Scanning tunneling microscopy and spectroscopy of dialkyl disulfide fullerenes inserted into alkanethiolate SAMs

被引:33
作者
Kelly, KF
Shon, YS
Lee, TR
Halas, NJ
机构
[1] Rice Univ, Dept Elect & Comp Engn, Houston, TX 77005 USA
[2] Rice Univ, Rice Quantum Inst, Houston, TX 77005 USA
[3] Univ Houston, Dept Chem, Houston, TX 77204 USA
来源
JOURNAL OF PHYSICAL CHEMISTRY B | 1999年 / 103卷 / 41期
关键词
D O I
10.1021/jp9909661
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
Utilizing scanning tunneling microscopy, we have explored the self-assembling and electronic properties of unsymmetrical disulfides CH3(CH2)(n)SS(CH2)(n+1)NC60 (where n = 5 or 10, and C-60 = buckminster-fullerene) adsorbed onto Au(111). We analyzed self-assembled monolayers (SAMs) derived from the fullerene disulfides as well as SAMs formed by the insertion of the disulfides into self-assembled alkanethiol monolayers. By studying various combinations of fullerene disulfides and alkanethiols, we found that the degree of insertion is governed primarily by the chain length of the C60 tether relative to the surrounding alkanethiol matrix. In addition, we used the insertion technique to probe the electronic properties of the tethered fullerenes as a function of alkyl chain length.
引用
收藏
页码:8639 / 8642
页数:4
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