The shape anisotropy of nanoparticle building blocks is critical importance in determining their packing symmetry and assembly directionality. While there has been extensive research on the effect overall geometric shapes, nanometer morphology details not well-recognized or understood. Here we draw shape-anisotropic gold triangular nanoprism synthesized based a method recently developed; besides "large-scale" prism (79.8 nm side length 22.0 thickness), prisms are beveled with sides convexly...

With the increase in dependence on renewable energy sources, interest storage systems has increased, particularly with solar cells, redox flow batteries, and lithium batteries. Multiple diagnostic techniques have been utilized to characterize various factors relation battery performance. Electrochemical tests were used study density, capacity, cycle life, rate, other related properties. Furthermore, it is critical correlate information collected from characterization of materials its...

Abstract Numerous mechanisms have been studied for chemical reactions to provide quantitative predictions on how atoms spatially arrange into molecules. In nanoscale colloidal systems, however, less is known about the physical rules governing their spatial organization, i.e., self-assembly, functional materials. Here, we monitor real-time self-assembly dynamics at single nanoparticle level, which reveal marked similarities foundational principles of polymerization. Specifically, using...

Physical properties of κ- and ε-Ga2O3 are investigated using density functional theory. We utilized the supercell method considering partial occupancies in ε-Ga2O3. The polarization values these materials were analyzed to overcome inconsistency between experimental theoretical studies. ∼26.39 24.44 µC/cm2, respectively. bandgap 4.62 4.27 eV estimated with hybrid method, which suggested an underestimation PBEsol 2.32 2.06 for ε-Ga2O3,

An understanding of how complex nanoscale morphologies emerge from synthesis would offer powerful strategies to construct soft materials with designed structures and functions. However, these kinds have proven difficult characterize, therefore manipulate, because they are three-dimensional (3D), nanoscopic, often highly irregular. Here, we studied polyamide (PA) membranes used in wastewater reclamation as a prime example this challenge. Using electron tomography quantitative morphometry,...

We use liquid-phase transmission electron microscopy (LP-TEM) to characterize the structure and dynamics of a solution-phase superlattice assembled from gold nanoprisms at single particle level. The lamellar superlattice, determined by balance interprism interactions, is maintained resolved under low-dose imaging conditions typically reserved for biomolecular imaging. In this dose range, we capture dynamic structural changes in real time, where contraction smaller steady-state lattice...

2–3 nm sized Pt3Co nanoparticles (NPs) with Pt-enriched shells on a carbon support were prepared by one-step ultrasound polyol process Pt(acac)2 (acac = acetylacetonate) and Co(acac)2. The facilitates the conversion of Co(acac)2 retards into NPs, which can be explained different vapour pressures metal precursors. shell structure NPs this method, as opposed to alloy-like elemental distribution synthesized in similar conditions but without ultrasound, was evidenced transmission electron...

Abstract NH 3 has been used in wide applications, such as fertilizers, hydrogen sources, and working fluids, where proper adsorbents are required to minimize human health risks daily exposure well achieve energy efficiency conversion systems. As operating pressure differs from each usage, the structure properties of adsorbent need be optimized pressure. Metal–organic frameworks (MOFs) have emerged promising adsorbents, which would customizable for different pressures due great structural...

In various domains spanning materials synthesis, chemical catalysis, life sciences, and energy materials, in situ transmission electron microscopy (TEM) methods exert a profound influence. These methodologies enable the real-time observation manipulation of gas-phase liquid-phase reactions at nanoscale, facilitating exploration pivotal reaction mechanisms. Fundamental research areas like crystal nucleation, growth, etching, self-assembly have greatly benefited from these techniques....

Highly anisometric nanoparticles have distinctive mechanical, electrical, and thermal properties are therefore appealing candidates for use as self-assembly building blocks. Here, we demonstrate that ultra-anisometric nanoplates, which a nanoscale thickness but micrometer-scale edge length, offer many material design capabilities. In particular, show these nanoplates "copolymerize" in predictable way with patchy spheres (Janus triblock particles) into one- two-dimensional structures tunable...

