Haimei Zheng
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View article: Strain release through hydrogen bond–mediated layer twisting
Strain release through hydrogen bond–mediated layer twisting Open
Strain engineering, enabling the precise control over structure and functional properties, is a key strategy for the design of advanced materials. However, the mechanisms governing strain evolution and release at the nanoscale remain large…
View article: Solvent Determines the Formation Pathway in Sol–Gel Synthesized Disordered Rock Salt Material for Lithium Ion Battery Application
Solvent Determines the Formation Pathway in Sol–Gel Synthesized Disordered Rock Salt Material for Lithium Ion Battery Application Open
The increasing demand for lithium-ion batteries with high capacity and cycling stability, in combination with the scarcity of cobalt and nickel, has led to significant efforts to develop new cathode materials based on earth-abundant transi…
View article: Investigating mutual coupling in the hydrogen epoch of reionization array and mitigating its effects on the 21-cm power spectrum
Investigating mutual coupling in the hydrogen epoch of reionization array and mitigating its effects on the 21-cm power spectrum Open
Interferometric experiments designed to detect the highly redshifted 21-cm signal from neutral hydrogen are producing increasingly stringent constraints on the 21-cm power spectrum, but some k-modes remain systematics-dominated. Mutual cou…
View article: Spatially Enhanced Electrostatic Doping in Graphene Realized via Heterointerfacial Precipitated Metals (Small 23/2025)
Spatially Enhanced Electrostatic Doping in Graphene Realized via Heterointerfacial Precipitated Metals (Small 23/2025) Open
View article: Study on the synergistic phenomenon of oil–water–solid interface in high mineralization co-produced water system based on chelating agent mixed surfactant
Study on the synergistic phenomenon of oil–water–solid interface in high mineralization co-produced water system based on chelating agent mixed surfactant Open
This study investigates the synergistic effects of chelating agents and surfactants in high-salinity co-produced water coproduced water. The scale inhibition efficiency, wettability alterations, and interfacial modification capabilities of…
View article: Spatially Enhanced Electrostatic Doping in Graphene Realized via Heterointerfacial Precipitated Metals
Spatially Enhanced Electrostatic Doping in Graphene Realized via Heterointerfacial Precipitated Metals Open
Forming heavily‐doped regions in 2D materials, like graphene, is a steppingstone to the design of emergent devices and heterostructures. Here, a selective‐area approach is presented to tune the work‐function and carrier density in monolaye…
View article: <i>In Situ</i> TEM Characterization of Battery Materials
<i>In Situ</i> TEM Characterization of Battery Materials Open
Transmission electron microscopy (TEM) is an indispensable analytical technique in materials research as it probes material information down to the atomic level and can be utilized to examine dynamic phenomena during material transformatio…
View article: Facet‐Dependent Cold Welding of Au Nanorods Revealed by Liquid Cell Transmission Electron Microscopy
Facet‐Dependent Cold Welding of Au Nanorods Revealed by Liquid Cell Transmission Electron Microscopy Open
Cold welding of metals at the nanoscale has been demonstrated to play a significant role in bottom‐up manufacturing and self‐healing processes of nanostructures and nanodevices. However, the welding mechanism at the nanoscale is not well u…
View article: In-situ/operando study of Cu-based nanocatalysts for CO2 electroreduction using electrochemical liquid cell TEM
In-situ/operando study of Cu-based nanocatalysts for CO2 electroreduction using electrochemical liquid cell TEM Open
The structure of a nanocatalyst during electrocatalytic reactions often deviates from its pristine structure due to intrinsic properties, or physical and chemical adsorption at the catalytic surfaces. Taking Cu-based catalysts for CO 2 ele…
View article: Author Correction: The role of manganese in CoMnOx catalysts for selective long-chain hydrocarbon production via Fischer-Tropsch synthesis
Author Correction: The role of manganese in CoMnOx catalysts for selective long-chain hydrocarbon production via Fischer-Tropsch synthesis Open
