Anisotropic ordered planar growth of α-sexithienyl thin films

被引:63
作者
Prato, S
Floreano, L
Cvetko, D
De Renzi, V
Morgante, A
Modesti, S
Biscarini, F
Zamboni, R
Taliani, C
机构
[1] INFM, Area Ric, Lab TASC, I-34012 Trieste, Italy
[2] Ist Spettroscopia Mol, Consiglio Nazl Ric, I-40129 Bologna, Italy
[3] APE Res, Trieste, Italy
[4] Univ Ljubljana, J Stefan Inst, Ljubljana 61000, Slovenia
[5] Univ Trieste, Dipartimento Fis, I-34127 Trieste, Italy
来源
JOURNAL OF PHYSICAL CHEMISTRY B | 1999年 / 103卷 / 37期
关键词
D O I
10.1021/jp9905878
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
We show how the anisotropy of the (1 x 2) reconstructed Au(110) surface can be effectively used to achieve spontaneous ordered planar growth of rodlike conjugated oligomers uniaxially oriented on the substrate. The growth of the first few monolayers of alpha-sexithienyl (T6) films on the (1 x 2) reconstructed Au(110) surface in ultrahigh vacuum has been investigated by He atom scattering (HAS), scanning tunneling microscopy (STM), and low-energy electron diffraction (LEED). T6 molecules lie flat on the substrate forming long chains along the [110] direction of the Au rows. The interchain spacing is coverage dependent and uniaxially commensurate with the substrate along [001]. Three ordered structures with 12, 16, and 20 Angstrom periods are formed during the deposition of the first two T6 monolayers. This T6 overlayer acts as a template for the growth of at least five monolayers which are still planar and orientationally ordered.
引用
收藏
页码:7788 / 7795
页数:8
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