 |
According to a report recently organized by the Physicist Organization Network, American scientists have produced a man-made light-harvesting system and studied it. This system simulates the light-harvesting method of green sulfur bacteria. Green sulfur bacteria live on the sea floor, where there is almost no light, but it can manage to capture 98% of the light reaching the depths of the sea for its own use. Scientists said that a better understanding of this basic light-harvesting process will help find new ways to capture solar energy. The study was published in the latest issue of the journal Nature and Chemistry.
The research team led by Dossi Eisler of the MIT Electronic Research Laboratory developed the artificial system, which consists of a self-assembly system composed of dye molecules that can form exactly the same Double-walled nanotubes. The width of these nanotubes is only 10 nanometers, but it is tens of thousands of times longer and their size, shape and function are the same as those used by green sulfur bacteria to collect light from deep in the ocean.
Eisler said that such nanotubes are difficult to use for practical purposes. They are mainly used by scientists to study basic light-harvesting principles and find the most suitable materials for light-harvesting equipment to design new light-harvesting systems. She said: "How to effectively capture sunlight is one of the biggest secrets in nature. The artificial system we have developed may hopefully clarify this issue."
Unlike other self-assembled systems where each structure is slightly different, the shape and size of the double-walled nanotubes are exactly the same. Issler explained that this feature makes the system a perfect model for scientists to study their overall performance without having to study how each nanotube reacts to light.
The research team hopes to clarify a fundamental problem through experiments: whether the two coaxial double-walled nanotube cylinders work as a whole set of light-harvesting systems, or whether each cylinder has its own row. For this reason, they have lost one of their cylinders by oxidizing the outer wall molecules. Eisler said: "The tubular structure is unscathed, but the outer wall is no longer photoreactive, and only the inner wall is still photoreactive." Subsequently, by comparing the light response when two cylinders work together and only one cylinder works Scientists can determine the interaction between two cylinders. Eisler said: "Two cylinders can be seen as two separate systems."
A deeper understanding of the man-made structure will help researchers develop more efficient light-harvesting equipment. Eisler said: "The evolution of millions of years has allowed microbiological light-harvesting systems to achieve optimal results. Understanding their basic working principles will help us to create better man-made light-harvesting systems. Our goal is not that To improve the efficiency of existing solar cells, we want to use natural methods to create new light-harvesting equipment.†(Liu Xia)
The footlights are small in size, low in power consumption and long in service life. They are sturdy, durable, low in power consumption, long in service life, easy to install, unique and elegant in shape, anti leakage and waterproof;
1. The LED light source has a long service life. There is no accident and it is almost unnecessary to change the bulb. It can be used for several years after construction.
2. Low power consumption, no need to pay high electricity charges for lighting and beautification.
Step Light,Step Lamp,Stair Light,Wall Corner Light
JINGYING , https://www.jingyinglight.com