A large quantity of nanosized ZnO tubular structures was prepared using a very simple thermal evaporation mixed Zn–ZnO powders under wet oxidation condition. The nanotubes have hollow core with crystalline wall 8–20 nm in thickness. Optical properties were studied at room temperature. Raman peaks arising from the analyzed, which correspond well to that bulk sample. photoluminescence measurements revealed an intensive UV peak 377 corresponding free exciton emission, and broad about 500...

A high conductive 2D COF polyporphyrin (TThPP) linked by 4-thiophenephenyl groups was synthesized through an in situ chemical oxidative polymerization on the surface of copper foil. The TThPP films were used as anode lithium-ion battery, which exhibited specific capacities, excellent rate performances, and long cycle lives due to alignment nanosheets, they (i) can highly efficiently adsorb Li atoms, (ii) have short-ended paths for fast lithium ion diffusion, (iii) open nanopores holding...

A series of dimethoxybenzene-based catholyte molecules, which are electrochemically reversible at high potential (4.0 V vs Li/Li+) and in the form liquid, is developed. The liquid nature offers molecules possibility being a solo or co-solvent for nonaqueous redox flow batteries. This could dramatically improve energy density. As service to our authors readers, this journal provides supporting information supplied by authors. Such materials peer reviewed may be re-organized online delivery,...

Development of simple, cost-effective, and sensitive fluorescence-based sensors for explosives implies broad applications in homeland security, military operations, environmental industrial safety control. However, the reported fluorescence sensory materials (e.g., polymers) usually respond to a class analytes nitroaromatics), rather than single specific target. Hence, selective detection trace amounts trinitrotoluene (TNT) still remains big challenge sensors. Here we report TNT vapor using...

We have used a scalable and inexpensive method to prepare catalyst comprising graphdiyne nanosheet-supported cobalt nanoparticles wrapped by N-doped carbon (CoNC/GD); this unprecedentedly durable electrocatalyst mediated the hydrogen evolution reaction (HER) with highly catalytic activity over all values of pH. The durability CoNC/GD structure was evidenced performance being preserved 36 000, 38 9000 cycles under basic, acidic, neutral conditions, respectively-behavior superior that...

A series of electrolyte formulations containing fluorinated cyclic carbonates and linear with LiPF6 has been evaluated as solvents for high-voltage Li-ion batteries. The anodic stability the new electrolytes on fully charged spinel LiNi0.5Mn1.5O4 (LNMO) cathode was examined by electrochemical floating tests. effects fluorine substitution carbonate, ratio vs. concentration oxidation were investigated. Based this study, test proved to be an effective tool identification stable materials.

A high performance Li–S battery with novel fluoroether-based electrolyte was reported. The fluorinated prevents the polysulfide shuttling effect and improves Coulombic efficiency capacity retention of battery. Reversible redox reaction sulfur electrode in presence fluoroether TTE systematically investigated. Electrochemical tests post-test analysis using HPLC, XPS, SEM/EDS were performed to examine after cycling. results demonstrate that as a cosolvent mitigates dissolution promotes...

Summary A high-temperature suspending agent with temperature resistance up to 200°C has been developed address the challenges of high-temperature, high-density cement slurry (2.0–2.6g/cm3) settling and destabilization during cementing in deep wells (4500–6000 m) ultradeep (>6000 m). This is designed introduce modified nano-silica (nano-SiO2) long hydrophobic side-chain temperature-sensitive monomers. The inclusion nano-SiO2 enhances improves suspension stability solid-phase particles...

Experimental evidence has been found for the existence of small single wall carbon nanotubes with diameters 0.5 and 0.33 nm by high resolution transmission electron microscopy, their mechanical stability was investigated using tight-binding molecular dynamics simulations. It is shown that, while tubes smaller than 0.4 are energetically less favorable a graphene sheet, some them indeed mechanically stable at temperatures as 1100 degrees C. The tube observed likely (4, 0) part compound...

