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首页> 外文期刊>Applied Surface Science >Functional bisimide dyes bound via electrostatic interactions to oxide nanostructures generated by AFM lithography
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Functional bisimide dyes bound via electrostatic interactions to oxide nanostructures generated by AFM lithography

机译：功能性双酰亚胺染料通过静电相互作用与AFM光刻产生的氧化物纳米结构结合

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摘要

Silicon oxide nanostructures have been functionalized by selective binding of a positively charged bisimide dye derivative. The structures were prepared by AFM nanolithography via local anodic oxidation (LAO) of dodecyl-terminated silicon and are negatively charged due to the production process. Therefore cationic spermine-functionalized perylene bisimide (sf-PBI) molecules can be bound to the structures by electrostatic interactions. The assembly of the sf-PBI units on the LAO nanostructures is verified by AFM height measurements and means of fluorescence microscopy. Emission spectra from the dye-functionalized oxide show that the molecules are able to form excimers. These excimers are characterized by a broad and featureless red-shifted emission band and an increased excited state life time. In contrast to the emission of sf-PBI films on uncharged silicon oxide, the excimer emission was found to decrease strongly low temperatures. This might be explained by a very tight binding due to the electrostatic attraction of the molecules to the LAO oxide.
机译：氧化硅纳米结构已通过带正电的双酰亚胺染料衍生物的选择性结合而功能化。该结构是通过AFM纳米光刻技术通过十二烷基封端的硅的局部阳极氧化（LAO）制备的，并且由于生产过程而带负电。因此，阳离子精胺官能化的per双酰亚胺（sf-PBI）分子可以通过静电相互作用结合到结构上。通过AFM高度测量和荧光显微术验证了sf-PBI单元在LAO纳米结构上的组装。染料官能化氧化物的发射光谱表明，分子能够形成准分子。这些受激准分子的特征在于宽广且无特征的红移发射带和增加的激发态寿命。与在不带电的氧化硅上发射sf-PBI膜相反，发现受激准分子的发射降低了低温。这可能是由于分子对LAO氧化物的静电吸引而引起的非常紧密的结合。

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  • 来源
    《Applied Surface Science》 |2014年第1期|51-58|共8页
  • 作者

    T. Baumgaertel; S. Rehm; F. Wuerthner; C. von Borczyskowski; H. Graaf;

  • 作者单位

    Institut fuer Physik, Optische Spektroskopie und Molekuelphysik und nanoMA, Technische Universiaet Chemnitz, Reichenhainer Str. 70, 09107 Chemnitz,Germany;

    Institut fuer Organische Chemie, Universitaet Wuerzburg, Am Hubland, 97074 Wuerzburg, Germany;

    Institut fuer Organische Chemie, Universitaet Wuerzburg, Am Hubland, 97074 Wuerzburg, Germany;

    Institut fuer Physik, Optische Spektroskopie und Molekuelphysik und nanoMA, Technische Universiaet Chemnitz, Reichenhainer Str. 70, 09107 Chemnitz,Germany;

    Institut fuer Physik, Optische Spektroskopie und Molekuelphysik und nanoMA, Technische Universiaet Chemnitz, Reichenhainer Str. 70, 09107 Chemnitz,Germany;

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  • 正文语种 eng
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  • 关键词

    Nanostructures; AFM lithography; Diimide dyes; Luminescence; Aggregate formation;

    机译：纳米结构;AFM光刻;二酰亚胺染料;发光;骨料形成;

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