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Electron inelastic mean free path in water.
Yesibolati, Murat Nulati; Laganá, Simone; Kadkhodazadeh, Shima; Mikkelsen, Esben Kirk; Sun, Hongyu; Kasama, Takeshi; Hansen, Ole; Zaluzec, Nestor J; Mølhave, Kristian.
Afiliação
  • Yesibolati MN; DTU Nanolab, National Centre for Nano Fabrication and Characterization, Technical University of Denmark, Building 307, 2800 Kgs. Lyngby, Denmark. krmo@dtu.dk.
  • Laganá S; DTU Nanolab, National Centre for Nano Fabrication and Characterization, Technical University of Denmark, Building 307, 2800 Kgs. Lyngby, Denmark. krmo@dtu.dk.
  • Kadkhodazadeh S; DTU Nanolab, National Centre for Nano Fabrication and Characterization, Technical University of Denmark, Building 307, 2800 Kgs. Lyngby, Denmark. krmo@dtu.dk.
  • Mikkelsen EK; DTU Nanolab, National Centre for Nano Fabrication and Characterization, Technical University of Denmark, Building 307, 2800 Kgs. Lyngby, Denmark. krmo@dtu.dk.
  • Sun H; DTU Nanolab, National Centre for Nano Fabrication and Characterization, Technical University of Denmark, Building 307, 2800 Kgs. Lyngby, Denmark. krmo@dtu.dk.
  • Kasama T; DTU Nanolab, National Centre for Nano Fabrication and Characterization, Technical University of Denmark, Building 307, 2800 Kgs. Lyngby, Denmark. krmo@dtu.dk.
  • Hansen O; DTU Nanolab, National Centre for Nano Fabrication and Characterization, Technical University of Denmark, Building 307, 2800 Kgs. Lyngby, Denmark. krmo@dtu.dk.
  • Zaluzec NJ; Argonne National Laboratory, Photon Sciences Division, 9700 S. Cass Avenue, Argonne, IL 60439, USA.
  • Mølhave K; DTU Nanolab, National Centre for Nano Fabrication and Characterization, Technical University of Denmark, Building 307, 2800 Kgs. Lyngby, Denmark. krmo@dtu.dk.
Nanoscale ; 12(40): 20649-20657, 2020 Oct 22.
Article em En | MEDLINE | ID: mdl-32614016
Liquid phase transmission electron microscopy (LPTEM) is rapidly developing as a powerful tool for probing processes in liquid environments with close to atomic resolution. Knowledge of the water thickness is needed for reliable interpretation and modelling of analytical studies in LPTEM, and is particularly essential when using thin liquid layers, required for achieving the highest spatial resolutions. The log-ratio method in electron energy-loss spectroscopy (EELS) is often applied in TEM to quantify the sample thickness, which is measured relative to the inelastic mean free path (λIMFP). However, λIMFP itself is dependent on sample material, the electron energy, and the convergence and divergence angles of the microscope electronoptics. Here, we present a detailed quantitative analysis of the λIMFP of water as functions of the EELS collection angle (ß) at 120 keV and 300 keV in a novel nanochannel liquid cell. We observe good agreement with earlier studies conducted on ice, but find that the most widely used theoretical models significantly underestimate λIMFP of water. We determine an adjusted average energy-loss term Em, water, and characteristic scattering angle θE, water that improve the accuracy. The results provide a comprehensive knowledge of the λIMFP of water (or ice) for reliable interpretation and quantification of observations in LPTEM and cryo-TEM studies.

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Tipo de estudo: Prognostic_studies Idioma: En Revista: Nanoscale Ano de publicação: 2020 Tipo de documento: Article País de afiliação: Dinamarca País de publicação: Reino Unido

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Tipo de estudo: Prognostic_studies Idioma: En Revista: Nanoscale Ano de publicação: 2020 Tipo de documento: Article País de afiliação: Dinamarca País de publicação: Reino Unido