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Displaying 3026 - 3050 of 3759

Ligand Exchange Reactions in the Formation of Diphosphine-Protected Gold Clusters

August 14, 2008

Author(s)

Denis E. Bergeron, Orkid Coskuner, Jeffrey W. Hudgens, Carlos A. Gonzalez

… as reaction bottlenecks. Ligand exchange mechanisms and ion equilibria were established in the absence of a reducing …

Shaped Pupil Coronagraphs for Planet Finding: Optimization, Manufacturing, and Experimental Results

August 4, 2005

Author(s)

Jeremy Kasdin, Ruslan Belikov, James A. Beall, Robert J. Vanderbei, Michael G. Littman, Michael Carr, Amir Give''on

… at 4 ?/D, without wavefront control. We describe the deep ion etching manufacturing process to make free standing …

A Novel Test Method for Measuring Mechanical Properties at the Small-Scale: The Theta Specimen

June 9, 2005

Author(s)

George D. Quinn, Lin-Sien H. Lum, Dan Xiang, Ajitkumar Jillavenkatesa, Li Ma, Douglas T. Smith

… silicon specimens were fabricated by deep reactive ion etching (DRIE) of a single crystal wafer and were tested …

Rapid Fixation of Methylene Chloride By a Macrocyclic Amine

March 1, 2005

Author(s)

J C. Lee, Keith J. Stanger, Bruce C. Noll, Carlos A. Gonzalez, M Marquez, Bradley D. Smith

… macrocycle, such that the product is a tightly associated ion-pair. X-ray crystal structures of the starting amine and …

First-Principles Calculations of the Dielectric Properties of Perovskite-Type Materials

November 1, 2003

Author(s)

Eric J. Cockayne

We compare first-principles (FP) calculations of the ionic effective charges, phonon frequencies, and static dielectric permittivities k s of several perovskite-type materials. Transition metal ions have anomalously large effective charges, though in the

Microwave Surface Impedance and Nonlinear Properties of MgB 2 Films

June 1, 2003

Author(s)

James Booth, Sang Y. Lee, Kenneth Leong, J. H. Lee, J. Lim, H. N. Lee, S. H. Moon, B. Oh

… coplanar waveguide devices. The effects of surface ion-milling on the nonlinear properties of MgB 2 films were …

Composition standards for III-V semiconductor epitaxial films

November 11, 2002

Author(s)

Kristine A. Bertness, Lawrence H. Robins, J T. Armstrong, Ryna B. Marinenko, Albert J. Paul, Marc L. Salit

… (EMPA), x-ray photoemission spectroscopy, and secondary ion mass spectroscopy. The SRMs will also allow greater …

A Strategy for Examining Complex Mixtures of Deoxyoligonucleotides Using IP-RP HPLC, MALDI-TOF MD, and Informatics

March 17, 2002

Author(s)

Peter Vallone, J E. Devaney, J M. Marino

… time-of-flight mass spectrometry (MALDI-TOF MS)and ion pair-reverse phase high performance liquid chromatography …

Cytonectin Expression in Alzheimer's Disease

March 1, 2002

Author(s)

S J. Anderson, Peter E. Barker, M G. Hadfield

… 35,000 molecular weight protein that displays remarkable ion-independent adherence properties. This consigns it to a …

Crystallographic Studies and X-Ray Diffraction Patterns of Ba 5 R 8 Zn 4 O 21 by Rietveld Refinements

September 1, 2001

Author(s)

Winnie K. Wong-Ng, James A. Kaduk, J Dillingham

The structure of the Ba 5R 8Zn 4O 21 series (R =lanthanides) was investigated using x-ray Rietveld refinements. The compounds were successfully prepared for R = Eu, Gd, Dy, Ho, Er, Tm, and Yb. For larger R, Ba 5R 8Zn 4O 21 was not stable, and tetragonal

Phase Equilibria of the SrO-Yb 2 O 3 -CuO x System in Air

September 1, 2001

Author(s)

J Dillingham, Winnie Wong-Ng, Igor Levin

The phase diagram of the SrO-Yb 2O 3-CuO x system was investigated in air. The solid solution (Sr 14-xYb x)Cu 24O z (O 13Yb)Cu 24O z indicated that this phase is incommensurate, with the modulation wave vector q=(1/2-z)c*, znearly equal to}0.066. The Sr

Current Projects of ISO Technical Committee 201 on Surface Chemical Analysis

February 1, 2001

Author(s)

Cedric J. Powell

… for Auger electron spectroscopy (AES), secondary ion mass spectrometry, X-ray photoelectron spectroscopy …

Electron Collision Cross Sections Derived from Critically Assessed Data

July 1, 1999

Author(s)

Loucas G. Christophorou, James K. Olthoff

Electron-molecule collisions are among the most fundamental processes in gas discharges. They are also the precursors of the ions and the radicals which drive the etch, cleaning, or deposition processes in plasma reactors. Hence, there is a need for a

Comparison of Measured and Modeled Scanning Capacitance Microscopy Images Across P-N Junctions

