Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: unknown, P. 158743 - 158743
Published: Dec. 1, 2024
Language: Английский
Nature Communications, Journal Year: 2025, Volume and Issue: 16(1)
Published: Jan. 29, 2025
Colloidal nanocrystals inherently undergo structural changes during chemical reactions. The robust structure-property relationships, originating from their nanoscale dimensions, underscore the significance of comprehending dynamic behavior in reactive media. Moreover, complexity and heterogeneity inherent atomic structures require tracking transitions individual at three-dimensional (3D) resolution. In this study, we introduce method time-resolved Brownian tomography to investigate temporal evolution 3D solution. methodology is applied examine atomic-level transformations Pt oxidative etching. maps reveal dissolving nanocrystals, transitioning a crystalline disordered structure. Our study demonstrates emergence phase nanometer length scale that has received less attention bulk thermodynamics.
Language: Английский
Citations
0
Advances in Physics X, Journal Year: 2025, Volume and Issue: 10(1)
Published: March 24, 2025
In line with the paradigm of nanoscience, developing functional nanoalloys for catalytic applications requires a thorough understanding correlations between their synthesis, structure, properties, and performance. Over last two decades, progresses in situ operando transmission electron microscopy (TEM) has revolutionized way to meet this challenge by providing unparalleled observations nanomaterial dynamics formation application media. The atomic scale resolution chemical sensitivity TEM analyses liquid or gaseous media controlled composition temperature are shedding new light on nanoalloys' nucleation growth mechanisms, simultaneous kinetic thermodynamic effects that dictate structural evolution transformations under conditions. Through review, we show opportunities challenges situ/operando rationalizing synthesis
Language: Английский
Citations
0
The Journal of Physical Chemistry C, Journal Year: 2025, Volume and Issue: unknown
Published: April 15, 2025
Language: Английский
Citations
0
Small Methods, Journal Year: 2024, Volume and Issue: unknown
Published: April 30, 2024
Abstract High energy density electrochemical systems such as metal batteries suffer from uncontrollable dendrite growth on cycling, which can severely compromise battery safety and longevity. This originates the thermodynamic preference of nucleation electrode surfaces, where obtaining crucial information deposits in terms crystal orientation, plated volume, rate is very challenging. In situ liquid phase transmission electron microscopy (LPTEM) a promising technique to visualize understand electrodeposition processes, however detailed quantification presents significant difficulties. Here by performing Zn electroplating analyzing data via basic image processing, this work not only sheds new light mechanism but also demonstrates workflow showcasing how dendritic deposition be visualized with volumetric information. These results along additionally corroborated 4D STEM analysis take steps access crystallographic orientation grown nucleates toward live processes.
Language: Английский
Citations
3
Nano Letters, Journal Year: 2025, Volume and Issue: unknown
Published: March 25, 2025
The uptake and release of hydrogen are key parameters for storage materials. Lattice strain offers a powerful way to tune hydride formation in metal nanoparticles. However, the role on is difficult assess single nanoparticle level due lack situ characterization tools quantify presence gas. Here, we achieve dynamic, study reversible individual palladium nanocubes by applying 4D scanning transmission electron microscopy (4D-STEM) 1 bar H2 quantitatively lattice with subnanometer resolution. Upon at 125 °C, Pd expands ∼3.1% relaxes back upon desorption 200 °C. Our 4D-STEM approach relevant wide range systems applications, including catalyst- gas-sensing
Language: Английский
Citations
0
Advanced Science, Journal Year: 2025, Volume and Issue: unknown
Published: March 24, 2025
Abstract Copper (Cu)‐based nanomaterials are one of the most efficient heterogeneous electrocatalysts for CO 2 reduction reaction. However, their selectivity and stability strongly determined by morphology, crystal structure, composition, grain size, boundary density, etc. Hence, gaining quantitative insights into dynamic evolution under synthesis and/or working conditions is critical developing optimal Cu‐based unveiling structure‐property relationship. In this work, possibility addressing these issues demonstrated integrating in situ liquid phase transmission electron microscopy (LP‐TEM) with 4D scanning (4D‐STEM). Here, morphology Cu nanoparticles during electrodeposition electrooxidation processes revealed liquid. Virtual imaging selected area diffraction provide novel defective nanocrystalline electrodeposition. It shown that virtual off‐axis dark field can be used to map distribution O within partially oxidized nanoparticles, opening new opportunities quantitatively probing operando conditions.
Language: Английский
Citations
0
Analytical and Bioanalytical Chemistry, Journal Year: 2025, Volume and Issue: unknown
Published: May 3, 2025
Abstract The controlled self-assembly of Janus particles via pH modulation offers an effective strategy for optimizing surface-enhanced Raman scattering (SERS) and signal amplification. These asymmetric microparticles enable precise spatial organization, influencing plasmonic coupling electromagnetic field distribution critical SERS enhancement. Here, we investigate the pH-mediated its impact on their optical sensing performance. By adjusting solution pH, modulate electrostatic interactions that govern particle aggregation structural formation, leading to tunable hotspots Scanning electron microscopy (SEM) characterizes resulting nanostructures, while imaging measurements assess enhancement capabilities across different conditions. Our findings demonstrate plays a pivotal role in interparticle spacing interactions, yielding significantly amplified signals. This approach provides versatile reproducible method engineering SERS-active substrates, advancing application bioanalytical sensing, molecular diagnostics, environmental monitoring. Graphical abstract
Language: Английский
Citations
0
Matter, Journal Year: 2024, Volume and Issue: unknown, P. 101909 - 101909
Published: Nov. 1, 2024
Language: Английский
Citations
2
Ceramist, Journal Year: 2024, Volume and Issue: 27(2), P. 243 - 254
Published: June 30, 2024
4D-STEM (four dimensional scanning transmission electron microscopy) is a powerful technique for analysis from which structural, physical, chemical information can be extracted. When it comes to experiment, converged beam scanned across the 2D area of sample, and pixelated detector records diffraction pattern at each scan position. Thus, final datasets have four dimensions. This paper will cover material that obtained through 4D STEM summarize current status use studies including virtual imaging, phase retrieval (ptychography) structural amorphous materials. The future perspective new findings also discussed.
Language: Английский
Citations
0
Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: unknown, P. 158743 - 158743
Published: Dec. 1, 2024
Language: Английский
Citations
0