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In-situ spectro-microscopy on organic films: Mn-Phthalocyanine on Ag(100)
Metal phthalocyanines are attracting significant attention, owing to their potential for applications in chemical sensors, solar cells and organic magnets. As the electronic properties of molecular films are determined by their crystallinity and molecular packing, the optimization of film quality is important for improving the performance of organic devices. Here, we present the results of in situ low-energy electron microscopy / photoemission electron microscopy (LEEM/PEEM) studies of incorporation-limited growth [1] of manganese-phthalocyanine (MnPc) on Ag(100) surfaces. MnPc thin films were grown on both, bulk Ag(100) surface and thin Ag(100)/Fe(100) films, where substrate spin-polarized electronic states can be modified through tuning the thickness of the Ag film [2]. We also discuss the electronic structure and magnetic ordering in MnPc thin films, investigated by angle- and spin-resolved photoemission spectroscopy.
Date:
August 18, 2013
Creator:
A., Al-Mahboob; Vescovo, E. & Sadowski, J.T.
Object Type:
Article
System:
The UNT Digital Library
INTERIM REPORT--INDEPENDENT VERIFICATION SURVEY OF SECTION 3, SURVEY UNITS 1, 4 AND 5 EXCAVATED SURFACES, WHITTAKER CORPORATION, REYNOLDS INDUSTRIAL PARK, TRANSFER, PENNSYLVANIA DCN: 5002-SR-04-0"
At Pennsylvania Department of Environmental Protection's request, ORAU's IEAV program conducted verification surveys on the excavated surfaces of Section 3, SUs 1, 4, and 5 at the Whittaker site on March 13 and 14, 2013. The survey activities included visual inspections, gamma radiation surface scans, gamma activity measurements, and soil sampling activities. Verification activities also included the review and assessment of the licensee�s project documentation and methodologies. Surface scans identified four areas of elevated direct gamma radiation distinguishable from background; one area within SUs 1 and 4 and two areas within SU5. One area within SU5 was remediated by removing a golf ball size piece of slag while ORAU staff was onsite. With the exception of the golf ball size piece of slag within SU5, a review of the ESL Section 3 EXS data packages for SUs 1, 4, and 5 indicated that these locations of elevated gamma radiation were also identified by the ESL gamma scans and that ESL personnel performed additional investigations and soil sampling within these areas. The investigative results indicated that the areas met the release criteria.
Date:
April 18, 2013
Creator:
ADAMS, WADE C
Object Type:
Report
System:
The UNT Digital Library
A Search for Dark Matter in Events with One Jet and Missing Transverse Energy in pp-bar Collisions at sqrt(s) = 1.96 TeV
None
Date:
January 18, 2013
Creator:
Aaltonen, T.; Alvarez Gonzalez, B.; Amerio, S.; Amidei, D.; Anastassov, A.; Annovi, A. et al.
Object Type:
Article
System:
The UNT Digital Library
Fermi-LAT Study of Gamma-Ray Emission in the Direction of Supernova Remnant W49B
None
Date:
June 18, 2013
Creator:
Abdo, A. A.; Ackermann, M.; Ajello, M.; Baldini, L.; Ballet, J.; Barbiellini, G. et al.
Object Type:
Article
System:
The UNT Digital Library
Final Pantex Report - 2006 [Phase 1 plan for assessment of Former Workers at the Pantex Facility]
The purpose of this project was to develop a Phase 1 plan for assessment of Former Workers at the Pantex Facility in Amarillo, TX and to determine the suitability to start a medical surveillance program among former workers for this site.
Date:
July 18, 2013
Creator:
Abdo, Ronna
Object Type:
Report
System:
The UNT Digital Library
Doctoral Recital: 2016-04-18 – Shoko Abe, collaborative piano
Recital presented at the UNT College of Music Recital Hall in partial fulfillment of the Doctor of Musical Arts (DMA) degree.
Date:
April 18, 2016
Creator:
Abe, Shoko
Object Type:
Sound
System:
The UNT Digital Library
Hydrogen Bonding between Solutes in Solvents Octan-1-ol and Water
This article discusses hydrogen bonding between solutes in solvents octan-1-ol and water.
