Functionalized Truxenes: Adsorption and Diffusion of Single Molecules on the KBr(001) Surface
Functionalized Truxenes: Adsorption and Diffusion of Single Molecules on the KBr(001) Surface
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DOI：
10.1021/nn100424g
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发表时间：
2010-06-01
期刊：
影响因子：
17.1
通讯作者：
Echavarren, Antonio M.
中科院分区：
文献类型：
--
作者：
Such, Bartosz;Trevethan, Thomas;Echavarren, Antonio M.
在这项工作中，我们已经研究了在室温下使用非接触式原子力显微镜（NC-AFM）和理论建模的绝缘离子表面上的大功能化的有机分子的吸附和扩散。定制设计的顺式-5，10，15-三（4-氰基苯甲基）truxene分子以低覆盖率吸附在纳米级结构的KBr（001）表面上，并使用NC-AFM以原子和分子分辨率成像。观察到的分子迅速扩散沿着完美的单层台阶边缘和固定在单层扭结网站。广泛的原子模拟阐明了分子在不同表面特征上的吸附和扩散机制。本研究的结果表明，绝缘和纳米结构表面上的吸附物的扩散控制的方法。
In this work, we have studied the adsorption and diffusion of large functionalized organic molecules on an insulating ionic surface at room temperature using a noncontact atomic force microscope (NC-AFM) and theoretical modeling. Custom designed syn-5,10,15-tris(4-cyanophenylmethyl)truxene molecules are adsorbed onto the nanoscale structured KBr(001) surface at low coverages and imaged with atomic and molecular resolution with the NC-AFM. The molecules are observed rapidly diffusing along the perfect monolayer step edges and immobilized at monolayer kink sites. Extensive atomistic simulations elucidate the mechanisms of adsorption and diffusion of the molecule on the different surface features. The results of this study suggest methods of controlling the diffusion of adsorbates on insulating and nanostructured surfaces.