Sensing Application — Layer-by-Layer Assembled Conductive Metal–Organic Framework Nanofilms for Room-Temperature Chemiresistive Sensing

6 measurement groups · 26 results

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

Cu3(HHTP)2-10C thin-film chemiresistor · Electrode

Cu3(HHTP)2-10C exposed to 100 ppm typical reducing gases including NH3 and 10 interferents.

Temperature: room temperature
Atmosphere: Dry air with reducing gas analytes.
Geometry: Au interdigitated electrode chemiresistor.
Context: Pristine Cu3(HHTP)2-10C thin-film sensor.
Measurement source: main p.3, article p.16512 · Cross-sensitivity discussion · Figure 3d

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Response range toward acetone and ethanol	between 30 % and 40 %	—	range upper bound 40 %	Text Range	main p.3, article p.16512 · Cross-sensitivity discussion · Figure 3d
Response upper bound toward most interfering gases	lower than 20 %	—	upper bound	Text Range	main p.3, article p.16512 · Cross-sensitivity discussion · Figure 3d
NH3 selectivity factor lower bound	4.55 to 8.25	—	range	Text Range	main p.3, article p.16512 · Cross-sensitivity discussion · Figure 3d
NH3 selectivity factor upper bound	4.55 to 8.25	—	range	Text Range	main p.3, article p.16512 · Cross-sensitivity discussion · Figure 3d

Cu3(HHTP)2-10C thin-film chemiresistor · Electrode

Cu3(HHTP)2-10C exposed to NH3 from 1 to 100 ppm in dry synthetic air; response defined as Rgas/Rair - 1 for resistance increase.

Temperature: room temperature
Atmosphere: Dry synthetic air with NH3.
Geometry: Au interdigitated electrode chemiresistor.
Context: Pristine Cu3(HHTP)2-10C thin-film sensor.
Measurement source: main p.2-p.3, article p.16511-p.16512 · Gas-sensing performance · Figure 3a-c

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Log-log response exponent beta	0.472	—	—	Text Exact Reported	main p.3, article p.16512 · Response-concentration analysis · Figure 3b
Theoretical limit of detection for NH3Marked as a best value within this paper	about 0.5 ppm	—	—	Text Approximate	main p.3, article p.16512 · Response-concentration analysis · Figure 3b
NH3 detection concentration range	1 to 100 ppm	—	range upper bound 100 ppm	Text Range	main p.2, article p.16511 · Gas-sensing performance · Figure 3a
Semiconductor sensing polarity	p-type semiconductor behaviour; resistance increases on NH3 exposure	—	—	Qualitative Qualitative	main p.2-p.3, article p.16511-p.16512 · Gas-sensing performance and mechanism · Figure 3a
Recovery time after 100 ppm NH3Marked as a best value within this paper	9.11 min	—	—	Text Exact Reported	main p.3, article p.16512 · Response-recovery time · Figure 3c
Coefficient of variation for repeated 100 ppm NH3 response	1.54 %	—	—	Text Exact Reported	main p.2, article p.16511 · Gas-sensing performance · Figure 3a
Response to 100 ppm NH3Marked as a best value within this paper	129 %	—	—	Text Rounded Reported	main p.2-p.3, article p.16511-p.16512 · Gas-sensing performance · Figure 3a
Response time to 100 ppm NH3Marked as a best value within this paper	1.36 min	—	—	Text Exact Reported	main p.3, article p.16512 · Response-recovery time · Figure 3c

Cu3(HHTP)2 powder · Powder

Cu3(HHTP)2 powder gas sensor tested toward 100 ppm NH3.

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Powder thick-film recovery time after 100 ppm NH3	Recovery time: 10 min	—	—	Visual Estimate Approximate	SI p.11 · Figure S7 · Figure S7
Powder thick-film response to 100 ppm NH3	R approx 0.206 in Figure S7 label	—	visual conversion from plotted R value	Visual Estimate Approximate	SI p.11 · Figure S7 · Figure S7
Powder thick-film response time to 100 ppm NH3	Response time: 2.1 min	—	—	Visual Estimate Approximate	SI p.11 · Figure S7 · Figure S7

Cu3(HHTP)2-xC layer-by-layer thin-film series · Thin Film

Target gas mixed with dry air; constant flow 600 mL min^-1; 5 V bias; current recorded with Keithley 2602B Sourcemeter.

Temperature: room temperature
Atmosphere: Dry air and target gas mixtures.
Geometry: Thin films grown on Si/SiO2, sapphire or glass substrates with Au interdigital electrodes.
Context: Pristine Cu3(HHTP)2-xC films used directly as chemiresistive sensors.
Measurement source: SI p.3-p.4 · Gas sensor characterizations

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Sensor bias voltage	5 V	—	—	Text Exact Reported	SI p.3-p.4 · Gas sensor characterizations
Sensor gas flow rate	600 ml min-1	—	—	Text Exact Reported	SI p.3 · Gas sensor characterizations

Cu3(HHTP)2-10C thin-film chemiresistor · Electrode

Cu3(HHTP)2-10C sensor response tracked for about 3 months; inset compares repeated tests at different times.

Temperature: room temperature
Atmosphere: NH3 in dry air.
Geometry: Au interdigitated electrode chemiresistor.
Context: Pristine Cu3(HHTP)2-10C thin-film sensor.
Measurement source: main p.3, article p.16512 · Stability discussion · Figure S10

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Response retention after 3 monthsMarked as a best value within this paper	88.4 %	—	—	Text Exact Reported	main p.3, article p.16512 · Stability discussion · Figure S10

Cu3(HHTP)2-xC layer-by-layer thin-film series · Thin Film

Cu3(HHTP)2-xC sensors with 10, 20, 30, 40 and 50 cycles tested toward NH3; time constants shown for 100 ppm NH3.

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Cu3(HHTP)2-20C recovery time after 100 ppm NH3	T_rec = 17.9 min	—	—	Figure Axis Rounded Reported	SI p.12 · Figure S9 · Figure S9b
Cu3(HHTP)2-30C recovery time after 100 ppm NH3	T_rec = 23.57 min	—	—	Figure Axis Rounded Reported	SI p.12 · Figure S9 · Figure S9d
Cu3(HHTP)2-40C recovery time after 100 ppm NH3	T_rec = 45.42 min	—	—	Figure Axis Rounded Reported	SI p.12 · Figure S9 · Figure S9f
Cu3(HHTP)2-50C recovery time after 100 ppm NH3	T_rec = 61 min	—	—	Figure Axis Rounded Reported	SI p.12 · Figure S9 · Figure S9h
Cu3(HHTP)2-20C response time to 100 ppm NH3	T_res = 1.32 min	—	—	Figure Axis Rounded Reported	SI p.12 · Figure S9 · Figure S9b
Cu3(HHTP)2-30C response time to 100 ppm NH3	T_res = 2.81 min	—	—	Figure Axis Rounded Reported	SI p.12 · Figure S9 · Figure S9d
Cu3(HHTP)2-40C response time to 100 ppm NH3	T_res = 4.18 min	—	—	Figure Axis Rounded Reported	SI p.12 · Figure S9 · Figure S9f
Cu3(HHTP)2-50C response time to 100 ppm NH3	T_res = 3.3 min	—	—	Figure Axis Rounded Reported	SI p.12 · Figure S9 · Figure S9h