Date:
October 18, 2010
Creator:
Abraham, M. H. (Michael H.); Gola, Joelle R. M.; Cometto-Muñiz, J. Enrique & Acree, William E. (William Eugene)
Object Type:
Article
System:
The UNT Digital Library
Response of NSTX Liquid Lithium divertor to High Heat Loads
Samples of the NSTX Liquid Lithium Divertor (LLD) with and without an evaporative Li coating were directly exposed to a neutral beam ex-situ at a power of ~1.5 MW/m2 for 1-3 seconds. Measurements of front face and bulk sample temperature were obtained. Predictions of temperature evolution were derived from a 1D heat flux model. No macroscopic damage occurred when the "bare" sample was exposed to the beam but microscopic changes to the surface were observed. The Li-coated sample developed a lithium hydroxide (LiOH) coating, which did not change even when the front face temperature exceeded the pure Li melting point. These results are consistent with the lack of damage to the LLD surface and imply that heating alone may not expose pure liquid Li if the melting point of surface impurities is not exceeded. This suggests that flow and heat are needed for future PFCs requiring a liquid Li surface. __________________________________________________
Date:
July 18, 2012
Creator:
Abrams, Tyler; Kallman, J; Kaitaa, R; Foley, E L; Grayd, T K; Kugel, H et al.
Object Type:
Article
System:
The UNT Digital Library
Someone To Talk To - Luke 11
Lecture given Wednesday, September 18, 2013, 4:00 PM at Abilene Christian University: "The disciples of Jesus are people of prayer but become aware of a profound difference in the way Jesus prays. They ask Him for insights. He gives them a model and a perspective that changes everything."
Date:
September 18, 2013
Creator:
Abshier, Mark A.
Object Type:
Sound
System:
The Portal to Texas History
Searches for Cosmic-Ray Electron Anisotropies with the Fermi Large Area Telescope
None
Date:
June 18, 2013
Creator:
Ackermann, M.; /Stanford U., HEPL /KIPAC, Menlo Park /Stanford U., Phys. Dept.; Ajello, M.; /Stanford U., HEPL /KIPAC, Menlo Park /Stanford U., Phys. Dept.; Atwood, W.B.; /UC, Santa Cruz et al.
Object Type:
Article
System:
The UNT Digital Library
Commentary on “Uncover the Effect of Solvent and Temperature on Solid-Liquid Equilibrium Behavior of L-Norvaline”
This article provides a commentary on several sets of reported curve-fit parameters for the Modified Apelblat model that do not correctly back-calculate the observed solubility behavior of L-norvaline in the binary aqueous-alcohol solvent mixtures.
Date:
August 17, 2017
Creator:
Acree, William E. (William Eugene)
Object Type:
Article
System:
The UNT Digital Library
Comments Concerning "Study of Molecular Interaction in Binary Liquid Mixtures of Ethyl Acetoacetate with Chloroform and Dimethylsulphoxide using Excess Acoustic Parameters and Spectroscopic Methods
Article commenting on a previously published article, "Study of molecular interaction in binary liquid mixtures of ethyl acetoacetate with chloroform and dimethylsulphoxide using excess acoustic parameters and spectroscopic methods."
Date:
February 18, 2014
Creator:
Acree, William E. (William Eugene) & Stephens, Timothy W.
Object Type:
Article
System:
The UNT Digital Library
Partition Coefficients of Organic Compounds in Four New Tetraalkylammonium Bis(trifluoromethylsulfonyl)imide Ionic Liquids Using Inverse Gas Chromatography
This article discusses partition coefficients of organic compounds in four new tetraalkylammonium bis(trifluoromethylsulfonyl)imide ionic liquids using inverse gas chromatography.
Date:
August 18, 2011
Creator:
Acree, William E. (William Eugene); Baker, Gary A.; Mutelet, Fabrice & Moïse, Jean-Charles
Object Type:
Article
System:
The UNT Digital Library
Ensemble: 2015-11-18 – African Percussion Ensemble
Access:
Use of this item is restricted to the UNT Community
A percussion ensemble recital performed at the UNT College of Music Voertman Hall.
Date:
November 18, 2015
Creator:
African Percussion Ensemble
Object Type:
Sound
System:
The UNT Digital Library
Radial Expansion of a Low Energy Positron Beam Passing Through a Cold Electron Plasma within a Uniform Magnetic Field
This paper from the 23rd Conference on Application of Accelerators in Research and Industry conference proceedings studies the radial expansion of a low energy positron beam passing through a cold electron plasma within a uniform magnetic field using a classical trajectory Monte Carlo simulation.
Date:
June 18, 2015
Creator:
Aguirre, F. F. & Ordonez, Carlos A.
Object Type:
Article
System:
The UNT Digital Library
U.S.-EU Trade and Economic Relations: Key Policy Issues for the 112th Congress
U.S. and European private stakeholders, concerned about slow growth, job creation, and increased competition from emerging economies, have urged Brussels and Washington to strengthen transatlantic trade and economic ties by reducing or eliminating remaining trade barriers and by cooperating more closely in addressing global economic challenges. A select group of these issues are examined in this report.
Date:
January 18, 2012
Creator:
Ahearn, Raymond J.
