Sensing Application

chemiresistive gas sensing

Cu3(HITP)2 NFA chemiresistor sensor · Electrode

Room-temperature response-recovery to ethanol vapour at 1, 5, 10, 20 and 50 ppm; response defined as delta R/R0 in high-purity dry air.

Temperature: room temperature
Atmosphere: high-purity dry air baseline; ethanol vapour exposure
Geometry: Silver-paste electrode with 50 micrometre nickel wire leads; sealed quartz chamber; current/voltage test method with dry air carrier gas.
Context: Composite NFA sensor layer.
Measurement source: 11-12 · 3.2 Chemiresistive Gas Sensors · Figure 6a-c

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
ethanol response linear-fit R2	R2 = 0.96	—	—	Caption Exact Reported	11 · Figure caption · Figure 6c
theoretical ethanol limit of detectionMarked as a best value within this paper	about 0.5 ppm	—	about	Text Approximate	12 · 3.2 Chemiresistive Gas Sensors · Figure 6c
recovery time for 20 ppm ethanol	tau_rec = 64 s	—	—	Text Exact Reported	11 · 3.2 Chemiresistive Gas Sensors · Figure 6b
ethanol response at 10 ppm	approximately 2.45%	—	visual estimate from Figure 6a/c	Figure Axis Approximate	11 · 3.2 Chemiresistive Gas Sensors · Figure 6a,c
ethanol response at 1 ppm	approximately 1.4%	—	visual estimate from Figure 6a/c	Figure Axis Approximate	11 · 3.2 Chemiresistive Gas Sensors · Figure 6a,c
ethanol response at 20 ppm	approximately 3.3%	—	visual estimate from Figure 6a/c	Figure Axis Approximate	11 · 3.2 Chemiresistive Gas Sensors · Figure 6a,c
ethanol response at 50 ppmMarked as a best value within this paper	approximately 5.1%	—	visual estimate from Figure 6a/c	Figure Axis Approximate	11 · 3.2 Chemiresistive Gas Sensors · Figure 6a,c
ethanol response at 5 ppm	approximately 1.9%	—	visual estimate from Figure 6a/c	Figure Axis Approximate	11 · 3.2 Chemiresistive Gas Sensors · Figure 6a,c
response time for 20 ppm ethanol	tau_res = 50 s	—	—	Text Exact Reported	11 · 3.2 Chemiresistive Gas Sensors · Figure 6b
chemiresistor nickel lead wire diameter	50 micrometre diameter nickel wire	—	—	Text Exact Reported	S2 · Gas sensor characterizations

chemiresistive VOC selectivity

Cu3(HITP)2 NFA chemiresistor sensor · Electrode

Room-temperature response to 200 ppm acetone, ethanol, xylene, toluene, methylbenzene, methanol, triethylamine and butanone.

Temperature: room temperature
Atmosphere: VOC vapour exposure in dry-air baseline
Geometry: Silver-paste electrode with 50 micrometre nickel wire leads; sealed quartz chamber; current/voltage test method with dry air carrier gas.
Context: Composite NFA sensor layer.
Measurement source: 11-12 · 3.2 Chemiresistive Gas Sensors · Figure 6d

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
acetone response at 200 ppm	approximately 10.5%	—	visual estimate from Figure 6d	Figure Axis Approximate	11 · Figure caption · Figure 6d
butanone response at 200 ppm	approximately 13%	—	visual estimate from Figure 6d	Figure Axis Approximate	11 · Figure caption · Figure 6d
ethanol response at 200 ppm	approximately 11%	—	visual estimate from Figure 6d	Figure Axis Approximate	11 · Figure caption · Figure 6d
methanol response at 200 ppm	approximately 18.5%	—	visual estimate from Figure 6d	Figure Axis Approximate	11 · Figure caption · Figure 6d
methylbenzene response at 200 ppm	approximately 17.5%	—	visual estimate from Figure 6d	Figure Axis Approximate	11 · Figure caption · Figure 6d
toluene response at 200 ppm	approximately 16%	—	visual estimate from Figure 6d	Figure Axis Approximate	11 · Figure caption · Figure 6d
triethylamine response at 200 ppmMarked as a best value within this paper	approximately 23%	—	visual estimate from Figure 6d	Figure Axis Approximate	11 · Figure caption · Figure 6d
xylene response at 200 ppm	approximately 15.5%	—	visual estimate from Figure 6d	Figure Axis Approximate	11 · Figure caption · Figure 6d

2 measurement groups · 18 results