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4 Aug 2008

Volume 93, Issue 5, Articles (05xxxx)

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Appl. Phys. Lett. 93, 051101 (2008); http://dx.doi.org/10.1063/1.2965797 (3 pages)

Mariano A. Zimmler, Jiming Bao, Federico Capasso, Sven Müller, and Carsten Ronning
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Thermally activated charge transfer in a Prussian blue derivative probed by resonant inelastic x-ray scattering

I. Jarrige, Y. Q. Cai, H. Ishii, N. Hiraoka, and A. Bleuzen

Appl. Phys. Lett. 93, 054101 (2008); http://dx.doi.org/10.1063/1.2966355 (3 pages) | Cited 2 times

Online Publication Date: 4 August 2008

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Charge-transfer excitation is at the source of the photoinduced magnetism observed in several Prussian blue molecule-based magnets. Using resonant inelastic x-ray scattering and x-ray absorption spectroscopy, we probe directly the thermally activated charge transfer in a photomagnetic Fe-Co cyanide, Cs0.7Co4[Fe(CN)6]2.9[◻]1.1.16H2O, where [◻] represents [Fe(CN)6] vacancies. The temperature dependence of both Co and Fe valence ratios is estimated for the first time in one cooling run, thus yielding a more complete picture of the temperature-induced cooperative electronic modifications. This novel approach, benefiting from relatively short acquisition times, opens the possibility for realtime characterization of the photoinduced magnetism in molecule-based magnets.
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78.20.Ls Magneto-optical effects
78.70.Ck X-ray scattering
73.21.-b Electron states and collective excitations in multilayers, quantum wells, mesoscopic, and nanoscale systems
78.67.-n Optical properties of low-dimensional, mesoscopic, and nanoscale materials and structures
75.50.Xx Molecular magnets
75.50.Dd Nonmetallic ferromagnetic materials

A single input-single output coupled microresonator array for the detection and identification of multiple analytes

Barry E. DeMartini, Jeffrey F. Rhoads, Mark A. Zielke, Kyle G. Owen, Steven W. Shaw, and Kimberly L. Turner

Appl. Phys. Lett. 93, 054102 (2008); http://dx.doi.org/10.1063/1.2964192 (3 pages) | Cited 8 times

Online Publication Date: 4 August 2008

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This work reports the experimental demonstration of single input-single output, multianalyte detection and identification using a coupled array of microresonators. A prototype sensor with four frequency-mistuned microbeam sensors, each coupled to a common shuttle mass resonator, is presented. Tailored localized modes of vibration in this coupled system are exploited to embed all requisite resonance shift information into the response of the common shuttle. Four standard polymers are applied to the microbeams to functionalize them for vapor detection. Toluene and methanol vapors, as well as toluene/methanol mixtures, are detected and identified using a single input signal and a single output signal.
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85.85.+j Micro- and nano-electromechanical systems (MEMS/NEMS) and devices
07.10.Cm Micromechanical devices and systems
07.07.Df Sensors (chemical, optical, electrical, movement, gas, etc.); remote sensing

Study by means of liquid side acoustic barrier of the influence of leaky Rayleigh waves on bounded beam reflection

Nico F. Declercq and Ebrahim Lamkanfi

Appl. Phys. Lett. 93, 054103 (2008); http://dx.doi.org/10.1063/1.2953707 (2 pages) | Cited 1 time

Online Publication Date: 7 August 2008

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The Schoch effect in ultrasonics, when sound is incident at the Rayleigh angle on a liquid-solid interface, consists of a forward beam displacement of the reflected beam, usually accompanied by a null strip in between the specular portion and the nonspecular reflected beam portion. It is a widely accepted idea that the effect is caused by reflected sound in combination with a sound field emitted by leaky Rayleigh waves. The current work presents an experimental technique to separate and investigate both fields separately by applying an acoustic barrier. The experiments are based on acousto-optic Schlieren photography.
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43.35.-c Ultrasonics, quantum acoustics, and physical effects of sound
43.20.Fn Scattering of acoustic waves
43.20.El Reflection, refraction, diffraction of acoustic waves

Model for the combination of diffusional and inertial particle deposition on inverse surfaces at low pressure

Christof Asbach, Heinz Fissan, Thomas A. J. Kuhlbusch, Jing Wang, and David Y. H. Pui

Appl. Phys. Lett. 93, 054104 (2008); http://dx.doi.org/10.1063/1.2967874 (3 pages) | Cited 1 time

Online Publication Date: 7 August 2008

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A model was developed to estimate particle contamination probabilities on inverse surfaces at low pressure for inertial and diffusional particle deposition under the influence of gravity, drag, and thermophoresis. The model shows that contamination probabilities strongly depend on particle size, initial velocity, and initial distance between particle and surface. While thermophoresis effectively protects the surface against deposition of particles with 10 mm (or more) initial distance and velocities below 1 m/s, the contamination probability of particles with an initial distance of 0.1 mm is very high for small particles due to their high diffusivity and for fast particles due to inertia.
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51.10.+y Kinetic and transport theory of gases
05.60.Cd Classical transport
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