Magnetic nanoparticles that can be transported in subsurface reservoirs at high salinities and temperatures are expected to have a major impact on enhanced oil recovery, carbon dioxide sequestration, electromagnetic imaging. Herein we report rare example of steric stabilization iron oxide (IO) (NPs) grafted with poly(2-acrylamido-2-methylpropanesulfonate-co-acrylic acid) (poly(AMPS-co-AA)) not only display colloidal stability standard American Petroleum Institute (API) brine (8% NaCl + 2%...

The fluorinated electrolyte containing a fluoroether 1,1,2,2-tetrafluoroethyl-2,2,3,3-tetrafluoropropyl ether (TTE) was investigated as new for lithium-sulfur (Li-S) batteries. low solubility of lithium polysulfides (LiPS) in the reduced parasitic reactions with Li anode and mitigated self-discharge by limiting their diffusion from cathode to anode. use co-solvent LiNO3 an additive shows synergetic effect suppressing Li-S battery due formation solid interphase (SEI) on both sulfur cell...

The transport of engineered nanoparticles in porous media is interest numerous applications including electromagnetic imaging subsurface reservoirs, enhanced oil recovery, and CO2 sequestration. A series poly(2-acrylamido-2-methyl-1-propanesulfonic acid-co-acrylic acid) (poly(AMPS-co-AA)) random copolymers were grafted onto iron oxide (IO) (NPs) to provide colloidal stability American Petroleum Institute (API) standard brine (8 wt/wt % NaCl 2 %CaCl2, anhydrous basis). combinatorial approach,...

For foams with ultra low water contents, the capillary pressure is very large and induces rapid drainage that destabilizes aqueous lamellae between gas bubbles. However, we show high-pressure CO2-in-water can be stabilized a viscoelastic phase composed of entangled wormlike micelles, even for extremely high CO2 volume fractions ϕ 0.95 to 0.98; viscosity these ultradry increased by up 3–4-fold, reaching more than 100 cP relative formed conventional phases. The foam morphology consisted fine...

A series of sulfonated random and block copolymers were adsorbed on the surface ~100 nm iron oxide (IO) nanoparticles (NPs) to provide colloidal stability in extremely concentrated brine composed 8% wt NaCl + 2% CaCl2 (API brine; 1.4 M 0.2 CaCl2) at 90 °C. combinatorial materials chemistry approach, which employed Ca(2+)-mediated adsorption anionic acrylic acid-containing polymers preformed citrate-stabilized IO nanoclusters, enabled investigation a large number polymer coatings. Initially...

Non-radiative decay of orange–red TADF emitters are strongly associated with excited-state structural relaxation through promoting vibrational modes, for which external restraint is critical achieving high OLED emitting efficiency.

The sweep efficiency of CO2 enhanced oil recovery can be improved by forming viscous CO2-in-water (C/W) foams that increase the viscosity CO2. goal this study is to identify CO2-soluble ionic surfactants stabilize C/W at elevated temperatures up 120 °C in presence a high salinity brine using aqueous phase stability, static and dynamic adsorption, solubility, interfacial tension, foam bubble size, measurements. An anionic sulfonate surfactant an amphoteric acetate were selected achieve good...

On July 13, 2024, at the Trump rally in Pennsylvania, someone attempted to assassinate Republican Presidential Candidate Donald Trump. This attempt sparked a large-scale discussion on social media. We collected posts from X (formerly known as Twitter) one week before and after assassination aimed model short-term effects of such ``shock'' public opinions topics. Specifically, our study addresses three key questions: first, we investigate how sentiment toward shifts over time across regions...

A fluorinated carbonate compound was identified as an electrolyte additive capable of stabilizing the new electrolyte/electrode interphase in a high-voltage spinel LiNi0.5Mn1.5O4/graphite cell. The synthesis and characterization are described, electrochemical performance post-analysis using scanning electron microscopy energy dispersive X-ray spectrometry revealed that this actively participates passivation formation on graphite anode, making it effective for enabling all-fluorinated...