Sensing Application — Missing-Linker 2D Conductive Metal Organic Frameworks for Rapid Gas Detection

6 measurement groups · 33 results

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

RH calibration of Nafion-functionalized aNi-HAB devices

1% Nafion-modified aNi-HAB device · Electrode

Nafion mass fractions 0, 0.1, 0.5 and 1% compared for RH response.

Temperature: room temperature
Atmosphere: RH in carrier gas
Geometry: Nafion/aNi-HAB chemiresistor
Context: composite functionalized sensor compared with pristine aNi-HAB
Measurement source: 433 · Relative humidity detection · Figure 4b

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Optimal Nafion mass fractionMarked as a best value within this paper	1%	—	—	Text Exact Reported	433 · Relative humidity detection · Figure 4b
Nafion 0% RH calibration R2	R^2 = 0.93862	—	—	Figure Axis Exact Reported	433 · Figure 4 · Figure 4b
Nafion 0.1% RH calibration R2	R^2 = 0.97401	—	—	Figure Axis Exact Reported	433 · Figure 4 · Figure 4b
Nafion 0.5% RH calibration R2	R^2 = 0.95844	—	—	Figure Axis Exact Reported	433 · Figure 4 · Figure 4b
Nafion 1% RH calibration R2Marked as a best value within this paper	R^2 = 0.98518	—	—	Figure Axis Exact Reported	433 · Figure 4 · Figure 4b

Analyte selectivity response after Nafion functionalization

1% Nafion-modified aNi-HAB device · Electrode

Electrical response of pristine aNi-HAB and 1% Nafion-modified aNi-HAB to humidity, ethanol and acetone.

Temperature: room temperature
Atmosphere: H2O, ethanol, acetone vapours
Geometry: Nafion/aNi-HAB chemiresistor
Context: composite vs pristine
Measurement source: 433 · Relative humidity detection · Figure 4c

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Nafion water selectivity effectMarked as a best value within this paper	selectivity of water to organic vapors is significantly increased	—	—	Text Qualitative	433 · Relative humidity detection · Figure 4c

Repeated RH cycling test

aNi-HAB chemiresistive device · Electrode

20 cycles under 80% RH with dry-air recovery.

Temperature: room temperature
Atmosphere: dry air and 80% RH
Geometry: aNi-HAB chemiresistor
Context: pristine target
Measurement source: 432 · Relative humidity detection · Figure 2d

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
aNi-HAB cycling stability	20 cycles under 80% RH; excellent reversibility	—	—	Text Exact Reported	432 · Relative humidity detection · Figure 2d

Chemiresistive relative humidity sensing using Keysight 2902a SMU, bias 1 V

aNi-HAB chemiresistive device · Electrode

Pulses of RH generated by flowing dry N2 carrier through DI-water bubbler and mixing with dry N2; room temperature; RH 20-90%.

Temperature: room temperature
Atmosphere: dry N2/H2O vapour mixtures
Geometry: Si/Ti-Au chemiresistor, 1 V bias
Context: pristine target
Measurement source: 432 · Relative humidity detection · Figure 2; Table 1

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Missing-linker Ni-HAB RH detection rangeMarked as a best value within this paper	20-90% RH	—	—	Table Range	430 · Table 1 · Table 1
aNi-HAB RH calibration R2Marked as a best value within this paper	R^2 = 0.995	—	—	Figure Axis Exact Reported	431 · Figure 2 · Figure 2b
aNi-HAB first linear RH region	20-70% RH	—	—	Text Range	432 · Relative humidity detection · Figure 2b
Missing-linker Ni-HAB recovery timeMarked as a best value within this paper	1.63 s	—	—	Table Exact Reported	430 · Table 1 · Table 1
Typical aNi-HAB 80% RH recovery time	1.31 +/- 0.22 s	—	+/- 0.22 s	Text Exact Reported	432 · Relative humidity detection · Figure 2c
Missing-linker Ni-HAB response timeMarked as a best value within this paper	4.92 s	—	—	Table Exact Reported	430 · Table 1 · Table 1
Typical aNi-HAB 80% RH response time	5.43 +/- 1.28 s	—	+/- 1.28 s	Text Exact Reported	432 · Relative humidity detection · Figure 2c

Chemiresistive relative humidity sensing using same setup as aNi-HAB

cNi-HAB chemiresistive device · Electrode

cNi-HAB control device exposed to RH; SI Figure S5 covers 10-100% RH, Table 1 lists 60-100% effective range.

