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Electrochemical Fabrication and Characterization of Palladium Nanowires in Nanoporous Alumina Templates

Larsson, Alfred LU ; Abbondanza, Giuseppe LU ; Linpe, Weronica LU ; Carla, Francesco ; Mousley, Philip ; Hetherington, Crispin LU ; Lundgren, Edvin LU and Harlow, Gary S LU (2020) In Journal of the Electrochemical Society 167(12).
Abstract
A method for the electrochemical synthesis of palladium nanowires, using porous alumina templates with diameters of 25 nm and 40 nm, is presented. Through an electrochemical barrier layer thinning step, pulsed electrodeposition can take place directly into the anodized aluminum; without need for extra removal, pore opening, and metal contact coating steps. A digital oscilloscope is used to record and integrate the current, allowing the efficiency of the electrodeposition to be calculated. We discuss how using a large 'off period' allows for the replenishment of the depleted diffusion layer. The nanowires are characterized by using a focused ion beam (FIB) to create cross-sections which can be accessed with a scanning electron microscope... (More)
A method for the electrochemical synthesis of palladium nanowires, using porous alumina templates with diameters of 25 nm and 40 nm, is presented. Through an electrochemical barrier layer thinning step, pulsed electrodeposition can take place directly into the anodized aluminum; without need for extra removal, pore opening, and metal contact coating steps. A digital oscilloscope is used to record and integrate the current, allowing the efficiency of the electrodeposition to be calculated. We discuss how using a large 'off period' allows for the replenishment of the depleted diffusion layer. The nanowires are characterized by using a focused ion beam (FIB) to create cross-sections which can be accessed with a scanning electron microscope (SEM). With grazing-incidence X-ray diffraction (GI-XRD) we find that the nanowires have a slight compressive strain in the direction that they are confined by the pores (0.58 % and 0.51 % for the 25 nm and 40 nm pores respectively). Knowing the strain state of the nanowires inside the template is of importance for the use of templated nanowires in devices. Further characterization is made using high-resolution transmission electron microscopy (HR-TEM) and energy dispersive X-ray spectroscopy (EDS), after removal from the alumina templates. (Less)
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author
; ; ; ; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Electrodeposition, Nanoporous alumina oxide, XRD
in
Journal of the Electrochemical Society
volume
167
issue
12
article number
122514
publisher
Electrochemical Society
external identifiers
  • scopus:85091623102
ISSN
0013-4651
DOI
10.1149/1945-7111/abb37e
language
English
LU publication?
yes
id
b2ed3377-4e89-48ee-b8c8-1e57d5463507
date added to LUP
2020-08-30 16:18:21
date last changed
2020-11-12 15:20:51
@article{b2ed3377-4e89-48ee-b8c8-1e57d5463507,
  abstract     = {A method for the electrochemical synthesis of palladium nanowires, using porous alumina templates with diameters of 25 nm and 40 nm, is presented. Through an electrochemical barrier layer thinning step, pulsed electrodeposition can take place directly into the anodized aluminum; without need for extra removal, pore opening, and metal contact coating steps. A digital oscilloscope is used to record and integrate the current, allowing the efficiency of the electrodeposition to be calculated. We discuss how using a large 'off period' allows for the replenishment of the depleted diffusion layer. The nanowires are characterized by using a focused ion beam (FIB) to create cross-sections which can be accessed with a scanning electron microscope (SEM). With grazing-incidence X-ray diffraction (GI-XRD) we find that the nanowires have a slight compressive strain in the direction that they are confined by the pores (0.58 % and 0.51 % for the 25 nm and 40 nm pores respectively). Knowing the strain state of the nanowires inside the template is of importance for the use of templated nanowires in devices. Further characterization is made using high-resolution transmission electron microscopy (HR-TEM) and energy dispersive X-ray spectroscopy (EDS), after removal from the alumina templates.},
  author       = {Larsson, Alfred and Abbondanza, Giuseppe and Linpe, Weronica and Carla, Francesco and Mousley, Philip and Hetherington, Crispin and Lundgren, Edvin and Harlow, Gary S},
  issn         = {0013-4651},
  language     = {eng},
  month        = {08},
  number       = {12},
  publisher    = {Electrochemical Society},
  series       = {Journal of the Electrochemical Society},
  title        = {Electrochemical Fabrication and Characterization of Palladium Nanowires in Nanoporous Alumina Templates},
  url          = {http://dx.doi.org/10.1149/1945-7111/abb37e},
  doi          = {10.1149/1945-7111/abb37e},
  volume       = {167},
  year         = {2020},
}