The kinetically controlled supramolecular polymerization is reported of bisterpyridine-based ligands bearing alanine moieties and alkyl chains, both in the absence presence Tb(NO3)3, a DMSO H2O mixture (2:8 v/v). R-L1 R-L2 exhibit helical fiber structures with lengths several hundred micrometers, without Tb3+ ions (3.0 equiv.). polymers form through cooperative model nucleation-elongation mechanism follow an "on-pathway" process. Thermodynamic parameters are calculated using MATLAB heating...

Reconfigurable hybrid nanoparticles made by decorating flexible polymer shells on rigid inorganic nanoparticle cores can provide a unique means to build stimuli-responsive functional materials. The shell reconfiguration has been expected depend the local core shape details, but limited systematic investigations have undertaken. Here, two literature methods are adapted coat either thiol-terminated polystyrene (PS) or polystyrene-poly(acrylic acid) (PS-b-PAA) onto series of anisotropic gold...

An increase in the carrier density of semiconductor nanocrystals can gradually change origin optical property from excitonic transition to localized surface plasmon resonances. Here, we present evolution electronic self-doped Ag2Se colloidal quantum dots, intraband resonances along with a splitting (1Pe-1Se). The minimum fwhm split is only 23.7 meV, which exceptionally narrow compared that metal oxide showing LSPRs, inferring electron-electron scattering significantly suppressed due smaller...

In situ liquid phase transmission electron microscopy (TEM) and three-dimensional tomography are powerful tools for investigating the growth mechanism of MOFs understanding factors that influence their particle morphology. However, combined application to study MOF etching dynamics is limited due challenges technique such as sample preparation, field view, low density, data analysis complexity. this research, we present a employing in TEM investigate colloidal zeolitic imidazolate framework...

Colloids are mainly divided into two types defined by size. Micron-scale colloids widely used as model systems to study phase transitions, while nanoparticles have physicochemical properties unique their Here we a promising yet underexplored third type: anisometric colloids, which integrate micrometer and nanometer dimensions the same particle. We show that our prototypical system of silver plates with high polydispersity assemble, unexpectedly, an ordered, three-dimensional lattice....

Abstract Metal–organic frameworks (MOFs) present diverse building blocks for high‐performance materials across industries, yet their crystallization mechanisms remain incompletely understood due to gaps in nucleation and growth knowledge. In this study, MOF structural evolution is probed using situ liquid phase transmission electron microscopy (TEM) cryo‐TEM, unveiling a blend of classical nonclassical pathways involving liquid–liquid separation, particle attachment–coalescence, surface...

We demonstrate that gold nanoparticles can become catalytically active for the electrochemical hydrogen oxidation reaction by a sonication treatment. Experimental data and theoretical calculations indicate activity arises from supercooled molten state of which are enriched with coordinatively unsaturated atoms.

We report the isolation of a nonporous plate-like intermediate species (MOF-i) obtained during synthesis MOF-5 and testing this intermediate's reactivity toward three metal ions (ZnII, CuII, MnII) in N,N-dimethylformamide at 120 °C. interpenetrated crystals from reaction between MOF-i Zn(NO3)2·6H2O, accompanied by change morphology plate to cube. Reaction with CuCl2·2H2O did not disrupt MOF-i, but it result replacement ZnII CuII formation novel porous copper MOF. showed no MnCl2. Our results...

The lattice strain effect in Pd–Ni core–shell nanocubes on the selectivity of urea electrolysis is elucidated, which can facilitate catalyst design for efficient waste treatment and concomitant cathodic hydrogen production or CO 2 reduction.

Promoting the cooling performance of adsorption chillers (ACs) greatly relies on exploration high-performance adsorbent/refrigerant working pairs. Ammonia is not only an environmentally friendly refrigerant but also favorable for heat and mass transfer in ACs owing to its large vapor pressure enthalpy evaporation. Zeolite imidazolate frameworks (ZIFs) with excellent ammonia stability are identified as a class potential adsorbents practical ammonia-based ACs. However, high-performing...