Quantitatively linking morphology and optical response of individual silver nanohedra - data

This dataset, provided as a single zip archive, contains data related to the article: "Quantitatively linking morphology and optical response of individual silver nanohedra", Nanoscale 2022 (DOI: 10.1039/D2NR02131E). This work reports (i) a sample preparation methodology which allows correlating transmission electron microscopy (TEM) and optical micro-spectroscopy performed on a single nano-object; and (ii) an analysis method, applicable to a broad range of nano-systems, for analysing the spectroscopic data in order to accurately quantify the optical scattering and absorption cross section magnitude. (i) and (ii) are jointly demonstrated on silver nanohedra particles. By comparing the measured cross sections to numerical simulations based on the geometry determined via TEM tomography for each particle, we assess on one hand the accuracy of the cross section measurements, and on the other hand how adequately the model describes the system. By systematically investigating various tomography reconstruction algorithms which influence the geometry, and varying material parameters of the system, we find out that assuming a thin (~0.3-1nm) tarnish layer has formed on the particle surface brings about a good agreement between simulation and experiment.

This dataset complements the article cited above and the associated supplementary information. It is meant to facilitate other researchers to thoroughly assess our work; and to help them performing quantitative cross section measurements on their own optical microscope with the methodology we propose. Specifically, we include in the data set:

• Data represented in the figures of the article and its Supporting information.
• TEM-tomography data and the particle geometry modes created from the data. 3D animations of the particles
  
• The raw experimental spectroscopic data, and the cross-section spectra obtained via the quantitative analysis.
• The numerical models we used to compute the optical scattering and absorption spectra of the silver particles.
• The scripts we used to automate the large parametric sweeps required to accurately simulate the cross sections under microscope illumination, and to perform the quantitative analysis.
  

The base folder of the archive contains a HTML document called “Data_Description" which includes a brief description of each item of the dataset and its path in the folder tree. It also includes two "Figure key" section pointing to the data corresponding to figures of the article and supplementary information.