Correction to: Nature Communicationshttps://doi.org/10.1038/s41467-024-54578-3, published online 27 November 2024. The original version of this Article omitted a line in the Acknowledgements section: Work at the Molecular Foundry was suppo…
View article: Structural Transformation and Degradation of Cu Oxide Nanocatalysts during Electrochemical CO <sub>2</sub> Reduction
Structural Transformation and Degradation of Cu Oxide Nanocatalysts during Electrochemical CO <sub>2</sub> Reduction Open
The electrochemical CO2 reduction reaction (CO2RR) holds enormous potential as a carbon-neutral route to the sustainable production of fuels and platform chemicals. The durability for long-term operation is currently …
View article: <tt>matvis</tt>: a matrix-based visibility simulator for fast forward modelling of many-element 21 cm arrays
matvis: a matrix-based visibility simulator for fast forward modelling of many-element 21 cm arrays Open
Detection of the faint 21 cm line emission from the Cosmic Dawn and Epoch of Reionization will require not only exquisite control over instrumental calibration and systematics to achieve the necessary dynamic range of observations but also…
View article: Mitigating Humidity Interference in Chemiresistive Hydrogen Sensors Through Hydrophobic Surface Functionalization
Mitigating Humidity Interference in Chemiresistive Hydrogen Sensors Through Hydrophobic Surface Functionalization Open
View article: A Personal Journey in Nanoscience via Developing and Applying Liquid Phase TEM
A Personal Journey in Nanoscience via Developing and Applying Liquid Phase TEM Open
Liquid phase TEM has attracted widespread attention in recent years as a groundbreaking tool to address various fundamental problems in nanoscience. It has provided the opportunity to reveal many unseen dynamic phenomena of nanoscale mater…
View article: The role of manganese in CoMnOx catalysts for selective long-chain hydrocarbon production via Fischer-Tropsch synthesis
The role of manganese in CoMnOx catalysts for selective long-chain hydrocarbon production via Fischer-Tropsch synthesis Open
Cobalt is an efficient catalyst for Fischer−Tropsch synthesis (FTS) of hydrocarbons from syngas (CO + H 2 ) with enhanced selectivity for long-chain hydrocarbons when promoted by Manganese. However, the molecular scale origin of the enhanc…
View article: A demonstration of the effect of fringe-rate filtering in the hydrogen epoch of reionization array delay power spectrum pipeline
A demonstration of the effect of fringe-rate filtering in the hydrogen epoch of reionization array delay power spectrum pipeline Open
Radio interferometers targeting the 21cm brightness temperature fluctuations at high redshift are subject to systematic effects that operate over a range of different time-scales. These can be isolated by designing appropriate Fourier filt…
View article: Direct Heterogeneous Integration of Molybdenum Disulfide via Spin-on Molecular Chemistry
Direct Heterogeneous Integration of Molybdenum Disulfide via Spin-on Molecular Chemistry Open
Two-dimensional (2D) semiconductors, such as molybdenum disulfide (MoS2), are emerging as key materials for next-generation electronics, addressing challenges in the miniaturization of silicon-based technologies. Despite progress in scalin…
View article: Mitigating calibration errors from mutual coupling with time-domain filtering of 21 cm cosmological radio observations
Mitigating calibration errors from mutual coupling with time-domain filtering of 21 cm cosmological radio observations Open
The 21 cm transition from neutral Hydrogen promises to be the best observational probe of the Epoch of Reionization (EoR). This has led to the construction of low-frequency radio interferometric arrays, such as the Hydrogen Epoch of Reioni…
View article: Bayesian estimation of cross-coupling and reflection systematics in 21cm array visibility data
Bayesian estimation of cross-coupling and reflection systematics in 21cm array visibility data Open
Observations with radio arrays that target the 21-cm signal originating from the early Universe suffer from a variety of systematic effects. An important class of these are reflections and spurious couplings between antennas. We apply a Ha…
View article: Effect of adsorption of different types of surfactants on conglomerate reservoir minerals on chemical oil recovery efficiency
