To use all functions of this page, please activate cookies in your browser.
With an accout for my.chemeurope.com you can always see everything at a glance – and you can configure your own website and individual newsletter.
- My watch list
- My saved searches
- My saved topics
- My newsletter
Additional recommended knowledge
Any molecule can be deformed in several ways - A-A bond length, A-A-A angle, A-A-A-A torsion angle. Deformed molecule store energy, which can be released and cause mechanical work as the molecule return into its optimal geometrical conformation.
The term molecular string is usually used in nano-science and molecular biology, however theoretically also macroscopic molecular springs can be considered, if it is manufactured. Such a device composed for example of arranged ultra-high molecular mass polymer fibres (Helicene, Polyacetylene) could store extraordinary (0.1-10MJ/kg in comparison to 0.0003MJ/kg of clockwork spring) amount of energy which can be stored and released almost instantly, with high energy efficiency. The amount of energy storable in molecular spring is limited by the value of deformation the molecule can withstand until it undergoes chemical change. Manufacturing of such macroscopic device is however out of reach of contemporary technology, because of difficulties of synthesis and molecular arrangement of such long polymer molecules. In addition, the force needed to draw molecular string to its maximum length could be impractically high - comparable to the tensile strength of particular polymer molecule (~100GPa for some carbon compounds)
|This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Molecular_spring". A list of authors is available in Wikipedia.|