Cobalt was electrodeposited onto chemical vapor deposition (CVD) graphene/Si/SiO2 substrates, during different time intervals, using an electrolyte solution containing a low concentration of cobalt sulfate. The intention was to investigate the details of the deposition process (and the dissolution process) and the resulting magnetic properties of the Co deposits on graphene. During and after electrodeposition, in-situ magnetic measurements were performed using an (AGFM). These were followed by ex situ morphological analysis of the samples with ΔtDEP 30 and 100 s by atomic force microscopy in the non-contact mode on pristine CVD graphene/SiO2/Si. We demonstrate that it is possible to electrodeposit Co onto graphene, and that in-situ magnetic measurements can also help in understanding details of the deposition process itself. The results show that the Co deposits are ferromagnetic with decreasing coercivity (HC) and demonstrate increasing magnetization on saturation (MSAT) and electric signal proportional to remanence (Mr), as a function of the amount of the electrodeposited Co. It was also found that, after the end of the dissolution process, a certain amount of cobalt remains on the graphene in oxide form (this was confirmed by X-ray photoelectron spectroscopy), as suggested by the magnetic measurements. This oxide tends to exhibit a limited asymptotic amount when cycling through the deposition/dissolution process for increasing deposition times, possibly indicating that the oxidation process is similar to the graphene surface chemistry.

The main purpose of this study is to introduce and examine a multidimensional model of almost all relevant social media characteristics and their impact on brand perception and brand behavior. In order to incorporate social media’s high complexity we introduce our concept of SMURF and its related outcomes. Therefore we follow the original idea of Muniz and O’Guinn (2001) that define a brand community as a customer-customer-brand triad. Furthermore, we suggest an extension of their model that includes four dimensions covering all SMURF of a social media brand presence (SMBP), namely (1) customer-brand relation, (2) customer-customer relation, (3) customer-community relation and (4) customer-channel relation. For our defined core constituents of brand perception as well as for the essential elements of brand behavior already existing and tested reflective measures were used. Regarding the multidimensional construct of SMURF, the measurement instrument by Wiedmann, et al. (2013) was used. In detail, any SMURF core element was captured with one global item. Furthermore, any reflective and formative measures were specified to those brand and Facebook fan page which has been tracked most frequently by the respondent. The first contribution is to provide a multidimensional framework of value-based drivers of SMURF with special focus on an overall brand presence context. Second, the findings contribute to explain the consequences of social media attractiveness such as unique relevance features which provide a great brand appeal. In this study, customers who are strongly attracted to a brand fan page experience a high positive brand perception as well as a high positive brand behavior. Third, the empirical findings of the applied PLS-SEM approach indicate that customers have a specific motivation of being attracted and connected to a brand in a social media context.

Cold spraying is a fairly new coating technique, which within the last decade attracted serious attention of research groups and spray companies. As compared to thermal spraying, the low process temperatures in cold spraying result in unique coating properties, which promise new applications. Since particles impact with high kinetic energy in the solid state, new concepts to describe coating formation are requested to enable the full potential of this new technology. The present contribution gives a brief review of current models concerning bonding, supplying a description of the most influential spray parameters and consequences for new developments. With respect to spray forming by cold cold spraying, microstructures and thick, further machineable structures are presented.