Publications

Displaying 51 - 75 of 176

Formic acid oxidation on Pt_100-x}Pb_x} thin films electrodeposited on Au

April 4, 2011

Author(s)

Sun M. Hwang, John E. Bonevich, Jae Jeong Kim, Thomas P. Moffat

Electrocatalytic formic acid oxidation is examined on electrodeposited Pt_100-x}Pb_x} thin films grown on textured Au(111). Metastable fcc Pb_100-x}Pt_x} (0

Superconformal Ni Electrodeposition using 2-Mercaptobenzimidazole

April 4, 2011

Author(s)

Chang H. Lee, John E. Bonevich, Ugo Bertocci, Kristen L. Steffens, Thomas P. Moffat

Ni superconformal filling of sub-micrometer trenches is demonstrated using a Watts bath containing an inhibitor 2-mercaptobenzimidazole (MBI). Hysteretic voltammetry marks the breakdown of the MBI-induced passive-state coincident with the onset of Ni

Correlation Between the Performance and Microstructure of Titanium Based Ohmic Contacts to p-type Silicon Nanowires

February 18, 2011

Author(s)

Abhishek Motayed, John E. Bonevich, Sergiy Krylyuk, Albert Davydov, Geetha G. Aluri, Rao V. Mulpuri

Understanding the contact formation mechanism at nanoscale geometries is essential for the realization of low-resistance, stable metallization schemes suitable for the next-generation of nanoelectronic devices. Metal contacts deposited on faceted silicon

Preparation and Properties of Nanoparticles of Calcium Phosphates with Various Ca/P Ratios

July 1, 2010

Author(s)

Limin Sun, Laurence C. Chow, Stanislav A. Frukhtbeyn, John E. Bonevich

This study aimed at preparing and studying the properties of nanoparticles of calcium phosphate (nCaP) with Ca/P ratios ranging from 1.0 to 1.67 using a spray-drying technique. Micro-structural analyses results suggested that the nCaPs with Ca/P ratios of

Measuring the Size of Nanoparticles Using Transmission Electron Microscopy (TEM)

March 1, 2010

Author(s)

John E. Bonevich, Wolfgang K. Haller

This assay protocol outlines procedures for sample preparation and the determination of mean nanoparticle size (in projection) using transmission electron microscopy (TEM). The projected diameter is the diameter of an equivalent hard uniform sphere

Silicon Nanowire Nonvolatile-Memory with Varying HfO2 Charge Trapping Layer Thickness

December 9, 2009

Author(s)

Xiaoxiao Zhu, Qiliang Li, D. E. Ioannou, H Gu, Helmut Baumgart, John E. Bonevich, John S. Suehle, Curt A. Richter

Compositional Control in Electrodeposited Pt(subscript 100-x)Cu(subscript x) Alloys.

October 7, 2009

Author(s)

J Mallett, Ugo Bertocci, John E. Bonevich, Thomas P. Moffat

The electrodeposition of Pt100-xCux alloys is demonstrated using an electrolyte comprised of 1mol/L H2SO4, 0.001 mol/L K2PtCl4 and 0.1 mol/L CuSO4. Film growth proceeds by facile Cu underpotential deposition (upd) occurring in parallel with Pt

Three-Dimensionally Structured CdTe Thin Film Photovoltaic Devices with Self-Aligned Back Contacts: Electrodeposition on Interdigitated Electrodes.

June 25, 2009

Author(s)

Daniel Josell, Carlos R. Beauchamp, Suyong S. Jung, Behrang H. Hamadani, Abhishek Motayed, Lee J. Richter, Maureen E. Williams, John E. Bonevich, Alexander J. Shapiro, Nikolai B. Zhitenev, Thomas P. Moffat

Cadmium-telluride photovoltaic cells were deposited on substrates patterned with two interdigitated electrodes. Deposition involved application of different potentials to the two electrodes in order to obtain a 3-d gradient of film properties within the

Superconformal Electrodeposition of Co and Co-Fe Alloys using 2-Mercapto-5-benzimidazolesulfonic Acid (MBIS)

June 10, 2009

Author(s)

Chang H. Lee, John E. Bonevich, Joseph E. Davies, Thomas P. Moffat

Superconformal Co(Fe) filling of submicrometer trenches by electrodeposition is demonstrated in the presence of 2-mercapto-5-benzimidazolesulfonic acid (MBIS). MBIS inhibits the initiation of Co deposition. Inhibition breakdown is characterized by

AC susceptibility studies of magnetic relaxation in nanoparticles of Ni dispersed in silica

April 1, 2009

Author(s)

V Singh, M Seehra, John E. Bonevich

Temperature dependence of AC susceptibilities χ' and χ'' are reported using frequencies fm = 0.1 Hz, 1 Hz, 99 Hz, 499 Hz and 997 Hz for nanoparticles (NPs) of Ni dispersed in silica (Ni/SiO2:15/85) with the mean sizes D=3.8 nm, 11.7 nm, 15 nm and 21nm. (σ

A Method for Fabricating Conductometric Gas Sensors of Metal Oxide Nanotubes Formed in Porous Aluminum Oxide Membranes

February 2, 2009

Author(s)

Reit Artzi-Gerlitz, Kurt D. Benkstein, David L. Lahr, Joshua L. Hertz, Christopher B. Montgomery, John E. Bonevich, Stephen Semancik, Michael J. Tarlov

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 sensing

400-Fold Reduction in Saturation Field by Interlayering

January 13, 2009

Author(s)

William F. Egelhoff Jr., John E. Bonevich, Philip Pong, John Unguris, Robert D. McMichael, Gery R. Stafford, Carlos R. Beauchamp

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

Inducing analytical orthogonality in tungsten oxide-based microsensors using materials structure and dynamic temperature control

January 4, 2009

Author(s)

Kurt D. Benkstein, Baranidharan Raman, David L. Lahr, John E. Bonevich, Stephen Semancik

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