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Journals

Mg-Fe Thin Films: A Phase-separated Structure with Fast Kinetics of Hydrogenation

September 20, 2012

Author(s)

Shiyou Zheng, Ke Wang, Vladimir Oleshko, Leonid A. Bendersky

In this paper we suggest a new approach to improve the kinetics of hydrogenation based on a material with high density of interfaces between hydride-forming...

Dieseline for Supercritical Injection and Combustion in Compression-Ignition Engines: Volatility, Phase Transitions, Spray/Jet Structure, and Thermal Stability

September 20, 2012

Author(s)

George Anitescu, Thomas J. Bruno, Lawrence L. Tavlarides

To optimize the injection-combustion process of increasingly diversified fuels, thermophysical and chemical properties of new blends are required over wide...

Effect of Confinement on Structure, Water Solubility and Water Transport in Nafion Thin Films

September 19, 2012

Author(s)

Kirt A. Page, Scott Eastman, Shuhui Kang, Christopher L. Soles, Brandon W. Rowe

Fuel cells based on polymer electrolyte membranes (PEM) show promise as a means of energy conversion for a wide range of applications both in the transportation...

Gradient-based stopping rules for maximum-likelihood quantum-state tomography

September 18, 2012

Author(s)

Scott C. Glancy, Emanuel H. Knill, Mark Girard

When performing maximum likelihood quantum state tomography, one must find the quantum state that maximizes the likelihood for observed measurements on...

Evidence for Anisotropic Polar Nanoregions in Relaxor Pb(Mg_1/3}Nb_2/3})O₃: A Neutron Study of the Elastic Constants and Anomalous TA Phonon Damping in PMN

September 18, 2012

Author(s)

Christopher K. Stock, Peter M. Gehring, H. Hiraka, I. Swainson, Guangyong Xu, Z.-G. Ye, J.-F. Li, D. Viehland

We use neutron inelastic scattering methods to characterize the acoustic phonons in the relaxor Pb(Mg 1/3}Nb 2/3})O 3 (PMN) and demonstrate the presence of a...

Computational Design of New Refrigerant Fluids Based on Environmental, Safety, and Thermodynamic Characteristics

September 17, 2012

Author(s)

Andrei F. Kazakov, Mark O. McLinden, Michael D. Frenkel

We present a systematic search for new classes of refrigerants that would possess low values of Global Warming Potential (GWP), along with low- to moderate...

Impact of Size on Carbon Nanotube Transport in Natural Porous Media

September 17, 2012

Author(s)

Denis O'Carroll, Xeuying Liu, Nikolai Mattison, Elijah Petersen

Carbon nanotubes are the subject of intense research due to their unique properties: light weight, significant strength, excellent conductivity, and outstanding...

Characterization of a High-Speed (10 MHz) Quadrant Avalanche Photodiode for Measuring Cantilever Displacement

September 16, 2012

Author(s)

Brian G. Burke, David A. LaVan

We have measured the characteristics of a high-speed (10 MHz) quadrant avalanche photodiode (APD) in order to detect high frequency resonant oscillations and...

Ferri- to ferro-magnetic transition in the martensitic phase of a Heusler alloy

September 15, 2012

Author(s)

Robert D. Shull, Lawrence H. Bennett, Virgil Provenzano, Y. N. Jin, Igor Levin, E. Della Torre

During the past decade the magnetic properties of Heusler alloys have been extensively studied, motivated in part by the observation of large magnetocaloric...

A Sensitivity Study of the Heating Behavior of Composite Slab during Frame Fire Resistance Test

September 14, 2012

Author(s)

Dilip K. Banerjee

UV-induced photochemical transformations of citrate capped silver nanoparticle suspensions

September 14, 2012

Author(s)

Justin M. Gorham, Robert I. MacCuspie, Kate L. Klein, D H. Fairbrother, Richard D. Holbrook

Due to the increasing use of silver nanoparticles (AgNPs) in consumer products, it is essential to understand how variables, such as light exposure, may change...

Search for a T-odd, P-even Triple Correlation in Neutron Decay

September 14, 2012

Author(s)

Jeffrey S. Nico, T E. Chupp, K P. Coulter, R L. Cooper, S. J. Freeman, B. K. Fujikawa, A. Garcia, Gordon L. Jones, Hans P. Mumm, Alan K. Thompson, C A. Trull, F. E. Wiefeldt, J. F. Wilkerson

Time-reversal-invariance (T) violation, or equivalently, assuming charge-conjugation-parity-time-reversal (CPT) invariance, CP violation may explain the...

Accurate Gouy phase measurement in an astigmatic optical cavity

September 14, 2012

Author(s)

John R. Lawall, Mathieu Durand, Yicheng Wang

We present measurements of the Gouy phase accumulation for the fundamental mode of an astigmatic Fabry-Perot cavity over 70 % of its stability range. The method...

Colorimetric Detection with Aptamer-Gold Nanoparticle Conjugates: Effect of Aptamer Length on Response

September 14, 2012

Author(s)

Jorge L. Chavez, Robert I. MacCuspie, Nancy Kelley-Loughnane, Morley O. Stone

A riboflavin binding aptamer (RBA) was used in combination with gold nanoparticles (AuNPs) to detect riboflavin in vitro. The RBA-AuNPs responded...

Surface Effects on the Crystallization of cyclo-1,3,5-trimethylene-2,4,6-trinitramine (RDX) and the Consequences for its N K X-ray Emission Spectrum

September 13, 2012

Author(s)

Ilana G. Goldberg, Fernando D. Vila, Terrence Jach

Recent studies of the crystallization of cyclotrimethylene-trinitramine (RDX) have shown that the presence of the α- and β-phases of the compound is sensitive...

