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Displaying 51 - 75 of 401

Exploring the Kinetic and Thermodynamic Relationship of Charge Transfer Reactions used in Localized Electrodeposition and Patterning in a Scanning Bipolar Cell

May 14, 2019

Author(s)

Trevor M. Braun, D. T. Schwartz

Bipolar electrochemistry, defined as simultaneous oxidation and reduction reactions occurring on an electrically floating electrode, involves intricate coupling of the ohmic drop in the electrochemical cell to the thermodynamics and kinetics of the bipolar

Apparatus for Characterizing Gas-Phase Chemical Precursor Delivery for Thin Film Deposition Processes

March 26, 2019

Author(s)

James E. Maslar, William A. Kimes, Brent A. Sperling

Thin film vapor deposition processes, e.g., chemical vapor deposition, are widely utilized in high volume manufacturing of electronic and optoelectronic devices. Ensuring desired film properties and maximizing process yields requires control of the

Interfaces In Aromatic Polymer-Nanocellulose Composites

March 22, 2019

Author(s)

Douglas M. Fox, Jeremiah Woodcock, Sindhu Seethamraju, Jeffrey W. Gilman, Katrina Wakeman, Tess Ravick

Formation of well dispersed cellulose – polymer composites is a challenge. This is magnified when preparing composites using nanoscale materials, where the bulk properties are dominated by interfacial properties. In this chapter, synthetic and processing

Validation of thermophysical data for scientific and engineering applications

February 4, 2019

Author(s)

Vladimir Diky

Thermophysical property data are frequently affected by experimental and other errors significantly exceeding expected uncertainties, and validation of them is important when reliable values are needed. The methods used at Thermodynamics Research Center

Determination of physical and chemical properties of petroleum derivatives using gas chromatography and mass spectrometry data.

February 2, 2019

Author(s)

Werickson Fortunato de Carvalho Rocha, David Sheen

The physical properties of a substance such as a fuel are in principle determined solely by its composition, which can be determined or at least probed using techniques such as gas chromatography coupled with mass spectrometry (GC-MS). Because the

Compressed-liquid densities of Dimethyl Carbonate + Heptane at Three Compositions

December 27, 2018

Author(s)

Stephanie L. Outcalt, Arno Laesecke

Compressed-liquid densities of the binary system dimethyl carbonate + heptane have been measured with a vibrating-tube densimeter over the temperature and pressure ranges of 270 K to 470 K, and 1 MPa to 50 MPa at three compositions of the mixture. The

Compositional Imaging and Analysis of Late Iron Age Glass from the Broborg Vitrified Hillfort, Sweden

October 31, 2018

Author(s)

Jamie Weaver, Scott A. Wight, Carolyn Pearce, John McCloy, Thomas Lam, Rolf Sjoblom, David Peeler, Michael Schweiger, Albert Kruger, Scott Whittaker, Edward Vicenzi

Numerous Iron Age hillforts were constructed throughout Europe on high ground to serve ancient settlements. The edifice walls of a small fraction of hillforts were vitrified as a result of high temperature activity, most likely to reinforce the walls

Broadband Dielectric Spectroscopic Studies of Biological Material Evolution and Application to Paper

September 27, 2018

Author(s)

Mary Kombolias, Jan Obrzut, Karl Montgomery, Michael T. Postek, Dianne L. Poster, Yaw S. Obeng

Product composition and quality test methods for the paper and pulp industry remain rooted in manual, ex-situ, wet-bench chemistry techniques and are highly subjective. For example, the standard method for determining the furnish of paper, TAPPI T 401

Natural Alteration of 6Li Neutron Shielding Glass

September 21, 2018

Author(s)

Jamie L. Weaver, Danyal J. Turkoglu

Li-6 alumino-silicate glass, a neutron shielding material, has been studied to determine if and to what extent it alters under natural conditions. Analyses included neutron depth profiling, prompt gamma activation analysis, x-ray diffraction, and scanning

On the mechanisms and the characterization of the pulsed electron grafting of styrene onto poly(tetrafluoroethylene-co-hexafluoropropylene) to synthesize a polymer electrolyte membrane

September 21, 2018

Author(s)

Byung N. Kim, Alia Weaver, Marina Chumakov, Ileana M. Pazos, Dianne L. Poster, Karen Gaskell, Do H. Han, Gunther Scherer, Michael A. Yandrasits, Byung C. Lee, Mohamad Al-Sheikhly

During the pulsed-electron beam direct grafting of neat styrene onto poly(tetrafluoroethylene-co-hexafluoropropylene) (FEP) substrate, the radiolytically-produced styryl and carbon-centered FEP radicals undergo various desired and undesired competing

Data Quality and Assessment, Validation Methods and Error Propagation through the Simulation Software: Report from the Round-Table Discussion at the 10th World Congress of Chemical Engineering in Barcelona (October 1-5, 2017)

September 7, 2018

Author(s)

Paul M. Mathias, Ana Soto, Ljudmila Fele-Zilnik, Jean-Charles de Hemptinne, Ala Bazyleva, Jens Abildskov

The issues of data quality and propagation of data uncertainties into process design and plant uncertainties are of great current interest, and hence two Working Parties of the European Federation of Chemical Engineers (EFCE) organized a Round Table

A theoretically based departure function for multi-fluid mixture models

August 15, 2018

Author(s)

Ian H. Bell, Andreas Jaeger, Cornelia Breitkopf

Multi-fluid models for highly accurate multiparameter equations of state have been applied very successfully in the past years in order to accurately model thermophysical properties of mixtures. However, the predictive capabilities of this type of mixture

Heat transfer coefficient measurement of LN2 and GN2 in a microchannel at low Reynolds flow.

