Journals

Measuring Single-Walled Carbon Nanotube Length Distributions from Diffusional Trajectories

August 27, 2012

Author(s)

Jason Streit, Sergei M. Bachilo, Anton V. Naumov, Constantine Y. Khripin, Ming Zheng, R B. Weisman

A new method is demonstrated for measuring the length distributions of dispersed single-walled carbon nanotube (SWCNT) samples by analyzing diffusional motions...

Radio-microanalytical particle measurements method and application to Fukushima aerosols collected in Japan

August 26, 2012

Author(s)

Cynthia J. Zeissler, Lawrence Forsley, Richard M. Lindstrom, Sean Newsome, Adrean Kirk, P.A. Mosier-Boss

A nondestructive analytical method based on autoradiography and gamma spectrometry was developed to perform activity distribution analysis for particulate...

Microwave Measurements and Systematic Circuit-Model Extraction of Nanowire Metal Semiconductor Field Effect Transistors

August 24, 2012

Author(s)

Dazhen Gu, Thomas M. Wallis, Pavel Kabos, Paul T. Blanchard, Kristine A. Bertness, Norman A. Sanford

We present detailed on-wafer scattering parameter measurements and equivalent circuit modeling of metal semiconductor field effect transistor (MESFET) that...

Microwave measurements and systematic circuit-model extraction of nanowire metal semiconductor field-effect transistors

August 24, 2012

Author(s)

Dazhen Gu, Thomas M. Wallis, Pavel Kabos, Paul T. Blanchard, Kristine A. Bertness, Norman A. Sanford

We present detailed on-wafer scattering parameter measurements and equivalent circuit modeling of metal semiconductor field effect transistor (MESFET) that...

Coherent Diabatic Ion Transport and Separation in a Multizone Trap Array

August 24, 2012

Author(s)

Ryan S. Bowler, John P. Gaebler, Yiheng Lin, Ting Rei Tan, David Hanneke, John D. Jost, J. Home, Dietrich G. Leibfried, David J. Wineland

We investigate ion motion dynamics during the transport between and separation into spatially distinct trap locations in a multi-zone trap array. We laser-cool...

Accurate and Precise Calibration of AFM Cantilever Spring Constants using Laser Doppler Vibrometry

August 24, 2012

Author(s)

Richard S. Gates, Jon R. Pratt

Accurate cantilever spring constants are important in atomic force microscopy in both control of sensitive imaging and to provide correct nanomechanical...

A high-bandwidth electromagnetic MEMS motion stage for scanning applications

August 23, 2012

Author(s)

Young M. Choi, Nicholas G. Dagalakis, Jason J. Gorman, Seung Ho Yang, Yong Sik Kim, Jae M. Yoo

This paper presents the design, fabrication and experimental results of an out-of-plane electromagnetic motion stage. The combination of electromagnetic...

The effect of styrene-methyl methacrylate monomeric arrangement on the ultrasonic degradation of copolymers

August 23, 2012

Author(s)

Mallory J. Morris, Andre Striegel

Ultrasonic degradation is a convenient means of studying the degradation of macromolecules in transient elongational flows. Cavitation results in non-random...

Experimental Design and Data Evaluation Considerations for Comparisons of Higher-Order Value-Assigned Materials

August 22, 2012

Author(s)

David Duewer, Hugo H. Gasca-Aragon, Katrice Lippa, Blaza Toman

The analysis of higher-order value-assigned materials (HOVAMs) such as certified reference materials (CRMs) and value-assigned proficiency testing materials can...

MEMS-based universal fatigue test technique

August 22, 2012

Author(s)

Li-Anne Liew, David T. Read, Nicholas Barbosa

We have developed a MEMS (micro electro mechanical systems) -based method for fatigue testing of micro- to millimeter-sized specimens of any material (hence...

