Transport-structure relationship in conductive polymers

Transport-structure relationship in conductive polymers Nicolas Massonnet, Alexandre Carella, Jean-Pierre Simonato, CEA-LITEN, Grenoble

20nm

30nm

Vertically-aligned CNT on Al for energy harvesting

Functionnalized graphene for on-chip biosensing

Nicolas Massonnet, Loïc Assaud, Brigitte Caussat, Hugues Vergne, LGC, Toulouse Nicolas Massonnet, Mathieu Pinault, Martine Mayne, CEA-IRAMIS, Saclay

Now working on CNT-based chemical sensors

Context : Improving PEDOT:PSS thermoelectric properties by substituing PSS with low hinderance counter-anions…

CVD graphene synthesis on Pt electrodes :

Diazonium grafting and PEDOT polymerization

Electrochemical on-chip detection

DirectCVDgrowthofCNTonAlforsupercapacitor

PEDOT:PSS

CF3SO3-

à PEDOT:OTf

SO42-

à PEDOT:Sulf

AFM on PEDOT:PSS (top) and PEDOT:Otf

(bottom)

XRD on PEDOT:PSS and

PEDOT:OTf

d = 3,4 Åd = 3,9 Åd = 7 Åd = 14 Å

Conductivity at low temperature shows changes in conduction mechanisms

Variable Range Hopping

Critical mode Metallic mode

XPS spectra of PEDOT:PSS and PEDOT:OTf

graphene

Diazonium reduction

EDOT polymerization

AAUA

SEM on the Pt electrodes

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Electrode Electrolyte Separator

TEM observations of NTC synthetized at different T

Low T aerosol CVD process

Supercapacitor

Samples after CNT growth

520 °C 550 °C 580 °C 610 °C

HR-TEM observation of low T NTC