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Article Dans Une Revue Chemistry of Materials Année : 2018

Size and Concentration Determination of Colloidal Nanocrystals by Small-Angle X-ray Scattering

Jorick Maes
  • Fonction : Auteur
Nicolo Castro
  • Fonction : Auteur
Kim de Nolf
  • Fonction : Auteur
Willem Walravens
Zeger Hens

Résumé

The accurate determination of the dimensions of a nano-object is paramount to the development of nanoscience and technology. Here, we provide procedures for sizing quasi-spherical colloidal nanocrystals (NCs) by means of small-angle x-ray scattering (SAXS). Using PbS NCs as a model system, the protocols outline the extraction of the net NC SAXS pattern by background correction and address the calibration of scattered x-ray intensity to an absolute scale. Different data analysis methods are compared, and we show that they yield nearly identical estimates of the NC diameter in the case of a NC ensemble with a monodisperse and monomodal size distribution. Extending the analysis to PbSe, CdSe and CdS NCs, we provide SAXS calibrated sizing curves, which relate the NC diameter and the NC band-gap energy as determined using absorbance spectroscopy. In comparison with sizing curves calibrated by means of transmission electron microscopy (TEM), we 1
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Dates et versions

hal-02089232 , version 1 (09-11-2020)

Identifiants

Citer

Jorick Maes, Nicolo Castro, Kim de Nolf, Willem Walravens, Benjamin Abécassis, et al.. Size and Concentration Determination of Colloidal Nanocrystals by Small-Angle X-ray Scattering. Chemistry of Materials, 2018, 30 (12), pp.3952-3962. ⟨10.1021/acs.chemmater.8b00903⟩. ⟨hal-02089232⟩
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