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Journals

Tuning Open-Circuit Voltage in Organic Solar Cells with Molecular Orientation

June 24, 2015

Author(s)

Brent Kitchen, Omar Awartani, Regis J. Kline, Terry McAfee, Harald Ade, Brendan T. O'Connor

The role of molecular orientation of a polar conjugated polymer in a polymer-fullerene organic photovoltaic (OPV) cells is investigated. A planar heterojunction...

Methodology and Calculator for High Precision Regression Fits of Pyranometer Angular Responsivities and the Associated Uncertainties

June 23, 2015

Author(s)

Matthew T. Boyd

An easy to implement method for accurately utilizing pyranometer incidence angle dependent calibration factors, or responsivities (uV/W/m2), along with the...

The evolution of carbon nanotube network structure in unidirectional nanocomposites resolved by quantitative electron tomography

June 23, 2015

Author(s)

Bharath NMN Natarajan, Noa Lachman, Thomas F. Lam, Douglas Jacobs, Christian J. Long, Minhua Zhao, Brian L. Wardle, Renu Sharma, James A. Liddle

Carbon nanotube (CNT) reinforced polymers are next-generation, high-performance, multifunctional materials with a wide array of promising applications. The...

Behavior of Axially Loaded Steel Short Columns Subjected to A Localized Fire

June 23, 2015

Author(s)

Chao Zhang, Lisa Y. Choe, Mina S. Seif

Current structural re design approaches are based on uniform heating conditions. Steel short columns in real buildings may be exposed to non-uniform heating...

Addiction to MTH1 protein results in intense expression in human breast cancer tissue as measured by liquid chromatography-isotope-dilution tandem mass spectrometry

June 23, 2015

Author(s)

Erdem Coskun, Pawel Jaruga, Ann-Sofie Jemth, Olga Loseva, Leona D. Scanlan, Alessandro Tona, Mark S. Lowenthal, Thomas Helleday, M Miral Dizdar

MTH1 protein sanitizes the nucleotide pool so that modified 2'-deoxynucleoside triphosphates (dNTPs) cannot be used in DNA replication. Cancer cells require...

Laser frequency stabilization based on steady-state spectral-hole burning in Eu3+:Y2SiO5

June 23, 2015

Author(s)

Shon M. Cook, Till P. Rosenband, David R. Leibrandt

We present and analyze a method of laser frequency stabilization via steady-state patterns of spectral-holes in Eu3+:Y2SiO5. Three regions of holes are created...

Proximal Capture Dynamics for a Single Biological Nanopore Sensor

June 23, 2015

Author(s)

John J. Kasianowicz

Single nanopore sensors enable capture and analysis of molecules that are driven to the pore entry from bulk solution. However, the distance between an analyte...

New Second-Preimage Attacks on Hash Functions

June 23, 2015

Author(s)

Elena Andreeva, Charles Bouillaguet, Orr Dunkelman, Pierre-Alain Fouque, Jonathan J. Hoch, John M. Kelsey, Adi Shamir, Sebastien Zimmer

In this work, we present several new generic second-preimage attacks on hash functions. Our first attack is based on the herding attack and applies to various...

THERMOPLASTIC POLYURETHANES WITH CONTROLLED MORPHOLOGY BASED ON MDI/ISOSORBIDE/BUTANEDIOL HARD SEGMENTS

June 22, 2015

Author(s)

Fan Zhang, Ivan Javni, Olivera Bili?, Nikola Bili? , Zoran S. Petrovic, Jan Ilavsky

Isosorbide, a cyclic, rigid and renewable diol was used as a chain extender in two series of thermoplastic polyurethanes. Isosorbide was used in combination...

Measurement of Gas and Aerosol Phase Absorption Spectra across the Visible and Near-IR Using Supercontinuum Photoacoustic Spectroscopy

June 22, 2015

Author(s)

James G. Radney, Christopher D. Zangmeister

We demonstrate a method to measure the absorption spectra of gas and aerosol species across the visible and near-IR (500 to 840 nm) using a photoacoustic (PA)...

