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Displaying 26826 - 26850 of 73960

Manipulating Quantum Dots to Nanometer Precision by Control of Flow

May 28, 2010
Author(s)
Chad Ropp, Roland Probst, Zachary Cummins, Rakesh Kumar, Andrew J. Berglund, Srinivasa R. Raghavan, Edo Waks, Benjamin Shapiro
Controlled manipulation of quantum dots with nanometer precision is an essential capability for basic science as well as for scalable engineering of nanophotonic and nanoelectronic devices. The most common methods for manipulation of particles use optical

Observations of Nanobubble Formation on Carbon Nanotubes

May 28, 2010
Author(s)
Andrew J. Slifka, Damian S. Lauria, Gurpreet Singh, Roop L. Mahajan
We used an optical trap and a high-speed camera to image bubble initiation on the surface of multi-walled carbon nanotubes. The laser wavelength was 1064 nm and the average power was 100 mW. This is the first demonstration of bubble formation on individual

Digital Circuits Using Self-Shunted Nb/NbxSi1-x/Nb Josephson Junctions

May 27, 2010
Author(s)
David I. Olaya, Paul Dresselhaus, Samuel Benz, Anna Herr, Quentin Herr, alex Ioannidis, Donald Miller, Alan Kleinsasser
For the first time superconducting digital circuits based on novel Josephson junctions with amorphous niobium-silicon (a-NbSi) barriers were designed, fabricated and tested. Compared with the resistively shunted aluminum-oxide-barrier junctions that are

Identifying RF Identification Cards from Measurements of Resonance and Carrier Harmonics

May 27, 2010
Author(s)
Henry Romero, Kate Remley, Dylan Williams, Chih-Ming Wang, Timothy X. Brown
We show that careful measurements of the unloaded resonant frequency and quality factor of radio frequency identification proximity cards allow identification of different card models and, for the set of cards we studied, identification with minimal error

Surrogate Mixture Models for the Thermophysical Properties of Aviation Fuel Jet-A

May 27, 2010
Author(s)
Marcia L. Huber, Eric W. Lemmon, Thomas J. Bruno
We developed surrogate mixture models to represent the thermophysical properties of two samples of aviation turbine fuel Jet-A. One sample is a composite of numerous batches from a multiple manufacturers and is considered to be a representative fuel. A

Effects of disorder and internal dynamics on vortex wall propagation

May 26, 2010
Author(s)
Hongki Min, Robert D. McMichael, Michael J. Donahue, Jacques Miltat, Mark D. Stiles
Experimental measurements of domain wall propagation are typically interpreted by comparison to ideal models that ignore the effects of extrinsic disorder and the internal dynamics of domain wall structures. Using micromagnetic simulations we study vortex

A common-view disciplined oscillator

May 24, 2010
Author(s)
Michael A. Lombardi, Aaron P. Dahlen
This paper describes a common-view disciplined oscillator (CVDO) that locks to a reference time scale through the use of common-view Global Positioning System (GPS) satellite measurements. A Proportional-Integral-Derivative (PID) controller obtains near

Competitive Adsorption of Thiolated Polyethylene Glycol and Mercaptoproprionic acid on Gold Nanoparticles Measured by Physical Characterization Methods

May 24, 2010
Author(s)
De-Hao D. Tsai, Frank W. DelRio, Robert I. MacCuspie, Tae Joon Cho, Michael R. Zachariah, Vincent A. Hackley
Adsorption kinetics between thiolated polyethylene glycol (SH-PEG) and mercaptoproprionic acid (MPA) on gold nanoparticles (Au-NP) were studied using dynamic light scattering (DLS) and electrospray differential mobility analysis (ES-DMA). Through a
Displaying 26826 - 26850 of 73960
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