Gold coated AFM tips

Fig. 4.2 Schematic of alkanethiol monolayer-modified gold-coated AFM tip used for CFM and interactions between exposed functional groups on the contacting surfaces (right chemically modified AFM tip and functionalized surface. Different functionalities, and interactions are indicated by different gray scales and arrows, respectively). For details on the self-assembled monolayer-based tip functionalization, see text (adapted/reproduced with permission from [11])...

Fig. 6. (A) Schematic representation of a gold substrate and gold-coated AFM tip, modified with a thin film of poly(vinylferrocene) (PVF). The tip and film were mounted inside a glass fluid cell in an atomic force microscope and held under potential control. Also shown are typical force curves for (B) the interaction between neutral polymer films and (C) interactions between oxidized polymer films.

Fig. 10.15 Raman spectrum demonstrating gold-coated AFM tip that causes a local surface-enhanced Raman effect on a sulfur film (A). When the beam is focused away...

To obtain a better understanding of the sigmoid kinetics observed for hydrolysis and aminolysis reactions, as discussed in the previous sections, these reactions were investigated on the nanometer scale by iCFM. In these experiments the force required to pull gold-coated AFM tips functionalized with SAMs of NHS-CIO away from contact with an inert octadecanethiol (ODT) SAM on flat Au(lll) was monitored in real-time during reaction in aqueous NaOH and n-butylamine for hydrolysis and aminolysis, respectively. 

The complexation behavior of SAMs of P-CD 1 was measured by single molecule force spectroscopy (Figure 4). Gold-coated AFM tips were modified with a mixed SAM of 2-hydroxy-ethanethiol and 6-ferrocenyl-hexanethiol. As shown by cyclic voltammetry experiments the mixed SAMs contained 1 % - 2 % 6-ferrocenyl-hexanethiol. The dilution was carried out in order to reduce the number of possible interactions and to maximize the conformational freedom of the immobilized ferrocene moieties. 

Figure 14 Distribution of the rupture distances obtained from the bridging interactions in DMF between a PNSA electrografted onto silicon, from a 0.1 M monomer solution, and from a gold-coated AFM tip. ...

Figure 6.5. Schematic demonstrating the functionalization of gold-coated AFM tips with self-assembled monolayers. (From Schonherr et al. [65] reproduced with permission.)...

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