We all know that there are a lot of computing and storage components in electronic products such as mobile phones and computers. Generally speaking, the operating temperature of these electronic components can not exceed 125 ° C. Once these temperatures are exceeded, the components will have errors in calculation and data loss So in order to avoid this, electronics engineers set a high-temperature protection mechanism in their cell phones and computers: automatically shut down the power supply once the temperature is too high, and the electronic components in cell phones and computers generate additional heat during operation , Especially when playing games, the high load of electronic components can cause its temperature to increase rapidly, eventually triggering high temperature protection.
In fact, electronic components have been plagued by electronic engineers for fear of heat, for example, in the aerospace, military, geological exploration and oil and gas drilling industries where the electronic components are exposed to more extreme temperature conditions that are Requires stable operation above 300 ° C. Since traditional electronic components can not work at such a high temperature, engineers often rely on the cooling system to cool them down. Although this can ensure the normal operation of electronic components, Additional cooling systems add significant cost and energy to reduce reliability, so scientists and engineers are struggling to find 'hot and cold' electronic components.
Recently, a research team led by Professor Miao Feng of Nanjing University developed a 'hot-not-so-' electronic component and published their work in Nature Electronics.
Professor Miao Feng and colleagues selected two kinds of two-dimensional atomic crystal materials: molybdenum disulfide (molybdenum disulfide) and graphene as the memristor dielectric layer and electrode material respectively, to prepare the van der Waals heterojunction sandwich structure. The test results show that the heterojunction based on the full two-dimensional material can achieve a stable switch comparable to the traditional memristor: more than 10 million times of erasable times (more than the U disk we usually use) ??) ??), the erase speed is less than 100 nanoseconds, and has a good non-volatile. The team found that the structure of the memristor can be stable at temperatures up to 340 ℃ and maintain good erase performance. It is conceivable that if we apply it to electronic products such as cell phones and computers, users will not have to worry about overheating; in extreme environments, engineering machinery will also be able to get rid of the dependence on the cooling system.
Team and Nanjing University College of Modern Engineering and Applied Sciences Professor Wang Peng group cooperation, but also the use of transmission electron microscopy was studied in depth and found that the memristor heat resistance derived from the high thermal stability of molybdenum Sulfide crystals, And further reveal the working mechanism of oxygen ion mobility in these devices.The results show that such memristor has been very good in the process of erasing and writing by single crystal graphene and layered molybdenum trioxide with ultra-high thermal stability To protect the high temperature erase process to ensure the stability.
This research work not only shows the huge application prospect of two-dimensional layered heterostructure in the field of memristors, but also has important guiding significance for the design and research of electronic components in the extreme environment in the future. At the same time, Material heterostructures can combine the superior properties of different two-dimensional materials and also provide a possible common approach to solving the technical challenges of electronic devices in other fields.