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Updated: Mar 23, 2026

Ultrahigh Density Array of Vertically Aligned Small-molecular Organic Nanowires on Arbitrary Substrates
Published on: June 18, 2013
Tailoring the core electron density in modulation-doped core-multi-shell nanowires
Fabrizio Buscemi1, Miquel Royo2,3, Guido Goldoni1,4
1Department of Physics, Informatics, and Mathematics, University of Modena and Reggio Emilia, Via Campi 213/A, I-41125 Modena, Italy.
Abstract:
We show how a proper radial modulation of the composition of core-multi-shell nanowires (NWs) critically enhances the control of the free-carrier density in the high-mobility core with respect to core-single-shell structures, thus overcoming the technological difficulty of fine tuning the remote doping density. We calculate the electron population of the different NW layers as a function of the doping density and of several geometrical parameters by means of a self-consistent Schrödinger-Poisson approach: free carriers tend to localize in the outer shell and screen the core from the electric field of the dopants.
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