Dmitri N. Zakharov
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View article: Atomically Revealing Bulk Point Defect Dynamics in Hydrogen‐Driven γ‐Fe<sub>2</sub>O<sub>3</sub> → Fe<sub>3</sub>O<sub>4</sub> → FeO Transformation
Atomically Revealing Bulk Point Defect Dynamics in Hydrogen‐Driven γ‐Fe<sub>2</sub>O<sub>3</sub> → Fe<sub>3</sub>O<sub>4</sub> → FeO Transformation Open
Understanding how point defects in the bulk govern redox transformations is essential for advancing hydrogen‐based metal production and designing high‐performance oxide materials. This study reveals the atomic‐scale mechanisms driving hydr…
View article: Nanometer-scale resolution in an ultra-high pressure environmental TEM holder
Nanometer-scale resolution in an ultra-high pressure environmental TEM holder Open
Environmental Transmission Electron Microscopy gas holders are vital for studying catalyst nanostructures in reactive gases. Although there are existing methods to understand the behavior of catalysts during reaction, a “pressure gap” exis…
View article: Development of sensing and control algorithms for collaborative mobile robots with hybrid holonomy
Development of sensing and control algorithms for collaborative mobile robots with hybrid holonomy Open
The development of control and sensing algorithms for collaborative mobile robots with hybrid holonomy is discussed. A mobile platform with a roller locking device providing transition between omnidirectional and all-wheel drive modes is c…
View article: Visualizing Size-Dependent Dynamics of CeO<sub>2−δ</sub>{100}-Supported CoO<sub><i>x</i></sub> Nanoparticles Under CO<sub>2</sub> Hydrogenation Conditions
Visualizing Size-Dependent Dynamics of CeO<sub>2−δ</sub>{100}-Supported CoO<sub><i>x</i></sub> Nanoparticles Under CO<sub>2</sub> Hydrogenation Conditions Open
Carbon dioxide is a major greenhouse gas. In order to optimize processes focused on its chemical valorization, one needs detailed information about the effects of CO2 and/or CO2/H2 mixtures on the structure…
View article: Machine‐Learning‐Driven Exploration of Surface Reconstructions of Reduced Rutile TiO <sub>2</sub>
Machine‐Learning‐Driven Exploration of Surface Reconstructions of Reduced Rutile TiO <sub>2</sub> Open
Titanium dioxide (TiO 2 ) is widely used as a catalyst support due to its stability, tunable electronic properties, and surface oxygen vacancies, which are crucial for catalytic processes such as the reverse water‐gas shift (RWGS) reaction…
View article: Machine‐Learning‐Driven Exploration of Surface Reconstructions of Reduced Rutile TiO <sub>2</sub>
Machine‐Learning‐Driven Exploration of Surface Reconstructions of Reduced Rutile TiO <sub>2</sub> Open
Titanium dioxide (TiO 2 ) is widely used as a catalyst support due to its stability, tunable electronic properties, and surface oxygen vacancies, which are crucial for catalytic processes such as the reverse water‐gas shift (RWGS) reaction…
View article: Machine-Learning-Driven Exploration of Surface Reconstructions of Reduced Rutile TiO2
Machine-Learning-Driven Exploration of Surface Reconstructions of Reduced Rutile TiO2 Open
Titanium dioxide (TiO2) is widely used as catalyst support due to its stability, tunable electronic properties, and surface oxygen vacancies, which are crucial for catalytic processes such as the reverse water-gas shift (RWGS) reaction. Re…
View article: Surface Self-Diffusion Induced Sintering of Nanoparticles
Surface Self-Diffusion Induced Sintering of Nanoparticles Open
Despite the critical role of sintering phenomena in constraining the long-term durability of nanosized particles, a clear understanding of nanoparticle sintering has remained elusive due to the challenges in atomically tracking the neck in…
View article: Atomic-Scale Visualization of Surface Segregation and Ordering of Pt in a Dilute Cu(Pt) Alloy under a Hydrogen Atmosphere
Atomic-Scale Visualization of Surface Segregation and Ordering of Pt in a Dilute Cu(Pt) Alloy under a Hydrogen Atmosphere Open
