Michael J. Weaver

Vibrational Spectroscopy at Metal-Solution Interfaces: Some Perspectives and Prospects for Electrochemical Surface Science (2006)

Understanding the surface structural changes associated with, and resulting from, the electrochemical formation and removal of oxide films is of broadbased practical as well as fundamental...

Weaver, Michael J., Kizhakevariam, N., Jiang, X., Villegas, I., Stuhlmann, C., Tolia, A., ...

Some recent applications of surface vibrational spectroscopies to electrochemical and related interfacial systems are illustrated by means of studies undertaken in the authors' laboratory. The...

Charge-Dependent Atomic-Scale Structures of High-Index and (110) Gold Electrode Surfaces as Revealed by Scanning Tunneling Microscopy (2006)

Gao, Xiaoping, Edens, Gregory J., Hamelin, Antoinette, Weaver, Michael J.

The atomic and nanoscale structures of high-index gold surfaces in aqueous perchloric acid electrolyte as revealed by in-situ scanning tunneling microscopy (STM) under electrode potential control are...

Some Perspectives on Solution-Phase Electron-Transfer Processes (2006)

Hupp, Joseph T., Weaver, Michael J.

This article presents a selective summary of pertinent issues and a review of experimental inquiries into solution-phase electron transfer processes, with illustrations taken in part from our own...

A New-Type of Long-Range Restructuring of Ordered Metal Surfaces Induced by Lateral Adsorbate Interactions: Iodide on AU(110) Electrodes (2006)

The Adsorption of Sulfate on Gold(111) in Acidic Aqueous Media: Adlayer Structural Inferences from Infrared Spectroscopy and Scanning Tunneling Microscopy (2006)

A new form of long-range surface restructuring of Au(110) is reported, specifically for Au(110) in aqueous iodide electrolyte at high electrode potentials where an ordered iodide adlayer is present....

Gao, Xiaoping, Weaver, Michael J., Edens, Gregory J.

The potential-dependent adsorption of sulfate on ordered Au(111) from acidic aqueous electrolytes has been examined in-situ by means of infrared reflection-absorption spectroscopy (IRAS) and by...

Solvent Dynamical Effects in Electron Transfer: Molecular Dynamics Simulations of Reactions in Methanol (2006)

Phelps, Donald K., Weaver, Michael J., Ladanyi, Branka M.

Molecular-dynamics simulations of activated electron-transfer (ET) reactions in methanol have been undertaken in order to explore the physical nature of the solvent dynamics coupled to ET barrier...

Charge-Induced (1 x 3) Reconstruction of Au(110): Mechanistic Insights from Potentiodynamic Scanning Tunneling Microscopy in Alkali Iodide Electrolytes (2006)

Sensitivity of Electrochemical Adlayer Structure to the Metal Crystallographic Orientation: Potential-Dependent Iodide Adsorption on Au(100) in Comparison with Other Low-Index Surfaces (2006)

The nature of the local atomic-level and nanoscale structural changes associated with the charge-induced (1 x 3) reconstruction on Au(110) in alkali iodide electrolytes is explored by means of...

Gao, Xiaoping, Edens, Gregory J., Liu, Fan-Chen, Weaver, Michael J.

The potential-dependent ordered atomic structures formed for iodide adsorption on Au(100) from dilute aqueous alkali iodide electrolytes as discerned by means of in-situ scanning tunneling microscopy...

Scanning Tunneling Microscopy and Infrared Spectroscopy as Combined In- Situ Probes of Electrochemical Adlayer Structure: Cyanide on PT(111) (2006)

Stuhlmann, Christopher, Villegas, Ignacio, Weaver, Michael J.

The spatial structure of irreversibly adsorbed cyanide adlayers on a Pt(111) electrode is deduced by means of in-situ scanning tunneling microscopy (STM) combined with infrared reflection-absorption...

Influence of Adsorbed Hydroxyl and Carbon Monoxide on Potential-Induced Reconstruction of Au(100) as Examined by Scanning Tunneling Microscopy (2006)

Gao, Xiaoping, Weaver, Michael J., Edens, Gregory J., Markovic, N. M., Ross, P. N.

