Electrical Transport — Emergence of Metallic Conductivity in Ordered One-Dimensional Coordination Polymer Thin Films upon Reductive Doping

Measurement evidence

Electrical Transport

Emergence of Metallic Conductivity in Ordered One-Dimensional Coordination Polymer Thin Films upon Reductive Doping · Nisula M., Karttunen A.J., Solano E. et al. · ACS Applied Materials and Interfaces · 2021 · 10249-10256

4 measurement groups · 10 results

Reported values remain attached to the sample, method, conditions, extraction quality and source location that produced them.

Conductivity monitoring under air exposure and O2 annealing

O2-treated Cu-DMD after H2 reduction · Electrode

H2-treated Cu-DMD exposed to ambient air; separately annealed in flowing O2 at 80-130 deg C and then exposed to air

Atmosphere
Ambient air; flowing O2
Geometry
IDA device
Context
H2-reduced doped Cu-DMD under post-treatment
Measurement source
p007 / SI p.6 · Supporting Information · Figure S9
PropertyReported valueNormalised valueUncertaintyOrigin and qualitySource
Maximum conductivity after short air exposureMarked as a best value within this paperup to 10^-2 S cm^-1up toText
Approximate
p004 / article p.10252 · Results and Discussion · Figure S9a
Conductivity after O2 annealing10^-9 S cm^-1Text
Rounded Reported
p005 / article p.10253 · Results and Discussion · Figure S9b

Two-terminal DC conductance/conductivity during H2 annealing

H2/He-reduced Cu-DMD film on interdigitated electrode array · Electrode

Autolab PGSTAT702 potentiostat; voltage sweep -0.5 to 0.5 V starting from 0 V; conductivity estimated from IDA geometry

Temperature
443
Atmosphere
Flowing 5% H2/He, 0.5 mL/min
Geometry
IDA, Au, 5 um electrode width, 5 um gap
Context
Cu-DMD film transitions from as-deposited low-conductivity state to H2-reduced doped high-conductance state
Measurement source
p003 / article p.10251 · Experimental Section · Figure 2a; Figure S7
PropertyReported valueNormalised valueUncertaintyOrigin and qualitySource
As-deposited room-temperature conductivity<10^-10 S cm^-1upper boundText
Range
p004 / article p.10252 · Results and Discussion · Figure S8
As-deposited transport regimeLinear log(sigma) versus T^-1/4, indicative of variable-range hopping-type conductionText
Qualitative
p004 / article p.10252 · Results and Discussion · Figure S8a,b
Overall conductivity increaseca. 8 orders of magnitudeca.Text
Approximate
p004 / article p.10252 · Results and Discussion · Figure S9a
Conductivity after H2 annealingaround 3 x 10^-3 S cm^-1aroundText
Approximate
p004 / article p.10252 · Results and Discussion · Figure 2a

Four-electrode I-V verification and impedance spectroscopy

H2/He-reduced Cu-DMD film on interdigitated electrode array · Electrode

Four-electrode geometry width 1 mm and spacing 0.6 mm; impedance Bode plots on IDA arrays in low and high conductivity states

Geometry
4-electrode test sample; IDA impedance sample
Context
As-deposited low-conductivity and H2-reduced high-conductivity Cu-DMD
Measurement source
p007 / SI p.6 · Supporting Information · Figure S10
PropertyReported valueNormalised valueUncertaintyOrigin and qualitySource
Four-electrode verification film thicknessFilm thickness is 19 nmCaption
Exact Reported
p007 / SI p.6 · Supporting Information · Figure S10
Low- and high-conductivity AC responseLow-conductivity state almost purely capacitive; high-conductivity state purely resistiveText
Qualitative
p005 / article p.10253 · Results and Discussion · Figure S10b,c

Temperature-dependent resistance in PPMS

H2/He-reduced Cu-DMD film on interdigitated electrode array · Electrode

Two-terminal current-biased configuration; excitation current 1 uA; high-conductance state only

Temperature
2-300
Atmosphere
Post-H2-treated sample; air-exposure stages also measured
Geometry
Two-terminal current-biased device
Context
H2-reduced doped Cu-DMD
Measurement source
p003 / article p.10251 · Experimental Section · Figure 2b; Figure S11
PropertyReported valueNormalised valueUncertaintyOrigin and qualitySource
Metallic behaviour temperature range2-300 KText
Range
p005 / article p.10253 · Results and Discussion · Figure 2b
Approximate high-conductance resistance rangeapproximately 60 Ohm at low temperature to 105 Ohm at 300 K from Figure 2bvisual estimate from axis; +/-5 OhmFigure Axis
Approximate
p004 / article p.10252 · Figure · Figure 2b