Now showing items 10427-10446 of 10784

• #### Ultra high vacuum scanning tunneling microscopy to study thin film growth ﻿

(1994)
An ultra high vacuum chamber was constructed to study thin film growth using scanning tunneling microscopy (STM). The sample stage is specially designed so that samples can be transferred in situ among various film preparation ...
• #### Ultra-sensitive tunable laser absorption spectroscopy: Applications and performance assessment ﻿

(2005)
Methodologies using tunable laser absorption spectroscopy (TLAS) for quantifying carbon dioxide stable isotopes (13/12CO 2), measuring atmospheric formaldehyde (CH2O), and analyzing exhaled carbonyl sulfide (COS) in human ...
• #### Ultra-short carbon nanotubes as nanocapsules for medical imaging and therapy ﻿

(2008)
This thesis details the development of ultra-short, single-walled carbon nanotubes (US-tubes) for use as nanocapsules to contain and deliver medical agents for both imaging (Gd3+ ) and therapeutic (211 At) purposes. In ...
• #### Ultra-short, Single-walled Carbon Nanotube Capsules for Diagnostic Imaging and Radiotherapy ﻿

(2013-07-24)
This thesis is centered on the Gadonanotubes (GNTs), an ultra-high-performance magnetic resonance imaging (MRI) contrast agent material discovered in our laboratories in 2005. The GNTs are a new paradigm in MRI contrast ...
• #### Ultracold collisions in atomic strontium ﻿

(2008)
In this work with atomic Strontium, the atoms are first laser cooled and subsequently trapped, in a MOT operating on the strong E1 allowed transition at 461 nm. During the operation of this blue MOT, a fraction of the atoms ...
• #### Ultrafast and magneto-optical spectroscopy of excitons and phonons in carbon nanotubes ﻿

(2010)
Understanding how electrons and phonons relax in energy and momentum is one of the current goals in carbon nanotube spectroscopy as well as an important step toward developing novel electronic and optoelectronic devices ...
• #### Ultrafast and magneto-optical spectroscopy of semiconductor heterostructures ﻿

(2012)
This thesis presents spectroscopic results using semiconductor heterostructures important for both applied and fundamental physics. First, we studied short-period superlattices of InAs and GaSb that suggest a promising ...
• #### Ultrafast carrier relaxation in solid buckminsterfullerene ﻿

(1994)
The time dependence of the carrier relaxation in undoped solid C$\sb{60}$ thin films has been studied by monitoring changes in the optical transmission upon photoexcitation using sub picosecond laser pulses at 2 eV. Optical ...
• #### Ultrafast electron dynamics in gold nanoshells ﻿

(2001)
In metallic nanostructures, the interaction of excited electrons with the nanostructure surface may result in electron relaxation dynamics that are significantly different than those predicted by electron-lattice coupling. ...
• #### Ultrafast magneto-optical spectroscopy of (III,manganese)V ferromagnetic semiconductors ﻿

(2005)
This thesis describes magneto-optical processes in ferromagnetic (III,Mn)V semiconductors and their heterostructures induced by femtosecond laser pulses. Two-color ultrafast magneto-optical spectroscopy has been developed, ...
• #### Ultrafast optical spectroscopy of single-walled carbon nanotubes ﻿

(2004)
Wavelength-dependent, near-infrared pump-probe study of micelle-suspended Single-Walled Carbon Nanotubes (SWCNTs) whose linear absorption spectra show chirality-assigned peaks is presented. Two distinct relaxation regimes ...
• #### Ultrafast Spectroscopy in High Magnetic Fields Using a Mini-coil Pulsed Magnet ﻿

(2013-04-19)
We have developed a unique magneto-optical system combining intense ultrashort laser pulses, low temperatures, and high magnetic fields up to 30 T with a table-top pulsed mini-coil magnet. With this unique system, we ...
• #### Ultralong-Range Molecules and Rydberg Blockade in Ultracold 84Sr ﻿

(2015-07-30)
My dissertation describes experiments on two-photon excitation of ultracold Sr to the 3S1 Rydberg series and represents the first experiments exciting Rydberg atoms via an intermediate triplet excited state. Due to the ...
• #### Ultrashort Single-walled Carbon Nanotubes: A Platform for Medical Imaging and Therapy ﻿

(2015-04-21)
Ultra-short single-walled carbon nanotubes (US-tubes) have been used to encapsulate various metal ions and small molecules for both diagnostic and therapeutic applications. Of the US-tube derivatives, one of the best ...

(1971)
• #### Ultrasonic attenuation in single crystals of aluminum potassium sulfate dodecahydrate and aluminum ammonium sulfate dodecahydrate as a function of frequency and temperature ﻿

(1962)
Because of suggestions that at least some alum crystals may become ferroelectric at low temperatures, and that a ferroelectric crystal would show anomalies in the absorption of sound, the attenuation of 10, 30 and 50 M.c. ...
• #### Ultrasonic attenuation measurements in superconducting metals ﻿

(1950)
Abstract Not Available.

(1978)

(1949)
• #### Ultrasonic velocity measurements on potassium chrome alum ﻿

(1953)
The velocity of propagation of longitudinal sound waves in a single crystal of potassium chrome alum was measured as a function of temperature. The waves were propagated normal to the (1,1,1) plane. In the temperature ...