Many people know that Moore's Law reveals the same development speed of information technology myth; but what many people don't know is that in 2018, information storage technology based on silicon-based materials will face a "big limit" in development. The research group led by specially appointed professor Chen Yu of East China University of Science and Technology recently discovered that graphene materials can effectively expand the information storage space, thus making significant progress in the research field of new organic polymer information storage materials based on graphene. The research results were published online recently in the latest issue of the Review of the Royal Society of Chemistry. The development of information storage has followed Moore's Law for a long period of time, that is, with the price unchanged, every 18 months, the number of transistors that can be accommodated in the integrated circuit and its performance will double. Since 2000, in order to meet the increasing demand for data storage density and access speed, the microelectronics industry has reduced the size of storage elements that make up chips from 130 nanometers to the current 45 nanometers. By 2018, silicon-based semiconductors will reach the physical limit of 16 nanometers. Chen Yu said that beyond this limit, transistor leakage will occur, adjacent memory cells in the integrated circuit will also affect each other, and the reliability and stability of memory devices will be greatly affected. In addition, the preparation of silicon-based devices has the problems of expensive equipment, complicated lithography process and peripheral integrated circuits, and limited two-dimensional storage density. "When we enter the" nanoelectronics "era from the" microelectronics "era, when developing the next generation of storage technology, we need to introduce new concepts, materials and technologies. New materials are always the foundation and focus of the modern electronics industry. Chen Yu said. Chen Yu told the China Science News that the use of polymer materials to prepare resistive memory devices provided a new way of thinking for the development of very large scale integrated circuits. Compared with silicon-based materials, polymer materials have obvious advantages. It is easy to process, low in cost, low in power consumption, light in weight, small in volume, high in storage density, and can be stacked in three dimensions. On plastics and integrated circuits, the molecular structure can be carefully tailored as needed to control the storage performance of materials and corresponding devices. However, in order for a polymer material to be capable of resistive memory devices, it must have electrical bistable characteristics that can be used to implement binary encoding and digital information storage. Simply put, when a sufficiently large external voltage is applied across the material film, the device can change from a low conductivity state (OFF) to a high conductivity state (ON). If the external electric field is cancelled, it can continue to maintain the OFF or ON state stably, indicating that the device has memory performance and is expected to become a storage device. If the device can be restored from the ON state to the OFF state through external stimulation, the device is rewritable. "The OFF state and the ON state here are equivalent to the '0' state and the '1' state in the binary system, and the external power signal is equivalent to the operation of writing, reading or erasing information." Chen Yu said. In order to achieve these goals, in the past three years, Chen Yu's group has used graphene and its derivatives as the building blocks, and has successively designed and prepared a series of new models with erasable storage or write once and read multiple functions. Functional polymer information storage materials, put forward a new idea of ​​"nano-pre-assembly" method to prepare memory devices and improve the stability of devices The new storage materials have made breakthroughs in several key indicators such as starting voltage, switching ratio, thermal stability, maintenance time, read-write cycle, and storage density, some of which are close to or meet the needs of actual application technology.
Outdoor furniture is furniture designed for use in outdoor Spaces, usually in outdoor environments such as gardens, balconies, terraces, courtyards or around swimming pools. These furniture are usually made of weather-resistant materials to resist the effects of sun, rain, wind and other natural factors to ensure their long-term durability and beauty.
Outdoor Furniture Set , Outdoor Garden Furnitur , Chair Outdoor Garden Furnitur ,Garden Furniture Outdoor, Outdoor Home Furnitur Shenzhen Guang Disen Furniture co.,ltd , https://www.gdisenfurniture.com
There are many types of outdoor furniture, including:
Garden Table and chair combination: Includes outdoor tables and chairs for outdoor dining, resting or entertaining activities.
Loungers and rockers: outdoor chairs used for resting, sunbathing, or relaxing, usually with comfortable backs and cushions.
Umbrellas and awnings: Provide outdoor space with sun protection and shelter, so that people can enjoy the sun comfortably in an outdoor environment.
Hammock: A hanging outdoor Bed often used for relaxation and rest.
Beach chairs and folding chairs: Light, portable chairs for outdoor camping, picnics or beach activities.
The materials of outdoor furniture are common aluminum alloy, plastic, resin, wood, artificial wood and metal. Choosing the right outdoor furniture should take into account the climatic conditions of the area, the size of the space, the design style and personal preferences to ensure that the furniture can meet the needs and coordinate with the outdoor environment.