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27 February 2019 Growth of organic nonlinear nanowires through a one-drop self-assembly method
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In our previous study, we demonstrated that a surface supported rapid evaporation crystallization (SSREC) method can be utilized to effectively prepare single nanometer nanocrystals (NCs) of 4-N, N-dimethylamino-4’-N’-methylstilbazolium tosylate (DAST), a bench mark of organic nonlinear optical (NLO) crystal. In this study, first, we extend the SSREC method to DAST single crystal nanowires (NWs) preparation by using a polymer-type surfactant. With one-drop of DAST-methanol solution, millimeter-scale the DAST NWs can be attained within one minute. We presume that this highly efficient driving forces of the fast self-assembling process originate from Coulombic interactions of the DAST nanocrystals. In order to further increase the crystal quality of the NWs, we propose a one-drop self-assembly process which separates the SSREC self-assembling process into two steps: SSREC process for NCs preparation and static cultivation process for NWs self-assembly. By this method, we successfully attain 4-N, N-dimethylamino-4'-N'-methylstilbazolium 2-naphthalenesulfonate (DSNS-2) NWs. The obtained DSNS-2 NWs have very high surface quality with surface roughness <150 pm, which is highly beneficial for fabricating integrated optical devices. Furthermore, the onedrop self-assembly method only requires reagents in microgram quantities, and thus this method is extremely environment-friendly.
Conference Presentation
© (2019) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Bin Cai, Lanfang Zhu, Shuting Guan, Tian Tian, Chenyin Wu, and Okihiro Sugihara "Growth of organic nonlinear nanowires through a one-drop self-assembly method", Proc. SPIE 10915, Organic Photonic Materials and Devices XXI, 1091513 (27 February 2019);

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