Gold adsorbed silicon

Different cyclodextrin monolayers have been synthesized and their surface properties have been characterized. Kaifer et al. prepared per-6-thiol-cyclodextrins, and described the interfacial monovalent ferrocene complexation at the monolayer.55 Mittler-Neher et al. studied the kinetics of the adsorption of mono- and multithiolate-functionalized CD SAMs.56,57 Beulen et al.,58 Huskens et al.,59 Auletta et al.,60 and Nijhuis et al.61 reported on the concept of molecular printboards, that is, (3-cyclodextrin ((3-CD) SAMs on gold or silicon oxide substrates, onto which complementary multivalent guest-functionalized dendrimer molecules were adsorbed, resulting in the formation of kinetically stable supramolecular assemblies. With the... 

Fig. 11 Laterally gold structured silicon wafer to control the spatial adsorption of PVFA-co-PVAm (a) photograph of the gold structured silicon wafer (genuine size of the gold islands 45 pm by 45 pm), (b) spatially resolved XPS image of the lateral gold layer (the Au 4f peak is depicted in black whilst the peaks of O 1 s and Si 2p are pale), (c) spatially resolved XPS image of 11-mercaptoundecanoic acid adsorbed on the laterally structured gold layer (the S 2p peak is depicted in white whilst Si 2p is dark)...

PAPER X(iv) Properties of polymeric liquid lubricant films adsorbed on patterned gold and silicon surfaces under high vacuum... 

In this contribution, we employ local dielectric spectroscopy (LDS), a method recently used to characterize relaxation dynamics of ultrathin polymer films at nanometer scale [45 7], to study the evolution of irreversibly adsorbed layers in poly(vinyl acetate) films deposited on different solid substrates, i.e. aluminum, gold and silicon, under annealing above the Tg [30, 41, 48]. After describing the setup and sample preparation in Sect. 7.2, we present, in Sect. 7.3, our results on the growth of the layer as a function of the interfacial interaction. The influence of the adsorbed layer on the relaxation dynamics of nano-confined PVAc films and their capacity to absorb moisture in various degrees of relative humidity is studied in details. 

The left picture shows aggregates of silicon oxide particles with a diameter of 0.9 pm (see example 1.1). At the bottom an atomic force microscope image of cylindrical CTAB micelles adsorbed to gold(lll) is shown (see example 12.3, width 200 nm). The right image was also obtained by atomic force microscopy. It shows the surface of a self-assembled monolayer of long-chain alkylthiols on gold(lll) (see fig. 10.2, width 3.2 nm). 

These co-mercaptoalkyl carboxylic acids were selectively adsorbed from ethanol solution (1 mmol L-1) only on the gold dots which were laterally deposited in the first step on the silicon wafer. Imaging-XPS analysis revealed the success of the laterally controlled adsorption of the tu-mercaptoalkyl carboxylic acids which can only be seen on areas coated by gold islands and not on the silica bars in between (Fig. 11). 

Fig. 4 shows the adsorption isotherm of n-propanol on the QCM sensor at room temperature. The observed trend of the n-propanol film thickness as a function of partial pressure is consistent with the general characteristic of the alcohol adsorption isotherm observed for other systems. The inset in Fig. 4 gives the approximate thickness of the adsorbed alcohol layer on the QCM sensor measured at a partial pressure of 90 10% to the saturation pressure of each alcohol. The actual alcohol thickness on the clean, hydrophilic silicon oxide surface would be slightly larger than that on gold. 

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