Aug 2026· Journal of the American Chemical Society· Vol 148, pp. 33486 - 33495· 0 citations· 48 references
Medicine
Abstract
Exsolution enables controlled solid-state precipitation of metal nanoparticles from metal oxides, resulting in materials that exhibit excellent catalytic properties for electrochemical energy conversion. The diverse characteristics of particles exsolved at different temperatures indicate complex mechanisms that remain unresolved. Through a series of in situ electron microscopy, synchrotron X-ray diffraction, and thermogravimetry experiments on La0.2Ca0.7Ti0.9Sc0.05Cu0.05O3−δ across nanoscale wedges to μm-sized powders, multiple stages of exsolution are deconvoluted with increasing thermal activation: (1) minor exsolution of anchored surface nanoparticles, (2) exsolution of endoparticles within the bulk, and (3) diffusion and coalescing in the bulk and at the surfaces. Reconstruction of the perovskite surface by formation of nanoscopic steps and terraces proceeds concurrently with endoparticle growth. Moreover, distinct exsolution characteristics are observed in the near-surface region and deeper within the bulk, resulting in spherically and orthorhombically shaped endoparticles, respectively.
Controlling elemental mixing in nanoparticles composed of immiscible elements remains a central challenge in high-entropy materials design. Here, we demonstrate a kinetic pathway that enables a transition from elementally segregated to high-entropy AgNiCoCr nanoparticles using nanosecond laser-induced dewetting of meta...
Soumya Mandal, A. Mahata, Annaliese Colwell et al.· ACS Applied Nano Materials· 0 citations
2D materials are increasingly recognized as promising candidates for next-generation catalysis, energy storage devices, and sustainable chemical transformations. Among 2D materials, boron nanosheets have attracted considerable attention due to their unique electronic structure and high surface reactivity. However, the...
Mahrye, Kai-Xuan Xi, Dan-Yang Ma et al.· Small· 0 citations
The Cu2−xAgxSe potential thermoelectrics series (x = 0.4–1.8) is prepared in a planetary ball mill by high-energy milling of Cu, Ag, and Se powders. After only 7 min of mechanochemical synthesis, the products are analyzed by X-ray diffraction, particle size distribution, specific surface area, X-ray fluorescence analys...
Dáša Drenčaková, M. Achimovičová, J. Navrátil et al.· Nanoscale Advances· 0 citations
Vanadium diboride (VB2), a layered ceramic comprising of vanadium atoms between boron honeycomb planes, has sought a renewed attention on account of its promising properties for energy storage and catalysis. The layered structure of VB2 also presents a possibility to yield two-dimensional counterparts. This aspect, h...
Vruddhi Jani, C. Ghoroi, K. Jasuja· Journal of Physical Chemistr...· 0 citations
The disorder-order transition of metal alloys delivers ordered intermetallic nanoparticles (NPs) as efficient and stable catalysts. However, this transition is practically challenging due to the thermodynamically low driving force and the complex kinetic competition with concurrent processes (e.g., phase separation). H...
Jia-Wei Huang, Zhou-Yang Zhang, Guang-Ren Wang et al.· Journal of the American Chem...· 0 citations
