Thermal decomposition of surfactant coatings on Co and Ni nanocrystals

Pérez-Dieste, V.; Castellini, O.M.; Crain, J.N.; Eriksson, M.A.; Kirakosian, A.; Lin, J.-L.; McChesney, J.L.; Himpsel, F.J.; Black, C.T.; Murray, C.B.
December 2003
Applied Physics Letters;12/15/2003, Vol. 83 Issue 24, p5053
Academic Journal
The pathway for thermal decomposition of an oleic acid surfactant protecting Co and Ni nanocrystals is identified by probing the relevant molecular orbitals with x-ray absorption spectroscopy. The two steps observed previously in thermogravimetric measurements are identified with thermal desorption of entire molecules at ≈200 °C and dehydrogenation at ≈400 °C, which leaves a graphitic surface with alkane fragments underneath. © 2003 American Institute of Physics.


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