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Theoretical Studies of Nucleation Kinetics and Nanodroplet Microstructure

Description: The goals of this project were to (1) explore ways of bridging the gap between fundamental molecular nucleation theories and phenomenological approaches based on thermodynamic reasoning, (2) test and improve binary nucleation theory, and (3) provide the theoretical underpinning for a powerful new experimental technique, small angle neutron scattering (SANS) from nanodroplet aerosols, that can probe the compositional structure of nanodroplets. This report summarizes the accomplishments of this p… more
Date: January 31, 2009
Creator: Wilemski, Gerald
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Integrative Bioengineering Institute

Description: Microfabrication enables many exciting experimental possibilities for medicine and biology that are not attainable through traditional methods. However, in order for microfabricated devices to have an impact they must not only provide a robust solution to a current unmet need, but also be simple enough to seamlessly integrate into standard protocols. Broad dissemination of bioMEMS has been stymied by the common aim of replacing established and well accepted protocols with equally or more comple… more
Date: January 9, 2009
Creator: Eddington, David; Magin,L,Richard; Hetling, John & Cho, Michael
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Quantum squeezed light for probing mitochondrial membranes and study of neuroprotectants.

Description: We report a new nanolaser technique for measuring characteristics of human mitochondria. Because mitochondria are so small, it has been difficult to study large populations using standard light microscope or flow cytometry techniques. We recently discovered a nano-optical transduction method for high-speed analysis of submicron organelles that is well suited to mitochondrial studies. This ultrasensitive detection technique uses nano-squeezing of light into photon modes imposed by the ultrasmall… more
Date: January 1, 2005
Creator: Gourley, Paul Lee; Copeland, Robert Guild; McDonald, Anthony Eugene; Hendricks, Judy K. & Naviaux, Robert K. (University of California, San Diego, CA)
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Scalable Methods for Electronic Excitations and Optical Responses of Nanstructures: Mathematics to Algorithms to Observables

Description: This multi-investigator project was concerned with the development and application of new methods and computer codes that would allow realistic modeling of nanosystems. Carter's part in this team effort involved two method/algorithm/code development projects during the first 14 months of this grant. Carter's group has been advancing theory and applications of the orbital-free density functional theory (OF-DFT), the only DFT method that exhibits linear scaling for metals. Such a method offers th… more
Date: January 23, 2009
Creator: Carter, Emily A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Advanced Thermoelectric Materials for Efficient Waste Heat Recovery in Process Industries

Description: The overall objective of the project was to integrate advanced thermoelectric materials into a power generation device that could convert waste heat from an industrial process to electricity with an efficiency approaching 20%. Advanced thermoelectric materials were developed with figure-of-merit ZT of 1.5 at 275 degrees C. These materials were not successfully integrated into a power generation device. However, waste heat recovery was demonstrated from an industrial process (the combustion exha… more
Date: January 6, 2009
Creator: Polcyn, Adam & Khaleel, Moe
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Nanofluidic devices for rapid detection of virus particles.

Description: Technologies that could quickly detect and identify virus particles would play a critical role in fighting bioterrorism and help to contain the rapid spread of disease. Of special interest is the ability to detect the presence and movement of virions without chemically modifying them by attaching molecular probes. This would be useful for rapid detection of pathogens in food or water supplies without the use of expensive chemical reagents. Such detection requires new devices to quickly screen f… more
Date: January 1, 2005
Creator: Gourley, Paul Lee; McDonald, Anthony Eugene & Hendricks, Judy K.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Nanotechnology applications to desalination : a report for the joint water reuse & desalination task force.

Description: Nanomaterials and nanotechnology methods have been an integral part of international research over the past decade. Because many traditional water treatment technologies (e.g. membrane filtration, biofouling, scale inhibition, etc.) depend on nanoscale processes, it is reasonable to expect one outcome of nanotechnology research to be better, nano-engineered water treatment approaches. The most immediate, and possibly greatest, impact of nanotechnology on desalination methods will likely be the … more
Date: January 1, 2011
Creator: Brady, Patrick Vane; Mayer, Tom & Cygan, Randall Timothy
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Application of Developed APCVD Transparent Conducting Oxides and Undercoat Technologies for Economical OLED Lighting