The Future of Forensic DNA Analysis

June 22, 2015

Author(s)

John M. Butler

The author's thoughts and opinions on where the field of forensic DNA testing is headed for the next decade are provided in the context of where the field has...

Cloud-Enabled Prognosis for Manufacturing

June 22, 2015

Author(s)

Robert Gao, Lihui Wang, Roberto Teti, David Dornfeld, Soundar Kumara, Masahiko Mori, Moneer Helu

Advanced manufacturing depends on the timely acquisition, distribution, and utilization of information from machines and processes across spatial boundaries for...

Copper-Substituted Iron Telluride: A Phase Diagram

June 22, 2015

Author(s)

Patrick N. Valdivia, Min Gyu Kim, Thomas R. Forrest, Zhijun Xu, Meng Wang, Hui Wu, Leland Harriger, Edith D. Bourret-Courchesne, Robert J. Birgeneau

Metal site alloying of the iron chalcogenides is known to give rise to bulk insulating states with no known analogue in the iron arsenide phase diagrams. We...

Metrology Needs for Predicting Concrete Pumpability

June 22, 2015

Author(s)

Myoungsung Choi, Chiara C. Ferraris, Nicos Martys, Didier Lootens, Van Bui, Trey Hamilton

With the increasing use of pumping to place concrete, the development and refinement of the industry practice to ensure successful concrete pumping is becoming...

A Unifying Framework to Quantify the Effects of Boundary Stiffness, Polymer-Substrate Interactions and Substrate Roughness on the Dynamics of Thin Supported Polymer Films

June 21, 2015

Author(s)

Jack F. Douglas, Paul Hanakata, Francis W. Starr, Beatriz Betancourt

Changes in the dynamics of supported polymer films in comparison to bulk materials involve a complex convolution of effects, such as boundary thermodynamic...

Self Assembly of Magnetic Nanoparticles at Silicon Surfaces

June 21, 2015

Author(s)

Katharina Theis-Brohl, Philipp Gutfreund, Alexei Vorobiev, Max Wolff, Boris P. Toperverg, Joseph Dura, Julie Borchers

Neutron reflectometry was used to study the assembly of magnetite nanoparticles in a water-based ferrofluid close to a silicon surface, Under three conditions...

Experimental Measurement of the Effect of Copper Through-Silicon Via Diameter on Stress Buildup Using Synchrotron-based X-ray Source

June 20, 2015

Author(s)

Chukwudi A. Okoro, Lyle E. Levine, Yaw S. Obeng, Ruqing Xu

In this work, the effect of Cu through-silicon via (TSV) diameter on stress buildup in Cu TSVs was experimentally determined using synchrotron-based X-ray...

Histone H3 Ser57 and Thr58 Phosphorylation in 5XFAD Mouse Brain

June 20, 2015

Author(s)

Kyle W. Anderson, Illarion V. Turko, Natalia Mast, Irina A. Pikuleva

Alzheimers disease (AD) is the most common neurodegenerative disorder, yet it is poorly understood. Currently, there is no treatment to delay onset or slow...

Flexible metal-organic framework compounds: In situ studies for selective CO2 capture

June 19, 2015

Author(s)

Andrew J. Allen, Laura Espinal, Winnie K. Wong-Ng, Wendy Queen, Craig Brown, Steven R. Kline, Kristi L. Kauffman, Jeffrey T. Culp

Results from in situ experiments are presented to correlate carbon capture with dynamic structural changes in two flexible metal-organic framework (MOF)...

Single to Multiquasiparticle Excitations in the Itinerant Helical Magnet CeRhIn₅

June 19, 2015

Author(s)

C. Stock, Jose Rodriguez Rivera, Karin Schmalzl, E. E. Rodriguez, A. Stunault, C. Petrovic

CeRhIn 5 is an itinerant magnet where the Ce 3+ spins order in a simple spiral phase caused by competing exchange interactions. We investigate the spin...