Surface segregation is a common phenomenon in alloys exposed to reactive atmospheres, yet the atomic mechanisms underlying surface structure and composition dynamics remain largely unexplored. Using a combination of environmental transmiss…
View article: Tracking the dynamics of catalytic Pt/CeO2 active sites during water-gas-shift reaction
Tracking the dynamics of catalytic Pt/CeO2 active sites during water-gas-shift reaction Open
View article: Elucidating the Mechanism of Iron‐Catalyzed Graphitization: The First Observation of Homogeneous Solid‐State Catalysis
Elucidating the Mechanism of Iron‐Catalyzed Graphitization: The First Observation of Homogeneous Solid‐State Catalysis Open
Carbon is a critical material for existing and emerging energy applications and there is considerable global effort in generating sustainable carbons. A particularly promising area is iron‐catalyzed graphitization, which is the conversion …
View article: Atomic-Scale Dynamics of the Initial Stages of Cu and Cu Alloy Oxidation
Atomic-Scale Dynamics of the Initial Stages of Cu and Cu Alloy Oxidation Open
View article: In Situ Monitoring of Non-Thermal Plasma Cleaning of Surfactant Encapsulated Nanoparticles
In Situ Monitoring of Non-Thermal Plasma Cleaning of Surfactant Encapsulated Nanoparticles Open
Surfactants are widely used in the synthesis of nanoparticles, as they have a remarkable ability to direct their growth to obtain well-defined shapes and sizes. However, their post-synthesis removal is a challenge, and the methods used oft…
View article: In Situ Monitoring of Non-thermal Plasma Cleaning of Surfactant Encapsulated Nanoparticles
In Situ Monitoring of Non-thermal Plasma Cleaning of Surfactant Encapsulated Nanoparticles Open
Surfactants are widely used in the synthesis of nanoparticles, as they have a remarkable ability to direct their growth to obtain well-defined shapes and sizes. However, their post-synthesis removal is a challenge, and the methods used oft…
View article: Atomistic mechanisms of water vapor–induced surface passivation
Atomistic mechanisms of water vapor–induced surface passivation Open
The microscopic mechanisms underpinning the spontaneous surface passivation of metals from ubiquitous water have remained largely elusive. Here, using in situ environmental electron microscopy to atomically monitor the reaction dynamics be…
View article: Nature of active sites at Pt/CeO2 interfaces for the water-gas-shift reaction
Nature of active sites at Pt/CeO2 interfaces for the water-gas-shift reaction Open
Understanding the atomistic structure of the active site during catalytic reactions is of paramount importance in both fundamental studies and practical applications, but such studies are challenging due to the complexity of heterogeneous …
View article: Adapting an Electron Microscopy Microheater for Correlated and Time-Resolved Ambient Pressure X-ray Photoelectron Spectroscopy
Adapting an Electron Microscopy Microheater for Correlated and Time-Resolved Ambient Pressure X-ray Photoelectron Spectroscopy Open
Environmental transmission electron microscopy (ETEM) can follow structural and chemical changes in nanomaterials under reaction conditions, including at temperatures up to 1300 °C and pressures up to ~20 mbar. However, ETEM studies are li…
View article: Structure–Property Relationships for Nickel Aluminate Catalysts in Polyethylene Hydrogenolysis with Low Methane Selectivity
Structure–Property Relationships for Nickel Aluminate Catalysts in Polyethylene Hydrogenolysis with Low Methane Selectivity Open
Earth-abundant metals have recently been demonstrated as cheap catalyst alternatives to scarce noble metals for polyethylene hydrogenolysis. However, high methane selectivities hinder industrial feasibility. Herein, we demonstrate that low…
View article: Atomistic Origins of Reversible Noncatalytic Gas–Solid Interfacial Reactions
Atomistic Origins of Reversible Noncatalytic Gas–Solid Interfacial Reactions Open
Noncatalytic gas-solid reactions are a large group of heterogeneous reactions that are usually assumed to occur irreversibly because of the strong driving force to favor the forward direction toward the product formation. Using the example…
