STM investigation of the dependence of alkane and alkane (C18H38, C19H40) derivatives self-assembly on molecular chemical structure on HOPG surface
STM investigation of the dependence of alkane and alkane (C18H38, C19H40) derivatives self-assembly on molecular chemical structure on HOPG surface
复制标题
HOPG表面烷烃及烷烃(C18H38、C19H40)衍生物自组装对分子化学结构依赖性的STM研究
DOI：
10.1016/j.susc.2008.01.030
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发表时间：
2008-03-15
期刊：
影响因子：
1.9
通讯作者：
Zhang, De-Qing
中科院分区：
文献类型：
--
作者：
Chen, Qing;Yan, Hui-Juan;Zhang, De-Qing
烷烃分子及其衍生物由烷基链和官能团组成，主导分子间和分子/底物的相互作用，并在固体表面产生不同的自组装。本文利用扫描隧道显微镜（STM）在室温和环境条件下研究了烷烃和烷烃（C18H38:C19H40）衍生物在HOPG表面上的自组装体，以了解这些自组装体的结构和稳定性，并揭示其自组装体对其化学结构的依赖性。研究发现，十三烷(C13H28)、十四烷(C14H30)、十五烷(C15H32)等烷基链较短的烷烃分子可以在HOPG上形成层状结构，并能通过STM稳定成像。另一方面，在C18H38和C19H40的一系列衍生物形成的自组装体中可以观察到线性或人字形结构。基于STM结果对结果进行讨论，以了解烷烃分子自组装体的结构和结构稳定性。 (c) 2008 Elsevier B.V. 保留所有权利。
Alkane molecules and their derivatives are composed of alkyl chain and functional groups that dominate the interactions of intermolecule and molecule/substrate and result in different self-assemblies on solid surface. In the present paper, the self-assemblies of alkanes and alkane (C18H38:C19H40) derivatives are studied on HOPG surface at room temperature in ambient conditions by scanning tunneling microscopy (STM) to understand the structure and stability of these self-assemblies and to reveal the dependence of their self-assemblies on their chemical structures. It is found that the alkane molecules with short alkyl chains such as tridecane (C13H28), tetradecane (C14H30) and pentadecane (C15H32) can form lamellar structures on HOPG and be steadily imaged by STM. On the other hand, linear or herrinebone structures can be observed in the self-assemblies formed by a series of derivatives of C18H38 and C19H40. The results are discussed based on STM results to understand the structures and structural stability of alkane molecular self-assemblies. (c) 2008 Elsevier B.V. All rights reserved.