A short pulse (7 [mu]s FWHM) and high repetition rate (dc-5kHz) cantilever piezovalve for pulsed atomic and molecular beams
Daniel Irimia, Dimitar Dobrikov, Rob Kortekaas, Han Voet, Daan A. van den Ende et al.
In this paper we report on the design and operation of a novel piezovalve for the production of short pulsed atomic or molecular beams. The high speed valve operates on the principle of a cantilever piezo. The only moving part, besides the cantilever piezo itself, is a very small O-ring that forms t ... [Rev. Sci. Instrum. 80, 113303 (2009)] published Mon Nov 23, 2009.
Glutaraldehyde enhanced dielectrophoretic yeast cell separation
Zachary Gagnon, Jill Mazur, and Hsueh-Chia Chang
We introduce a method for improved dielectrophoretic (DEP) discrimination and separation of viable and nonviable yeast cells. Due to the higher cell wall permeability of nonviable yeast cells compared with their viable counterpart, the cross-linking agent glutaraldehyde (GLT) is shown to selectively ... [Biomicrofluidics 3, 044108 (2009)] published Mon Nov 23, 2009.
Systematic Achievement of Improved Atomic-Scale Contrast via Bimodal Dynamic Force Microscopy
Shigeki Kawai, Thilo Glatzel, Sascha Koch, Bartosz Such, Alexis Baratoff et al.
Judiciously matched experiments, calculations, and theory demonstrate that a higher sensitivity to short-range interactions and, consequently, improved resolution on the atomic scale can be achieved by bimodal noncontact dynamic force microscopy. The combination of sub-Angstrom tip oscillation at th ... [Phys. Rev. Lett. 103, 220801 (2009)] published Mon Nov 23, 2009.
Low Frequency Vibration Isolation Through an Active-on-Active Approach: Coupling Effects
Qiao Sun, Robert A. Wolkow, and Mark Salomons
The extreme sensitivity of a scanning probe microscope demands an exceptional noise cancellation device that could effectively cut off a wide range of vibration noise. Existing commercial devices, although excellent in canceling high frequency noise, commonly leave low frequency vibration unattenuat ... [J. Vib. Acoust. 131, 061010 (2009)] published Fri Nov 20, 2009.
Comparison of amorphous silicon photodiodes and photoconductors for detection of quantum dot biomolecular tags
A. C. Pimentel, D. M. F. Prazeres, V. Chu, and J. P. Conde
A comparative study of the performance of hydrogenated amorphous silicon photosensors based on two different device configurations for integration in a microarray platform for biomolecular detection is presented. A perpendicular contact p-i-n photodiode and a parallel contact intrinsic photoconducto ... [J. Appl. Phys. 106, 104904 (2009)] published Fri Nov 20, 2009.
Texture classification via morphological scale-space: Tex-Mex features
Paul Southam and Richard Harvey
We consider the problem of classifying textures. First, we consider images where the orientation of the texture is known. Then, we consider the classification of textures where the orientation is unknown. Last, classification in real scenes is considered. A wide variety of techniques are tested usin ... [J. Electron. Imaging 18, 043007 (2009)] published Fri Nov 20, 2009.
Reflection-mode sensing using optical microresonators
Barry Koch, Yasha Yi, Jun-Ying Zhang, Stephen Znameroski, and Terry Smith
The authors present an approach for applying optical microring resonators to sensing. The approach relies on the interaction of the resonator with a nanoparticle taggant, which can induce coupling between forward and backward propagating traveling-wave resonant modes of the device. In the convention ... [Appl. Phys. Lett. 95, 201111 (2009)] published Thu Nov 19, 2009.
Dynamic monitoring of grating angle at the National Synchrotron Light Source
Shinan Qian, Dario Arena, Joseph Dvorak, and Kun Qian
We present a dynamic monitoring method and monitoring system of grating angle, referred to as the Precise Angle Monitor (PAM), at U4B, a soft x-ray spherical grating monochromator (SGM) beam line at the National Synchrotron Light Source (NSLS). In an SGM, a photon energy scan is accomplished by rota ... [Opt. Eng. 48, 113603 (2009)] published Thu Nov 19, 2009.
