The Au102(pMBA)44 nanocluster becomes a superatom paramagnet after chemical oxidation. Solutions of paramagnetic Au102(pMBA)44 heat in an oscillating magnetic field component of an RF field, but not in the electric component. Combined, these experiments suggest that paramagnetic Au102(pMBA)44 heats through interactions of spin magnetic moment with an external oscillating magnetic field. These results may clarify some current controversy regarding gold nanoparticle heating in radiofrequency fields.
The complexes [Co 3 (CO) 9 CCl], [Co 3 (CO) 9 CH], [Co 2 (CO) 6 (HCtCPh)] and [Co 2 (CO) 6 (HCtC t -Bu)] are shown to be excellent precursors for CVD of pure cobalt films, when using hydrogen as carrier gas. These compounds all possess good air and moisture stability, have high volatility, and are easy to prepare, store, and handle. Using these precursors and the known palladium and platinum precursors [Pd(hfac) 2 ] and [PtMe 2 (COD)], it has been shown that bilayer films glass/Co/Pd, glass/Pd/Co, glass/Co/Pt, and glass/Pt/Co can be grown easily. There is a sharp boundary and good adhesion between the two metal layers, suggesting that this method may be suitable for the formation of bilayer films for magnetooptical applications.
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