Tunable glass reference materials for quantitative backscattered electron imaging of mineralized tissues

August 21, 2012

Author(s)

Sara E. Campbell, Roy H. Geiss, Steve A. Feller, Virginia L. Ferguson

Backscatter electron (BSE) microscopy provides graylevel contrast resulting from variations in atomic composition. Through the use of standards, quantitative...

Microstructure evolution and development of annealed Ni/Au contacts to GaN nanowires

August 21, 2012

Author(s)

Andrew M. Herrero, Paul T. Blanchard, Aric W. Sanders, Matthew D. Brubaker, Norman A. Sanford, Alexana Roshko, Kristine A. Bertness

The development of Ni/Au contacts to Mg-doped GaN nanowires (NWs) is examined. Current-voltage (I-V) measurements of these Mg-doped nanowire devices frequently...

Structure Determination of a Polymeric Amorphous Chain Compound AlB₄H₁₁

August 21, 2012

Author(s)

Xuenian Chen, Yongsheng Zhang, Yongli Wang, Wei Zhou, Douglas A. Knight, Teshome B. Yisgedu, Zhenguo Huang, Hima K. Lingam, Beau Billet, Terrence J. Udovic, Gilbert M. Brown, Sheldon G. Shore, Christopher M. Wolverton, Ji-Cheng Zhao

The structure of the amorphous aluminoborane compound AlB 4H 11 was identified through a collaborative study closely coupling theoretical predictions via the...

Kinematic Modeling and Calibration of a Flexure Based Hexapod Nanopositioner

August 21, 2012

Author(s)

Hongliang Shi, Hai-Jun Su, Nicholas Dagalakis, John A. Kramar

This paper covers the kinematic modeling of a flexure-based, hexapod nanopositioner and a new method of calibration for this type of nanopositioner. This six...

Detailed Spectroscopy of the Cs2 a3Sigma+u State and Implications for Measurements Sensitive to Variation of the Electron/Proton Mass Ratio

August 21, 2012

Author(s)

S Sainis, J. M. Sage, D DeMille, Eite Tiesinga, Svetlana Kotochigova

We present spectroscopic data on moderately bound levels in the Cs2 a3Sigma+ u state. The data have sufficient resolution to be sensitive to rotational and...

Mass spectrometry quantification of clusterin in the human brain

August 20, 2012

Author(s)

Junjun J. Chen, Meiyao M. Wang, Illarion V. Turko

A multifunctional glycoprotein clusterin has been associated with late-onset Alzheimers disease (AD). This finding should prompt further investigation to...

Contact resistance of low-temperature carbon nanotube vertical interconnects

August 20, 2012

Author(s)

Ann C. Chiaramonti Debay, Sten Vollebregt, R. Ishihara, Hugo Schellevis, Kees Beenakker

In this work the electrical contact resistance and length dependant resistance of vertically aligned carbon nano- tubes (CNT) grown at 500 °C with high tube...

Second-order boundary corrections to the radial acoustic eigenvalues for a spherical cavity

August 17, 2012

Author(s)

Keith A. Gillis

We calculated the eigenvalues of the radially-symmetric acoustic modes of a gas-filled, spherical cavity to order (δ T/a) 2, where δ T is the thickness of the...

A modified Roberts-Langenbeck test for measuring thickness and refractive index variation of silicon wafers

August 17, 2012

Author(s)

Jungjae Park, Lingfeng Chen, Quandou (. Wang, Ulf Griesmann

We describe a method to simultaneously measure thickness variation and refractive index homogeneity of 300 mm diameter silicon wafers using a wavelength...

Photoluminescence Polarization in Strained GaN/AlGaN Core/Shell Nanowires

August 17, 2012

Author(s)

G. Jacopin, L. Rigutti, S. Bellei, P. Lavenus, F. H. Julien, Albert Davydov, Denis Tsvetkov, Kristine A. Bertness, Norman Sanford, John B. Schlager, M. Tchemycheva

The polarization properties of GaN/AlGaN core/shell nanowire (NW) heterostructures have been investigated using polarization resolved micro-photoluminescence (µ...

