Soft skin-like optoelectronic devices, extremely tiny nanorobots ... These seemingly dreamy technologies will become reality due to the world's first "metal-free perovskite ferroelectric" materials. On July 13, the team of Xiong Rengen and You Yumeng from Southeast University once again made important research progress in the field of "molecular ferroelectric materials". They first discovered metal-free perovskite-type ferroelectrics, which is an important material family of perovskite New members have been added, and related research results were published online in the journal Science on the 13th. There are two common perovskite materials, inorganic perovskite and organic-inorganic hybrid perovskite. Advanced equipment, from lighters to space shuttles, requires the application of such materials. However, these two types of perovskite materials carry metal elements, which makes their processing and preparation more difficult. Moreover, certain metal elements (such as lead) can cause serious environmental problems. For many years, people have been looking for the third type of perovskite family-all-organic perovskite materials, that is, metal-free perovskite. After years of research, the molecular ferroelectric team of Southeast University used charged molecular groups to replace inorganic ions and successfully prepared a large class of 23 all-organic new perovskite materials. Since there are no metal elements, the metal-free perovskite material will have the characteristics of flexibility, easy processing, low energy consumption, low pollution, etc., and its inherent organic composition can bring wider application prospects to the material. It is worth mentioning that the team also synthesized the left-hand enantiomer, right-hand enantiomer and racemic compound of the four materials, and proved their ferroelectricity respectively. At present, there have been no reports on examples of left-handed, right-handed and achiral compounds having ferroelectricity at the same time. Such materials will also gain broader application prospects in data storage, optical quantum communication and other fields. (Reporter Zhang Ye, Intern Wu Ruohan) Threaded rods, also known as tooth bar, Screw, full thread stud, etc., has no head, and is a fastener with full thread on the threaded post and guide angle at both ends. It is generally used as the connection between thicker parts and is mostly used for fastening in the mechanical industry. Threaded Rod,Threaded Bar,All Thread Rod,Lowes Threaded Rod Jiangsu Jiajie Special Screw Co., Ltd , https://www.tzbolts.com