Temperature: room temperature
Atmosphere: dry air/N2 and H2O vapour mixtures
Geometry: Si/Ti-Au chemiresistor, 1 V bias
Context: crystalline pristine control
Measurement source: 9 · Figure S5 caption · Figure S5

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Crystal Ni-HAB RH detection range	60-100% RH	—	—	Table Range	430 · Table 1 · Table 1
cNi-HAB RH calibration R2	R^2 = 0.906	—	—	Figure Axis Exact Reported	431 · Figure 2 · Figure 2b
cNi-HAB low-RH response threshold	only responds at high relative humidity above 60%	—	—	Text Approximate	432 · Relative humidity detection · Figure 2b
Crystal Ni-HAB recovery time	2.26 s	—	—	Table Exact Reported	430 · Table 1 · Table 1
Crystal Ni-HAB response time	36.77 s	—	—	Table Exact Reported	430 · Table 1 · Table 1

Chemiresistive vapour/RH calibration for M-HAB series

aCu-HAB chemiresistive device · Electrode

Relative concentration calibration curves for H2O, ethanol and acetone vapours; Ni, Cu, Co and Fe analogues compared.

Temperature: room temperature
Atmosphere: dry N2/analyte vapour mixtures
Geometry: corresponding chemiresistive devices
Context: pristine missing-linker M-HAB analogues
Measurement source: 432-433 · Relative humidity detection · Figure 3

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
aCu-HAB overall response/selectivity	higher response to water, ethanol, and acetone than other MOFs; selectivity relatively poor	—	—	Text Qualitative	433 · Relative humidity detection · Figure 3b
aCo-HAB acetone response at 100% relative concentration	approximately 0.8 deltaI/I	—	—	Visual Estimate Approximate	432 · Figure 3 · Figure 3
aCo-HAB ethanol response at 100% relative concentration	approximately 2 deltaI/I	—	—	Visual Estimate Approximate	432 · Figure 3 · Figure 3
aCo-HAB H2O response at 60% relative concentration	approximately 3 deltaI/I	—	—	Visual Estimate Approximate	432 · Figure 3 · Figure 3
aCu-HAB acetone response at 100% relative concentration	approximately 9 deltaI/I	—	—	Visual Estimate Approximate	432 · Figure 3 · Figure 3
aCu-HAB ethanol response at 100% relative concentration	approximately 100 deltaI/I	—	—	Visual Estimate Approximate	432 · Figure 3 · Figure 3
aCu-HAB H2O response at 100% relative concentration	approximately 1000 deltaI/I	—	—	Visual Estimate Approximate	432 · Figure 3 · Figure 3
aFe-HAB acetone response at 100% relative concentration	approximately 3.3 deltaI/I	—	—	Visual Estimate Approximate	432 · Figure 3 · Figure 3
aFe-HAB ethanol response at 100% relative concentration	approximately 0.8 deltaI/I	—	—	Visual Estimate Approximate	432 · Figure 3 · Figure 3
aFe-HAB H2O response at 100% relative concentration	approximately 1.6 deltaI/I	—	—	Visual Estimate Approximate	432 · Figure 3 · Figure 3
aNi-HAB acetone response at 100% relative concentration	approximately 0.10 deltaI/I	—	—	Visual Estimate Approximate	432 · Figure 3 · Figure 3
aNi-HAB ethanol response at 100% relative concentration	approximately 1.3 deltaI/I	—	—	Visual Estimate Approximate	432 · Figure 3 · Figure 3
aNi-HAB H2O response near high RH	approximately 50 deltaI/I at about 70% relative concentration	—	—	Visual Estimate Approximate	432 · Figure 3 · Figure 3
aNi-HAB balance of sensitivity and selectivityMarked as a best value within this paper	best balance between sensitivity and selectivity	—	—	Text Qualitative	433 · Relative humidity detection · Figure 3