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Displaying 32251 - 32275 of 73929

Relaxation Behavior of Polymer Structures Fabricated by Nanoimprint Lithography

August 14, 2007
Author(s)
Yifu Ding, Hyun Wook Ro, Thomas A. Germer, Jack F. Douglas, Brian C. Okerberg, Alamgir Karim, Christopher L. Soles
We study the decay of the imprinted polystyrene (PS) patterns under thermal annealing using light diffraction. The first order diffraction intensity from the imprinted gratings was measured as a function of annealing time. Local intensity maximum is

Where EAP Security Claims Fail

August 14, 2007
Author(s)
Katrin Hoeper, Lei Chen
The Extensible Authentication Protocol (EAP) is widely used as an authentication framework to control the access to wireless networks, e.g. in IEEE 802.11 and IEEE 802.16 networks. In this paper, we discuss limitations of EAP security and demonstrate how

Instability of Flatband Voltage in HfO2 Gate Stack Structures under Reducing/Oxidizing Annealing Conditions

August 13, 2007
Author(s)
K Ohmori, P Ahmet, M Yoshitake, T Chikyow, K Shiraishi, K Yamabe, H Watanabe, Y Akasaka, Kao-Shuo Chang, Martin L. Green, K Yamada
We have applied a combinatorial approach to fabricate work function (WF) tuned Pt-W alloy films and used the films as metal electrodes for HfO2/SiO2/Si capacitors. As the ratio RPt of Pt to W changes from 0 to 1, the WF value varies continuously from 4.7

Selectable Resistance-Area Product by Dilute Highly Charged Ion Irradiation

August 13, 2007
Author(s)
Joshua M. Pomeroy, Holger Grube, A C. Perrella, John D. Gillaspy
In order to provide high performance read heads for future hard drive densities, considerable effort worldwide has been invested in developing techniques for producing low resistance area product (RA) magnetic tunnel junction sensors. In this letter, we

Correlated photon-pair generation in reverse-proton-exchange PPLN waveguides with integrated mode demultiplexer at 10 GHz clock

August 6, 2007
Author(s)
Qiang Zhang, Xiuping Xie, Hiroki Takesue, Sae Woo Nam, Carsten Langrock, M. M. Fejer, Yoshihisa Yamamoto
We report 10-ps correlated photon pair generation in periodically-poled reverse-proton-exchange lithium niobate waveguides with integrated mode demultiplexer at a wavelength of 1.5-υm and a clock of 10 GHz. Using superconducting single photon detectors, we

Coupling Nanowire Chemiresistors With Microhotplate Platforms for Advanced Gas Sensing

August 6, 2007
Author(s)
Douglas C. Meier, Stephen Semancik, Bradley Button, Eugene Strelcov, Andrei Kilmakov
Recent advances in nanotechnology have yielded new materials and structures that offer great potential for improving sensitivity, selectivity and stability of the next generation of chemical gas sensors. To successfully fabricate practical devices, the

Classical Radionuclidic Calorimetry

August 2, 2007
Author(s)
Ronald Colle
This brief survey summarizes the principles and practice of classical isothermal microcalorimetry for the primary standardization of the activity of radionuclides. Its advantages and some potential problems are highlighted through the discussion of several

Interactions of Dispersive Shock Waves

August 2, 2007
Author(s)
Mark Hoefer, Mark J. Ablowitz
Interactions and collisions of dispersive shock waves in defocusing (repulsive) nonlinear Schrodinger-type systems are investigated analytically and numerically. Two canonical cases are considered. In one case, two counter-propagating dispersive shock

Characterization of degradation mechanisms in neural recording electrodes

August 1, 2007
Author(s)
Jennifer Anton, Stephanie A. Hooker
Understanding the nature of specific neural activity is essential to the progression of research in the field of brain disorders and diseases, as well as neuroprosthetics. Microelectrodes are the primary measurement devices used to transduce neural
Displaying 32251 - 32275 of 73929
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