British and Japanese researchers have collaborated to develop a new method of supramolecular assembly that promises to bring superior molecular electronic devices that are superior to silicon materials, such as the soft TV screens made with Buckyballs, which will bring people new audiovisual experiences. . Researchers believe that this method has great potential for application and may revolutionize the production of new materials. Related papers were published in the June 22 issue of Nature and Chemistry.
There are tiny forces between adjacent molecules. Supramolecular assembly takes advantage of the additive effect of the non-covalent bonds to form an ordered structure. The new method focuses on the study of intermolecular forces, especially those "amphiphilic" molecules. "Amphiphilic" molecules contain both hydrophilic and hydrophobic components. For example, household detergents rely on the interaction between amphiphilic molecules to remove stains: one end is a hydrophilic base, which is easy to combine with water to form a molecular bond, and the other end is hydrophobic and likes to combine with oily substances. If the detergent is added to the dirty water, its molecules will turn in the direction of the hydrophobic base towards the oil, and cluster around the oil to form molecular clusters.
According to the report of the Physicist Organization Network on June 22, the new method was developed by the team of the Martin Horanbeier of the University of Kiel in the United Kingdom and the Sino-Silung team of the National Institute of Materials Science in Japan. "The concept of" further expanding it into "solvent-based" and "solvent-based" has become a universal universal method.
The amphiphilic molecule used in the experiment was a tailored "buckyball", but with a long tail, it was like "molecular warts." Buckyball is a football-like molecule composed of 60 carbon atoms (C60), also called fullerenes. The amphiphilic molecules are added to the solvent and the tails interact to form the core of the buckyball and the outer shell of the carbon chain. The n-alkanes were added to the mixture, and the molecules were assembled into micelles and hexagonal gel fibers containing insulated C60 nanowires. The pure C60 was added and the proportion of π-conjugated materials was increased, and the molecules were assembled into a sheet-interlayer structure. These structures contain a large proportion of optoelectronic active materials and exhibit a certain degree of photoconductivity.
In this new method of flexible supramolecular assembly, tiny changes in chemical structures and additives (solvents or C60) can produce extremely diverse structures. This level of in-depth control of complex molecular self-assembly is something that was previously unattainable.
The researchers pointed out that this new result is expected to have a significant impact on the field of "molecular electronics", and carbon-based electronic devices may replace traditional silicon technology products. The new molecular electronic components only need to adjust the intermolecular forces to optimize the performance, which can greatly improve the performance of the equipment, make the efficiency higher and the energy consumption lower, bring flexible and flexible, multi-functional tool equipment and cheaper products, such as Smartphones, TV screens, etc. By the time of the next World Cup in 2018, people may be watching football with "molecular football." (Chang Lijun)
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