Colloidal binding energy

Accordingly, TEM investigations confirmed the NPs formation in Pt-catalysed hydrosilylation from a solution of [PtCl2(cod)]. The particles formed in situ showed a mean size of 2.3 nm. Moreover, XPS (X-ray Photoemission Spectrometry) analysis confirmed that the colloid characteristics are distinct from bulk metal and monometallic complex (binding energy for Pt bulk metal is 71.0 eV for [PtCl2(cod)], 72.45 eV and for Pt colloid, 72.24eV) [12]. 

Fig. 4.21. Normalized XPS spectra of the Pt 4f region for (1) 130-nm Pt dots on ceria, (2) Pt film exposed to all the steps in the colloidal lithography process, (3) untreated Pt film, as reference. The samples were analyzed (a) as-prepared (b) after heating in vacuum to 400° C and cooled to room temperature (c) after reduction in H2 plasma (SOOmTorr, 250 W, 2min). The binding energies were referenced to adventitious carbon at 284.8eV (from [92])...

Deraguin Landau Vervey-Overbeek (theory of colloid stability) cation binding energy from XPS spectrum N N dimethyl formamide dimethyl sulfoxide... 

Tirado-Miranda, M., Schmitt, A., CaUqas-Femandez, J. and Femandez-Barbero, A. (1999). Colloidal clusters with finite binding energies fractal structure and growth mechanism. Langmuir, 15, 3437—3444. 

Fig. 4.4. Variation of the shifts in the core-level binding energies (relative to the bulk metal value) of (a) Pd and (b) An nanocrystals, with the average diameter. The diameters were obtained from HREM and STM images. In the case of An clusters, data for a colloidal particle and an Aubb compound are also shown (reproduced with permission from [661])...

Tuado-Miranda, M., A. Schmitt, J. Callejas-Femandez, and A. Femandez-Barbero. 1999. Colloidal clusters with finite binding energies Fractal stmcture and growth mechanism. Langmuir 15 (10) 3437-3444. 

Fig. 31 Overall interaction energy between two DNA-coated colloids, (a) Sketch of the interacting surfaces of two spheres of radius R0 separated by d. The maximum length of hybridized strands is 2L. (b) Total interaction energy as a function of d. It is the sum of the attractive I/DNA from the binding of accessible DNA strands, the repulsive I/rep from electrostatics and/or polymer steric effect, and the van der Waals attraction t/vdw. (c) For weak, short-range I/rep, particles which are unbound at high temperatures are irreversibly trapped in the van der Waals well after DNA hybridization at low temperatures, (d) For strong, medium-range I/rep, DNA binding produces a secondary minimum of reversible aggregation. Reproduced with permission from [138]...

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