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Spatial resolution of a type II heterojunction in a single bipolar molecule.
Tao, Chenggang; Sun, Jibin; Zhang, Xiaowei; Yamachika, Ryan; Wegner, Daniel; Bahri, Yasaman; Samsonidze, Georgy; Cohen, Marvin L; Louie, Steven G; Tilley, T Don; Segalman, Rachel A; Crommie, Michael F.
Afiliação
  • Tao C; Department of Physics, University of California at Berkeley, Berkeley, California 94720, USA.
Nano Lett ; 9(12): 3963-7, 2009 Dec.
Article em En | MEDLINE | ID: mdl-19904920
Bipolar molecules incorporating donor and acceptor components within a single molecule create exciting device opportunities due to their possible use as nanoscale p-n heterojunctions. Here we report a direct characterization of the internal electronic structure of a single bipolar molecular heterojunction, including subnanometer features of the intramolecular donor-acceptor interface. Angstrom-resolved scanning tunneling spectroscopy was used to map the energy levels and spatial extent of molecular orbitals across the surface of an individual bipolar molecule, bithiophene naphthalene diimide (BND). We find that individual BND molecules exhibit type II heterojunction behavior with orbital energy shifts occurring over subnanometer intramolecular interface distances. Comparison of this behavior with first-principles theoretical modeling provides new insights into the optimization of these molecular systems.
Assuntos

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Modelos Moleculares / Nanoestruturas / Imidas / Modelos Químicos / Naftalenos Idioma: En Revista: Nano Lett Ano de publicação: 2009 Tipo de documento: Article País de afiliação: Estados Unidos

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Modelos Moleculares / Nanoestruturas / Imidas / Modelos Químicos / Naftalenos Idioma: En Revista: Nano Lett Ano de publicação: 2009 Tipo de documento: Article País de afiliação: Estados Unidos