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Journals

Microfluidic Directed Self-Assembly of Liposome-Hydrogel Hybrid Nanoparticles

April 29, 2010

Author(s)

Jennifer S. Hong, Samuel M. Stavis, Silvia H. De Paoli Lacerda, Laurie E. Locascio, Srinivasa R. Raghavan, Michael Gaitan

We present a microfluidic method to direct the self-assembly of liposome-hydrogel hybrid nanoparticles. Our approach yields nanoparticle size distributions that...

High Accuracy OH Reaction Rate Constants of CH2=CF-CF3 and trans-CHF=CF-CF3 and IR Absorption Spectra

April 29, 2010

Author(s)

Vladimir L. Orkin, Larissa E. Martynova, Alexander N. Ilichev

Rate constants for the gas phase reactions of OH radicals with two isomers of tetrafluoropropene, CH2=CF-CF3 (k1) and trans-CHF=CH-CF3 (k2); were measured using...

Feshbach resonances in ultracold gases

April 29, 2010

Author(s)

Chin P. Cheng, R Grimm, Paul S. Julienne, Eite Tiesinga

Feshbach resonances are the essential tool to control the interaction between atoms in ultracold quantum gases. They have found manifold experimental...

Femtosecond frequency comb measurement of absolute frequencies and hyperfine coupling constants in cesium vapor

April 29, 2010

Author(s)

Jason Stalnaker, Vela Mbele, Vladislav Gerginov, Tara Fortier, Scott Diddams, Leo Hollberg, C E. Tanner

We report measurements of absolute transition frequencies and hyperﬁne coupling constants for the 8S1/2 , 9S1/2 , 7D3/2 , and 7D5/2 states in 133 Cs vapor. The...

Charged-Particle Thermonuclear Reaction Rate Evaluation for A=12-40 Nuclei: I. Monte Carlo Method and Statistical Distributions

April 28, 2010

Author(s)

Ryan P. Fitzgerald, R Longland, C. Iliadis, E. Champagne, J.R. Newton, C. Ugalde

A new method based on Monte Carlo techniques is presented for evaluating thermonuclear reaction rates. We begin by reviewing commonly applied procedures and...

An LC-ESI/MS Method for Determining Theanine in Green Tea Dietary Supplements

April 28, 2010

Author(s)

Mary Bedner, Lane C. Sander, Katherine E. Sharpless

Theanine is the major amino acid present in Camellia sinensis, or green tea. A method for determining theanine in its native state using liquid chromatography...

Enhanced actuation and acoustic transduction by pressurization of micromachined piezoelectric diaphragms

April 28, 2010

Author(s)

Dylan Morris, David Bahr, Ryan Need, Michael Anderson

A strategy to increase the performance of diaphragm-type transducers is to provide an initial curvature to the diaphragm, which converts in-plane strains to...

MgO Tunnel Barriers in Magnetic Nanostructures and Devices

April 28, 2010

Author(s)

Ranko R. Heindl, Matthew Pufall, William Rippard

In recent years, there has been a great deal of success in the development of MgO based tunnel barriers for use in magnetic devices, such as nanoscale magnetic...

Microfluidic Mixing and the Formation of Nanoscale Lipid Vesicles

April 27, 2010

Author(s)

Andreas Jahn, Samuel M. Stavis, Jennifer S. Hong, Wyatt N. Vreeland, Don L. DeVoe, Michael Gaitan

We investigate the formation of unilamellar lipid vesicles (liposomes) with diameters of tens of nanometers by microfluidic hydrodynamic focusing (MHF). Our...

Modifications to the NIST Reference Measurement Procedure (RMP) for the Determination of Serum Glucose by Isotope Dilution Gas Chromatography/ Mass Spectrometry

April 27, 2010

Author(s)

Jocelyn L. Prendergast, Lorna T. Sniegoski, Michael J. Welch, Karen W. Phinney

NIST has been providing a Standard Reference Material (SRM) for glucose in human serum for many years to support accuracy in health care measurements. The...

Time-domain spectroscopy of the optical free-induction decay from vibrating molecules

April 26, 2010

Author(s)

Ian R. Coddington, William C. Swann, Nathan R. Newbury

Time-domain spectroscopy using dual, coherent frequency combs is used to measure free-induction decay from a molecular gas sample in the near-IR with a time...

CCQMK62: Nutrients in Infant/Adult Formula Vitamins

April 24, 2010

Author(s)

Katherine E. Sharpless, Catherine A. Rimmer, Karen W. Phinney, Bryant C. Nelson, David L. Duewer, Stephen A. Wise

Key Comparison CCQM-K62 was designed to enable demonstration of the equivalence in capabilities for measurement of vitamins in a food matrix. A milk-based...

Mixed Refrigerants for a Glass Capillary Micro Cryogenic Cooler

April 24, 2010

Author(s)

Mu Hong Lin, Peter E. Bradley, Marcia L. Huber, Ryan J. Lewis, Ray Radebaugh, Yung-Cheng Lee

Optimized mixed refrigerants are applied in Joule-Thomson (JT) micro cryogenic coolers (MCC) to enhance efficiency. Mixed refrigerants deliver equivalent...

Spectroscopy of 1.55 υm PbS Quantum Dots on Si Photonic Crystal Cavities with a Fiber Taper Waveguide

April 23, 2010

Author(s)

Matthew T. Rakher, Ranojoy Bose, Chee Wei Wong, Kartik A. Srinivasan

We use an optical fiber taper waveguide to probe PbS quantum dots (QDs) dried on Si photonic crystal cavities near 1.55 υm. We demonstrate that a low density (...