July 1, 1998

Author(s)

Joseph Kopanski, Jay F. Marchiando, John Albers, Brian G. Rennex

… capacitance microscope (SCM) image contrast measured on ion implanted P + /P and P + /N junction structures with …

Spin-Polarized Electron Scattering Studies of the Ferromagnetic Glass, Fe 81.5 B 14.5 Si 4

January 1, 1984

Author(s)

John Unguris, Daniel T. Pierce, Robert Celotta

… spin-dependent elastic scattering are very sensitive to ion-sputtering damage and to subsequent annealing. The …

Nanoparticle Release from Polymer Nanocomposites Used for Potable Water Infrastructure and Food Packaging: Current Progress & Beyond

Author(s)

Andrew Whelton, T.V. Duncan , J.L. Koontz , Tinh Nguyen

Nanoparticle (NP) enhanced polymers have the potential to revolutionize food packaging and water pipe performance, though release from these materials has gone relatively unstudied. A literature review was conducted to identify potential NP release

H-Bonded Organic Frameworks as Ultrasound-Programmable Delivery Platform

February 5, 2025

Author(s)

Wenliang Wang, Yanshu Shi, Wenrui Chai, Kai Tang, Ilya Pyatnitskiy, Yi Xie, Xiangping Liu, Weilong He, Jinmo Jeong, Ju-Chun Hsieh, Anakaren Lozano, Brinkley Artman, Xi Shi, Nicole Hoefer, Binita Shrestha, Noah Stern, Wei Zhou, David McComb, Tyrone Porter, Graeme Henkelman, Banglin Chen, Huiliang Wang

… explored5,6. Here we present the concept of using porous hydrogen-bonded organic frameworks (HOFs) as toolkits for …

Rapid Removal of IgG1 Carryover on Protease Column Using Protease-Safe Wash Solutions Delivered with LC Pump for HDX-MS Systems

December 23, 2024

Author(s)

Kyle Anderson, Sandeep Kumar

… Sample carryover is a common problem in hydrogen-deuterium exchange mass spectrometry, particularly …

Catalyst Engineering for the Selective Reduction of CO2 to CH4: A First-Principles Study on X-MOF-74 (X = Mg, Mn, Fe, Co, Ni, Cu, Zn)

December 14, 2023

Author(s)

Gavin McCarver, Taner N. Yildirim, Wei Zhou

… cluster. These factors involve less favorable reduction of hydrogen to H2 and strong binding affinities between the Fe …

Direct Visualization of Chemically Resolved Multilayered Domains in Mixed-Linker Metal-Organic Frameworks

June 15, 2023

Author(s)

Andrea Centrone, Belen Lerma-Berlanga, Adam Biacchi, Carmen Fernandez Conde, Georges Pavlidis, Carlos Marti-Gastaldo

… composition and an external shell that consist mainly of hydrogen-bonded linker molecules, rather than a crystalline …

Hidden Complexity in the Chemistry of Ammonolysis-Derived "gamma-Mo2N": An Overlooked Oxynitride Hydride

September 14, 2021

Author(s)

Rick Paul, Shobhit A. Pandey, Chi Zhang, Daniah H. Ibrahim, Elise A. Goldfine, Jill K. Wenderott, Roberto dos Reis, Ionnis Spanopoulos, Mercouri Kanatzidis, Michael J. Bedzyk, Vinayak P. Dravid, Gabriela B. Gonzalez, Sossina M. Haile

… analysis, significant concentrations of oxygen and hydrogen were found in both materials. The stoichiometries …

Solvation Free Energy of Self-Assembled Complexes: Using Molecular Dynamics to Understand the Separation of ssDNA-Wrapped Single-Walled Carbon Nanotubes

June 4, 2020

Author(s)

Kevin R. Hinkle, Frederick R. Phelan Jr.

… We demonstrate that a unique type of intrastrand hydrogen bonding is the most important factor contributing to …

Ultrafast Photodynamics of Cyano-Functionalized [FeFe]-Hydrogenase Model Compounds

April 13, 2018

Author(s)

Christopher J. Stromberg, Edwin J. Heilweil

… [FeFe]-hydrogenases are efficient enzymes that produce hydrogen gas under mild conditions. Synthetic model compounds …

Optimized Separating Acetylene from Carbon Dioxide and Ethylene in a Microporous Material

June 15, 2017

Author(s)

Rui-Biao Lin, Libo Li, Hui Wu, Hadi Arman, Bin Li, Rong-Guang Lin, Wei Zhou, Banglin Chen

… a head-on orientation, breaking the original intra-network hydrogen bonding and subsequently expanding to opened …

Mechanical response of thermally annealed Nafion thin films

December 7, 2016

Author(s)

Bradley R. Frieberg, Kirt A. Page, Joshua R. Graybill, Marlon L. Walker, Gery R. Stafford, Christopher L. Soles

… The proton exchange membranes (PEMs) in a hydrogen fuel cell experiences hundreds if not thousands of …

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