Revealing Three-Dimensional Morphology in Nanoporous Gold Using Three-Dimensional X-Ray Fresnel Coherent Diffractive Imaging Tomography
(2020) In Journal of Electrochemical Energy Conversion and Storage 17(4).- Abstract
Nanoporous metals fabricated by dealloying have a unique bi-continuous, sponge-like porous structure with ultra-high surface area. The unique properties of these materials, especially nanoporous gold, have numerous potential applications in sensors and actuators and in energy-related applications such as catalytic materials, super-capacitors, and battery supports. The degree of porosity and size of the metal ligaments are critical parameters that determine many properties and thus govern the functionalities of nanoporous metals in many applications including energy storage and conversion. We used Fresnel coherent diffractive imaging combined with tomographic reconstruction to quantify the nanoscale three-dimensional spatial distribution... (More)
Nanoporous metals fabricated by dealloying have a unique bi-continuous, sponge-like porous structure with ultra-high surface area. The unique properties of these materials, especially nanoporous gold, have numerous potential applications in sensors and actuators and in energy-related applications such as catalytic materials, super-capacitors, and battery supports. The degree of porosity and size of the metal ligaments are critical parameters that determine many properties and thus govern the functionalities of nanoporous metals in many applications including energy storage and conversion. We used Fresnel coherent diffractive imaging combined with tomographic reconstruction to quantify the nanoscale three-dimensional spatial distribution and homogeneity of the porosity and ligament size within a bulk sample of nanoporous gold. The average porosity and its standard deviation along the axial direction through the sample were determined, as well as the characteristic feature size and its standard deviation. The result shows that free corrosion is an effective way to create homogeneous nanoporous metals with sample sizes on the order of 1 µm.
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- author
- Karen, Yu Chen ; Wiegart, Chen ; Kim, Sang Soo ; Vine, David ; Xiao, Xianghui ; Zhao, Chonghang ; Pfeifer, Mark A. ; Williams, Garth J. and McNulty, Ian LU
- organization
- publishing date
- 2020-11
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- Dealloying, FCDI, Nanoporous metal, NPG, Tomography
- in
- Journal of Electrochemical Energy Conversion and Storage
- volume
- 17
- issue
- 4
- article number
- 041005
- publisher
- American Society Of Mechanical Engineers (ASME)
- external identifiers
-
- scopus:85126808462
- ISSN
- 2381-6872
- DOI
- 10.1115/1.4046414
- language
- English
- LU publication?
- yes
- id
- 650eae1d-4c53-4939-9b2e-6b00f6a49429
- date added to LUP
- 2022-05-02 14:46:06
- date last changed
- 2022-05-02 14:46:06
@article{650eae1d-4c53-4939-9b2e-6b00f6a49429,
abstract = {{<p>Nanoporous metals fabricated by dealloying have a unique bi-continuous, sponge-like porous structure with ultra-high surface area. The unique properties of these materials, especially nanoporous gold, have numerous potential applications in sensors and actuators and in energy-related applications such as catalytic materials, super-capacitors, and battery supports. The degree of porosity and size of the metal ligaments are critical parameters that determine many properties and thus govern the functionalities of nanoporous metals in many applications including energy storage and conversion. We used Fresnel coherent diffractive imaging combined with tomographic reconstruction to quantify the nanoscale three-dimensional spatial distribution and homogeneity of the porosity and ligament size within a bulk sample of nanoporous gold. The average porosity and its standard deviation along the axial direction through the sample were determined, as well as the characteristic feature size and its standard deviation. The result shows that free corrosion is an effective way to create homogeneous nanoporous metals with sample sizes on the order of 1 µm.</p>}},
author = {{Karen, Yu Chen and Wiegart, Chen and Kim, Sang Soo and Vine, David and Xiao, Xianghui and Zhao, Chonghang and Pfeifer, Mark A. and Williams, Garth J. and McNulty, Ian}},
issn = {{2381-6872}},
keywords = {{Dealloying; FCDI; Nanoporous metal; NPG; Tomography}},
language = {{eng}},
number = {{4}},
publisher = {{American Society Of Mechanical Engineers (ASME)}},
series = {{Journal of Electrochemical Energy Conversion and Storage}},
title = {{Revealing Three-Dimensional Morphology in Nanoporous Gold Using Three-Dimensional X-Ray Fresnel Coherent Diffractive Imaging Tomography}},
url = {{http://dx.doi.org/10.1115/1.4046414}},
doi = {{10.1115/1.4046414}},
volume = {{17}},
year = {{2020}},
}