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Organization of Organic Molecules with Inorganic Nanoparticles: Hybrid Nanodiodes

Publication Type : Journal Article

Publisher : Advanced Functional Materials

Source : Advanced Functional Materials Volume 18 Issue 5 Pages 687-693, 2008

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Campus : Coimbatore

School : School of Physical Sciences

Center : Center for Industrial Research and Innovation (ACIRI)

Year : 2008

Abstract : A monolayer of inorganic nanoparticles and a monolayer of organic molecules have been electrostatically assembled in sequence. Such assemblies or organizations exhibit electrical rectification. When the sequence of the organization is reversed, the direction of rectification becomes opposite. In both n-type ZnO/organic and organic/n-ZnO assemblies, electron flow is favorable from the n-ZnO nanoparticle to the (electron-accepting) organic molecule. While the individual components do not show any rectification, substitutes of the organic molecule tune electrical rectification. Junctions between a p-type ZnO nanoparticle and an electron-donating metal phthalocyanine favor current flow in the nanoparticle-to-phthalocyanine direction. The rectification in a junction between a nanoparticle and an organic molecule is due to the parity between free carriers in the former component and the type of carrier-accepting nature in the latter one. By observing electrical rectification with the tip of a scanning tunneling microscope, organic/inorganic hybrid nanodiodes or rectifiers on the molecular/nanoscale have been established.

Cite this Research Publication : Kallol Mohanta, Sudip K Batabyal, Amlan J Pal, "Organization of organic molecules with inorganic nanoparticles: hybrid nanodiodes", Advanced Functional Materials Volume 18 Issue 5 Pages 687-693, 2008

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