Nanomaterial-based enzyme mimics (nanozymes) are currently a new forefront of chemical research. However, the application nanozymes is limited by their low catalytic activity and turnover numbers. Cerium dioxide nanoparticles (nanoceria) among few with oxidase activity. Herein, we report an interesting finding addressing limitations. The nanoceria improved over 100-fold fluoride capping, making it more close to real oxidases. number reached 700 in 15 min, drastically from ∼15 turnovers for...

The first arrival of sedimentary material from Asia onto the Indian continental margin provides a minimum constraint on timing initial India-Asia collision. A combination petrology, detrital Cr-spinel geochemistry, and zircon U-Pb dating Upper Cretaceous to Eocene deep-water succession at Sangdanlin section, southern Tibet, evidence for major provenance change within strata. Cretaceous–Paleocene Denggang Formation quartzarenites contain zircons with dominant Proterozoic-Ordovician ages, an...

Rationale:Recently, there is one-fifth of human deaths caused by cancer, leading to cancer treatment remains a hard nut crack in the medical field.Therefore, as an emerging diagnostic technology, mesoporous nanomaterials-based drug delivery systems integrated diagnosis and therapy have aroused tremendous interest owing visually targeting effect superior efficacy compared with traditional treatment.Methods: In this work, we successfully synthesized carbon-gold hybrid nanozyme nanoprobes,...

Over the past few years, nanomaterial-based surface-enhanced Raman scattering (SERS) detection has emerged as a new exciting field in which theoretical and experimental studies of structure function nanomaterials have become focus.

Abstract Oxidase‐mimicking nanozymes are more desirable than peroxidase‐mimicking ones since H 2 O can be omitted. However, only a few nanomaterials known for oxidase‐like activities. In this work, we compared the activity of Mn 3 , 4 and MnO found that had highest oxidase activity. Interestingly, was even inhibited by . The not much affected presence proteins such as bovine serum albumin (BSA), but physisorption antibodies to strong enough withstand displacement BSA. We then treated with...

Optical absorption and photocatalytic activity can be enhanced by surface plasmon resonance (SPR) effect, but the charge transfer (CT) mechanism between dispersed noble metal nanoparticles (NPs) semiconductor matrix has been ignored. Herein, we adduce a direct strong evidence in Ag-nanoparticle-dispersed BaTiO3 (Ag/BTO) composite films through X-ray photoelectron photoluminescence spectra which reveals CT from BTO trapped Ag NPs under UV light to visible light. Owing broadened optical...

Dislocations have increasingly become important for improving the thermoelectric properties of materials due to their more pronounced scattering effect on phonons than carriers. This study combined introduction dislocation cores through domain engineering with generation Mg vacancies (VMg) by controlling point defects achieve low lattice thermal conductivity and high power factor in n-type p-type Mg2Sn single crystals (SCs). The VMg ordered atomic arrangements allowed carrier transport...

As a new type of 2D nanomaterial, MXene (transition metal carbide/nitride) nanosheets are already widely used in catalysis, sensing, and energy research. DNA is popular sensing molecule. Compared to other materials such as graphene oxide, MoS2, WS2, few fundamental studies were carried out on adsorption by MXene. Due its exfoliation delamination process, the surface abundant -F, -OH, -O- groups, rendering negatively charged repelling DNA. In previous studies, modification was performed...

Intrinsic Bi2Te3 is a representative thermoelectric (TE) material with high performance at low temperature, which enables applications for electronic cooling. However, antisite defects easily form in p-type Bi2Te3, resulting the difficulty of further property enhancement. In this work, formation energy native point supercells and structure primitive unit cell were calculated using first-principles. The defect Bi_Te1 has lower (0.68 eV) under Te-lack condition Bi2Te3. effects on TE properties...

Protein adsorption inhibits the oxidase-like activity of CeO₂ nanoparticles. Coating a partial shell silica on and subsequent conjugation antibodies allow highly sensitive selective detection fenitrothion.

The peroxidase-like activity of gold nanoparticles is significantly enhanced by coating a partial shell iron phosphate, while full inhibits the activity. This reaction has high selectivity and sensitivity for Fe²⁺.

Clean SERS substrates could be prepared without using polymer stabilizers and highly toxic reducing agents, they play a pivotal role in trace amount detection.

Mg2Sn is a potential thermoelectric (TE) material that exhibits environmental compatibility. In this study, we fabricated Sb-doped (Mg2Sn1–xSbx) single-crystal ingots and demonstrated the enhancement of TE performance via point defect engineering Sb doping. The Mg2Sn1–xSbx exhibited considerably enhanced electrical conductivity because donor-doping effect in addition to high carrier mobility. Moreover, contained Mg vacancy (VMg) as defect. introduced VMg doped atoms formed nanostructures,...

The development of thermoelectric (TE) materials, which can directly convert waste heat into electricity, is vital to reduce the use fossil fuels. Mg2Sn and Mg2Si are promising TE materials because their superior performance. In this study, for future improvement performance, point defect engineering was applied single crystals (SCs) via boron (B) doping. Their crystal structures were analyzed white neutron holography SC X-ray diffraction. Moreover, nanostructures properties B-doped SCs...

Montmorillonite (MMT) is a two-dimensional (2D) clay material. Its abundance on the early earth has attracted studies for its role in prebiotic reactions, and adsorption of DNA to MMT potentially important understanding origin life. Although several possible models have been established, consensus mechanism yet be formed, thereby fundamental study performed here. Adding up 300 mM NaCl failed promote MMT, Al2O3, or SiO2 nanoparticles. For polyvalent metals, was achieved following order Ce3+ >...

A hallmark of nanoscience is size-dependent and distance-dependent physical properties. Although most previous studies focused on optical properties, which are often tuned at nanometer scale, we herein report the interaction between halide-capped gold nanoparticles (AuNPs) phosphocholine (PC) liposomes sub-Angstrom level. Halide-capped AuNPs adsorbed by PC attributable to van der Waals force. Iodide-capped interact much more weakly with compared bromide- chloride-capped AuNPs, as indicated a...

A large electronic density of states (DOS) coupled with homogeneous charge distribution can effectively improve the electrical conductivity σ and thus, thermoelectric figure merit ZT .

Abstract Early Cretaceous glauconite from the Xiala section, southwestern Tibet, China, was investigated by petrographic microscopy and scanning electron (SEM), X-ray diffractometry (XRD), Fourier transform infrared (FTIR) spectroscopy, probe microanalysis (EPMA). The investigations revealed that in both sandstones limestone is highly evolved. sandstone autochthonous, but it may be derived underlying glauconitic sandstone. Based on analyses of depositional environments comparisons...

Nanoceria (CeO2 nanoparticle) with oxidase-like catalytic activity has been used for a diverse range of analytical, environmental, and nanomedicine applications. In this work, the use nanoceria oxidation common chromogenic substrates was investigated at low pH, where its greatly enhanced. addition, shape nanoparticles changed dramatically, yielding nanorods in presence adsorbed pH 1. This work provides an interesting method to synthesize CeO2 room temperature. By slightly increasing reaction...

Multi-scale defects in Li-doped Mg 2 Sn single crystals effectively reduce thermal conductivity. The highest dimensionless figure-of-merit zT among p-type is achieved ( ∼ 0.38 at 700 K).