Code-division SQUID multiplexing

April 23, 2010

Author(s)

Michael D. Niemack, Kent D. Irwin, Joern Beyer, Hsiao-Mei Cho, William B. Doriese, Gene C. Hilton, Carl D. Reintsema, Daniel R. Schmidt, Joel N. Ullom, Leila R. Vale

Multiplexed superconducting quantum interference device (SQUID) readout systems are a critical technology for measuring large arrays of superconducting...

Probing the Nanoscale

April 23, 2010

Author(s)

Robert F. Cook

Nanoscale probes can now measure all manner of nanomechanical properties, opening up opportunities for new science and new devices.

Temperature dependence of adiabatic spin transfer torque and current polarization in Ni80Fe20 by spin wave Doppler measurements

April 23, 2010

Author(s)

Meng Zhu, Cindi L. Dennis, Robert McMichael

A spin wave Doppler technique is used to measure the temperature dependence of both the magnetization drift velocity and the current polarization in current...

Origin of Nanoscale Variations in Photoresponse of an Organic Solar Cell

April 22, 2010

Author(s)

Behrang H. Hamadani, Suyong S. Jung, Paul M. Haney, Lee J. Richter, Nikolai B. Zhitenev

Photo generated charge transport in bulk heterojunction (BHJ) solar cells is strongly dependent on the active layer nanomorphology resulting from phase...

Copulas for Uncertainty Analysis

April 20, 2010

Author(s)

Antonio M. Possolo

Applying the Monte Carlo method for propagation of measurement uncertainty described in the GUM Supplement 1, when the input quantities are correlated, involves...

Architectural Effects on Reaction-Diffusion Kinetics in Molecular Glass Photoresists

April 20, 2010

Author(s)

Vivek M. Prabhu, Shuhui Kang, Christopher L. Soles, Christopher K. Ober, Jing Sha, Jin-Kyun Lee, Peter V. Bonnesen

Understanding acid reaction-diffusion kinetics is crucial for controlling the lithographic performance of chemically amplified photoresists. In this work, we...

Direct Observation of Coherent Population Trapping in a Superconducting Artificial Atom

April 20, 2010

Author(s)

David P. Pappas, Jeffrey S. Kline, Willim R. Kelley, Zachary Dutton, Thomas A. Ohki, john Schlafer, Bashkar Mookerji

The phenomenon of coherent population trapping (CPT) of an atom (or solid state artificial atom ), and the associated effect of electromagnetically induced...

Tensile measurement of single crystal gallium nitride nanowires on MEMS test stages

April 18, 2010

Author(s)

J. J. Brown, A. I. Baca, Kristine A. Bertness, D. A. Dikin, R. S. Ruoff, Victor M. Bright

This paper reports the first direct tensile tests on nearly defect free, n-type (Si-doped) gallium nitride single crystal nanowires. Here, for the first time...

Summary Report on Federal Laboratory Technology Transfer FY 2008

April 16, 2010

Author(s)

Cathleen Cohn

Kinetics of the Thermal Reaction of H Atoms with Propyne

April 15, 2010

Author(s)

Claudette M. Rosado-Reyes, Jeffrey A. Manion, Wing Tsang

The reaction of hydrogen atoms with propyne(CH≡CCH3) has been investigated in a heated single pulse shock tube at temperatures of 870-1145K and pressures of 2-9...

Diffusion Parameters and Growth Mechanism of Phases in the Cu-Sn System

April 15, 2010

Author(s)

William J. Boettinger, C Ghosh, A Paul

The tracer diffusion coefficients of the elements as well as the integrated interdiffusion coefficients are measured for the Cu(sub3)Sn and Cu(sub6)Sn(Sub5)...

Shaping Arbitrary Nondiffracting Beams

April 15, 2010

Author(s)

Carlos Lopez-Mariscal, Kristian Helmerson

We present a novel beam shaping method to generate nondiffracting beams with a specific transverse shape. By tailoring the angular spectrum of a Helmholtz-Gauss...

Applications of Cross-Correlation Functions

April 14, 2010

Author(s)

Theodore V. Vorburger, Jun-Feng Song, Wei Chu, Li Ma, Xiaoyu A. Zheng, Thomas B. Renegar, Son H. Bui

We describe several examples where we use cross-correlation functions to quantify the similarity of 2D surface profiles or of 3D surface topography images. The...

Phase Compatibility of the Thermoelectric Compounds in the Sr-Ca-Co-O System

April 14, 2010

Author(s)

Winnie K. Wong-Ng, Guangyao Liu, Joshua B. Martin, Evan L. Thomas, Nathan Lowhorn, James A. Kaduk

Two low-dimensional cobaltite series in the Sr-Ca-Co-O system have been investigated for their solid solution limit, structure, and compatibility phase...

On the Design of High Efficiency Thermoelectric Type I Clathrates through Transition Metal Doping

April 14, 2010

Author(s)

Winnie K. Wong-Ng, X Shi, Joing Yang, S Bai, Jihui Yang, Hsin Wang, James Salvador, W Zhang, L Chen

We have developed a scheme for improving the thermoelectric properties of type I Ba8Ga16Ge30 clathrates by doping transition metals, TM, on the Ga sites. TM...

Characterization of the photoacid diffusion length and reaction kinetics in EUV photoresists with IR spectroscopy

April 14, 2010

Author(s)

Shuhui Kang, Wen-Li Wu, Kwang-Woo Choi, Vivek Prabhu, Anuja De Silva, Christopher K. Ober

A soft-contact film transfer method was developed to prepare multilayer photoresist thin films that enable high resolution spectroscopic and reflectivity...

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