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Large scale inkjet-printing of carbon nanotubes
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electrodes for antioxidant assays in blood bags
- Electronic supporting information -
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Andreas Lesch,a Fernando Cortés-Salazar,a Michel Prudent,b Julien Delobel,b Shokoufeh
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Rastgar,c Niels Lion,b Jean-Daniel Tissot,b Philippe Tacchinid and Hubert H. Giraulta,*
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a
Ecole Polytechnique Fédérale de Lausanne, Laboratoire d’Electrochimie Physique et
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Analytique, Station 6, CH-1015 Lausanne, Switzerland
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b
Service Régional Vaudois de Transfusion Sanguine, Unité de Recherche et Développement,
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CH-1066 Epalinges, Switzerland
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c
Department of Chemistry, Sharif University of Technology, Tehran 11155-9516, Iran.
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d
Edel for Life, PSE-B/EPFL, CH-1015 Lausanne, Switzerland
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*
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EMAIL:
[email protected]
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Telephone number:
+41 (0)21 693 31 51
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Fax number:
+41 (0)21 693 36 67
CORRESPONDING AUTHOR FOOTNOTE
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SI-1 Laser scanning microscopy and scanning electron microscopy of the
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inkjet-printed carbon nanotubes electrodes
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Figure SI-1. a) Laser scanning micrograph of a 4-IJPL CNT pattern on polyimide (PI). b) Scanning electron
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micrograph of a 4-IJPL CNT pattern on Ag and PI substrate.
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SI-2 Cyclic voltammetry of the inkjet-printed carbon nanotubes electrodes
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Figure SI-2. Cyclic voltammetries (CVs, first cycle) in 2 mM FcMeOH using one 1-IJPL CNT sensor (a) and one 4-
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IJPL CNT sensor (b). Various scan rates ν in mV·s-1: 10, 25, 50, 100, 250, 500, 1000.
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Figure SI-3. Baseline-corrected anodic peak current Ipa vs. the square root of the scan rate (ν1/2) for 1-IJPL, 2-IJPL
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and 4-IJPL CNT sensors. Electrolyte solution: 2 mM FcMeOH in 0.1 M KCl.
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SI-3 Randles-Sevcik equation
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The Randles-Sevcik equation is as follows,
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1
2
1
1
æ F ö 23
2 * 2
ipa = 0.4463 ç
n
A
D
c
v
m
÷
è RT ø
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The Randles-Sevcik equation at room temperature can be written as:
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ipa = 2.69 ´10 n Am D c v
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Am – microscopic electrode area (cm2)
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ipa – anodic peak current in (A)
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n – number of transferred electrons
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D – diffusion coefficient of the redox mediator (cm2·s-1)
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ν – scan rate (V·s-1)
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c* – concentration of the redox mediator in bulk solution (mol·cm-3)
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3
2
1
1
2 * 2
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SI-4 Variation of λ and Ethreshold in the pseudo-titration voltammetry
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Figure SI-4. Effect of adjusting λ and Ethreshold in the pseudo-titration process.
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