Helical Semiconductors

See allHide authors and affiliations

Science  07 Jun 2002:
Vol. 296, Issue 5574, pp. 1767
DOI: 10.1126/science.296.5574.1767b

One of the aims of supramolecular chemistry is to build assemblies of molecules in a controllable fashion. These structures are held together by relatively weak noncovalent interactions and thus might be easily reconfigurable into a variety of morphologies for possible applications in nanotechnology.

Sone et al. show that supramolecular structures can also serve as templates for building inorganic nanoscale objects with complex shapes. Preparing triblock “dendron rodcoil” molecules, which previously had been shown to self-assemble into a nanoribbon, in ethyl methacrylate yielded a twisted ribbon; when cadmium nitrate and hydrogen sulfide gas were added, a helix of cadmium sulfide formed on the template. Growth of this inorganic strand (about 1 micrometer in length) appeared to be restricted to one face of the ribbon, so that the pitch of the CdS helix (about 50 nanometers) was twice that of the underlying organic template. — JU

Angew. Chem. Int. Ed.41, 1705 (2002).

Stay Connected to Science

Navigate This Article