Dry matter phase accumulation of spring maize in response to different amounts of manure application.

Dry matter phase accumulation of spring maize in response to different amounts of manure application.</p

Grain yields in 2015 and 2016 (kg ha^-1).

Grain yields in 2015 and 2016 (kg ha-1).</p

Statistically significant differences in mineral N concentration and distribution in the soil profile.

Statistically significant differences in mineral N concentration and distribution in the soil profile.</p

Mineral N concentration and distribution in the soil profile.

The vertical bars represent the standard errors of the data.</p

Dynamic changes in N accumulation of the maize and N accumulation variance analysis results during different growth stages.

Dynamic changes in N accumulation of the maize and N accumulation variance analysis results during different growth stages.</p

Hybridized Electromagnetic–Triboelectric Nanogenerator for Scavenging Air-Flow Energy to Sustainably Power Temperature Sensors

We report a hybridized nanogenerator with dimensions of 6.7 cm × 4.5 cm × 2 cm and a weight of 42.3 g that consists of two triboelectric nanogenerators (TENGs) and two electromagnetic generators (EMGs) for scavenging air-flow energy. Under an air-flow speed of about 18 m/s, the hybridized nanogenerator can deliver largest output powers of 3.5 mW for one TENG (in correspondence of power per unit mass/volume: 8.8 mW/g and 14.6 kW/m³) at a loading resistance of 3 MΩ and 1.8 mW for one EMG (in correspondence of power per unit mass/volume: 0.3 mW/g and 0.4 kW/m³) at a loading resistance of 2 kΩ, respectively. The hybridized nanogenerator can be utilized to charge a capacitor of 3300 μF to sustainably power four temperature sensors for realizing self-powered temperature sensor networks. Moreover, a wireless temperature sensor driven by a hybridized nanogenerator charged Li-ion battery can work well to send the temperature data to a receiver/computer at a distance of 1.5 m. This work takes a significant step toward air-flow energy harvesting and its potential applications in self-powered wireless sensor networks

Experimental treatments and fertilizer rates.

Experimental treatments and fertilizer rates.</p

Hybridized Electromagnetic–Triboelectric Nanogenerator for Scavenging Air-Flow Energy to Sustainably Power Temperature Sensors

We report a hybridized nanogenerator with dimensions of 6.7 cm × 4.5 cm × 2 cm and a weight of 42.3 g that consists of two triboelectric nanogenerators (TENGs) and two electromagnetic generators (EMGs) for scavenging air-flow energy. Under an air-flow speed of about 18 m/s, the hybridized nanogenerator can deliver largest output powers of 3.5 mW for one TENG (in correspondence of power per unit mass/volume: 8.8 mW/g and 14.6 kW/m³) at a loading resistance of 3 MΩ and 1.8 mW for one EMG (in correspondence of power per unit mass/volume: 0.3 mW/g and 0.4 kW/m³) at a loading resistance of 2 kΩ, respectively. The hybridized nanogenerator can be utilized to charge a capacitor of 3300 μF to sustainably power four temperature sensors for realizing self-powered temperature sensor networks. Moreover, a wireless temperature sensor driven by a hybridized nanogenerator charged Li-ion battery can work well to send the temperature data to a receiver/computer at a distance of 1.5 m. This work takes a significant step toward air-flow energy harvesting and its potential applications in self-powered wireless sensor networks

Video2_Potassium Titanate Assembled Titanium Dioxide Nanotube Arrays Endow Titanium Implants Excellent Osseointegration Performance and Nerve Formation Potential.MP4

Titanium based materials have been widely applied in bone-tissue engineering. However, inefficient bone repair remains to be solved due to the lack of neural network reconstruction at the bone-implant interface. Herein, we propose a functional surface modification approach to promote neurogenesis. Using an electrochemical technique and a hydrothermal approach, a potassium titanate nanorod-decorated titanium oxide (K2Ti6O13-TiO2) nanotube array is constructed on the surface of titanium implants. The K2Ti6O13-TiO2 hybrid nanotube array on titanium implants can enhance the osteogenic differentiation of mesenchymal stem cells due to the special nanostructures of titanium oxide nanorods. Meanwhile, the release of potassium ions is able to accelerate the neural differentiation of neural stem cells. This study provides a new approach to promote neuralization on the surface of implants, which is promising for future applications in constructing a fully functional interface in bone repair.</p

Origin of the Enhanced Hydrogen Evolution Reaction Activity of Grain Boundaries in MoS₂ Monolayers

As one of the most attractive catalysts for the electrochemical hydrogen evolution reaction (HER), MoS2 has gained great attention. With respect to the MoS2 monolayer, nevertheless, the active sites are confined to edges. To activate the inert basal plane of MoS2 of large area, the HER activity of experimentally frequently observed grain boundaries (GBs) is examined by first-principles calculations. It is interesting to find the charge gathering in one dimension, and thus, GBs in MoS2 behave as metallic quantum wires with high conductivity. In comparison to the basal plane, GBs indicate enhanced HER activity with a significantly lower ΔG*H due to the unique local geometry and electronic properties. In this work, an effective and uniform descriptor Δεp→d is proposed, which can unambiguously unravel the origin of the enhanced HER activity of GBs, providing a theoretical guide for improving the electrochemical HER activity of other catalysts in general