Search

Contact-electro-catalysis (CEC) has been recently proposed for the effective degradation of methyl orange, but the reactivity of catalysts in the CEC process needs further investigation.

We summarise for the first time the development and microscopic mechanisms of DC-TENGs based on the tribovoltaic effect, which is of great significance for designing high-performance devices and advancing future energy-harvesting technology.

A new facile strategy to maximize the charge density over 1000 μC m−2 for a high-output TENG is demonstrated by introducing new physics in contact electrification, i.e. ‘Electric-field-driven interfacial trapping of drifting triboelectric charges’.

This paper reviews the features and preparation methods of waste-derived carbonized materials (WDCM), the working mechanism of the WDCM-based triboelectric nanogenerator (TENG), and the application and prospects of WDCM-based TENG in various fields.

The relationship between the sliding speed, concentration of moving droplet and transferred charge at a liquid–solid interface, is probed using a droplet triboelectric nanogenerator.

A TENG intrinsically adaptive to chaotic agitations like the Brownian motors is designed based on dual symmetry breakings.

Maximizing TENGs’ energy cycle by analyzing the dynamic charge transfer process and suppressing air breakdown.

Methylated Septin9 (mSEPT9) has been suggested for CRC detection. To assess the performance of mSEPT9 in Western China, we compared its diagnostic and recurrence monitoring values with fecal occult blood test (FOBT), carcinoembryonic antigen (CEA) and carbohydrate antigen 19-9 (CA 19-9).Overall 300 subjects including 209 CRC patients and 91 healthy subjects, who have performed mSEPT9, FOBT, CEA and CA19-9 tests, were involved. Sensitivity, specificity, and area under the ROC curve (AUC) were used to evaluate the efficacy of each method.Plasma mSEPT9 demonstrated an AUC of 0.860, and a sensitivity of 76.4 % for CRC detection. The sensitivity of mSEPT9 was higher than FOBT, CEA and CA 19-9. Though mSEPT9 presented a larger or equal sensitivity for stage Ⅱ-IV CRCs, FOBT showed a better sensitivity for stage I CRCs. Logistical analysis showed the ones with positive mSEPT9, FOBT and CEA were more likely to have CRC (all P 0.01). Then, the three biomarkers built the nomogram predicting the probability of having CRC. The sensitivity of mSEPT9 was also much higher than CEA for CRC recurrence monitoring.The mSEPT9 test performed better than traditional tests for CRC detection, and should be recommended for FOBT-positive ones or individuals who refuse FOBT.

In rodent models, Li-ESWT has been shown to negatively impact semen concentration after treatment on the penis, implying that the reproductive system in close proximity may be indirectly affected by this modality. We hypothesized that shock waves are detrimental to spermatogenesis, and the aim of this study was to evaluate the effect of shock waves on spermatogenesis after direct shockwave treatment on testes using different energy settings.Twenty-five male Sprague Dawley rats, 8 weeks old, were divided into five groups, including one control group and four treatment groups each treated using shock waves of different intensities. All rats in the treatment groups received 2000 shocks on the left testis twice a week for 4 weeks, with shock wave intensity and frequency varied by treatment group: 0.1 mJ/mm 2 at 4 Hz for Group A, 0.15 mJ/mm 2 at 4 Hz for Group B, 0.35 mJ/mm 2 at 4 Hz for Group C, and 0.55mJ/mm2 at 3 Hz for Group D. At the end of the experiment, sperm collected from the epididymis was evaluated for concentration and motility. Testicular spermatogenesis, the apoptotic index of germ cells, and the expression of a meiotic-specific gene were also analyzed.The treatment group receiving shock wave intensity at 0.55 mJ/mm2 showed a significant decrease in sperm concentration, motility, and Johnsen score as compared to other groups. The apoptotic index of spermatogenic cells increased as intensity of the shock wave treatment was escalated, and reach a statistically significant difference at 4 weeks post-treatment. Treating testes with intensity levels of 0.55 mJ/mm2 at 3 Hz interfere with the quality or quantity of spermatogenesis and also increases in spermatogenic cell apoptosis, whereas the expression of the SYCP3 gene significantly decreased after treatment with intensity levels of 0.10 mJ/mm2, 0.15 mJ/mm2, and 0.35 mJ/mm2 at 4 Hz.Treating testes with intensity levels of 0.55 mJ/mm2 at 3 Hz interfere with the quality or quantity of spermatogenesis and also increases in spermatogenic cell apoptosis, whereas the expression of the SYCP3 gene significantly decreased after treatment with intensity levels of 0.10 mJ/mm2, 0.15 mJ/mm2, and 0.35 mJ/mm2 at 4 Hz.

Water splitting for yielding high-purity hydrogen represents the ultimate choice to reduce carbon dioxide emission owing to the superior energy density and zero-pollution emission after combustion. However, the high electricity consumption and requirement of large quantities of pure water impede its large-scale application. Here, a triboelectric nanogenerator (W-TENG) converting offshore wind energy into electricity is proposed for commercial electric energy saving and cost reduction. By introducing PTFE/POM dielectric pairs with matched HOMO/LUMO band gap energy, a high charge density is achieved to promote the output of W-TENG. With the impedance matching design of transformers with the internal resistance of W-TENG, the output current is further enhanced from 1.42 mA to 54.5 mA with a conversion efficiency of more than 92.0%. Furthermore, benefiting from the high electrocatalytic activity (overpotential = 166 mV and Tafel slope = 181.2 mV dec

The forthcoming wearable health care devices garner considerable attention because of their potential for monitoring, treatment, and protection applications. Herein, a self-powered triboelectric patch was developed using polytetrafluoroethylene rubbed with nylon fabric. The triboelectric patch can maintain a stable electrostatic field, due to the excess electrification on the surface of the triboelectric layer. The designed triboelectric nanogenerator (TENG) output watt density can reach about 485 mW/m