We highlight the recent progress of BCP PC films and microparticles having tunable structural colour in response to external stimuli.

Variations in the underwater sound speed significantly influence propagation ocean, thereby impacting both navigation systems and a substantial portion of marine organisms reliant on sound. This study utilizes cruise data from Beibu Gulf during summer winter 2023–2024 to explore seasonal variations temperature salinity affecting distribution characteristics propagation. Results indicate significant differences either side 30-m isobath Gulf, with pronounced changes corresponding variations....

The multiple hydrogen-bond has been introduced as a reversible driving force for directing the assembly of polymer-grafted nanoparticles (PGNPs). complementary hydrogen-bonds among polymer ligands lead to spontaneous aggregation PGNPs. However, it may also induce uncontrollable PGNPs into assemblies with non-uniform size, even irregular precipitates, due immoderate agglomeration associated strong interactions hydrogen-bonds. This severely limits stable dispersion PGNP aggregates in solvent...

Responsive nanoparticle surfactants (NPSs) can dynamically and reversibly modulate the interfacial interactions between incompatible components, which are essential in catalysis, corrosion, self-assembly of block copolymers (BCPs). However, NPSs with stimuli-responsive behavior often involve tedious chemical synthesis surface modifications. Herein, we propose a strategy to situ construct kind dynamic reversible by electrostatic interaction negatively charged nanoparticles (NPs) positively...

Toxic organic dyes present in wastewater should be removed before discharge. In this study, TEMPO-oxidized, regenerated cellulose beads were prepared using a simple falling ball technique for cationic methylene blue (MB) removal. The obtained characterized various analytical techniques. results indicated that TEMPO-oxidized displayed porous structures with high content of carboxylic acid groups. Thus, the negatively charged can effectively adsorb MB an adsorption capacity 495 mg/g at...

Grafting polymer ligands on gold nanoparticles (AuNPs) by gold–sulfur (Au–S) bond is a facile way commonly employed to fabricate gold–polymer hybrid NPs (AuNP@polymer). By using the reversible addition–fragmentation chain transfer (RAFT) radical polymerization, it convenient present sulfur-containing end groups ligands, such as dithioester and trithioester groups, which can be usually transferred thiol/thiolactone/disulfide aminolysis reaction. However, these show different bonding effects...

Bitcoin, as a virtual cryptocurrency with both property of investment and currency, is widely investigated for its potential safe haven in world volatility. This paper, using classic time series model VAR ARMA-GARCH, aims to study whether Bitcoin has safe-haven value geopolitical events, which based on the Russia-Ukraine conflict. By quantifying impact conflict crude oil prices considered logarithmic yield, this finds out positive negative effects yield from temporary shocks long-term...

Shape-transforming block copolymer (BCP) microparticles have attracted extensive attention due to their promising applications in nanotechnology, biomedicines, interfacial science, and other fields. As performance is highly associated shape structure, it very important realize the precise control of particle shape. In this report, a method proposed regulate structure polystyrene-b-polydimethoxysiloxane (PS-b-PDMS) by using positively charged core-crosslinked nanoparticles (CNPs) as...

A hybrid method combining discharge-assisted laser-induced breakdown spectroscopy (D-LIBS) with wavelet transform represents a highly promising detection technology for the quantitative determination of trace elements in liquids.

The effect of Sr 2+ doping concentration in Ba 1− x TiO 3 photoelectrodes on pyro-photo-electric catalysis was discussed. main reason for the performance improvement is that broadens response range semiconductor to visible light.

Abstract It has been an effective method to improve the metal protective performance of UV‐curable waterborne coatings by increasing crosslinking degree. Hence, a series urethane modified acrylic (UV‐WUA) with different vinyl content were prepared. Firstly, functional prepolymer containing carboxyl and hydroxyl groups was synthesized free radical copolymerization (FRCP) using acid (AA), 2‐hydroxyethyl acrylate (HEA), methyl methacrylate (MMA) butyl (BA). Next, it grafted amounts semi‐adduct...

Abstract Particulate matter (PM) has a significant impact on air quality, especially the PM produced by automobile exhaust and high temperature environment. Therefore, it is of great significance to develop technology that can effectively intercept fine under conditions. This study reports construction poly(m‐phenylene isophthalamide) (PMIA) nanofiber‐reinforced polyimide aerogel (PPNFAs) filters using freeze‐drying electrospinning for filtration. After 100 compression cycles, maximum...

The characterization of laser-induced breakdown spectroscopy (LIBS) near the gas-liquid two-phase interface was investigated with laser acting on sample along horizontal direction. Simulation beam focusing process and observation spot images show that difference in positions air solution results from refraction entering change propagation direction container lateral. peak power mean irradiance focused increase distance away interface, which is attributed to fact loss energy due reflection...

A self-consistent two-dimensional fluid model is employed to investigate the coaxial–coplanar dielectric-barrier discharge (DBD) excited by sinusoidal voltage in atmospheric helium. Simulation results show that there are two current pulses positive half cycle, but only one negative cycle. The transformed from Townsend-like mode, through glow-like and back mode both cycles, during which electric field line exhibits an arc-shape profile due configuration of electrodes. In cathode fall located...

Polymer/gold nanoparticle (AuNP) composites have been utilized as floating gates to enhance the performance of memory devices. However, these devices typically exhibit a low ON/OFF drain current ratio (ION/IOFF) and unstable charge trapping, attributed poorly defined arrangement AuNPs within composite gate. To address limitations, this study employs poly(methyl methacrylate)-grafted (Au@PMMA) building blocks for fabrication monolayered superlattice films with highly ordered structure via...

Purpose The purpose of this study is to guarantee assembly quality and reduce the number manufacturing cycles required for an reflector large antenna. An optimal approach combining a finite element method (FEM) with genetic algorithm (GA) developed simulate optimize before stage. Design/methodology/approach chromosomes GA are encoded consideration factors that affect reflector. fitness function consists accuracy obtained from simulation, evaluation time consumption labor cost. will terminate...