Localization and tracking of colloidal particles in microscopy images generates the raw data necessary to understand both dynamics mechanical properties model systems. Yet, despite obvious importance analyzing particle movement three dimensions (3D), accurate sub-pixel localization 3D has received little attention so far. Tracking been limited by choice whether track all a low-density system, or neglect most mobile fraction dense system. Moreover, assertions are frequently made on accuracies...

Imaging large-scale structure of a thermoreversible colloidal fluid undergoing spinodal decomposition is used to understand and control the coarsening arrest gels.

A hydrothermal method was developed to convert rhombic p–p MoS₂@ZIF-8 into a rodlike p–n MoS₂@ZnO heterostructure with large surface area for sensitive detection of NO₂ at room temperature.

We elucidate mechanisms for colloidal gelation of attractive nanoemulsions depending on the volume fraction (ϕ) colloid. Combining detailed neutron scattering, cryo-transmission electron microscopy and rheological measurements, we demonstrate that proceeds by either two distinct pathways. For ϕ sufficiently lower than 0.23, gels exhibit homogeneous fractal microstructure, with a broad gel transition resulting from formation subsequent percolation droplet–droplet clusters. In these cases,...

We study experimentally the effect of added salt in phoretic motion chemically driven colloidal particles. show that response passive colloids to a fixed active colloid, be it attractive or repulsive, depends on ionic strength, ζ potential, and size colloids. further report direction self-propulsion Janus can reversed by decreasing their potential below critical value. By constructing an effective model treats colloid ions as whole subjected concentration field generated takes into account...

Both 3-hydroxy-2-butanone and triethylamine are highly toxic harmful to human health, their chronic inhalation can cause respiratory diseases, eye lesions, dermatitis, headache, dizziness, drowsiness, even fatality. Developing sensors for detecting such gases with low power consumption, high response superselectivity, stability is crucial healthcare environmental monitoring. This study presents a typical gas sensor fabricated based on AuPdO modified Cu-doped K2W4O13 nanowires, which...

In recent years, there has been growing interest in the study of chiral active materials, which consist building blocks that show dynamics featuring symmetry breaking, e.g., particles rotate a common direction. These materials exhibit fascinating phenomena such as odd viscosity, di usivity, turbulence fluids, vivid dislocation or elasticity crystals elastic and hyperuniform states. The systematic soft matter systems is relatively new, starting around 2017, but already shown promising...

We observe the microscopic dynamics of a suspension colloids with attractive interaction by confocal fluorescence microscopy to provide deeper understanding relationship between local structure and near gel transition. study distinct self-parts van Hove density-density correlation function applied our experimental data. Separable fast slow populations emerge in self-part, while part shows pronounced signature dynamic heterogeneities close transition, dominated particles. The population...

Abstract Studying the stability of Pickering emulsion is great interest for applications including catalysis, oil recovery, and cosmetics. Conventional methods emphasize overall behavior bulk emulsions neglect influence particle adsorbing dynamics, leading to discrepancies in predicting shelf‐life emulsion–based products. By employing a microfluidic method, adsorption controlled consequently examined. This approach enables us elucidate relationship between dynamics on droplet‐level...

Spatiotemporal coordination of a nanorobot ensemble is critical for their operation in complex environments, such as tissue removal or drug delivery. Current strategies achieving this task, however, rely heavily on sophisticated, external manipulation. We here present an alternative, biomimetic strategy by which oscillating Ag Janus micromotors spontaneously synchronize dynamics chemically coupled oscillators. By quantitatively tracking the kinetics at both individual and cluster level, we...

A hierarchical catalytic engine and morphology optimization lead to highly efficient micromotors that operate at a fuel concentration speed close those of biomolecular motors.

Light-powered fuel-free colloidal motors possess significant potential for practical applications ranging from nanomedicine to environmental remediation. However, current light-powered often require the incorporation of expensive metals or high concentrations toxic chemical fuels, which is a severe limitation their applications. Integrating highly ordered and porous materials with large surface area into promising strategy upsurging self-propelled speed adsorption, will benefit many Here,...

Abstract Active fluids display collective phenomena such as active turbulence or odd viscosity, which refer to spontaneous complex and transverse flow. The simultaneous emergence of these seemingly separate is here reported in experiment for a chiral fluid composed carpet standing spinning colloidal rods, simulations synchronously rotating hard discs hydrodynamic explicit solvent. Experiments reveal that multi-scale eddies emerge, hallmark turbulence, with power-law decay the kinetic-energy...

GaN-based photonic-crystal membrane nanocavities with Q factors up to 800 have been realized at the wavelength of ∼480nm. The tuning behavior agrees well numerical calculations using finite-difference time-domain method. Theoretically, lowest energy mode a cavity that consists seven missing holes in Γ-K direction promises factor as high 4×104 volume about 1.3×(λ∕n)3.

We present a new scheme for imparting thermoreversible viscoelasticity to oil-in-water nanoemulsions based on polymer–surfactant self-assembly in solution. Specifically, bridging of polymer-induced micelles the aqueous phase give rise transient network interdroplet bridges without compromising colloidal stability. Characterization structure, dynamics, and rheological properties over broad range material chemistries compositions suggests rules controlling resulting viscoelasticity....

Classic binary materials, ranging from polymer blends to table salts, contain equilibrium phases or crystals of two interacting components. Here, we report on the construction colloidal materials out by employing active particles and passive that dynamically interact organize. Key our scheme is introduction photoactive microspheres whose activity can be precisely tuned. This allows us leverage complex nonequilibrium interplay between constituent components for dynamic coassembly. A wide...

Brome Mosaic Virus (BMV) utilizes a tRNA-like structure (TLS) within its 3' untranslated region to mimic host tRNA functions, aiding aminoacylation and viral replication. This study explores the structural dynamics of BMV TLS interacting with tyrosyl-tRNA synthetase (TyrRS) during aminoacylation. Using cryo-EM, we capture multiple states TLS-TyrRS complex, including unbound TLS, pre-1a, post-1a, catalysis states, resolutions 4.6 Å, 3.5 3.7 3.85 respectively. These comparisons indicate...

We study the heterogeneous dynamics of attractive colloidal particles close to gel transition using confocal microscopy experiments combined with a theoretical statistical analysis. focus on single particle and show that self-part van Hove distribution function is not Gaussian expected for Fickian process, but it reflects instead existence, at any given time, colloids widely different mobilities. Our measurements can be described well by simple analytical model based conventional continuous...

This article reviews the bioinspired design and characterization techniques of different types micro/nanomotors their biomedical applications in cancer diagnosis treatment.

Photoactive colloidal motors whose motion can be controlled and even programed via external magnetic fields have significant potential in practical applications extending from biomedical to environmental remediation. Herein, we report a "three one" strategy Co/Zn-TPM (3-trimethoxysilyl propyl methacrylate) bimetallic Janus micromotor (BMT-micromotor) which by an optical field, chemical fuel, field. The speed of the micromotors tuned light intensity with concentration fuel H2O2, while it...

The absorption of gas molecules at hydrophobic surfaces may have a special state and play an important role in many processes interfacial physics, which has been rarely considered previous theory. In this paper, force spectroscopic experiments were performed by nanosized AFM probe penetrated into individual surface nanobubbles contacted with highly ordered pyrolytic graphite (HOPG) substrate. results showed that the adhesion gas/solid interface was much smaller than air measured same probe....

Silver–silica Janus rods synthesized <italic>via</italic> a pickering emulsion display pronounced self-propelled motion even at ultralow fuel concentrations.