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首页> 外文期刊>Zeitschrift fur Anorganische und Allgemeine Chemie >TWO-DIMENSIONAL ARRANGEMENTS OF GOLD CLUSTERS AND GOLD COLLOIDS ON VARIOUS SURFACES
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TWO-DIMENSIONAL ARRANGEMENTS OF GOLD CLUSTERS AND GOLD COLLOIDS ON VARIOUS SURFACES

机译：各种表面上的金团簇和金胶体的二维排列

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Unstabilized and P(C6H4SO3H)(3)-stabilized gold colloids, respectively, having diameters of 13 +/- 1 nm, as well as Au-55 clusters, were chemically fixed on various surfaces. Oxidized silicon and quartz glass surfaces were treated by (MeO)(3)Si(CH2)(3)SH to generate monolayers of the SH-functionalized silanes with elimination of MeOH. Contact with aqueous solutions of unstabilized 13 nm gold colloids formed stable S-Au-bonds and resulted in a partial or complete coating of the surface by gold colloids, depending on the reaction time. Atomic force microscopic (AFM) investigations made the fixed gold particles visible. Another kind of fixation of gold colloids was reached on poly(ethyleneimine) (PEI)-coated mica surfaces. For that, P(C6H4SO3H)(3) stabilized gold colloids were used. Simple acid-base interactions between the SO3H groups of the colloids and the NH functions of the imine led to the desired coverage by the colloids. AFM investigations again were used for characterization. Au-55 clusters were arranged on gold(111) faces which have been produced by a heating 200 nm thick gold layer on chrome-plated quartz glass (tempax glass) to red heat, followed by spontaneous cooling. The Au(111) faces were then coated by 2-mercapthoethylamine. The interactions of the free NH2 groups with the SO3H functions of the cluster molecules Au-55(Ph2PC6H4SO3H)(12)Cl-6 led to their chemisorption from the aqueous solution. In this case, the conducting gold substrate enabled the characterization of the cluster-monolayer by scanning tunneling microscopy (STM). [References: 22]
机译：直径分别为13 +/- 1 nm的未稳定和P（C6H4SO3H）（3）稳定的金胶体以及Au-55簇化学固定在各种表面上。用（MeO）（3）Si（CH2）（3）SH处理氧化的硅和石英玻璃表面，以生成单层的SH-官能化硅烷并消除MeOH。与不稳定的13 nm金胶体的水溶液接触形成稳定的S-Au键，并取决于反应时间，导致金胶体部分或完全覆盖表面。原子力显微镜（AFM）研究使固定的金颗粒可见。金胶体的另一种固定方式是在涂覆有聚乙烯亚胺（PEI）的云母表面上进行。为此，使用了P（C6H4SO3H）（3）稳定的金胶体。胶体的SO3H基团与亚胺的NH功能之间的简单酸碱相互作用导致所需的胶体覆盖率。原子力显微镜调查再次用于表征。 Au-55团簇排列在金（111）面上，通过在镀铬石英玻璃（tempax玻璃）上加热200 nm厚的金层至赤热，然后自然冷却来生成Au-55团簇。然后用2-巯基乙胺涂覆Au（111）面。游离NH 2基团与簇分子Au-55（Ph2PC6H4SO3H）（12）Cl-6的SO3H功能的相互作用导致其从水溶液中的化学吸附。在这种情况下，导电金基底可通过扫描隧道显微镜（STM）表征簇状单分子层。 [参考：22]

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