Teitl: Quantitative measurement of the optical cross-sections of single nano-objects by correlative transmission and scattering micro-spectroscopy
Dyfyniad
Zilli A, Langbein WW, Borri P (2019). Quantitative measurement of the optical cross-sections of single nano-objects by correlative transmission and scattering micro-spectroscopy. Cardiff University. https://doi.org/10.17035/d.2018.0064868399
Hawliau Mynediad: Creative Commons Attribution 4.0 International
Dull Mynediad: I anfon cais i gael y data hwn, ebostiwch opendata@caerdydd.ac.uk
Manylion y Set Ddata
Cyhoeddwr: Cardiff University
Dyddiad (y flwyddyn) pryd y daeth y data ar gael i'r cyhoedd: 2019
Fformat y data: .jpg, .tif, .png, .txt, .mph, m, .opj
Meddalwedd ofynnol: mph files are Comsol models. m files are Matlab scripts. opj files are Origin projects.
Amcangyfrif o gyfanswm maint storio'r set ddata: Llai na 100 megabeit
Nifer y ffeiliau yn y set ddata: 92
DOI : 10.17035/d.2018.0064868399
DOI URL: http://doi.org/10.17035/d.2018.0064868399
This dataset, provided as a single zip archive, contains the raw data of the paper: "Quantitative measurement of the optical cross-sections of single nano-objects by correlative transmission and scattering micro-spectroscopy", ACS Photonics 2019 (DOI: 10.1021/acsphotonics.9b00727). In this work we reported a method to quantify the magnitude of the optical absorption and scattering cross-section of individual nano-objects. Such quantitative analysis can be applied to data obtained either with single-particle micro-spectroscopy or with automated analysis of widefield images. The analysis requires the correlation of transmission images obtained under brightfield illumination and scattering images obtained under darkfield illumination. The cross-section quantitation relies on the calculation of the angular distribution of the power scattered by the nano-object to the far-field, and its dependence on the direction of incidence. In this work, this calculation is performed based on an analytical model of the scattering process in the electrostatic limit, so that it is appropriate to describe nano-objects which are small with respect to the wavelength of the incident light. In this work, we also discuss an accurate approach to simulating numerically the optical cross-sections of nano-objects. In particular, we reproduce the conditions of microscopy experiments, including the presence of the substrate, incoherent illumination with a large angular range of incidence on the sample, and the finite collection of the objective lens in the far-field. Comparison of the quantitative cross-section measurements with these accurate simulations can provide an estimate of unknown parameters of the system (e.g. a geometric dimension of the nano-object) by using them as fit parameters to match simulation and experiment. We call optical sizing such analysis procedure, whereby some geometrical parameter of a nano-object is assessed with purely optical measurements. We demonstrated this thorough optical characterization on three widely studies types of nanoparticles: Gold spheres of 60 nm diameter, gold rods of 28 nm width and 2.3 aspect ratio, and polystyrene spheres of 100 nm diameter. This dataset, along with the methodology reported in the above cited paper and its Supporting information, includes all the necessary materials and instructions for other to check the accuracy of our measurement and implement the quantitative method with their own set-up. Specifically, we include: The HTML document named "Data_Description" in the base folder of the archive contains a description of each item of the dataset and its path in the folder tree. It also includes two "Figure key" sections which allow to retrieve the data corresponding to a specific figure in the article cited above or its Supporting information.
Disgrifiad
Allweddeiriau
Darkfield micro-spectroscopy, Nanoparticles, Nanoplasmonics, Optical cross-sections, Particle sizing, Rayleigh scattering, Single-particle microscopy, UV-Vis absorption spectra
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