July 29, 2018

Author(s)

Seungwhan Baek, Peter Bradley, Ray Radebaugh

The heat transfer coefficients of single-phase fluids in the laminar flow regime have been studied for decades. However, inconsistent results are found in the literature. The common finding is that the Nusselt number is dependent on the Reynolds number in

Frequency -and electric field-dependent physical model of ferroelectric materials in the 10s of GHz

July 16, 2018

Author(s)

Eric J. Marksz, Christian J. Long, James C. Booth, Ichiro Takeicjo, Nathan D. Orloff

Ferroelectric materials are attractive for tunable components because their permittivity can be controlled by an applied electric field. The permittivity of these materials depends on frequency, and can have a strongly nonlinear electric field dependence

ThermoData Engine

June 21, 2018

Author(s)

Vladimir Diky, Chris D. Muzny, Kenneth G. Kroenlein, Eric W. Lemmon, Ian H. Bell, Andrei F. Kazakov, Yauheni Paulechka

Exceptionally reliable density solving algorithms for multiparameter mixture models from Chebyshev expansion rootfinding

May 21, 2018

Author(s)

Ian H. Bell, Bradley K. Alpert

Calculation of the density of a mixture for a given tem- perature, pressure, and mixture composition from multi- parameter mixture models (like the so-called GERG model) sometimes fails; failures are caused by insuffi- ciently accurate estimations of the

Superconformal Nickel Deposition in Through Silicon Vias: Experiment and Prediction

May 16, 2018

Author(s)

Trevor Braun, Daniel Josell, Thomas P. Moffat, Hyo Jong Lee, SH Kim

This work examines the filling of Through Silicon Vias (TSV) by Ni deposition from a NiSO4 + NiCl2 + H3BO3 electrolyte containing a branched polyethyleneimine suppressor previously. Feature filling occurs through the coupling of transport limited

The Impact of Adsorbates on Metal Deposition Through The Curvature Enhanced Accelerator Coverage Mechanism And Beyond

May 13, 2018

Author(s)

Daniel Josell, Thomas P. Moffat

Superconformal electrodeposition utilizing additives that adsorb on the deposit surface and either enhance or suppress metal deposition enabled the implementation of damascene interconnects in microelectronics using copper superfill in the late 1990s

Beta-Bond Scission and the Yields of H and CH3 in the Decomposition of i-Butyl Radicals

May 8, 2018

Author(s)

Laura A. Mertens, Jeffrey A. Manion

The relative rates of C-C and C-H β-scission reactions of i-butyl radicals were investigated with shock tube experiments at temperatures of (950 to 1250) K and pressures of (200 to 400) kPa. We produce i-butyl radicals from the decomposition of dilute

In situ infrared spectroscopy during La2O3 ALD using La(iPrCp)3 and H2O

April 26, 2018

Author(s)

Brent A. Sperling, James E. Maslar, Sergei Ivanov

Infrared spectra have been obtained during atomic layer deposition using tris(isopropylcyclopentadienyl)lanthanum, La(iPrCp)3, and water as precursors at 160 °C and 350 °C. Gas-phase spectra of La(iPrCp)3 are additionally obtained for comparison. At low

Heat Capacity of Saturated and Compressed Liquid Dimethyl Ether at Temperatures from (132 to 345) K and at Pressures to 35 MPa

April 11, 2018

Author(s)

Joe W. Magee, Jiangtao Wu

Molar heat capacities at constant volume (C_v) of dimethyl ether have been measured with an adiabatic calorimeter. Temperatures range from the triple point to 345 K, and pressures up to 35 MPa. Measurements were conducted on liquid in equilibrium with its

Electron-Enhanced Atomic Layer Deposition (EE-ALD) of Boron Nitride Thin Films at Room Temperature and 100degC

March 29, 2018

Author(s)

Alexana Roshko, Jaclyn Springer, Steven M. George, Andrew S. Cavanagh, Huaxing Sun, Paul T. Blanchard

Electron-enhanced atomic layer deposition (EE-ALD) was used to deposit boron nitride (BN) thin films at room temperature and 100 °C using sequential exposures of borazine (B3N3H6) and electrons. Electron stimulated desorption (ESD) of hydrogen surface

3D printed ABS-MOF composite materials and their gas storage properties

March 19, 2018

Author(s)

Michael Bible, Makfir Sefa, Julia Scherschligt, Zeeshan Ahmed, James A. Fedchak, Hartings Mathew

Metal organic framework materials (MOFs) have been primarily recognized for their ability to promote selective storage of gas molecules. In their as-synthesized (powdered) form, MOFs are not easily processed for use in end-devices where their properties

Evaluated Rate Constants for i-Butane + H and CH3: Shock Tube Experiments with Bayesian Model Optimization

March 7, 2018

Author(s)

Laura A. Mertens, Iftikhar A. Awan, Jeffrey A. Manion

The reactions of i-butane with CH3 and H were investigated with shock tube experiments (870 K to 1130 K and 140 kPa to 360 kPa). Propene and i-butene, measured with GC/FID and MS, were quantified as characteristic of H-abstraction from the primary and

Kinetics of H Atom Addition to Cyclopentene

March 7, 2018

Author(s)

Jeffrey A. Manion, Iftikhar A. Awan

To provide benchmark information needed to develop kinetic models of the combustion and pyrolysis of hydrocarbon ring structures, we have used the single pulse shock tube technique to study the kinetics of H atom addition to cyclopentene at 863 K to 1167 K