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Sunlight photocurrent generation from thylakoid membranes on gold nanoparticle modified screen-printed electrodes

Kanso, Hussein; Pankratova, Galina LU ; Bollella, Paolo; Leech, Dónal; Hernandez, David and Gorton, Lo LU (2018) In Journal of Electroanalytical Chemistry 816. p.259-264
Abstract

In this work we report on the increase in photocurrent obtained by using thylakoid membranes “wired” with an osmium redox polymer (OsRP) immobilized onto screen-printed carbon and gold electrodes (SPCEs and SPAuEs), modified with gold microparticles (AuMPs) and gold nanoparticles (AuNPs). Both AuMPs and AuNPs were electrodeposited by using the same electrodeposition method in order to study the influence of different electrode surface morphologies, namely AuMPs and AuNPs, on the photocurrent generated when illuminated ΔΔΔ with light with an intensity equivalent to that of sunlight (400 W m−2). AuMPs/SPCEs showed the highest current density (62.5 μA cm−2) upon illumination probably due to a higher capacitive current... (More)

In this work we report on the increase in photocurrent obtained by using thylakoid membranes “wired” with an osmium redox polymer (OsRP) immobilized onto screen-printed carbon and gold electrodes (SPCEs and SPAuEs), modified with gold microparticles (AuMPs) and gold nanoparticles (AuNPs). Both AuMPs and AuNPs were electrodeposited by using the same electrodeposition method in order to study the influence of different electrode surface morphologies, namely AuMPs and AuNPs, on the photocurrent generated when illuminated ΔΔΔ with light with an intensity equivalent to that of sunlight (400 W m−2). AuMPs/SPCEs showed the highest current density (62.5 μA cm−2) upon illumination probably due to a higher capacitive current directly related to the enhanced electroactive area (AEA) and roughness factor (ρ). Finally, the so modified electrodes AuMPs/SPCE and AuNPs/SPAuE were characterized by using scanning electron microscopy (SEM) showing a different surface morphology, resulting in a higher surface roughness for AuMPs/SPCE compared to AuNPs/SPAuE therefore an intimate interaction between the large thylakoid membrane and the AuNPs. A high photocurrent density of 62.5 μA cm−2 was generated at a light intensity of 400 W m−2.

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author
organization
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type
Contribution to journal
publication status
published
subject
keywords
Gold microparticles (AuMPs), Gold nanoparticles (AuNPs), Osmium redox polymer (ORP), Photocurrent, Thylakoid membranes
in
Journal of Electroanalytical Chemistry
volume
816
pages
259 - 264
publisher
Elsevier
external identifiers
  • scopus:85044305441
ISSN
1572-6657
DOI
10.1016/j.jelechem.2018.03.030
language
English
LU publication?
yes
id
6e83d6e3-01c9-48ec-a09c-005c58eb3d16
date added to LUP
2018-04-10 07:21:23
date last changed
2019-01-14 15:03:38
@article{6e83d6e3-01c9-48ec-a09c-005c58eb3d16,
  abstract     = {<p>In this work we report on the increase in photocurrent obtained by using thylakoid membranes “wired” with an osmium redox polymer (OsRP) immobilized onto screen-printed carbon and gold electrodes (SPCEs and SPAuEs), modified with gold microparticles (AuMPs) and gold nanoparticles (AuNPs). Both AuMPs and AuNPs were electrodeposited by using the same electrodeposition method in order to study the influence of different electrode surface morphologies, namely AuMPs and AuNPs, on the photocurrent generated when illuminated ΔΔΔ with light with an intensity equivalent to that of sunlight (400 W m<sup>−2</sup>). AuMPs/SPCEs showed the highest current density (62.5 μA cm<sup>−2</sup>) upon illumination probably due to a higher capacitive current directly related to the enhanced electroactive area (A<sub>EA</sub>) and roughness factor (ρ). Finally, the so modified electrodes AuMPs/SPCE and AuNPs/SPAuE were characterized by using scanning electron microscopy (SEM) showing a different surface morphology, resulting in a higher surface roughness for AuMPs/SPCE compared to AuNPs/SPAuE therefore an intimate interaction between the large thylakoid membrane and the AuNPs. A high photocurrent density of 62.5 μA cm<sup>−2</sup> was generated at a light intensity of 400 W m<sup>−2</sup>.</p>},
  author       = {Kanso, Hussein and Pankratova, Galina and Bollella, Paolo and Leech, Dónal and Hernandez, David and Gorton, Lo},
  issn         = {1572-6657},
  keyword      = {Gold microparticles (AuMPs),Gold nanoparticles (AuNPs),Osmium redox polymer (ORP),Photocurrent,Thylakoid membranes},
  language     = {eng},
  pages        = {259--264},
  publisher    = {Elsevier},
  series       = {Journal of Electroanalytical Chemistry},
  title        = {Sunlight photocurrent generation from thylakoid membranes on gold nanoparticle modified screen-printed electrodes},
  url          = {http://dx.doi.org/10.1016/j.jelechem.2018.03.030},
  volume       = {816},
  year         = {2018},
}