Object Type:
Report
System:
The UNT Digital Library
Export-Import Bank Reauthorization Debate
This report discusses the ongoing debate regarding the Export-Import Bank of the United States, a federal government corporation which is the the official export credit agency (ECA) of the U.S. Government. The bank's statutory charter expires on September 30, 2014, meaning that its authority to obligations generally would cease and a wind-down of operations would be required. The report gives four possible scenarios for approaches Congress could take in regards to approaching the bank's future authorization status.
Date:
August 18, 2014
Creator:
Akhtar, Shayerah Ilias
Object Type:
Report
System:
The UNT Digital Library
Tune Evaluation From Phased BPM Turn-By-Turn Data
In fast ramping synchrotrons like the Fermilab Booster the conventional methods of betatron tune evaluation from the turn-by-turn data may not work due to rapid changes of the tunes (sometimes in a course of a few dozens of turns) and a high level of noise. We propose a technique based on phasing of signals from a large number of BPMs which significantly increases the signal to noise ratio. Implementation of the method in the Fermilab Booster control system is described and some measurement results are presented.
Date:
May 18, 2010
Creator:
Alexahin, Y.; Gianfelice-Wendt, E. & Marsh, W.
Object Type:
Article
System:
The UNT Digital Library
Stuff Moving Through Other Stuff - For Energy
Representing the Understanding Charge Separation and Transfer at Interfaces in Energy Materials (EFRC:CST), this document is one of the entries in the Ten Hundred and One Word Challenge. As part of the challenge, the 46 Energy Frontier Research Centers were invited to represent their science in images, cartoons, photos, words and original paintings, but any descriptions or words could only use the 1000 most commonly used words in the English language, with the addition of one word important to each of the EFRCs and the mission of DOE energy. Understanding Charge Separation and Transfer at Interfaces in Energy Materials (EFRC:CST), is focused on advancing the understanding and design of nanostructured molecular materials for organic photovoltaic (OPV) and electrical energy storage (EES) applications.
Date:
July 18, 2013
Creator:
All EFRC effort,
Object Type:
Text
System:
The UNT Digital Library
Junior Recital: 2014-11-18 - Michael Alonzo, tenor and Matthew Dinh, baritone
Access:
Use of this item is restricted to the UNT Community
A junior recital presented at the UNT College of Music Recital Hall.
Date:
November 18, 2014
Creator:
Alonzo, Michael & Dinh, Matthew
Object Type:
Sound
System:
The UNT Digital Library
Mount Pleasant Tribune (Mount Pleasant, Tex.), Vol. 144, No. 40, Ed. 1 Wednesday, April 18, 2018
Semiweekly newspaper from Mount Pleasant, Texas that includes local, state, and national news along with advertising.
Date:
April 18, 2018
Creator:
Alsobrook, Bruce
Object Type:
Newspaper
System:
The Portal to Texas History
Ten-Minute Transformation - 12 Spiritual Disciplines in 10 Minutes or Less
Lecture given Wednesday, September 18, 2013, 10:00 AM at Abilene Christian University: "In his Sermon on the Mount, Jesus envisions us becoming more generous with our possessions, gracious toward people, and genuine in our piety. But given our hectic schedules, is this life possible? Explore the tiny spiritual disciplines that make the difference."
Date:
September 18, 2013
Creator:
Altrock, Chris
Object Type:
Sound
System:
The Portal to Texas History
Ten-Minute Transformation - Small Spiritual Steps to Revolutionize Life
Lecture given Wednesday, September 18, 2013, 9:00 AM at Abilene Christian University: "In his Sermon on the Mount, Jesus envisions us becoming more generous with our possessions, gracious toward people, and genuine in our piety. But given our hectic schedules, is this life possible? Explore the tiny spiritual disciplines that make the difference."
Date:
September 18, 2013
Creator:
Altrock, Chris
Object Type:
Sound
System:
The Portal to Texas History
The evolution of ion charge states in cathodic vacuum arc plasmas: a review
Cathodic vacuum arc plasmas are known to contain multiply charged ions. 20 years after “Pressure Ionization: its role in metal vapour vacuum arc plasmas and ion sources” appeared in vol. 1 of Plasma Sources Science and Technology, it is a great opportunity to re-visit the issue of pressure ionization, a non-ideal plasma effect, and put it in perspective to the many other factors that influence observable charge state distributions, such as the role of the cathode material, the path in the density-temperature phase diagram, the “noise” in vacuum arc plasma as described by a fractal model approach, the effects of external magnetic fields and charge exchange collisions with neutrals. A much more complex image of the vacuum arc plasma emerges putting decades of experimentation and modeling in perspective.
Date:
December 18, 2011
Creator:
Anders, Andre
Object Type:
Article
System:
The UNT Digital Library