Functional molecular element, process for producing the same and functional molecular device

Abstract

It is intended to provide a functional molecular element having a specific conductivity, which is a functional molecular element having a structure enabling reduction in the contact resistance at the interface between a constituting molecule and an electrode, a process for producing the same and a functional moleucalr device. A n-electron conjugated molecule (1), which is one species of linear tetrapyrrole having an almost disc-shaped central skeleton (2) and a flexible side chain (3) consisting of an alkyl group, is dissolved in 4-pentyl-4'-cyanobiphenyl or tetrahydrofuran and the concentration is adjusted to an appropriate level. This solution is adhered to electrodes (5) and (6) and the solvent is evaporated. Thus, an array structure (4) of the n-electron conjugated molecule (1) is self-organizingly formed. An adsorbed molecule (9) in the first layer of the array structure (4) is fixed in such a manner that its side chain (3) is adsorbed on the surface of the electrode (5) or (6) while the almost disc-shaped face of the sekeleton (2) is adhered in parallel to the surface of the electrode (5) or (6). The stacking direction of the n-electron conjugated molecule (1) in the second layer and thereafter of the array structure (4) is regulated by the n-n interaction between the disc-shaped face of the sekeletons (2).

Description

technical field [0001] The present invention relates to a functional molecular element with specific conductivity, its manufacturing method and functional molecular device. Background technique [0002] Nanotechnology is a method for observing, manufacturing and using -8 m = 10nm) fine structure technology. [0003] In the second half of the 1980s, an ultrahigh-precision microscope called a scanning tunneling microscope was invented, making it possible to see individual atoms and individual molecules. The use of scanning tunneling microscopes makes it possible not only to observe atoms and molecules, but to manipulate (manipulate) them one by one. [0004] For example, examples have been reported in which atoms are arranged on the surface of a crystal to draw characters and the like. Although it is possible to manipulate atoms and molecules, it is impractical to manufacture or assemble new materials or new devices by manipulating a large number of atoms or molecules one b...

AI Technical Summary

Problems solved by technology

[0030] However, the problem involved in the electrical connection through the connection between the thiol group and the gold electrode is that the molecule itself has electrical characteristics no matter how good, the connection part between its thiol terminal and the electrode has high resistance, and This high resistance limits the enhancement of molecular device properties (see, J.M.Wessels, H.G.Nothofer, W.E.Ford, F.von Wrochem, F.Scholz, T.Vossmeyer, A.Schroedter, H.Weller and A.Yasuda, "Optical and electrical properties of three-dimensional interlinked gold nanoparticle assemblies," Journal of the American Chemical Society, 126(10), 3349-3356, Mar 17, 2004)

Images