarization. Particle beams intersecting with gas molecules can produce light by the process known as luminescence. This light can then be focused, collected, and processed giving important information such as size, position, emittance, motion, and other parameters. The RHIC hydrogen jet polarimeter was modified in 2005 with specialized optics, vacuum windows, light transport, and a new camera… more
Date: June 25, 2007
Creator: Russo, T.; Bellavia, S.; Gassner, D.; Thieberger, P.; Trbojevic, D. & Tsang, T.
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Partner: UNT Libraries Government Documents Department
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Defect reduction in (11-20) a-plane GaN by two step epitaxiallateral overgrowth

Description: We report a two-step growth method to obtain uniformly coalesced epitaxial lateral overgrown a-plane GaN by metal-organic chemical vapor deposition (MOCVD). By obtaining a large wing height to width aspect ratio in the first step followed by enhanced lateral growth in the second step via controlling the growth temperature, we reduced the tilt angle between the advancing Ga-polar and N-polar wings for improved properties. Transmission electron microscopy (TEM) showed that the threading dislocati… more
Date: November 25, 2006
Creator: Ni, X.; Ozgur, U.; Fu, Y.; Biyikii, N.; Morkoc, H. & Liliental-Weber, Z.
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Partner: UNT Libraries Government Documents Department
open access

From Antenna to Assay: Lessons Learned in Lanthanide Luminescence

Description: Ligand-sensitized luminescent lanthanide(III) complexes are of considerable current interest due to their unique photophysical properties (micro- to millisecond lifetimes, characteristic and narrow emission bands, and large Stokes shifts), which make them well suited to serve as labels in fluorescence-based bioassays. The long-lived Ln(III) emission can be temporally resolved from scattered light and background fluorescence, resulting in vastly enhanced measurement sensitivity. One of the chall… more
Date: September 25, 2008
Creator: Moore, Evan; Samuel, Amanda & Raymond, Kenneth
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Partner: UNT Libraries Government Documents Department
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