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Laser-induced metastable mixed phase of AuNi nanoparticles: a coherent X-ray diffraction imaging study.

ABSTRACT: The laser annealing process for AuNi nanoparticles has been visualized using coherent X-ray diffraction imaging (CXDI). AuNi bimetallic alloy nanoparticles, originally phase separated due to the miscibility gap, transform to metastable mixed alloy particles with rounded surface as they are irradiated by laser pulses. A three-dimensional CXDI shows that the internal part of the AuNi particles is in the mixed phase with preferred compositions at ?29?at% of Au and ?90?at% of Au.

SUBMITTER: Kim Y 

PROVIDER: S-EPMC7206555 | biostudies-literature | 2020 May

REPOSITORIES: biostudies-literature

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Laser-induced metastable mixed phase of AuNi nanoparticles: a coherent X-ray diffraction imaging study.

Kim Yoonhee Y   Kim Chan C   Ahn Kangwoo K   Choi Jungwon J   Lee Su Yong SY   Kang Hyon Chol HC   Noh Do Young DY  

Journal of synchrotron radiation 20200331 Pt 3

The laser annealing process for AuNi nanoparticles has been visualized using coherent X-ray diffraction imaging (CXDI). AuNi bimetallic alloy nanoparticles, originally phase separated due to the miscibility gap, transform to metastable mixed alloy particles with rounded surface as they are irradiated by laser pulses. A three-dimensional CXDI shows that the internal part of the AuNi particles is in the mixed phase with preferred compositions at ∼29 at% of Au and ∼90 at% of Au. ...[more]

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