摘要:
A bio-enzyme sensor capable of super-hydrophobic solid-liquid-gas three-phase coexistence and a method for preparing the same. The bio-enzyme sensor comprises, from bottom to top, a base material with super-hydrophobic surface, a catalytic material having the function of catalyzing hydrogen peroxide, and bio-enzyme capable of reacting with a substance to be tested to generate hydrogen peroxide. A sufficient amount of oxygen can be provided for enzymatic reaction by forming a state of solid-liquid-gas three-phase coexistence on the surface of the super-hydrophobic material.
摘要:
The present invention discloses a porous lithium manganese phosphate-carbon composite material, and a preparation and application thereof. Multiple nano-pores are distributed in the composite material, and the composite material comprises a lithium manganese phosphate material and 0.1 wt% to 30 wt% of carbon, wherein the carbon is at least from amorphous carbon, carbon nanotubes or carbon nanofibers. The method for preparing the porous lithium manganese phosphate-carbon composite material comprises the following steps of: mixing a porous pyrophosphate material with a doped metal source, a lithium source, phosphate and a carbon source and then drying them to obtain a reaction precursor, and calcining the reaction precursor at a constant temperature under a protective atmosphere to obtain the composite material. The lithium manganese phosphate material contains compounds in a general formula of LiMn x M 1-x PO 4 , and the porous pyrophosphate material contains compounds in a general formula of (Mn x M 1-x ) 2 P 2 O 7 and 0 wt% to 50 wt% of carbon, where M comprises a transition metal, and 0.6‰¤x‰¤1. When applied in batteries, for example, used as the cathode material of Li-ion secondary batteries, the composite material provided by the present invention is high in specific capacity, rate performance and tap density, low in the content of carbon, high in the content of active substance, simple in preparation and easy for large-scale production.
摘要:
The invention provides a piezoresistive electronic skin, a preparation method and a use thereof. The piezoresistive electronic skin uses carbon nanotube film as the conductive layer and uses materials provided with micro-nano patterns, such as polydimethylsiloxane, polyethylene terephthalate, polyvinyl alcohol, polyvinyl formal, polyethylene, and so on, as the substrate, enabling the substrate has advantages of high flexibility and being pliable, and it needs low operating voltage and little power consumption, but has high sensitivity and short response time. More importantly, the invention uses the patterned flexible substrate as the basis, greatly improving the sensitivity of electronic skin reacting to tiny applied force from outside. The invention also provides a capacitive electronic skin and a preparation method thereof. Further, the invention also provides a use of the piezoresistive electronic skin or the capacitive electronic skin on speech recognition, pulse detection, medical robot, etc.
摘要:
A multi-junction solar cell that is lattice-matched with a base, and that includes a sub-cell having a desirable band gap is provided. It includes a plurality of sub-cells 11, 12, 13, and 14 that are laminated, and each include a first compound semiconductor layer and a second compound semiconductor layer that are laminated. At least one predetermined sub-cell 11 is configured of first layers 11A 1 and 11A 2 and a second layer 11C. In each of the first layers 11A 1 and 11A 2 , a 1-A layer 11A A and a 1-B layer 11A B are laminated. In the second layer 11C, a 2-A layer 11C A and a 2-B layer 11C B are laminated. A composition A of the 1-A layer 11A A and the 2-A layer 11C A is determined based on a value of a band gap of the predetermined sub-cell 11. A composition B of the 1-B layer 11A B and the 2-B layer 11C B is determined based on a difference between a base lattice constant of the base and a lattice constant of the composition A. Thicknesses of the 1-B layer 11A B and the 2-B layer 11C B are determined based on a difference between the base lattice constant and a lattice constant of the composition B, and on the thickness of the 1-A layer 11A A and the thickness of the 2-A layer 11C A .