Morphology of gold nanoparticles determined by full-curve fitting of the light absorption spectrum. Comparison with X-ray scattering and electron microscopy data

作者：Slyusarenko Kostyantyn^*; Abecassis Benjamin; Davidson Patrick; Constantin Doru

来源：Nanoscale, 2014, 6(22): 13527-13534.

DOI：10.1039/c4nr04155k

UV-Vis absorption spectroscopy is frequently used to characterize the size and shape of gold nanopartides. We present a full-spectrum model that yields reliable results for the commonly encountered case of mixtures of spheres and rods in varying proportions. We determine the volume fractions of the two populations, the aspect ratio distribution of the nanorods (average value and variance) and the interface damping parameter. We validate the model by checking the fit results against small-angle X-ray scattering and transmission electron microscopy data and show that correctly accounting for the polydispersity in aspect ratio is essential for a quantitative description of the longitudinal plasmon peak.

• 出版日期2014-11