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You searched on: Author: john bonevich

Displaying records 21 to 30 of 72 records.
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21. A Method for Fabricating Conductometric Gas Sensors of Metal Oxide Nanotubes Formed in Porous Aluminum Oxide Membranes
Published: 2/2/2009
Authors: Reit Artzi-Gerlitz, Kurt D Benkstein, David L. Lahr, Joshua L. Hertz, Christopher B Montgomery, John E Bonevich, Stephen Semancik, Michael J Tarlov
Abstract: We describe a general, simple strategy for fabricating conductometric gas sensors from metal oxide nanotubes formed in nanoporous aluminum oxide membranes. In this approach, the aluminum oxide membrane serves as both a template for growth of the sens ...

22. 400-Fold Reduction in Saturation Field by Interlayering
Published: 1/13/2009
Authors: William F. Egelhoff Jr., John E Bonevich, Philip Pong, John Unguris, Robert D McMichael, Gery R Stafford, Carlos R Beauchamp
Abstract: The buildup of stress with increasing thickness of magnetic thin films is a common phenomenon that often induces undesirable saturation fields that can convert an otherwise magnetically soft film into a magnetically hard one. We have found that by i ...

23. Inducing analytical orthogonality in tungsten oxide-based microsensors using materials structure and dynamic temperature control
Published: 1/4/2009
Authors: Kurt D Benkstein, Baranidharan Raman, David L. Lahr, John E Bonevich, Stephen Semancik

24. Nickel-Silica Nanocomposite: Variation of the Blocking Temperature With Magnetic Field and Measuring Frequency
Published: 2/27/2008
Authors: V Singh, M Seehra, John E Bonevich
Abstract: The variation of the blocking temperature T(subscript B) with measuring frequency f(subscript m) and applied field H are reported for Ni nanoparticles (NPs) embedded in SiO(subscript 2) matrix with the nominal composition Ni/SiO(subscript 2) (15/85). ...

25. Finite Size and Interparticle Interaction Effects in the Magnetic Properties of NiO Nanoparticles
Published: 1/2/2008
Authors: H Shim, M Seehra, John E Bonevich
Abstract: Magnetic properties of NiO nanoparticles (NP) prepared by the sol-gel method in the size range D = 5 nm to 20 nm, with and without oleic acid (OA) coating, are reported. Transmission electron microscopy (TEM) studies show the morphology of the small ...

26. Development of Ultra-Low Magnetic Field Sensors With Magnetic Tunnel Junctions
Published: 10/31/2007
Authors: Philip Pong, John E Bonevich, William F. Egelhoff Jr.
Abstract: The discovery of tunneling magnetoresistance (TMR) has enhanced the magnetoresistance (MR) ratio from the giant magnetoresistance (GMR) regime of around 10% to over 400% at room temperature. A combination of magnetic tunnel junctions with high magnet ...

27. Compositional Control in Electrodeposited Ni (subscript x) Pt (subscript 1-x) Films
Published: 10/29/2007
Authors: J Mallett, Erik B. Svedberg, John E Bonevich, Alexander J. Shapiro, William F. Egelhoff Jr., Thomas P Moffat
Abstract: Electrochemical co-deposition of a series of fcc Ni(subscript x)PT(subscript 1-x) alloys is demonstrated. The alloy composition is a monotonic function of potential. The Pt-rich Ni(subscript x)PT(subscript 1-x) alloys are formed at potentials posit ...

28. Electrodeposition of Ni in Sub-Micrometer Trenches
Published: 7/2/2007
Authors: S D Kim, John E Bonevich, Daniel Josell, Thomas P Moffat
Abstract: A survey of the effect of cationic, anionic and non-ionic surfactants on the rate and morphological evolution of nickel electrodeposition from a Watts-type bath is presented. Particular attention is given to the prospect for void free filling of sub ...

29. Precise Manipulation and Alignment of Single Nanowire
Published: 3/2/2007
Authors: Qiliang Li, Sang-Mo Koo, Curt A Richter, Monica D Edelstein, John E Bonevich, Joseph J Kopanski, John S Suehle, Eric M. Vogel
Abstract: Nanowires and nanotubes are being intensively investigated for nanoelectronic transport applications. The integration of such nanostructures into circuitry requires a simple, high-efficiency and low-cost strategy. Here we develop a single nanowire ma ...

30. Precise Alignment of single Nanowires and Fabrication of Nanoelectromechanical Switch and Other Test Structures
Published: 3/1/2007
Authors: Qiliang Li, Sang-Mo Koo, Curt A Richter, Monica D Edelstein, John E Bonevich, Joseph J Kopanski, John S Suehle, Eric M. Vogel
Abstract: The integration of nanowires and nanotubes into electrical test structures to investigate their nanoelectronic transport properties is a significant challenge. Here we present a single nanowire manipulating system to precisely manipulate and align in ...

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  • SP 250-XX: Calibration Services
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