Optical isolator using an atomic vapor in the hyperfine Paschen-Back regime

August 15, 2012

Author(s)

Svenja A. Knappe, L. Weller, K.S. Kleinbach, M.A. Zentile, I.G. Hughes, C.S. Adams

A light, compact optical isolator using an atomic vapor in the hyperfine Paschen-Back regime is presented. Absolute transmission spectra for experiment and...

Interpretation and significance of reverse chevron-shaped markings on fracture surfaces of API X100 pipeline steels

August 15, 2012

Author(s)

Christopher N. McCowan, Elizabeth S. Drexler, Jeffrey W. Sowards

Fracture surfaces of X100 pipeline steels were examined with optical and electron microscopy following fracture testing. The fractures show chevron-like...

Eigenfunction expansions for a fundamental solution of Laplace's equation on R³ in parabolic and elliptic cylinder coordinates

August 14, 2012

Author(s)

Howard S. Cohl, Hans Volkmer

A fundamental solution of Laplace's equation in three dimensions is expanded in harmonic functions that are separated in parabolic or elliptic cylinder...

On the Nonlinearity of Maximum-length NFSR Feedbacks

August 14, 2012

Author(s)

Meltem Sonmez Turan

Linear Feedback Shift Registers (LFSRs) are the main building block of many classical stream ciphers; however due to their inherent linearity, most of the LFSR...

High-resolution neutron radiography of through-plane liquid water distribution in polymer electrolyte membrane and gas diffusion layer

August 14, 2012

Author(s)

Daniel S. Hussey, David L. Jacobson, Richard Fu, Ugur Pasaogullari, Takeshi Shiomi, Yuichiro Tabuchi

We re-investigate our previously studied water transport phenomena under nonisothermal conditions by measuring the through-plane liquid water distribution...

Recommended vapor pressure and thermophysical data for ferrocene

August 14, 2012

Author(s)

Michal Fulem, Kvetoslav Ruzicka, Marisa A. Rocha, Luis M.N.B.F. Santos, Robert F. Berg

Recommended vapor pressure data for ferrocene (CAS Registry Number: 102-54-5) in the temperature range from 242 to 447 K were developed by the simultaneous...

Investigating Structural Alterations in Pyrogallol[4]arene-Pyrene Nanotubular Frameworks

August 13, 2012

Author(s)

Harshita Kumari, Steven Kline, Jerry L. Atwood

Small-angle neutron scattering (SANS) studies are performed to investigate the stability and geometry of hydrogen-bonded pyrene-filled c-hexylprogallol[4]arene...

Perpendicular-Flow, Single-Wafer Atomic Layer Deposition Reactor Chamber Design for use with In Situ Diagnostics

August 13, 2012

Author(s)

William A. Kimes, James E. Maslar, Elizabeth F. Moore

A description is given of the design and performance of a diagnostic-accessible, perpendicular-flow, single-wafer deposition reactor for use with 50 mm wafers...

Scintillation Yield and Time Dependence from Electronic and Nuclear Recoils in Liquid Neon

August 13, 2012

Author(s)

Kevin J. Coakley, W. H. Lippincott, D. Gastler, E. Kearns, D. N. McKinsey, J. A. Nikkel

We have performed measurements of scintillation light in liquid neon, observing a signal yield in our detector as high as (3.5 +/- 0.04) photoelectrons/keV. We...

Multiple Magnetic Structures of Correlated Ce-ions in Intermetallic CeAu₂Ge₂

August 13, 2012

Author(s)

Deepak Singh, A. Thamizhavel, Jeffrey W. Lynn, S. K. Dhar, T. Hermann

Neutron diffraction measurements on a high quality single crystal of CeAu 2Ge 2 reveal two new magnetic structures that coexist with commensurate long range...