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Existence of a Lower Critical Radius for Incorporation of Silica Particles into Zinc during Electro-codeposition

MPG-Autoren
http://pubman.mpdl.mpg.de/cone/persons/resource/persons58799

Marlow,  Frank
Research Group Marlow, Max-Planck-Institut für Kohlenforschung, Max Planck Society;

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Zitation

Khan, T., Vimalanandan, A., Marlow, F., Erbe, A., & Rohwerder, M. (2012). Existence of a Lower Critical Radius for Incorporation of Silica Particles into Zinc during Electro-codeposition. ACS APPLIED MATERIALS & INTERFACES, 4(11), 6221-6227. doi:10.1021/am301821m.


Zitierlink: http://hdl.handle.net/11858/00-001M-0000-000E-F22B-E
Zusammenfassung
Recently, it was shown that the surface modification of silica particles with -SH functional groups enables their electro-codeposition with zinc. Here, however, we report that no incorporation into Zn can be observed for such modified particles with diameters of <100 nm, while incorporation is possible for particles with diameters of 225 nm and larger. Furthermore, when silica particles are functionalized with mixtures of -SH and -Cl functional groups, which affect the interface energy at the particle/metal interface differently but have similar interfacial energies for the particle/electrolyte interface, it is found that, for successful incorporation of the particles, a minimum amount of -SH functional groups is needed. An explanation for these observations has been derived based on energetic considerations regarding the interfaces involved in the process.