Protein patterning on the micro- and nanoscale by thermal nanoimprint lithography on a new functionalized copolymer
S. Merino, A. Retolaza, V. Trabadelo, A. Cruz, P. Heredia et al.
The localized depositions such as DNA or proteins at the micron or submicron scale on solids supports are a crucial step in the fabrication of advanced biochips and laboratory on chip devices. The present work shows a new approach: A new biofunctionalized copolymer based on 80% benzyl methacrylate a ... [J. Vac. Sci. Technol. B 27, 2439 (2009)] published Thu Nov 19, 2009.
Development and fertility studies on post-bio-electrosprayed Drosophila melanogaster embryos
Pascal Joly, Barbara H. Jennings, and Suwan N. Jayasinghe
Bio-electrosprays (BESs) provide a means of precisely manipulating cells and thus have the potential for many clinical uses such as the generation of artificial tissues/organs. Previously we tested the biological safety of this technology with a variety of living cells and also embryos from the vert ... [Biomicrofluidics 3, 044107 (2009)] published Wed Nov 18, 2009.
Alpha particle detection with GaN Schottky diodes
A. Y. Polyakov, N. B. Smirnov, A. V. Govorkov, A. V. Markov, E. A. Kozhukhova et al.
Ni/GaN Schottky diode radiation detectors were fabricated on 3-[mu]m-thick unintentionally doped n-GaN films grown by molecular beam epitaxy (MBE) and metal organic chemical vapor deposition (MOCVD) and on 12-[mu]m-thick undoped n-GaN layers prepared by epitaxial lateral overgrowth (ELOG). The rever ... [J. Appl. Phys. 106, 103708 (2009)] published Tue Nov 17, 2009.
Nonhysteretic behavior inside the hysteresis loop of VO and its possible application in infrared imaging
M. Gurvitch, S. Luryi, A. Polyakov, and A. Shabalov
In the resistive phase transition in VO, temperature excursions taken from points on the major hysteresis loop produce minor loops. For sufficiently small excursions these minor loops degenerate into single-valued, nonhysteretic branches (NHBs) linear in log(rho) versus T and having essentially the ... [J. Appl. Phys. 106, 104504 (2009)] published Tue Nov 17, 2009.
Nanomechanical mass detection using nonlinear oscillations
Mai Duc Dai, Kilho Eom, and Chang-Wan Kim
Nanomechanical resonators have allowed the in vitro molecular recognition. Most of detection is implemented in harmonic oscillation regime, albeit nanomechanical resonators can easily reach the nonlinear oscillation regime. In this letter, we have studied the nanomechanical mass detection using nonl ... [Appl. Phys. Lett. 95, 203104 (2009)] published Mon Nov 16, 2009.
Cascade optical chromatography for sample fractionation
Alex Terray, Joseph D. Taylor, and Sean J. Hart
Optical chromatography involves the elegant combination of opposing optical and fluid drag forces on colloidal samples within microfluidic environments to both measure analytical differences and fractionate injected samples. Particles that encounter the focused laser beam are trapped axially along t ... [Biomicrofluidics 3, 044106 (2009)] published Mon Nov 16, 2009.
Surface plasmon resonance-based gas sensor with chalcogenide glass and bimetallic alloy nanoparticle layer
Anuj K Sharma and Rajan Jha
A theoretical model for a gas sensor based on chalcogenide prism and surface plasmon resonance is proposed. The metal layer consists of AgAu alloy nanoparticles. The chalcogenide prism is made of sulfide glass GeGaSbS, commonly known as 2S2G. The angular interrogation method is used to analyze the s ... [J. Appl. Phys. 106, 103101 (2009)] published Mon Nov 16, 2009.
Ions in hyaluronic acid solutions
Ferenc Horkay, Peter J. Basser, David J. Londono, Anne-Marie Hecht, and Erik Geissler
Hyaluronic acid (HA) is an anionic biopolymer that is almost ubiquitous in biological tissues. An attempt is made to determine the dominant features that account for both its abundance and its multifunctional role, and which set it apart from other types of biopolymers. A combination of osmotic and ... [J. Chem. Phys. 131, 184902 (2009)] published Fri Nov 13, 2009.
