Structural Properties of Nanometer‐Sized Gold Nanoparticles on a Silicon Substrate

Pussi, Katariina; Barbiellini, B.; Ohara, Koji; Yamada, Hiroki; Carbó‐Argibay, Enrique; Sousa, Viviana; Kolen’ko, Yury V.; Bansil, Arun; Kamali, Saeed

doi:10.1002/pssb.202100572

Cited by 3 publications

(2 citation statements)

References 68 publications

(82 reference statements)

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“…DFT calculations [43] show that an oxygen diatomic molecule interacts with the (001) surface of cobalt ferrite on top of an exposed octahedrally coordinated metal ion. Since our model cluster does not include the oxygen diatomic molecule, this surface effect must be added as has been done previously in gold nanoparticles [44]. The peak around 1.20 Å is the largest for x = 0.5 (red line).…”

Section: Reverse Monte Carlo Analysis and Resultsmentioning

confidence: 99%

“…In any event, our experiments suggest that Mn doping of x = 0.5 provides favorable conditions for O 2 diatomic molecules to stick to the surfaces of cobalt ferrite nanoparticles. The observed area of the peak related to the oxygen molecule can be explained in terms of the high surface-to-volume ratio [44], which results in many exposed octahedrally coordinated metal ions that can bind to oxygen molecules. We have verified that the oxygen molecule signal is a real feature and not an artifact of data processing by modifying the upper limit of the Fourier transform used in obtaining PDFs from the XRDs.…”

Section: Reverse Monte Carlo Analysis and Resultsmentioning

confidence: 99%

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Atomic Structure of Mn-Doped CoFe2O4 Nanoparticles for Metal–Air Battery Applications

et al. 2023

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We discuss the atomic structure of cobalt ferrite nanoparticles doped with Mn via an analysis based on combining atomic pair distribution functions with high energy X-ray diffraction and high-resolution transmission electron microscopy measurements. Cobalt ferrite nanoparticles are promising materials for metal–air battery applications. Cobalt ferrites, however, generally show poor electronic conductivity at ambient temperatures, which limits their bifunctional catalytic performance in oxygen electrocatalysis. Our study reveals how the introduction of Mn ions promotes the conductivity of the cobalt ferrite electrode.

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Section: Reverse Monte Carlo Analysis and Resultsmentioning

confidence: 99%

Section: Reverse Monte Carlo Analysis and Resultsmentioning

confidence: 99%

Atomic Structure of Mn-Doped CoFe2O4 Nanoparticles for Metal–Air Battery Applications

et al. 2023

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Atomic structure of an FeCrMoCBY metallic glass revealed by high energy x-ray diffraction

Pussi¹,

Nokelainen²,

Louzguine‐Luzgin³

et al. 2022

J. Phys.: Condens. Matter

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Amorphous bulk metallic glasses with the composition Fe48Cr15Mo14C15B6Y2 have been of interest due to their special mechanical and electronic properties, including corrosion resistance, high yield-strength, large elasticity, catalytic performance, and soft ferromagnetism. Here, we apply a reverse Monte Carlo technique to unravel the atomic structure of these glasses. The pair-distribution functions for various atomic pairs are computed based on the high-energy x-ray diffraction data we have taken from an amorphous sample. Monte Carlo cycles are used to move the atomic positions until the model reproduces the experimental pair-distribution function. The resulting fitted model is consistent with our ab-initio simulations of the metallic glass. Our study contributes to the understanding of functional properties of Fe-based bulk metallic glasses driven by disorder effects.

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Preparation and Characterization of 1D, 2D, and 3D Shapes of Anisotropic Gold Nanoparticles

Trong Phat Huynh,

Hoang Trung Huynh,

Duc Trung Vu

et al. 2024

JTE

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In recent times, the scientific community has become interested in gold nanoparticles, namely in the anisotropic class. Based on their shapes, they fall into three categories: one-, two-, and three-dimensional. The synthesis and properties of three different anisotropic gold nanoparticle preparations - gold nanobipyramids (one-dimension, 1D), gold nanoprisms (two-dimension, 2D), and gold stars (three-dimension, 3D) - are shown in this research. Here, our group describes a chemical reduction method mediated by seeds. X-ray powder diffraction, transmission electron microscopy, scanning electron microscopy, and ultraviolet-visible spectroscopy were used to analyze the anisotropic gold nanoparticles. The average dimensions of the nanobipyramids were 64.27 ± 7.31 nm for length and 25.87 ± 2.56 nm for diameter, according to the data; the average dimensions of the gold nanoprisms and goldstars were 43.54 ± 5.61 nm and 31.35 ± 7.01 nm, respectively. Furthermore, following centrifugation purification, the yields of triangle and bipyramidal particles rose from 40% to over 60% and from 60% to 90%, respectively. It was established what the ideal parameter concentration was to create anisotropic gold nanoparticles in three dimensions: one, two, and three.

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Structural Properties of Nanometer‐Sized Gold Nanoparticles on a Silicon Substrate

Cited by 3 publications

References 68 publications

Atomic Structure of Mn-Doped CoFe2O4 Nanoparticles for Metal–Air Battery Applications

Atomic Structure of Mn-Doped CoFe2O4 Nanoparticles for Metal–Air Battery Applications

Atomic structure of an FeCrMoCBY metallic glass revealed by high energy x-ray diffraction

Preparation and Characterization of 1D, 2D, and 3D Shapes of Anisotropic Gold Nanoparticles

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