Tod A. Pascal
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View article: Surface structure of water from soft X-ray second harmonic generation
Surface structure of water from soft X-ray second harmonic generation Open
The microscopic structure of water’s surface is crucial to many natural and industrial processes, but studying its hydrogen bond (H-bond) network directly remains challenging due to the required interfacial sensitivity of experimental tech…
View article: Spectroscopic Determination of Site-Selective Ligand Binding on Single Anisotropic Nanocrystals
Spectroscopic Determination of Site-Selective Ligand Binding on Single Anisotropic Nanocrystals Open
Organic surface ligands are integral components of nanocrystals and nanoparticles that have a strong influence on their physicochemical properties, their interaction with the environment, and their ability to self-assemble and order into h…
View article: Spectroscopic Determination of Site-Selective Ligand Binding on Single Anisotropic Nanocrystals
Spectroscopic Determination of Site-Selective Ligand Binding on Single Anisotropic Nanocrystals Open
Organic surface ligands are integral components of nanocrystals and nanoparticles that have a strong influence on their physicochemical properties, their interaction with the environment, and their ability to self-assemble and order into h…
View article: Quantifying the Effect of Intermonomer Improper Angles on Electron Delocalization in Conjugated Polymers
Quantifying the Effect of Intermonomer Improper Angles on Electron Delocalization in Conjugated Polymers Open
Electron delocalization between monomers in conjugated polymers influences both the charge transport and the mechanical properties of this class of materials. While this delocalization is generally understood to be maximized by coplanar mo…
View article: Single-Molecule Vibrational Characterization of Binding Geometry Effects on Isocyanide–Metal Interactions
Single-Molecule Vibrational Characterization of Binding Geometry Effects on Isocyanide–Metal Interactions Open
Isocyanide-metal binding is governed by σ-donation and π-back-bonding, which affects the isocyanide stretching energy, a characteristic probe for ligand-metal interactions. While extensive correlations exist between structure and spectrosc…
View article: Mechanism of Cationic Peptide‐Induced Assembly of Gold Nanoparticles: Modulation of Electrostatic Repulsion
Mechanism of Cationic Peptide‐Induced Assembly of Gold Nanoparticles: Modulation of Electrostatic Repulsion Open
The aggregation of plasmonic nanoparticles can lead to new and controllable properties useful for numerous applications. We recently showed the reversible aggregation of gold nanoparticles (AuNPs) via a small, cationic di‐arginine peptide;…
View article: Single-Molecule Vibrational Characterization of Binding Geometry Effects on Isocyanide-Metal Interactions
Single-Molecule Vibrational Characterization of Binding Geometry Effects on Isocyanide-Metal Interactions Open
Isocyanide-metal binding is governed by sigma-donation and pi-back-bonding, which affects the energy of the isocyanide stretching mode-a characteristic probe for ligand-metal interactions. While extensive correlations exist between structu…
View article: Molecular-Scale Insights into the Heterogeneous Interactions between an <i>m</i>-Terphenyl Isocyanide Ligand and Noble Metal Nanoparticles
Molecular-Scale Insights into the Heterogeneous Interactions between an <i>m</i>-Terphenyl Isocyanide Ligand and Noble Metal Nanoparticles Open
The structural and chemical properties of metal nanoparticles are often dictated by their interactions with molecular ligand shells. These interactions are highly material-specific and can vary significantly even among elements within the …
View article: Mechanism of Cationic Peptide-Induced Assembly of Gold Nanoparticles: Modulation of Electrostatic Repulsion
Mechanism of Cationic Peptide-Induced Assembly of Gold Nanoparticles: Modulation of Electrostatic Repulsion Open
The aggregation of plasmonic nanoparticles can lead to new and controllable properties useful for numerous applications. We recently showed the reversible aggregation of gold nanoparticles (AuNPs) via a small, cationic di-arginine peptide;…