The potential-dependent hexagonal ( hex ) reconstruction of ordered Au(100) in an alkaline electrolyte, 0.1 M KOH, has been examined by means of in- situ scanning tunneling microscopy. In harmony...

A Tandem Microscopic-Electrochemical Examination of A Charge-Induced Surface Phase Sequence: Ordered Au(110) in Aqueous Iodide Electrolytes as Probed by Potentiodynamic Scanning Tunneling Microscopy (2006)

Gao, Xiaoping, Edens, Gregory J., Weaver, Michael J.

Atomic-level structural and dynamical aspects of the electrode potential-induced sequence of surface phases on ordered Au(110) in dilute aqueous alkali iodide electrolytes have been explored by...

Some Perspectives on Solution-Phase Electron-Transfer Processes (2006)

Hupp, Joseph T., Weaver, Michael J.

The kinetics of electron-transfer (ET) process is a subject graced by a remarkable diversity as well as importance in chemistry and biology. Of the manifold types of chemical ET reactions, those...

Real-Space Formation and Dissipation Dynamics of Hexagonal Reconstruction on Au(100) in Aqueous Media as Explored by Potentiodynamic Scanning Tunneling Microscopy (2006)

Gao, Xiaoping, Edens, Gregory J., Hamelin, Antoinette, Weaver, Michael J.

The electrode potential-induced formation and dissipation dynamics of the hexagonal ('hex') reconstruction on ordered Au(100) in perchloric and sulfuric acid electrolytes has been studied by means of...

A Device for Computer-Controlled Potential Modulation in Electrochemical Fourier Transform Infrared Spectroscopy (2003)

Corrigan, Dennis S., Milner, David, Weaver, Michael J.

A circuit has been designed for the automatic control of potential modulation for subtractively normalized interfacial Fourier transform infrared spectroscopy (SNIFTIRS) using an IBM IR/90 series...

Surface-Enhanced Raman Spectroscopy as a Probe or Adsorbate-Surface Bonding: Benzene and Monosubstituted Benzenes Adsorbed at Gold Electrodes (2003)

Gao, Ping, Weaver, Michael J.

Surface-enhanced Raman spectra of benzene and eight mono substituted benzenes adsorbed at gold electrodes have been examined in order to probe the nature of adsorbate-surface bonding for simple...

The Role of Solvent Reorganization Dynamics in Electron-Transfer Processes. Theory-Experiment Comparisons for Electrochemical and Homogeneous Electron Exchange Involving Metallocene Redox Couples (2003)

Gennett, Thomas, Milner, David F., Weaver, Michael J.

Electrochemical Rate Constants and Activation Parameters are reported for the electron exchange of five metallocene couples and dibenzenechromium (I)/ (O) in eight solvents at mercury electrodes. The...

Comparison Between Surface-Enhanced Raman and Surface Infrared Spectroscopies For Strongly Perturbed Adsorbates: Thiocyanate at Gold Electrodes (2003)

Corrigan, Dennis S., Foley, John K., Gao, Ping, Pons, Stanley, Weaver, Michael J.

The potential-dependent C-N stretching mode, v sub CN, for thiocyanate adsorbed at the gold-aqueous interface is examined by both surface- enhanced Raman spectroscopy (SERS) and subtractively...

Solvent Isotope Effects Upon the Kinetics of some Simple Electrode Reactions. (2002)

Weaver,Michael J., Tyma,Paul D., Nettles,Scott M.

The effect of replacing H2O with D2O solvent upon the electrochemical kinetics of simple transition-metal redox couples containing aquo, ammine, or ethylenediamine ligands have been investigated at...

On the Deficiencies of the Ferricinium-Ferrocene Redox Couple for Estimating Transfer Energies of Single Ions. (2002)

Entropic and Enthalpic Contributions to the Solvent Dependence of the Thermodynamics of Transition-Metal Redox Couples. I. Couples Containing Aromatic Ligands. (2002)

The difference between the partial molal entropies of ferrocene and ferricinium has been determined in nine solvents from the temperature dependence of the formal potential of the...