View article: Drastically different restructuring of airborne and surface-anchored soot aggregates
Drastically different restructuring of airborne and surface-anchored soot aggregates Open
View article: Photonic Crystal Surface Emitting Diode Lasers with λ near 2 µm
Photonic Crystal Surface Emitting Diode Lasers with λ near 2 µm Open
Epitaxially regrown electrically pumped photonic crystal surface emitting lasers (PCSELs) operating near 2 µm were designed and fabricated within a III-V-Sb material system. A high-index-contrast photonic crystal layer was incorporated int…
View article: Revealing the dynamics of the alloying and segregation of Pt-Co nanoparticles via in-situ environmental transmission electron microscopy
Revealing the dynamics of the alloying and segregation of Pt-Co nanoparticles via in-situ environmental transmission electron microscopy Open
Thermal treatment is a general and efficient way to synthesize intermetallic catalysts and may involve complicated physical processes. So far, the mechanisms leading to the size and composition heterogeneity, as well as the phase segregati…
View article: Dislocation-induced stop-and-go kinetics of interfacial transformations
Dislocation-induced stop-and-go kinetics of interfacial transformations Open
View article: Composition-dependent ordering transformations in Pt–Fe nanoalloys
Composition-dependent ordering transformations in Pt–Fe nanoalloys Open
Significance Dynamically understanding the microscopic processes governing ordering transformations has rarely been attained. The situation becomes even more challenging for nanoscale alloys, where the significantly increased surface-area-…
View article: Passive Oxide Film Growth Observed On the Atomic Scale
Passive Oxide Film Growth Observed On the Atomic Scale Open
Despite the ubiquitous presence of passivation on most metal surfaces, the microscopic‐level picture of how surface passivation occurs has been hitherto unclear. Using the canonical example of the surface passivation of aluminum, here in s…
View article: Automated processing of environmental transmission electron microscopy images for quantification of thin film dewetting and carbon nanotube nucleation dynamics
Automated processing of environmental transmission electron microscopy images for quantification of thin film dewetting and carbon nanotube nucleation dynamics Open
View article: Data association algorithm for large-scale multi-object tracking with complex interactions
Data association algorithm for large-scale multi-object tracking with complex interactions Open
We present an online multi-object tracking algorithm to track multiple objects across a large number of image frames. Our work is motivated by the need to study evolution of nanoscale objects by transmission electron microscopy. The propos…
View article: Electrically Pumped Epitaxially Regrown GaSb‐Based Type‐I Quantum‐Well Surface‐Emitting Lasers with Buried High‐Index‐Contrast Photonic Crystal Layer
Electrically Pumped Epitaxially Regrown GaSb‐Based Type‐I Quantum‐Well Surface‐Emitting Lasers with Buried High‐Index‐Contrast Photonic Crystal Layer Open
Epitaxially regrown electrically pumped photonic crystal surface‐emitting lasers (PCSELs) emitting near 2 and 2.6 μm are designed, fabricated, and characterized. A high‐index‐contrast photonic crystal layer is incorporated into the GaSb‐ba…
View article: Hydrogen-Adsorption Induced Surface Segregation and Chemical Ordering in Cu-Pt Alloys
Hydrogen-Adsorption Induced Surface Segregation and Chemical Ordering in Cu-Pt Alloys Open
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View article: In-situ Atomic-Scale Visualization of Atomic-Step Induced NiO growth during the Oxidation of Ni
In-situ Atomic-Scale Visualization of Atomic-Step Induced NiO growth during the Oxidation of Ni Open
An abstract is not available for this content so a preview has been provided. As you have access to this content, a full PDF is available via the 'Save PDF' action button.