Geometric metrology of gold nanoparticle ensembles with optical extinction spectroscopy

摘要

We present a method based on optical extinction spectroscopy to fast characterize the geometric features (including size, aspect ratio, and geometric distribution) of gold nanosphere and nanorod ensembles. The results are compared with those obtained by transmission electron microscopy, showing the effectiveness of the method. The influence of the particle parameters is analyzed and the possible methods for solving the ill-posed inverse problem are discussed.