View article: Facile Li-Ion Transport via LLTO Scaffold with Crosslinked Polyethylene Glycol Composite Electrolyte for Solid-State Batteries
Facile Li-Ion Transport via LLTO Scaffold with Crosslinked Polyethylene Glycol Composite Electrolyte for Solid-State Batteries Open
View article: Structure-Activity Relationships in Ether-Functionalized Solid-State Metal-Organic Framework Electrolytes
Structure-Activity Relationships in Ether-Functionalized Solid-State Metal-Organic Framework Electrolytes Open
The structure-property relationships of metal-organic framework (MOF) based solid-state electrolytes are not well understood. Herein, a systematic investigation of twelve Zr(IV)-based UiO-66 MOFs with varying ether-chain functional groups …
View article: Structure-Activity Relationships in Ether Functionalized, Solid-State Metal-Organic Framework Electrolytes
Structure-Activity Relationships in Ether Functionalized, Solid-State Metal-Organic Framework Electrolytes Open
The structure-property relationships of metal-organic framework (MOF) based solid-state electrolytes are not well understood. Herein, a systematic investigation of twelve Zr(IV)-based UiO-66 MOFs with varying ether-chain functional groups …
View article: Molecular-Scale Insights into the Heterogeneous Interactions Between an m-Terphenyl Isocyanide Ligand and Noble Metal Nanoparticles
Molecular-Scale Insights into the Heterogeneous Interactions Between an m-Terphenyl Isocyanide Ligand and Noble Metal Nanoparticles Open
The structural and chemical properties of metal nanoparticles are often dictated by their interactions with molecular ligand shells. These interactions are highly material-specific and can vary significantly even among elements within the …
View article: Molecular-Scale Visualization of Steric Effects of Ligand Binding to Reconstructed Au(111) Surfaces
Molecular-Scale Visualization of Steric Effects of Ligand Binding to Reconstructed Au(111) Surfaces Open
Direct imaging of single molecules at nanostructured interfaces is a grand challenge with potential to enable new, precise material architectures and technologies. Of particular interest are the structural morphology and spectroscopic sign…
View article: Toward a quantitative interfacial description of solvation for Li metal battery operation under extreme conditions
Toward a quantitative interfacial description of solvation for Li metal battery operation under extreme conditions Open
The future application of Li metal batteries (LMBs) at scale demands electrolytes that endow improved performance under fast-charging and low-temperature operating conditions. Recent works indicate that desolvation kinetics of Li + plays a…
View article: Goldilocks Energy Minimum: Peptide-Based Reversible Aggregation and Biosensing
Goldilocks Energy Minimum: Peptide-Based Reversible Aggregation and Biosensing Open
Colorimetric biosensors based on gold nanoparticle (AuNP) aggregation are often challenged by matrix interference in biofluids, poor specificity, and limited utility with clinical samples. Here, we propose a peptide-driven nanoscale disass…
View article: Molecular-Scale Visualization of Steric Effects of Ligand Binding to Reconstructed Au(111) Surfaces
Molecular-Scale Visualization of Steric Effects of Ligand Binding to Reconstructed Au(111) Surfaces Open
Direct imaging of single molecules at nanostructured interfaces is a grand challenge, with potential to enable new, precise material architectures and technologies. Of particular interest are the structural morphology and spectroscopic sig…
View article: Probing lithium mobility at a solid electrolyte surface
Probing lithium mobility at a solid electrolyte surface Open
View article: Electronic signatures of Lorentzian dynamics and charge fluctuations in lithiated graphite structures
Electronic signatures of Lorentzian dynamics and charge fluctuations in lithiated graphite structures Open
View article: Active States During the Reduction of CO <sub>2</sub> by a MoS <sub>2</sub> Electrocatalyst
Active States During the Reduction of CO <sub>2</sub> by a MoS <sub>2</sub> Electrocatalyst Open
Transition-metal dichalcogenides (TMDCs) such as MoS2 are Earth-abundant catalysts that are attractive for many chemical processes, including the carbon dioxide reduction reaction (CO2RR). While many studies have correlated synt…
