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You searched on: Author: john bonevich

Displaying records 11 to 20 of 72 records.
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11. Electrodeposition of Pt_(100-x)Pb_(x) Metastable Alloys and Intermetallics
Published: 4/4/2011
Authors: Sun M. Hwang, John E Bonevich, Jae Jeong Kim, Thomas P Moffat
Abstract: The electrodeposition of a series of metastable Pt-Pb alloys and intermetallic phases as well as elemental Pt is demonstrated using an acid electrolyte comprised of 0.05 mol/L Pb(ClO_4)_2 and/or 0.001 mol/L K_2PtCl_4. Pt-Pb films were deposited at va ...

12. Formic acid oxidation on Pt_{100-x}Pb_{x} thin films electrodeposited on Au
Published: 4/4/2011
Authors: Sun M. Hwang, John E Bonevich, Jae Jeong Kim, Thomas P Moffat
Abstract: 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 ...

13. Superconformal Ni Electrodeposition using 2-Mercaptobenzimidazole
Published: 4/4/2011
Authors: Chang H. Lee, John E Bonevich, Ugo Bertocci, Kristen L. Steffens, Thomas P Moffat
Abstract: 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 ...

14. Preparation and Properties of Nanoparticles of Calcium Phosphates with Various Ca/P Ratios
Published: 7/1/2010
Authors: Limin Sun, Laurence Chung Lung Chow, Stanislav A. Frukhtbeyn, John E Bonevich
Abstract: 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 ra ...

15. Measuring the Size of Nanoparticles Using Transmission Electron Microscopy (TEM)
Published: 3/1/2010
Authors: John E Bonevich, Wolfgang K. Haller
Abstract: 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 s ...

16. Silicon Nanowire Nonvolatile-Memory with Varying HfO2 Charge Trapping Layer Thickness
Published: 12/9/2009
Authors: Xiaoxiao Zhu, Qiliang Li, D. E Ioannou, H Gu, Helmut Baumgart, John E Bonevich, John S Suehle, Curt A Richter

17. Compositional Control in Electrodeposited Pt(subscript 100-x)Cu(subscript x) Alloys.
Published: 10/7/2009
Authors: J Mallett, Ugo Bertocci, John E Bonevich, Thomas P Moffat
Abstract: 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 overpo ...

18. Three-Dimensionally Structured CdTe Thin Film Photovoltaic Devices with Self-Aligned Back Contacts: Electrodeposition on Interdigitated Electrodes.
Published: 6/25/2009
Authors: 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
Abstract: 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 ...

19. Superconformal Electrodeposition of Co and Co-Fe Alloys using 2-Mercapto-5-benzimidazolesulfonic Acid (MBIS)
Published: 6/10/2009
Authors: Chang H. Lee, John E Bonevich, Joseph E. Davies, Thomas P Moffat
Abstract: 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 ...

20. AC susceptibility studies of magnetic relaxation in nanoparticles of Ni dispersed in silica
Published: 4/1/2009
Authors: V Singh, M Seehra, John E Bonevich
Abstract: 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, ...

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