Entropic and Enthalpic Contributions to the Solvent Dependence of the Thermodynamics of Transition-Metal Redox Couples II. Couples Containing Ammine and Ethylenediamine Ligands. (2002)

Variations in the solvent medium are generally expected to yield profound changes in the thermodynamics and kinetics of electron transfer reactions. The origins of the observed solvent effects are...

Solvent Effects on the Kinetics of Simple Electrochemical Reactions. I. Comparison of the Behavior of Co(III)/(II) Trisethylenediamine and Ammine Couples with the Predictions of Dielectric Continuum Theory. (2002)

We have been examining the solvent dependence of the thermodynamics of simple transition-metal redox couples as part of an experimental program exploring the role of the solvent in the kinetics and...

Some Comparisons between the Energetics of Electrochemical and Homogeneous Electron-Transfer Reactions. (2002)

The electroreduction kinetics of Co(en)3(3+) (en = enthylenediamine), Co(NH3)6(3+), and Co(NH3)5F(2+) have been investigated at mercury electrodes in aqueous solution and six nonaqueous solvents in...

Weaver,Michael J., Hupp,Joseph T.

Some conceptual relationships between the kinetics of corresponding electrochemical and homogeneous redox processes are discussed and applied to experimental data for suitable outer-sphere reactions...

Electron Exchange between Bis(eta(6)-Arene) Chromium(I) and Bis(eta(6)- Arene) Chromium(O). Comparisons between Experimental and Calculated Kinetics Parameters (2002)

Li, Tomi T-T., Weaver, Michael J., Brubaker Jr, Carl H.

Comparisons have been made between kinetics parameters for the self exchange of (eta(6)-arene)2Cr(I)/(eta(6)-arene)2Cr(O) (where arene = benzene, toluene, methoxylbenzene, biphenyl, ethylbenzoate and...

The Significance of Electrochemical Activation Parameters for Surface-Attached Reactants. (2002)

Hupp,Joseph T., Weaver,Michael J.

The interpretation of activation parameters for electrochemical reactions involving surface-attached or adsorbed reactants is considered, and compared with the corresponding experimental quantities...

A Parallel Simulation Scheme for the Rapid Accurate Calculation of Nonideal Electrochemical Transients. (2002)

Schindler,Edward W. , Jr., Weaver,Michael J.

A method for the digital simulation of certain electrochemical transients has been developed which involves the parallel calculation of a system of interest and an ideal analog to which an exact...

Specific Adsorption of Halide and Pseudohalide Ions at Electrochemically Roughened Versus Smooth Silver-Aqueous Interfaces. (2002)

Hupp,Joseph T., Larkin,D., Weaver,Michael J.

The differential capacitance of electrochemically roughened silver surfaces in mixed perchlorate electrolytes containing chloride, bromide, iodide, thiocyanate, or azide anions has been measured as a...

The Frequency Factor for Outer-Sphere Electrochemical Reactions. (2002)

Hupp,Joseph T., Weaver,Michael J.

The conventional formulation of the frequency factor (A sub (n)(e) for outer-sphere electrochemical reactions based on a 'collisional' model is compared with an alternative 'encounter preequilibrium'...

Comparisons between Theoretical and Experimental Deuterium Isotope Effects for Some Outer-Sphere Electrochemical Reactions. (2002)

Weaver,Michael J., Li,Tomi T.-T.

Experimental deuterium isotope effects upon the rates of outer-sphere electrochemical exchange reactions involving aquo and ammine complexes are compared with the predictions of contemporary theories...

Observation of a Reversible Adsorbed Redox Couple Using Surface-Enhanced Raman Scattering: Pentaamminepyridineosmium(III)/(II) at Silver Electrodes. (2002)

Farquharson,Stuart, Weaver,Michael J., Lay,Peter A., Magnuson,Roy H., Taube,Henry

Surface-enhanced Raman scattering (SERS) has been observed for pentaamminepyridineosmium(III) adsorbed at a silver electrode as a function of electrode potential in order to examine the molecular...

