The world's thinnest generator came out
Piezoelectric effect means that stretching or pressing a material causes it to generate a voltage or, conversely, applying a voltage causes the material to be stretched or shrunk. To date, scientists still do not observe the piezoelectric effect in materials of several atomic thicknesses. Wang Zhonglin, a professor of materials science and engineering at Georgia Tech, said: "The latest research not only provides new properties for 2D materials such as molybdenum disulfide, but also helps scientists develop new types of materials that use mechanical control Electronic equipment."
James Horne, another professor and professor of mechanical engineering at Columbia University, said: "This material is as thick as a single atomic layer and is expected to be made into wearable devices that may be integrated into fabric to move the human body The energy is converted to electricity to power wearable sensors , medical devices or cell phones. "
Wang Zhonglin said there are two key points to using MoS2 for power generation: use odd layers and let them bend in the right direction because even layers cancel each other out.
In a recent study, the Horn team placed thin, molybdenum disulfide flakes on a flexible plastic base and used optical techniques to determine the orientation of their lattices, after which they placed metal electrodes on the flakes. Wang Zhonglin team will measure the electrode installed in the sample provided by the Horn team, and then according to the sample deformation of the current measurement. They monitor the transition between mechanical and electrical energy and observe the voltage and current output.
The researchers said that when they change the direction of the applied tensile force, the output voltage will be reversed, and if the number of layers is even, then the voltage in the sample will disappear, which is the first time scientists in the odd layers of molybdenum disulfide In the piezoelectric effect was observed.
Wang Zhonglin said: "Materials like molybdenum disulphide do not exhibit piezoelectric effects when they are massive, but piezoelectric effects appear when their thickness is only one atom, which is fascinating."
In fact, molybdenum disulphide is one of the two-dimensional semiconducting materials of transition metal chalcogenides, which are all considered to have the same piezoelectric effect. The latest research may have unique properties and places of use for these materials Open the door.
Wang Zhonglin stressed that the latest research reveals for the first time the piezoelectric effect of two-dimensional materials and greatly expands the potential of multi-layer materials in the field of human-computer interaction, robotics , micro-electromechanical systems and active flexible electronic devices. In the end, we might be able to develop nano-systems of atomic thickness that can harness mechanical energy from the surrounding environment. (Liu Xia)
Corrugated Roof Sheet Roll Forming Machine is the special roll forming machine, it is for steel sheet cold-form industries. It can manufacture various of profiles according to customer`s requirements, PLC controlling system, hydraulic cutting. This equipment has many advantages, such as fast forming speed, high precision, easy operation, elegant appearence and so on.
Specifications:
Delta PLC computer control system with Chrizi inverter to ensure precision
Raw material
GI, PPGI, Aluminum coils
Material thickness range
0.3-0.8mm
Rollers
18 rows
Material of rollers
45# steel with chromed
Forming speed
25-30m/min(excluding cutting time)
Shaft diameter and material
76mm, material is 40Cr
Material of cutting blade
Cr12 mould steel with quenched treatment
Controlling system
Way of driven
1'' chain transmission
Voltage
380V/3Phase/50Hz or at your request
Main motor power
7.5KW
Hydraulic station power
3kW
Working process:
Decoiler - Feeding guide - Main roll forming machine - PLC control system - Hydraulic cutting - Receiving table
Pictures:
Training and Installation :
1. We offer installation service local in paid, reasonable charge.
2. QT test is welcome and professional.
3. manual and using guide is optional if no visiting and no installation.
Certification and after service:
1. Match the technology standard, ISO producing certification
2. CE certification
3. 12 months warranty since the delivery. Board.
Our advantage:
1. Short delivery period.
2. Effective communication
3. Interface customized.
Corrugated Roof Sheet Roll Forming Machine
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