Mesomorphic Pathway in Early Stage Crystallization of Polyethylene

June 18, 2015

Author(s)

Kalman D. Migler, Angela R. Hight Walker, Anthony P. Kotula

The kinetic pathway by which a molten polymer transforms into a multi-length scale semi-crystalline structure upon cooling is an unsolved problem in polymer...

Gauge matters: Observing the vortex-nucleation transition in a Bose condensate

June 18, 2015

Author(s)

Ian B. Spielman, LeBlanc Lindsey, Karina Jimenez-Garcia, Ross Williams, Matthew Beeler, William D. Phillips

The order parameter of a quantum-coherent many-body system includes one or more phase degrees of freedom, which, owing to the phase information's relationship...

Comment on 'Ramsey Spectroscopy, matter-wave interferometry, and the microwave-lensing frequency shift'

June 18, 2015

Author(s)

Steven R. Jefferts, Thomas P. Heavner, Stephan E. Barlow, Neil Ashby

The authors believe that the theory of the proposed frequency shift by Gibble [1] contains a number of errors that undermine the validity of the proposed effect...

Molecular dynamics investigation of the effects of tip-substrate interactions during nanoindentation

June 18, 2015

Author(s)

Francesca M. Tavazza, Thomas Senftle, Chenyu Zou, Chandler A. Becker, Adri van Duin

Nanoindentation in molecular dynamics simulations typically uses a much idealized indenter tip. This tip is often either a single sphere or collection of atoms...

Direct Measurement of Trace Polycyclic Aromatic Hydrocarbons in Diesel Fuel with 1H and 13C NMR Spectroscopy: Effect of PAH Content on Fuel Lubricity

June 17, 2015

Author(s)

Peter Y. Hsieh, Jason Widegren, Andrew Slifka, Andrew J. Hagen, Ronald A. Rorrer

Surface-active trace compounds present in diesel fuels protect pumps and injectors against premature wear through boundary lubrication. Due to the vast number...

Economic impact of applying high strength steels in hydrogen gas pipelines

June 17, 2015

Author(s)

Jeffrey W. Sowards, James R. Fekete, Robert L. Amaro

Pipeline steel will likely be employed extensively to transport gaseous hydrogen in support of a future clean energy economy. To date, a hydrogen-specific cost...

Real-Time Electrical Detection of the Formation and Destruction of Lipid Bilayers on Silicon Nanowire Devices

June 16, 2015

Author(s)

Elissa H. Williams, Albert Davydov, Melanie L. Juba, Barney M. Bishop, Sergiy Krylyuk, Abhishek Motayed, Mulpuri V. Rao, John A. Schreifels

Analytical Methods for Determination of Polycyclic Aromatic Hydrocarbons (PAHs) A Historical Perspective on the 16 US EPA Priority Pollutant PAHs

June 16, 2015

Author(s)

Stephen A. Wise, Lane C. Sander, Michele M. Schantz

Since identified as priority pollutants by the U.S. Environmental Protection Agency (EPA) in 1979, the 16 EPA polycyclic aromatic hydrocarbons (PAHs) have been...

Strong asymmetric charge carrier dependence in inelastic electron tunneling spectroscopy of graphene phonons

June 16, 2015

Author(s)

Donat F. Natterer, Yue Y. Zhao, Jonathan E. Wyrick, Yang-Hao Chan, Wen-Ying Ruan, Mei-Yin Chou, Kenji Watanabe, Takashi Taniguchi, Nikolai B. Zhitenev, Joseph A. Stroscio

The observation of phonons in graphene by inelastic electron tunneling spectroscopy has been met with limited success in previous measurements arising from weak...

Analysis of Several High-Resolution Bands of Spiropentane, C5H8

June 15, 2015

Author(s)

Alfons Weber, A. Maki, J. E. Price, Jared Harzan, J. W. Nibler, T. Masiello, T Blake

The high resolution absorption spectrum of spiropentane (C5H8) from 200 cm-1 to 4000 cm−1 has been measured and a detailed analysis is presented for eight bands...

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