Some Applications of Surface Raman and Infrared Spectroscopies to Mechanistic Electrochemistry Involved Adsorbed Species. (1998)

Weaver, Michael J., Corrigan, D. S., Gao, P., Gosztola, D., Leung, L. W.

Some methods are outlined by which surface-enhanced Raman spectroscopy (SERS) and infrared reflection-absorption spectroscopy (IRRAS) can be applied to gain mechanistic information for multistep...

Reduction Pathways of Cyclooctatetraene Iron Tricarbonyl as Examined Using Infrared Spectroelectrochemistry. (1998)

Golovin, M. N., Weaver, Michael J.

The nature of the redox-induced structural changes of cyclooctatetraene iron tricarbonyl are explored using fourier transform infrared spectroelectrochemistry. The results provide a simple...

The Orbital-Overlap Factor in Electron Transfer. Sensitivity of Homogeneous Self-Exchange Kinetics for Some Metallocenes to Electronic Structure. (1998)

Nielson, Roger M., Golovin, M. N., McManis, George E., Weaver, Michael J.

Rate constants, k(h)(ex), for the electron self exchange of cobaltocenium-cobaltocene, Cp2Co(+/o), and for the decamethyl derivative (Cp-Me5)2Co(+/0) obtained by using the NMR line broadening...

Electrosorptive Detection Based on Double-Layer Capacitance for Selective Anion Monitoring in Ion Chromatography. 1. Mercury Electrodes. (1998)

Ramstad, Tore, Weaver, Michael J.

A novel scheme is presented for the detection of selected anions in ion chromatography based on changes in differential double-layer capacitance, Delta C sub d, for a metal electrode at a suitable...

Solvent Relaxation in Thermal Electron-Transfer Reactions: Some Comparisons with Real-Time Measurements of Solvation Dynamics. (1998)

McManis, George E., Weaver, Michael J.

The role of solvent dielectric relaxation on the barrier-crossing dynamics for outersphere electron transfer (ET), as evaluated from the solvent-dependent kinetics of metallocene self-exchange...

The Influence of Uncompensated Solution Resistance on the Determination and Standard Electrochemical Rate Constants Using Cyclic Voltammetry, and Some Comparisons with AC Voltammetry. (1998)

Milner, David F., Weaver, Michael J.

A digital simulation analysis is presented of the deleterious effects of uncompensated solution resistance, Rus, upon the evaluation of standard rate constants, k2ob, using cyclic voltammetry. The...

Intervalence Electron Transfer in Bicobaltocene Cations: Comparison with Biferrocenes. (1998)

McManis, George E., Nielson, Roger M., Weaver, Michael J.

The near-infrared absorption parameters for bicobaltocene monocation, (Cp2Co)2+, evaluated in several solvents, are compared with corresponding data for biferrocene cation, (Cp2Fe)2+, in order to...

Comparisons between Surface-Enhanced Raman and Surface Infrared Spectroscopies for Strongly Perturbed Adsorbates: Thiocyanate at Gold Electrodes. (1998)

Pons, Stanley, Corrigan, Dennis S., Foley, John K., Gao, Ping, Weaver, Michael J.

The potential-dependent C-N stretching mode, for thiocyanate adsorbed at the gold aqueous interface is examined by both surface enhanced Raman spectroscopy (SERS) and subtractively normalized...

The Role of Solvent Dynamics in Electron Transfer: Electrochemical Exchange Kinetics of Cobalt Clathrochelates as a Probe of Reactant Vibrational Effects. (1998)

Nielson, Roger M., Weaver, Michael J.

Rate constants for electrochemical exchange, k(ex), have been measured for the cobalt clathrochelate couples Co(dmg) 3 (BF) 2(+/0) and Co(dmg) 3 (BC4H9) 2(+/0) (dmg=double deprotonated...

The Combined Influences of Solution Resistance and Charge-Transfer Kinetics on Microelectrode Cyclic Voltammetry. (1998)

Safford, Lance K., Weaver, Michael J.

The effects of heterogeneous kinetics on cyclic voltammograms at microdisk electrodes are examined by digital simulation. The increased diffusive efficiency at microelectrodes raises the upper limit...