Effect of adsorption of different types of surfactants on conglomerate reservoir minerals on chemical oil recovery efficiency Open
Using surfactants to extract oil, the anionic surfactant Karamay petroleum sulfonate (KPS), the zwitterionic surfactant octadecyl betaine (BS-18) and the nonionic surfactant coconut oil fatty acid diethanolamide (6501) were selected for ad…
View article: Mitigating calibration errors from mutual coupling with time-domain filtering of 21 cm cosmological radio observations
Mitigating calibration errors from mutual coupling with time-domain filtering of 21 cm cosmological radio observations Open
The 21 cm transition from neutral Hydrogen promises to be the best observational probe of the Epoch of Reionisation (EoR). This has led to the construction of low-frequency radio interferometric arrays, such as the Hydrogen Epoch of Reioni…
View article: Ion diffusion retarded by diverging chemical susceptibility
Ion diffusion retarded by diverging chemical susceptibility Open
View article: Difficult Measurements of Materials Systems at Cryogenic Temperatures: Cryo-EELS and Cryo-4D-STEM
Difficult Measurements of Materials Systems at Cryogenic Temperatures: Cryo-EELS and Cryo-4D-STEM Open
Scanning/transmission electron microscopy (S/TEM) in materials science has traditionally been accomplished at room temperature due to their solid state in this temperature range and relative insensitivity to radiolysis damage. Cooling to c…
View article: Investigation of Gallium Nitride Based HEMTs with Thermal Dissipation
Investigation of Gallium Nitride Based HEMTs with Thermal Dissipation Open
The heat dissipation optimization process is a crucial element in high power high electron mobility transistor (HEMT) components fabricated using the Gallium Nitride grown on silicon (Si) substrate. In this study, the Si substrate is thinn…
View article: Reversible phase transformations between Pb nanocrystals and a viscous liquid-like phase
Reversible phase transformations between Pb nanocrystals and a viscous liquid-like phase Open
Phase transformations have been a prominent topic of study for both fundamental and applied science. Solid-liquid reaction–induced phase transformations can be hard to characterize, and the transformation mechanisms are often not fully und…
View article: Atomic dynamics of electrified solid–liquid interfaces in liquid-cell TEM
Atomic dynamics of electrified solid–liquid interfaces in liquid-cell TEM Open
View article: Investigating Mutual Coupling in the Hydrogen Epoch of Reionization Array and Mitigating its Effects on the 21-cm Power Spectrum
Investigating Mutual Coupling in the Hydrogen Epoch of Reionization Array and Mitigating its Effects on the 21-cm Power Spectrum Open
Interferometric experiments designed to detect the highly redshifted 21-cm signal from neutral hydrogen are producing increasingly stringent constraints on the 21-cm power spectrum, but some k-modes remain systematics-dominated. Mutual cou…
View article: Engineering liquid-liquid interfaces for high-entropy alloy synthesis
Engineering liquid-liquid interfaces for high-entropy alloy synthesis Open
High-entropy alloys (HEAs) with various promising applications have attracted significant interest. However, alloying immiscible metal elements while controlling the morphology and crystallinity remains extremely challenging. We report a g…
View article: Atomic evolution of hydrogen intercalation wave dynamics in palladium nanocrystals
Atomic evolution of hydrogen intercalation wave dynamics in palladium nanocrystals Open
Solute-intercalation-induced phase separation creates spatial heterogeneities in host materials, a phenomenon ubiquitous in batteries, hydrogen storage, and other energy devices. Despite many efforts, probing intercalation processes at the…
View article: Clinical manifestation, lifestyle, and treatment patterns of chronic erosive gastritis: A multicenter real-world study in China
Clinical manifestation, lifestyle, and treatment patterns of chronic erosive gastritis: A multicenter real-world study in China Open
BACKGROUND Although chronic erosive gastritis (CEG) is common, its clinical characteristics have not been fully elucidated. The lack of consensus regarding its treatment has resulted in varied treatment regimens. AIM To explore the clinica…