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Effects of charge screening and surface properties on signal transduction in field effect nanowire biosensors
Posted on July 6th, 2009 No commentsYang Liu and Robert W. Dutton<br/> A self-consistent numerical model for silicon-based field effect nanowire biosensors is developed to study the impact of various surface-related physical and chemical processes, including transport of semiconductor carriers and electrolyte mobile ions, protonation and deprotonation of surface charge … [J. Appl. Phys. 106, 014701 (2009)] published Mon Jul 6, 2009.
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Pyroelectric effect enhancement through product property under open circuit condition
Posted on July 6th, 2009 No commentsH. H. S. Chang and Z. Huang<br/> An analytical model for the pyroelectric (PY) effect under open circuit condition and 2-2 connectivity laminates of various pairs of PY and nonpyroelectric (NP)/elastic materials has been developed. It is evident from our analysis that there indeed is a substantial dissimilarity between the PY coeff … [J. Appl. Phys. 106, 014101 (2009)] published Mon Jul 6, 2009.
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Observation of Gamma-point phonon frequency in ultrathin metallic films confirmed by ab initio calculation and lattice dynamics
Posted on July 6th, 2009 No commentsH. Tanei, K. Kusakabe, H. Ogi, N. Nakamura, and M. Hirao<br/> Vibrations in ultrathin metallic films excited by ultrafast light pulses have been studied based on continuum mechanics. However, this paper shows that they are Gamma-point phonon vibrations of plate-phonon modes. Ab initio and lattice dynamics calculations are made to compare Gamma-point phonon vib … [Appl. Phys. Lett. 95, 011902 (2009)] published Mon Jul 6, 2009.
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Size-dependent thermopower in nanocrystalline nickel
Posted on July 6th, 2009 No commentsAjay Soni and Gunadhor S. Okram<br/> Thermopower (S) of compacted nanocrystalline Ni of average particle size D=38, 32, and 25 nm at low temperatures (5300 K) is reported here. S exhibits striking deviations from bulk thermopower S behavior revealing evolution of S with change in D. As D decreases, there is significant decrease in S, g … [Appl. Phys. Lett. 95, 013101 (2009)] published Mon Jul 6, 2009.
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Surface acoustic waves with negative group velocity in a thin film structure on silicon
Posted on July 6th, 2009 No commentsA. A. Maznev and A. G. Every<br/> A surface acoustic wave mechanics dispersion curve of a thin film structure on silicon measured with the laser-induced transient grating technique displays a local minimum in frequency at nonzero wave mechanicsnumber. For a range of wave mechanicsnumbers to one side of this minimum the dispersion curve is of negative slope, impl … [Appl. Phys. Lett. 95, 011903 (2009)] published Mon Jul 6, 2009.
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Elastic percolation transition in nanowire-based magnetorheological fluids
Posted on July 6th, 2009 No commentsD. T. Zimmerman, R. C. Bell, J. A. Filer, II, J. O. Karli, and N. M. Wereley<br/> We observe an elastic percolation transition in the yield stress (tau) of cobalt-nanowire magnetorheological fluids, with a critical volume fraction of ferromagnetic particles (p) that increases with the applied magnetic field (H). Unlike studies of static percolation phenomena, our observations rev … [Appl. Phys. Lett. 95, 014102 (2009)] published Mon Jul 6, 2009.
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Erratum: Improved hydrogen detection sensitivity in N-polar GaN Schottky diodes [Appl. Phys. Lett. 94, 212108 (2009)]
Posted on July 6th, 2009 No commentsYu-Lin Wang, F. Ren, Yu Zhang, Q. Sun, C. D. Yerino et al.<br/> Abstract not available. [Appl. Phys. Lett. 95, 019903 (2009)] published Mon Jul 6, 2009.
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Investigating the role of hydrogen in indium oxide tubular nanostructures as a donor or oxygen vacancy passivation center
Posted on July 6th, 2009 No commentsMukesh Kumar, R. Chatterjee, S. Milikisiyants, A. Kanjilal, M. Voelskow et al.<br/> Electron paramagnetic resonance (EPR) spectroscopy of hydrogen-doped indium oxide (IO) tubular nanostructures shows presence of paramagnetic oxygen vacancies (V) at room temperature. For temperatures below 80 K, the EPR spectra exhibit two distinct split resonances correspond to S=(1/2) hydrogen ele … [Appl. Phys. Lett. 95, 013102 (2009)] published Mon Jul 6, 2009.
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Proposal for high sensitivity force sensor inspired by auditory hair cells
Posted on July 6th, 2009 No commentsTaegeun Song, Hee Chul Park, and Kang-Hun Ahn<br/> We propose a biomimetic electromechanical system mimicking auditory hair cell and investigate its mechanical properties. The biophysical properties of the biological hair cells, mechanical instability, and sensory adaptation are modeled using feedback control. The proposed system shows two different … [Appl. Phys. Lett. 95, 013702 (2009)] published Mon Jul 6, 2009.
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Spin relaxation in silicon coupled quantum dots
Posted on July 6th, 2009 No commentsWei Pan, Xiao Zhu Yu, and Wen Zhong Shen<br/> We present a detailed investigation for spin relaxation processes in silicon coupled quantum dots. Low-field magnetoconductance measurements have been employed to deduce phase dephasing and spin relaxation rates. On the basis of the dephasing theory containing triplet channel interaction, we have de … [Appl. Phys. Lett. 95, 013103 (2009)] published Mon Jul 6, 2009.