Description: Economics is a key factor for application of organic light emitting diodes (OLED) in general lighting relative to OLED flat panel displays that can handle high cost materials such as indium tin oxide (ITO) or Indium zinc oxide (IZO) as the transparent conducting oxide (TCO) on display glass. However, for OLED lighting to penetrate into general illumination, economics and sustainable materials are critical. The issues with ITO have been documented at the DOE SSL R&D and Manufacturing worksho… more
Date: January 2, 2011
Creator: Bluhm, Martin; Coffey, James; Korotkov, Roman; Polsz, Craig; Salemi, Alexandre; Smith, Robert et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Quantum Dot Light Enhancement Substrate for OLED Solid-State Lighting

Description: With DOE Award No. DE-EE00000628, QD Vision developed and demonstrated a cost-competitive solution for increasing the light extraction efficiency of OLEDs with efficient and stable color rendering index (CRI) for solid state lighting (SSL). Solution processable quantum dot (QD) films were integrated into OLED ITO-glass substrates to generate tunable white emission from blue emitting OLED) devices as well as outcouple light from the ITO film. This QD light-enhancement substrate (QD-LED) technolo… more
Date: January 21, 2011
Creator: Perkins, James; Stevenson, Matthew; Mahan, Gagan; Coe-Sullivan, Seth & Kazlas, Peter
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Hierarchical electrode architectures for electrical energy storage & conversion.

Description: The integration and stability of electrocatalytic nanostructures, which represent one level of porosity in a hierarchical structural scheme when combined with a three-dimensional support scaffold, has been studied using a combination of synthetic processes, characterization techniques, and computational methods. Dendritic platinum nanostructures have been covalently linked to common electrode surfaces using a newly developed chemical route; a chemical route equally applicable to a range of meta… more
Date: January 1, 2012
Creator: Zavadil, Kevin Robert; Missert, Nancy A.; Shelnutt, John Allen & van Swol, Frank B.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

NREL Improves Hole Transport in Sensitized CdS-NiO Nanoparticle Photocathodes (Fact Sheet)

Description: Significantly improved charge-collection efficiencies result from a general chemical approach to synthesizing photocathodes. It has been reported that a dye-sensitized nickel oxide (NiO) photocathode, when coupled to a dye-sensitized photoanode, could significantly increase overall solar conversion efficiency. However, the conversion efficiencies of these cells are still low. There has been much effort to improve the conversion efficiency by fabricating films with improved properties and develo… more
Date: January 1, 2012
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Laser Interactions in Nanomaterials Synthesis

Description: Laser interactions with materials have unique advantages to explore the rapid synthesis, processing, and in situ characterization of high quality and novel nanoparticles, nanotubes and nanowires. For example, laser vaporization of solids into background gases provides a wide range of processing conditions for the formation of nanomaterials by both catalyst-free and catalyst-assisted growth processes. Laser interactions with the growing nanomaterials provide remote in situ characterization of th… more
Date: January 1, 2010
Creator: Geohegan, David B.; Puretzky, Alexander A.; Rouleau, Christopher M.; Jackson, Jeremy Joseph; Eres, Gyula; Xiao, Kai et al.
Item Type: Refine your search to only Book
Partner: UNT Libraries Government Documents Department
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Measurement of Interfacial Area Production and Permeability within Porous Media

Description: An understanding of the pore-level interactions that affect multi-phase flow in porous media is important in many subsurface engineering applications, including enhanced oil recovery, remediation of dense non-aqueous liquid contaminated sites, and geologic CO2 sequestration. Standard models of two-phase flow in porous media have been shown to have several shortcomings, which might partially be overcome using a recently developed model based on thermodynamic principles that includes interfacial … more
Date: January 1, 2010
Creator: Crandall, Dustin; Ahmadi, Goodarz & Smith, Duane H.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Scale Up of Extended Thin Film Electrocatalyst Structures (ETFECS) (Fact Sheet)

Description: This NREL Hydrogen and Fuel Cell Technical Highlight discusses how NREL synthesized >1 gram of platinum ETFECS (nanotubes) for use as novel fuel cell catalysts. These materials represent the cumulative yield of four individual batch syntheses (each >250 milligrams yield). By producing these materials at gram quantity, NREL has shown the viability of scale up and produced sufficient material to allow further validation of properties, as well as in-depth electrode optimization and fuel cell… more
Date: January 1, 2012
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Highly Dispersed Alloy Catalyst for Durability

