In situ coherent X-ray diffraction of isolated core–shell nanowires

Anomalous coherent X-ray diffraction in Bragg geometry is a promising technique to study three-dimensional composition and strain fields in nanostructures. This paper presents results of coherent X-ray diffraction experiments on single Ag/Au core–shell nanowires with a typical diameter of 100 to 300 nm in the as-prepared state and during in-situ heating. Experimental coherent diffraction patterns are compared with finite-element simulations. Moreover, experimental constraints owing to radiation damage are discussed.

► 3D diffraction patterns are collected at different energies from Ag/Au nanowires. ► Irreversible changes are observed during the in-situ heating experiment. ► The nanowires are deteriorated when measured in air. ► A C-layer forms when measuring under rough vacuum.