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Publication Detail
Ultra long Copper Phthalocyanine Nanowires with New Crystal Structure and Broad Optical Absorption
  • Publication Type:
    Journal article
  • Publication Sub Type:
    Article
  • Authors:
    Wang H, Mauthoor S, Din S, Gardener JA, Chang R, Warner M, Aeppli G, McComb DW, Ryan MP, Wu W, Fisher AJ, Stoneham M, Heutz S
  • Publisher:
    AMER CHEMICAL SOC
  • Publication date:
    07/2010
  • Pagination:
    3921, 3926
  • Journal:
    ACS NANO
  • Volume:
    4
  • Issue:
    7
  • Print ISSN:
    1936-0851
  • Language:
    EN
  • Keywords:
    nanowire, phthalocyanine, organic vapor phase deposition, polymorph, molecular magnetism, molecular optoelectronics, TRANSISTORS, GROWTH, SPECTRA, FILMS
  • Addresses:
    Heutz, S
    Univ London Imperial Coll Sci Technol & Med
    Dept Mat
    London
    SW7 2AZ
    England

    Univ London Imperial Coll Sci Technol & Med
    London Ctr Nanotechnol
    London
    SW7 2AZ
    England

    UCL
    London Ctr Nanotechnol
    London
    WC1E 6BT
    England
Abstract
The development of molecular nanostructures plays a major role in emerging organic electronic applications, as it leads to improved performance and is compatible with our increasing need for miniaturization. In particular, nanowires have been obtained from solution or vapor phase and have displayed high conductivity or large interfacial areas in solar cells. In all cases however, the crystal structure remains as in films or bulk, and the exploitation of wires requires extensive postgrowth manipulation as their orientations are random. Here we report copper phthalocyanine (CuPc) nanowires with diameters of 10-100 nm, high directionality, and unprecedented aspect ratios. We demonstrate that they adopt a new crystal phase, designated eta-CuPc, where the molecules stack along the long axis. The resulting high electronic overlap along the centimeter length stacks achieved in our wires mediates antiferromagnetic couplings and broadens the optical absorption spectrum. The ability to fabricate ultralong, flexible metal phthalocyanine nanowires opens new possibilities for applications of these simple molecules.
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