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Journal Article

Formation, thermal stability, and surface composition of size-selected AuFe nanoparticles

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Naitabdi, A., & Roldan Cuenya, B. (2007). Formation, thermal stability, and surface composition of size-selected AuFe nanoparticles. Applied Physics Letters, 91(11): 113110. doi:10.1063/1.2784957.

Cite as: https://hdl.handle.net/21.11116/0000-0006-DA58-2
The surface composition of isolated Au0.5Fe0.5 nanoparticles (NPs) synthesized by micelleencapsulation and supported on TiO2 (110) has been investigated. The study reveals thatphase-segregated structures are present after annealing at 300 ° C. A subsequent thermal treatmentat 700 ° C resulted in the formation of a AuFe alloy. At this temperature, a state characteristic of Fewas identified at the NPs’ surface. Annealing at 900 ° C resulted in the disappearance of the Fesurface state, which is attributed to Au segregation to the surface. The initial hexagonal NParrangement on the TiO2 (110) surface was preserved up to 900 ° C. At 1000 ° C, Au desorption wasobserved.