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Au-Pd Barcode Nanowires with Tailored Lattice Parameters and Segment Lengths for Catalytic Applications

Abbondanza, Giuseppe LU ; Grespi, Andrea LU ; Larsson, Alfred LU ; Hetherington, Crispin LU orcid ; Snelgrove, Matthew ; Carlá, Francesco ; Vinogradov, Nikolay LU orcid ; Felici, Roberto and Lundgren, Edvin LU (2024) In ACS Applied Nano Materials 7(4). p.3861-3872
Abstract

In this study, we present a systematic investigation of the controlled fabrication of Au-Pd barcode nanowires within nanoporous anodic aluminum oxide (NP-AAO) templates. By using a combination of in situ X-ray diffraction (XRD), focused ion beam scanning electron microscopy (FIB-SEM), and transmission electron microscopy (TEM), we elucidate the influence of template preparation methods on the resulting nanowire properties. The template treatment, involving either pore widening or barrier layer thinning, significantly impacts nanowire growth. Through the analysis of the XRD data, we observe sequential deposition of Au and Pd segments with lattice parameter variations and strain effects. Particularly, the lattice parameters of Au and Pd... (More)

In this study, we present a systematic investigation of the controlled fabrication of Au-Pd barcode nanowires within nanoporous anodic aluminum oxide (NP-AAO) templates. By using a combination of in situ X-ray diffraction (XRD), focused ion beam scanning electron microscopy (FIB-SEM), and transmission electron microscopy (TEM), we elucidate the influence of template preparation methods on the resulting nanowire properties. The template treatment, involving either pore widening or barrier layer thinning, significantly impacts nanowire growth. Through the analysis of the XRD data, we observe sequential deposition of Au and Pd segments with lattice parameter variations and strain effects. Particularly, the lattice parameters of Au and Pd segments display intricate temporal dependencies, influenced by interfacial effects and strain caused by growth under confinement. FIB-SEM imaging reveals uniform and reproducible nanowire lengths in the template treated with pore widening. Furthermore, TEM analysis confirms the presence of distinct Au and Pd segments, while scanning TEM-energy-dispersive X-ray spectroscopy revealed minor evidence of interdiffusion between the first and the second electrodeposited segments. Our findings emphasize the potential of the electrodeposition process within nanoporous templates for producing barcode nanowires with precise segmental properties. The combination of in situ XRD and electron microscopy offers valuable insights into the growth dynamics and structural characteristics of the fabricated Au-Pd barcode nanowires. This controlled fabrication strategy opens doors to tailoring nanowire properties for diverse applications, particularly in catalysis.

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author
; ; ; ; ; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
barcode, electrodeposition, gold, multisegmented, nanomaterials, palladium, synchrotron, X-ray diffraction
in
ACS Applied Nano Materials
volume
7
issue
4
pages
12 pages
publisher
The American Chemical Society (ACS)
external identifiers
  • scopus:85185256627
ISSN
2574-0970
DOI
10.1021/acsanm.3c05487
language
English
LU publication?
yes
id
7a08381e-acae-4557-9cff-4a6d28ddfe36
date added to LUP
2024-03-27 15:01:54
date last changed
2024-03-27 15:02:26
@article{7a08381e-acae-4557-9cff-4a6d28ddfe36,
  abstract     = {{<p>In this study, we present a systematic investigation of the controlled fabrication of Au-Pd barcode nanowires within nanoporous anodic aluminum oxide (NP-AAO) templates. By using a combination of in situ X-ray diffraction (XRD), focused ion beam scanning electron microscopy (FIB-SEM), and transmission electron microscopy (TEM), we elucidate the influence of template preparation methods on the resulting nanowire properties. The template treatment, involving either pore widening or barrier layer thinning, significantly impacts nanowire growth. Through the analysis of the XRD data, we observe sequential deposition of Au and Pd segments with lattice parameter variations and strain effects. Particularly, the lattice parameters of Au and Pd segments display intricate temporal dependencies, influenced by interfacial effects and strain caused by growth under confinement. FIB-SEM imaging reveals uniform and reproducible nanowire lengths in the template treated with pore widening. Furthermore, TEM analysis confirms the presence of distinct Au and Pd segments, while scanning TEM-energy-dispersive X-ray spectroscopy revealed minor evidence of interdiffusion between the first and the second electrodeposited segments. Our findings emphasize the potential of the electrodeposition process within nanoporous templates for producing barcode nanowires with precise segmental properties. The combination of in situ XRD and electron microscopy offers valuable insights into the growth dynamics and structural characteristics of the fabricated Au-Pd barcode nanowires. This controlled fabrication strategy opens doors to tailoring nanowire properties for diverse applications, particularly in catalysis.</p>}},
  author       = {{Abbondanza, Giuseppe and Grespi, Andrea and Larsson, Alfred and Hetherington, Crispin and Snelgrove, Matthew and Carlá, Francesco and Vinogradov, Nikolay and Felici, Roberto and Lundgren, Edvin}},
  issn         = {{2574-0970}},
  keywords     = {{barcode; electrodeposition; gold; multisegmented; nanomaterials; palladium; synchrotron; X-ray diffraction}},
  language     = {{eng}},
  number       = {{4}},
  pages        = {{3861--3872}},
  publisher    = {{The American Chemical Society (ACS)}},
  series       = {{ACS Applied Nano Materials}},
  title        = {{Au-Pd Barcode Nanowires with Tailored Lattice Parameters and Segment Lengths for Catalytic Applications}},
  url          = {{http://dx.doi.org/10.1021/acsanm.3c05487}},
  doi          = {{10.1021/acsanm.3c05487}},
  volume       = {{7}},
  year         = {{2024}},
}