Sub-picosecond exciton dynamics at CuPc/C60 interfaces: Energy dependence of exciton dissociation

September 13, 2012

Author(s)

Steven W. Robey

Donor-acceptor interfaces are critical for the operation of organic photovoltaic devices. Exciton dynamics, leading to charge separation and recombination at...

Density and Speed of Sound Measurements of Four Bio-derived Fuels

September 13, 2012

Author(s)

Stephanie L. Outcalt, Tara J. Fortin

Compressed-liquid densities and ambient pressure densities and speeds of sound of four biomass-derived fuels have been measured. The compressed-liquid...

Experimental Study on Tire Fire Penetration into a Motorcoach Passenger Compartment

September 13, 2012

Author(s)

Erik L. Johnsson, Jiann C. Yang

Two full-scale fire experiments were conducted to determine the mode of penetration of a tire fire into the passenger compartment of a motorcoach. A special...

Zero-energy modes and gate-tunable gap in graphene on hexagonal boron nitride

September 13, 2012

Author(s)

Markus Kindermann, Bruno Uchoa, David L. Miller

In this article, we derive an effective theory of graphene on a hexagonal boron nitride (h-BN) substrate. We show that the h-BN substrate generically opens a...

Giant electrocaloric effect in ferroelectric poly(vinylidenefluoride-trifluoroethylene) copolymers near a first order transition

September 12, 2012

Author(s)

Fred B. Bateman, Xinyu Li, Xiaoshi Qian, Haiming Gu, Xiangzhong Chen, Sheng-Guo Lu, Minren Lin, Qiming Zhang

We present directly measured electrocaloric effect (ECE) from the P(VDF-TrFE) 65/35 mol% copolymer which displays a first order FE-PE transition. The data...

Electron Microscopy, Nanoscopy and Scanning Micro- and Nanoanalysis

September 12, 2012

Author(s)

Vladimir P. Oleshko, Renaat Gijbels, Severin Amelinckx

The paper considers history and stages of development of electron microscopy (EM) and scanning microanalysis, including theoretical aspects of electron beam...

Renormalization of the graphene dispersion velocity determined from scanning tunneling spectroscopy

September 11, 2012

Author(s)

Joseph A. Stroscio, Jungseok Chae, Nikolai B. Zhitenev, Suyong Jung, Andrea F. Young, Cory Dean, Yuanda Gao, Kenji Watanabe, Takashi Taniguchi, James Hone, Kenneth L. Shepard, Philip Kim, Lei Wang

In most metals, electrons behave as non-interacting quasiparticles with renormalized dynamical properties in the presence of electron interactions. Historically...

Dynamical Autler-Townes control of a phase qubit

September 10, 2012

Author(s)

Jian Li, G.S. Paraoanu, Katarina Cicak, Fabio Altomare, Jae Park, Raymond Simmonds, Mika A. Sillanpaa, Pertti Hakonen

We present an experimental demonstration of a phase qubit acting as an on/o® switch for the absorbtion of photons in a probe microwave beam. The switch is...

An Argument for Virtual Testing in the Cement Plant

September 10, 2012

Author(s)

Pichet Sahachaiyunta, Kittisak Pongpaisanseree, Jeffrey W. Bullard, Paul E. Stutzman, Edward Garboczi, Wilasa Vichit-Vadakan

The cement industry is moving toward customized commodity products, requiring plants that were built to consistently produce thousands of tons of one product...

Impacts of 2.4 GHz ISM Band Interference on IEEE 802.15.4 Wireless Sensor Network Reliability in Buildings

September 9, 2012

Author(s)

Wenqi Guo, William M. Healy, Mengchu Zhou

With the recent emergence of standards, wireless solutions are ready to be deployed in building automation networks. IEEE 802.15.4 is a standard for short range...

Effect of Al2O3 Nanolubricant on R134a Pool Boiling Heat Transfer

September 8, 2012

Author(s)

Mark A. Kedzierski

This paper quantifies the influence of Al2O3 nanoparticles on the pool boiling performance of R134a/polyolester mixtures on a roughened, horizontal, flat...

Observation of spin-valve effect in Alq3 using a low work function metal

September 7, 2012

Author(s)

Hyuk-Jae Jang, Kurt Pernstich, David J. Gundlach, Oana Jurchescu, Curt A. Richter

We present the observation of magnetoresistance in Co/Ca/Alq3/Ca/NiFe spin-valve devices. Thin Ca layers contacting 150 nm thick Alq3 enable the injection of...

100-Fold Reduction of Electric-Field Noise in an Ion Trap Cleanded with In Situ Argon-Ion-Beam Bombardment

September 7, 2012

Author(s)

Dustin Hite, Yves Colombe, Andrew C. Wilson, Kenton R. Brown, Ulrich J. Warring, Robert Jordens, John D. Jost, David P. Pappas, Dietrich Leibfried, David J. Wineland, Kyle McKay

Anomalous heating of trapped atomic ions is a major obstacle to their use as quantum bits in scalable quantum computers. The physical origin of this electric...

Anisotropy induced Feshbach resonances in a quantum dipolar gas of magnetic atoms.

September 7, 2012

Author(s)

A Petrov, Svetlana A. Kotochigova, Eite Tiesinga

We explore the anisotropic nature of Feshbach resonances in the collision between ultracold magnetic submerged-shell dysprosium atoms, which can only occur due...

Simulating Capacitances to Silicon Quantum Dots: Breakdown of the Parallel Plate Capacitor Model

September 5, 2012

Author(s)

Ted C. Thorbeck, Akira Fujiwara, Neil M. Zimmerman

The ability to design gate capacitances to quantum dots is critical for many applications of quantum dots from quantum information and single electron logic to...

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