Description: Achieving DOE’s stated 5000-hr durability goal for light-duty vehicles by 2015 will require MEAs with characteristics that are beyond the current state of the art. Significant effort was placed on developing advanced durable cathode catalysts to arrive at the best possible electrode for high performance and durability, as well as developing manufacturing processes that yield significant cost benefit. Accordingly, the overall goal of this project was to develop and construct advanced … more
Date: January 8, 2013
Creator: Vivek S. Murthi (Primary Contact), Elise Izzo, Wu Bi, Sandra Guerrero and Lesia Protsailo
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Passivating ligand and solvent contributions to the electronic properties of semiconductor nanocrystals

Description: We examine in detail the impact of passivating ligands (i.e., amines, phosphines, phosphine oxides and pyridines) on the electronic and optical spectra of Cd{sub 33}Se{sub 33} quantum dots (QDs) using density functional theory (DFT) and time-dependent DFT (TDDFT) quantum-chemical methodologies. Most ligand orbitals are found deep inside in the valence and conduction bands of the QD, with pyridine being an exception by introducing new states close to the conduction band edge. Importantly, all li… more
Date: January 1, 2012
Creator: Fischer, S.; Crotty, A.; Kilina, S.; Ivanov, I. & Tretiak, S
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Final Report on Kokes Awards for the 20th North American Catalysis Society Meeting

Description: This Final Report describes how the Kokes Awards program was carried out for the 2007 meeting with regard to selection of students and disbursement of funds received from DOE and other sources. The objective of the Richard J. Kokes Travel Award program of the American Catalysis Society is to encourage graduate students to attend and participate meaningfully in the biennial North American Catalysis Society Meeting.
Date: January 1, 2008
Creator: Wong, Michael S.
Item Type: Refine your search to only Text
Partner: UNT Libraries Government Documents Department
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Nanoparticle Technology for Biorefining of Non-Food Source Feedstocks

Description: The goal of this proposed work is to develop and optimize the synthesis of mesoporous nanoparticle materials that are able to selectively sequester fatty acids from hexane extracts from algae, and to catalyze their transformation, as well as waste oils, into biodiesel. The project involves studies of the interactions between the functionalized MSN surface and the sequestering molecules. We investigate the mechanisms of selective extraction of fatty acids and conversion of triglycerides and fatt… more
Date: January 22, 2013
Creator: Pruski, Marek; Trewyn, Brian G.; Lee, Young-Jin & Lin, Victor S.-Y.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Ultrafast electron dynamics in silver nanoparticle arrays

Description: We present the results of ultrafast optical experiments on silver quantum dot superlattices. Dramatic changes in the electron dynamics occur as a function of interparticle spacing due to enhanced dipolar coupling and, most importantly, electron delocalization.
Date: January 1, 2002
Creator: Averitt, R. D. (Richard D.); Demsar, J. (Jure); Woode, E. K. (Ebenezer K.); Taylor, Antoinette J.,; Beverly, K. C. & Heath, J. R.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Nano-compression of carbon micro-balloons on a xp-nanoindenter

Description: Microballoons are thin hollow spheres that are bonded together with resins to form 'syntactic foam'. These foams exhibit very high specific compressive strength. Mechanical properties of the microballoons are integral to the mechanical properties of the syntactic foams and will also be useful in modeling of the system. This paper will present nano-compression results obtained for individual carbon microballoons (CMBs) tested between 5 and 50 mN on a XP nano-indentation device (MTS) customized w… more
Date: January 1, 2002
Creator: Gouadec, G.; Carlisle, K. (Kipp B.); Chawla, Krishan Kumar,; Koopman, M. (Mark) & Gladysz, G. M. (Gary M.)
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Nanodroplet quantification: pushing the detection limits of micro x-ray fluorescence

Description: In this study, detection limits for a variety of elements were determined on an EDAX Eagle I1 MXRF system equipped with a polycapillary and a Rh X-ray source. Both mass, volume, and spot diameter detection limits were established using dried spot technology, where various volumes and/or masses of different elements were deposited on different substrates, dried, and quantitatively analyzed by MXRF. Preliminary results have shown that sub-nanogram levels of material can be detected in less than 2… more
Date: January 1, 2002
Creator: Miller, T. C. (Thomasin C.) & Havrilla, G. J. (George J.)
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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