TY - JOUR
T1 - Low-Temperature scanning tunneling microscopy investigation of bis(phthalocyaninato)yttrium growth on au(111)
T2 - from individual molecules to two-dimensional domains
AU - Zhang, Yan Feng
AU - Isshiki, Hironari
AU - Katoh, Keiichi
AU - Yoshida, Yusuke
AU - Yamashita, Masahiro
AU - Miyasaka, Hitoshi
AU - Breedlove, Brian K.
AU - Kajiwara, Takashi
AU - Takaishi, Shinya
AU - Komeda, Tadahiro
PY - 2009/6/4
Y1 - 2009/6/4
N2 - We show a 4.8 K STM observation of a double-decker bis(phthalocyaninato) yttrium (YPc2; Pc ) phthalocyanine) molecule adsorption on Au(111) substrate. An eight-lobed structure was imaged as the submolecule STM contrast of a single molecule both in an isolated state and in a molecule film. This feature arises from the top Pc group, where both sides of the four phenyl rings are highlighted. As an isolated molecule, the adsorption orientation is determined by the lower Pc, the diagonal axis of which aligns parallel to the close-packed direction of Au(111). In a 2D film, a near-square molecule lattice appears with a unit of ̃1.47 × 1.38 nm2, and one of the lattice vectors is rotated by ̃15° from the close-packed direction. A tentative model is provided to illustrate the molecule array where neighboring molecules are rotated by ̃30° from each other. In this way, the lower Pcs should align along the [101̄] and [2̄11] directions (or their equivalent directions) alternately. All these facts illustrate the molecule-substrate and the molecule-molecule interactions in the initial adsorption and in the film accumulation.
AB - We show a 4.8 K STM observation of a double-decker bis(phthalocyaninato) yttrium (YPc2; Pc ) phthalocyanine) molecule adsorption on Au(111) substrate. An eight-lobed structure was imaged as the submolecule STM contrast of a single molecule both in an isolated state and in a molecule film. This feature arises from the top Pc group, where both sides of the four phenyl rings are highlighted. As an isolated molecule, the adsorption orientation is determined by the lower Pc, the diagonal axis of which aligns parallel to the close-packed direction of Au(111). In a 2D film, a near-square molecule lattice appears with a unit of ̃1.47 × 1.38 nm2, and one of the lattice vectors is rotated by ̃15° from the close-packed direction. A tentative model is provided to illustrate the molecule array where neighboring molecules are rotated by ̃30° from each other. In this way, the lower Pcs should align along the [101̄] and [2̄11] directions (or their equivalent directions) alternately. All these facts illustrate the molecule-substrate and the molecule-molecule interactions in the initial adsorption and in the film accumulation.
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U2 - 10.1021/jp902410q
DO - 10.1021/jp902410q
M3 - Article
AN - SCOPUS:66849099795
VL - 113
SP - 9826
EP - 9830
JO - Journal of Physical Chemistry C
JF - Journal of Physical Chemistry C
SN - 1932-7447
IS - 22
ER -