According to a report from the Physicist Organization Network on August 23 (Beijing time), a research team at Northwestern University in the United States used the strong attraction between two small organic molecules to create long crystals with ferroelectric properties. The material has strong memory, and it is expected to become a cheap and easy-to-use application material for computer and mobile phone memory applications (including cloud computing) in the future. The research results were published in the latest issue of Nature.
The special varieties of conventional ferroelectric polymers and ceramic materials are complicated and expensive to produce. The new compounds are simple and low-cost, and can be quickly and flexibly manufactured into lightweight, expandable new electronic materials, including computer memory, sensing devices, solar energy systems, and nanoelectronic devices.
The characteristics of the new supramolecular crystal material do not come from the molecule itself, but from the special alternating interactions between two small organic molecules that repeatedly cause them to self-assemble into an ordered network. At room temperature rather than below the temperature of liquid nitrogen, two complementary molecules attract each other under the action of electrons and form a very long crystal. This crystal is based on a complex of pyromellitic acid diimide and naphthalene, anthracene, and tetrathiafulvalene derivative acceptor, forming a highly ordered 3D network based on hydrogen bonding.
Professor Samuel Stoop, professor of chemistry, materials science and engineering, said that the new discovery will serve as a new guide for designing ferroelectric materials. This molecular design allows us to invent an almost infinite library of ferroelectric materials. Ferroelectric materials have spontaneous polarization and can reverse their polarity under the influence of an external electric field. These two possible directions attract researchers to develop this material into computer memory: because a specific direction can correspond to 1, and The other corresponds to 0.
Sir Fraser Studdard, Professor of Chemistry at the Weinberg Institute of Arts and Sciences at the University, believes that the behavior of newly created materials is complex, but the superlattice structure is very simple and it is particularly helpful in solving cloud computing. It is very expensive The maintenance fee.
Facebook, Google, web-based email and other services rely on volatile memory to store information in the cloud. When the power is turned off, the volatile memory will "forget" its saved information, so the power supply must be kept constant. If new types of ferroelectric materials are used to develop non-volatile memory, information can be retained even when the power is turned off. It is expected that if non-volatile memory is operated in cloud computing and electronic equipment in the U.S., annual electricity cost savings will be 6 billion U.S. dollars. (Reporter Hualing)
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