Solvent Relaxation in Electron-Transfer Reactions: Comparisons between Barrier-Crossing Dynamics in Water and Polar Aprotic Media. (1998)

Nielson, Roger M., McManis, George E., Weaver, Michael J.

Rate constants, k sub ex, for electron self exchange of three metallocene redox couples, carboxymethyl (cobaltocenium-cobaltocene) CpCO2Me2)2Co+o, hydroxymethyl (ferrocenium-ferrocene) (Cp (dot)...

Solvent Effects on Intervalence Electron-Transfer Energies for Biferrocene Cations: Comparisons with Molecular Models of Solvent Reorganization. (1998)

McManis, George E., Gochev, Alexander, Nielson, Roger M., Weaver, Michael J.

Outer-shell electron-transfer reorganization energies, lambda sub O, as evaluated from intervalence band maxima, E sub op, for biferrocenylacetylene (BFA+), 1,4-biferrocenylbutadiyne (BFB+), and...

Budget Formulation: A Guide for the Navy Field Activity Comptroller. (1998)

Atomic-Level Structure and Dynamics of Ordered Metal Electrodes as Probed by Infrared Spectroscopy and Scanning Tunneling Microscopy. (1998)

This thesis examines the role of the Navy field activity comptroller in the budget formulation process. It contains practical ideas, concepts and comments regarding budget formulation by experienced...

Jiang, Xudong, Weaver, Michael J.

Some recent applications of in-situ surface spectroscopy and scanning tunneling microscopy (STM) to the adsorption and reaction of small molecules on monocrystalline metal surfaces in electrochemical...

The Evaluation of Rate Constants for Rapid Electrode Reactions by Using Microelectrode Voltammetry: Virtues of Measurement at Lower Temperature. (1998)

Safford, Lance K., Weaver, Michael J.

The prospects of utilizing electrochemical kinetic measurements at lower temperatures for evaluating reliably the standard rate constants, ks, of rapid redox couples in nonaqueous media, specifically...

Surface Crystallographic Dependence of Voltammetric Oxidation of Polyhydric Alcohols and Related Systems at Monocrystalline Gold-Acidic Aqueous Interfaces. (1998)

Hamelin, Antoinette, Ho, Yeunghaw, Chang, Si-Chung, Gao, Xiaoping, Weaver, Michael J.

The voltammetric oxidation in aqueous 0.1 M perchloric acid of four polyhydric alcohols, ethylene glycol, glycerol, meso-erythritol, and d-mannitol, on seven oriented gold surfaces is reported with...

Dynamical Solvent Effects on Activated Electron-Transfer Reactions: Principles, Pitfalls, and Progress. (1998)

The Emergence of Atomic-Level Structural Information for Ordered Metal-Solution Interfaces: Some Recent Contributions from In-Situ Infrared Spectroscopy and Scanning Tunneling Microscopy. (1998)

Recent experimental and conceptual progress in our understanding of dynamical solvent effects in activated electron-transfer processes are critically reviewed. Understanding the various influences...

Gao, Xiaoping, Chang, Si-Chung, Jiang, Xudong, Hamelin, Antoinette, Weaver, Michael J.

The utilization of infrared reflection-absorption spectroscopy (IRAS) and scanning tunneling microscopy (STM) to extract atomic-resolution information for ordered metal-solution interfaces in a...

Initial Surface Structure of Flame-Annealed Au(100) in Aqueous Solution: Consistency Between In-Situ Scanning Tunneling Microscopy and Electrochemical Results. (1998)

Hamelin, Antoinette, Gao, Xiaoping, Weaver, Michael J.

The aim of this note is to clarify the initial superficial structure of gold electrodes following the commonly utilized flame-annealing pretreatment procedure, by using atomic - resolution scanning...

Role of the Double-Layer Cation on the Potential-Dependent Stretching Frequencies and Binding Geometries of Carbon Monoxide at Platinum-Nonaqueous Interfaces. (1998)

Roth, Joseph D., Weaver, Michael J.

The influences of the double-layer cation upon the electrode potential-dependent infrared spectral properties of saturated CO adlayers on polycrystalline platinum have been examined in acetonitrile,...

