Seeing structures and measuring properties with transmission electron microscopy images: A simple combination to study size effects in nanoparticle systems

Donnadieu, P.; Lazar, S.; Botton, Gianluigi A.; Pignot-Paintrand, Isabelle; Reynolds, Michael; Pérez, Serge

doi:10.1063/1.3168525

Cited by 20 publications

(16 citation statements)

References 17 publications

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“…Formulation (see Figure 30a) revealed that Au growth on TiO 2 and on Pt(100) substrates proceeds in a layer-by-layer fashion. 286,287 The size-induced deepening of the inner muffin-tin potential of gold NPs in Figure 30b 299 follows the same size trend.…”

Section: 65supporting

confidence: 50%

Coordination-Resolved Electron Spectrometrics

et al. 2015

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Section: 65supporting

confidence: 50%

Coordination-Resolved Electron Spectrometrics

et al. 2015

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“…The TIE does not require any special microscope attachments or a vacuum region, and is thus considered to have a wider scope for applications compared to EH. The TIE has been used to determine the mean inner potential (MIP) of metallic nanoparticles [14][15][16], and it was found that the MIP increases as the particle diameter decreases to a few nanometers. Petersen et al…”

Section: / 24mentioning

confidence: 99%

Practical procedure for retrieval of quantitative phase map for two-phase interface using the transport of intensity equation

Zhang

Oshima

2015

Ultramicroscopy

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A practical procedure for retrieving quantitative phase distribution at the interface between a thin amorphous germanium (a-Ge) film and vacuum based on the transport of intensity equation is proposed. First, small regions were selected in transmission electron microscopy (TEM) images with three different focus settings in order to avoid phase modulation due to low frequency noise. Second, the selected TEM image and its three reflected images were combined for mirror-symmetry to meet the boundary requirements. However, in this symmetrization, extra phase modulation arose due to the discontinuous nature of Fresnel fringes at the boundaries among the four parts of the combined image. Third, a corrected phase map was obtained by subtracting a linear fit to the extra phase modulation. The phase shift for a thin a-Ge film was determined to be approximately 0.5 rad, indicating that the average inner potential was 18.3 V. The validity of the present phase retrieval is discussed using simple simulations.

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“…The quantum entrapment has been evidenced by the Au 4f core-level shift amounted at 40% from 2.86 to 4.0 eV with respect to the energy level of an isolated atom at 81.50 eV. 12,18 The valence charges of gold particles are polarized by the densely trapped and tightly trapped core charge due to the deepened potential. Bulk gold is known to be the noblest of all metals: unlike other transition metals of which the 5d band locates close to Fermi level (E F ), the Au 5d orbitals were fully occupied deeply under E F .…”

Section: -2mentioning

confidence: 99%