View article: Electronic signatures of Lorentzian dynamics and charge fluctuations in lithiated graphite structures
Electronic signatures of Lorentzian dynamics and charge fluctuations in lithiated graphite structures Open
Data source for work in Nature Communications Electronic signatures of Lorentzian dynamics and charge fluctuations in lithiated graphite structures
View article: Electronic signatures of Lorentzian dynamics and charge fluctuations in lithiated graphite structures
Electronic signatures of Lorentzian dynamics and charge fluctuations in lithiated graphite structures Open
Data source for work in Nature Communications Electronic signatures of Lorentzian dynamics and charge fluctuations in lithiated graphite structures
View article: Electronic signatures of Lorentzian dynamics and charge fluctuations in lithiated graphite structures
Electronic signatures of Lorentzian dynamics and charge fluctuations in lithiated graphite structures Open
Data source for work in Nature Communications Electronic signatures of Lorentzian dynamics and charge fluctuations in lithiated graphite structures
View article: Nanoscale Surface Structure of Nanometer-Thick Ferroelectric BaTiO<sub>3</sub> Films Revealed by Synchrotron X-ray Scanning Tunneling Microscopy: Implications for Catalytic Adsorption Reactions
Nanoscale Surface Structure of Nanometer-Thick Ferroelectric BaTiO<sub>3</sub> Films Revealed by Synchrotron X-ray Scanning Tunneling Microscopy: Implications for Catalytic Adsorption Reactions Open
Ferroelectric nanomaterials are of interest in catalysis, non-volatile memory, and neuromorphic computing among other applications because of their switchable structure that can alter electronic and interface properties of a single materia…
View article: Agglomeration Drives the Reversed Fractionation of Aqueous Carbonate and Bicarbonate at the Air-water Interface
Agglomeration Drives the Reversed Fractionation of Aqueous Carbonate and Bicarbonate at the Air-water Interface Open
In the course of our investigations of the adsorption of ions to the air-water interface, we previously reported the surprising result that doubly-charged carbonate anions exhibit a stronger surface affinity than do singly-charged bicarbon…
View article: Investigation of local distortion effects on X-ray absorption of ferroelectric perovskites from first principles simulations
Investigation of local distortion effects on X-ray absorption of ferroelectric perovskites from first principles simulations Open
We investigate ferroelectric local distortion in BaTiO 3 with two widely used computational approaches with different treatments of many-body excitation effects.
View article: Molecular Insights Into the Physics of Poly(amidoamine)-Dendrimer-Based Supercapacitors
Molecular Insights Into the Physics of Poly(amidoamine)-Dendrimer-Based Supercapacitors Open
Increasing the energy density in electric double-layer capacitors (EDLCs), also known as supercapacitors, remains an active area of research. Specifically, there is a need to design and discover electrode and electrolyte materials with enh…
View article: Molecular insights into the physics of poly(amidoamine)-dendrimer-based supercapacitors
Molecular insights into the physics of poly(amidoamine)-dendrimer-based supercapacitors Open
Increasing the energy density in electric double layer capacitors (EDLCs), also known as supercapacitors, remains an active area of research. Specifically, there is a need to design and discover electrode and electrolyte materials with enh…
View article: Oxidative Stabilization of Dilute Ether Electrolytes Via Anion Modification
Oxidative Stabilization of Dilute Ether Electrolytes Via Anion Modification Open
State of the art Li metal batteries typically rely on ether electrolytes with high salt concentration and/or fluorinated solvents to enable stable cycling. Their high manufacturing costs at scale have motivated us to consider dilute, non-f…
View article: Saturable Absorption of Free-Electron Laser Radiation by Graphite near the Carbon K-Edge
Saturable Absorption of Free-Electron Laser Radiation by Graphite near the Carbon K-Edge Open
The interaction of intense light with matter gives rise to competing nonlinear responses that can dynamically change material properties. Prominent examples are saturable absorption (SA) and two-photon absorption (TPA), which dynamically i…