Electrostatic-Field Effects on Adsorbate Bonding and Structure at Metal Surfaces: Parallels Between Electrochemical and Vacuum Systems. (1998)

Probing Electrochemical Adsorbate Structure and Reactions with In-Situ Atomic-Resolution Scanning Microscopy: Some Progress and Prospects. (1998)

The observed effects of varying the surface potential, and hence the accompanying electrostatic fields, upon adsorbate bonding at ordered monocrystalline metals in electrochemical environments are...

Molecular Capacitance: Sequential Electron-Transfer Energetics for Solution-Phase Metallic Clusters in Relation to Gas-Phase Clusters and Analogous Interfaces. (1998)

Some prospects for applying scanning tunneling microscopy (STM) as an in-situ atomic-resolution probe of adlayer structure at ordered metal-solution interfaces are considered with respect to both...

Weaver, Michael J., Gao, Xiaoping

A simple electrostatic treatment of the energetics of sequential solution-phase electron transfers involving metallic clusters and other large solutes is outlined and related to the conventional...

Solvent Dynamical Effects in Electron Transfer: Electrochemical-Exchange Kinetics of Sesquibicyclic Hydrazines as a Probe of Coupled Vibrational Activation. (1998)

Phelps, Donald K., Ramm, Michael T., Wang, Yichun, Nelson, Stephen F., Weaver, Michael J.

Rate constants for electrochemical exchange of three sesquibicyclic hydrazine-radical cation redox couples, k(e)(ex), obtained at mercury by means of phase-selective ac voltammetry, are reported in...

Probing Redox-Induced Molecular Transformations by Atomic-Resolution Scanning Tunneling Microscopy: Iodide Adsorption and Electrooxidation on Au(111) in Aqueous Solution. (1998)

Molecular Solvent-Dynamical Effects on Activated Electron-Transfer Kinetics: How Important is Solvent Friction? (1998)

In-situ atomic-resolution scanning tunneling microscopy (STM) has been utilized on ordered Au(lll) under electrode potential control in acidic aqueous solution to examine iodine adlayer structures...

Electrode Potential-Induced Reconstruction of Au(100): Effect of Chemisorption of Nanoscale Dynamics as Probed by In-Situ Scanning Tunneling Microscopy, (1998)

The likely extent of retardation exerted by solvent friction upon the rates of activated electron-transfer (ET) processes is explored and evaluated with reference to some extent solvent-dependent...

Surface-Enhanced Raman Spectroscopy of Electroactive Films of C60 and an Ir-C60 Complex on Gold: Symmetry Lowering, Electron Localization, and Counteraction Effects. (1998)

The effect of iodide chemisorption on the nanoscale real-space dynamics associated with the electrode potential-induced formation and removal of the hexagonal reconstruction on Au(100) in aqueous...

Zhang, Yun, Du, Yuhua, Shapley, John R., Weaver, Michael J.

Surface-enhanced Raman (SER) spectra are reported for thin films of C60 and (eta 5-C9H7)Ir(CO)(eta2-C60) on gold electrodes in acetonitrile. The latter spectra display the hallmarks of vibrational...

Some Electrochemical Consequences of Potential-Induced Surface Reconstruction on Au(100): Double-Layer Nonuniformity and Electrode Kinetics. (1998)

Hamelin, Antoinette, Stoicoviciu, Livia, Edens, Gregory J., Gao, Xiaoping, Weaver, Michael J.

Some consequences of potential-induced surface reconstruction upon the double-layer structure and electrocatalytic properties of Au(100) in aqueous perchloric acid have been explored by means of...

In-Situ Electrochemical Surface Science. (1998)

Weaver, Michael J., Gao, Xiaoping

The study of electrochemical interfaces is a pursuit almost as diverse as it is venerable. The characterization of such systems, especially for metals in contact with electrolyte solutions, was...

A survival model for estimating environmental effects /--by Michael J. Weaver. (1998)

Budget formulation :--a guide for the Navy field activity comptroller /--by Michael J. Weaver. (1989)

Thesis (M.S.)--Utah State University. Dept. of Mathematics and Statistics, 1998.