Electrical Transport — Macrocycle-Based Metal-Organic Frameworks with NO2-Driven On/Off Switch of Conductivity

Measurement evidence

Electrical Transport

Macrocycle-Based Metal-Organic Frameworks with NO2-Driven On/Off Switch of Conductivity · Ma Y.-X., Gao B., Li Y. et al. · ACS Applied Materials and Interfaces · 2021 · 27066-27073

3 measurement groups · 14 results

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

AC impedance conductivity

MOF A-covered screen-printed gold electrode sheet · Electrode

AC impedance measured before and after NO2 adsorption on a thin layer of MOF A.

Temperature
298
Atmosphere
before/after NO2 gas adsorption
Geometry
thin MOF A layer/electrode
Context
pristine and guest-loaded states compared
Measurement source
main p.4 · Results and Discussion · Figure S18 and Table S6
PropertyReported valueNormalised valueUncertaintyOrigin and qualitySource
MOF A conductivity after NO2 (main-text AC impedance calculation)Marked as a best value within this paperabout 8.4 × 10^-4 S/cm0.084 S/maboutText
Approximate
main p.4 · Results and Discussion · Figure S18
MOF A conductivity after NO2 (SI Table S6 summary)1.9×10^-3 S cm^-10.19 S/mSI Table
Rounded Reported
SI p.25 · Table S6 · Table S6
MOF A conductivity before NO2 (main-text AC impedance calculation)Marked as a best value within this paperabout 1.3 × 10^-11 S/cm1.3e-9 S/maboutText
Approximate
main p.4 · Results and Discussion · Figure S18
MOF A conductivity before NO2 (SI Table S6 summary)3.0×10^-12 S cm^-13e-10 S/mSI Table
Rounded Reported
SI p.25 · Table S6 · Table S6

Chronoamperometry-derived resistance switching

MOF A-covered screen-printed gold electrode sheet · Electrode

MOF A-covered gold electrode vacuumed; 0.5 V; NO2 flow introduced for 16 min then evacuated; three cycles measured.

Temperature
298
Atmosphere
NO2 flow then vacuum/evacuation
Geometry
MOF film on screen-printed gold electrode
Context
pristine MOF A film switching to NO2-loaded state
Measurement source
main pp.4 and 6 · Results and Discussion; Electrochemical Test of NO2 Adsorption · Figure 5
PropertyReported valueNormalised valueUncertaintyOrigin and qualitySource
Current after 2 min NO2 exposure2 µA within 2 min0.000002 AText
Rounded Reported
main p.4 · Results and Discussion · Figure 5
Initial current before NO2about 30 nA3e-8 AaboutText
Approximate
main p.4 · Results and Discussion · Figure 5
Maximum current under NO2Marked as a best value within this papermaximum 55 µA at saturation in 16 min0.000055 AText
Rounded Reported
main p.4 · Results and Discussion · Figure 5
Reversible cycling performance retainedMarked as a best value within this paper100% performance after three reversible cyclesText
Rounded Reported
main p.4 · Results and Discussion · Figure S16
Complete NO2 on/off cycle timeabout 18 min1080 saboutText
Approximate
main p.4 · Results and Discussion · Figure S16
Conductive-to-insulating recovery time after NO2 evacuationMarked as a best value within this paperabout 42 saboutText
Approximate
main p.4 · Results and Discussion · Figure 5
MOF A resistance after 2 min NO22.5 × 10^5 ΩText
Rounded Reported
main p.4 · Results and Discussion · Figure 5
MOF A resistance after NO2 saturationMarked as a best value within this paper9.1 × 10^3 ΩText
Rounded Reported
main p.4 · Results and Discussion · Figure 5
MOF A resistance before NO25.7 × 10^11 ΩText
Rounded Reported
main p.4 · Results and Discussion · Figure 5

Current-voltage (I-V) curves

MOF A-covered screen-printed gold electrode sheet · Electrode

MOF A and A-NO2 measured in Lake Shore TTPX Cryogenic Probe Station at 25 deg C and 1 bar.

Temperature
298
Atmosphere
1 bar
Geometry
probe station; film/device geometry not further specified
Context
MOF A vs A-NO2
Measurement source
SI p.1 and p.22 · Materials and methods; Figure S19 caption · Figure S19
PropertyReported valueNormalised valueUncertaintyOrigin and qualitySource
I-V conductance comparisonA-NO2 slope much higher than MOF AQualitative
Qualitative
SI p.22 · Figure S19 discussion · Figure S19