Terahertz detector based on a superconducting tunnel junction coupled to a thin superconductor film
Seiichiro Ariyoshi, Tohru Taino, Adrian Dobroiu, Hiromi Sato, Hiroshi Matsuo et al.
The principle of a terahertz detector using a superconducting tunnel junction (STJ) coupled to a large terahertz-absorbing superconductor film is verified. We have detected terahertz radiation based on the Cooper-pair breaking process, and confirmed that the sensitivity has a sharp increase around 0 ... [Appl. Phys. Lett. 95, 193504 (2009)] published Fri Nov 13, 2009.
A gas-tight Cu Kalpha x-ray transparent reaction chamber for high-temperature x-ray diffraction analyses of halide gas/solid reactions
Samuel Shian and Kenneth H. Sandhage
An externally heated, x-ray transparent reaction chamber has been developed to enable the dynamic high temperature x-ray diffraction (HTXRD) analysis of a gas/solid [TiF(g)/SiO(s)] reaction involving a halide gas reactant formed at elevated temperatures (up to 350 degrees C) from a condensed source ... [Rev. Sci. Instrum. 80, 115108 (2009)] published Fri Nov 13, 2009.
Pr-doped fluoro-oxide lithium glass as scintillator for nuclear fusion diagnostics
Yasunobu Arikawa, Kohei Yamanoi, Tomoharu Nakazato, Elmer Surat Estacio, Toshihiko Shimizu et al.
Experimental results are presented on the neutron scintillating properties of a custom-designed Pr3+(praseodymium)-doped lithium (Li) glass. Luminescence was observed at 278 nm wavelength, originating from the 5d-4f transition. Time-resolved measurements yielded about 20 ns decay times for ultraviol ... [Rev. Sci. Instrum. 80, 113504 (2009)] published Fri Nov 13, 2009.
A new dual-purpose ultrahigh vacuum infrared spectroscopy apparatus optimized for grazing-incidence reflection as well as for transmission geometries
Y. Wang, A. Glenz, M. Muhler, and Ch. Woll
A newly designed ultrahigh vacuum (UHV) infrared spectroscopy apparatus dedicated to the spectroscopic characterization of oxides, singles crystals as well as powders, is described. It combines a state-of-the-art vacuum Fourier transform infrared (FTIR) spectrometer (Bruker, VERTEX 80v) with a novel ... [Rev. Sci. Instrum. 80, 113108 (2009)] published Fri Nov 13, 2009.
Direct measurement of spatial modes of a microcantilever from thermal noise
Pierdomenico Paolino, Bruno Tiribilli, and Ludovic Bellon
Measurements of the deflection induced by thermal noise have been performed on a rectangular atomic force microscope cantilever in air. The detection method, based on polarization interferometry, can achieve a resolution of 10 m/sqrt(Hz) in the frequency range 1800 kHz. The focused beam from the in ... [J. Appl. Phys. 106, 094313 (2009)] published Fri Nov 13, 2009.
Magnetic Resonance Imaging with a Dielectric Lens. (arXiv:0911.4116v1 [physics.med-ph])
ePrint arXiv http://arXiv.org/
The Evolution of FTK, a Real-Time Tracker for Hadron Collider Experiments. (arXiv:0911.4006v1 [physics.ins-det])
ePrint arXiv http://arXiv.org/
Performance Study of the CMS Barrel Resistive Plate Chambers with Cosmic Rays. (arXiv:0911.4045v1 [physics.ins-det])
ePrint arXiv http://arXiv.org/
Time Reconstruction and Performance of the CMS Electromagnetic Calorimeter. (arXiv:0911.4044v1 [physics.ins-det])
ePrint arXiv http://arXiv.org/
Alignment of the CMS Muon System with Cosmic-Ray and Beam-Halo Muons. (arXiv:0911.4022v1 [physics.ins-det])
ePrint arXiv http://arXiv.org/