Ahmad Imtiaz, Derkink Floor, Boulogne Tim, Bampoulis Pantelis, Zandvliet Harold J W, Khan Hidayat Ullah, Jan Rahim, Kooij E Stefan
Physics of Interfaces and Nanomaterials, MESA+ Institute for Nanotechnology, University of Twente, P. O. Box 217, 7500AE Enschede, The Netherlands.
Department of Physics, University of Peshawar, Khyber Pakhtunkhwa 25120, Pakistan.
Beilstein J Nanotechnol. 2019 Mar 13;10:696-705. doi: 10.3762/bjnano.10.69. eCollection 2019.
The formation of self-assembled superstructures of cetyltrimethylammonium bromide (CTAB) after drying on a nonwetting highly ordered pyrolytic graphite (HOPG) surface have been investigated using scanning electron microscopy (SEM) and atomic force microscopy (AFM). Although SEM did not reveal coverage of CTAB layers, AFM showed not only CTAB assembly, but also the dynamics of the process on the surface. The self-assembled layers of CTAB molecules on the HOPG terraces prior to nanorod deposition were shown to change the wettability of the surface, and as a result, gold nanorod deposition takes place on nonwetting HOPG terraces.
利用扫描电子显微镜（SEM）和原子力显微镜（AFM），对十六烷基三甲基溴化铵（CTAB）在不润湿的高度有序热解石墨（HOPG）表面干燥后形成的自组装超结构进行了研究。尽管SEM未显示CTAB层的覆盖情况，但AFM不仅显示了CTAB的组装，还显示了该过程在表面上的动力学。结果表明，在纳米棒沉积之前，HOPG平台上CTAB分子的自组装层改变了表面的润湿性，因此，金纳米棒沉积发生在不润湿的HOPG平台上。
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