Self-Assembly of Alkyl-Substituted Oligothiophenes on MoS2: A Joint Experimental/Theoretical Study

详细信息    查看全文

• 作者：Nasima Afsharimani ; Andrea Minoia ; C茅dric Volcke ; Mathieu Surin ; Roberto Lazzaroni ; Jean-Yves Balandier ; Claude Niebel ; Yves H. Geerts ; Bernard Nysten
• 刊名：Journal of Physical Chemistry C
• 出版年：2013
• 出版时间：October 24, 2013
• 年：2013
• 卷：117
• 期：42
• 页码：21743-21751
• 全文大小：737K
• 年卷期：v.117,no.42(October 24, 2013)
• ISSN：1932-7455

文摘

The molecular arrangements of two different alkyl-substituted oligothiophenes, 伪,伪鈥?dihexylquaterthiophene (DH4T) and 伪,伪鈥?dioctylterthiophene (DOTT), in monolayers on molybdenum disulfide (MoS₂) were studied with a joint theoretical/experimental approach. Scanning tunneling microscopy was used both at the liquid/solid interface and in dry conditions to investigate the ordering of the conjugated oligomers in two-dimensional layers. DH4T and DOTT form well-ordered monolayers at large scales with interdigitated packing on MoS₂. In addition, DOTT exhibits an arrangement in which a dimer-type stacking of the conjugated backbone with an interlocking of the alkyl side chains is formed. Molecular modeling simulations have been used to provide insights into the microscopic morphology and to assess the stability of the different assemblies of DOTT and DH4T on MoS₂.