Sensing Application — Layer-by-layer assembled dual-ligand conductive MOF nano-films with modulated chemiresistive sensitivity and selectivity

3 measurement groups · 15 results

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

Chemiresistive response-recovery to benzene

x mol% HITP doped Cu-HHTP-10C nanofilm series · Thin Film

Room-temperature benzene exposures of 1-100 ppm; response-recovery curves and 100 ppm time comparison.

Temperature: 298
Atmosphere: dry air carrier/baseline
Geometry: activated thin films on sapphire substrates precoated with interdigital Au electrodes
Context: doped EC-MOF chemiresistor series
Measurement source: p003-p004 / article pp.440-441 · Results and discussion · Fig. 3(a-c)

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Benzene detection limit for 0.1 mol% HITPMarked as a best value within this paper	0.024 ppm	—	—	Figure Axis Rounded Reported	p004 / article p.441 · Figure · Fig. 3(c)
Benzene detection limit for 0.5 mol% HITP	0.040 ppm	—	—	Figure Axis Rounded Reported	p004 / article p.441 · Figure · Fig. 3(c)
Benzene detection limit for 10.0 mol% HITP	0.078 ppm	—	—	Figure Axis Rounded Reported	p004 / article p.441 · Figure · Fig. 3(c)
Benzene detection limit for 1.0 mol% HITP	0.096 ppm	—	—	Figure Axis Rounded Reported	p004 / article p.441 · Figure · Fig. 3(c)
Benzene detection limit for 5.0 mol% HITP	0.068 ppm	—	—	Figure Axis Rounded Reported	p004 / article p.441 · Figure · Fig. 3(c)
Recovery time for >=1.0 mol% HITP sensorsMarked as a best value within this paper	< 10 min	—	upper bound	Text Approximate	p003 / article p.440 · Results and discussion · Fig. 3(b)
Response time for >=1.0 mol% HITP sensorsMarked as a best value within this paper	< 1 min	—	upper bound	Text Approximate	p003 / article p.440 · Results and discussion · Fig. 3(b)

Chemiresistive gas sensor characterisation in home-made flow system

x mol% HITP doped Cu-HHTP-10C nanofilm series · Thin Film

Certified gas mixtures and dry air mixed by mass-flow controllers; constant total flow 200 ml min-1; sensor bias 5 V; current recorded by Keithley 2602B Sourcemeter; quartz chamber fill time about 0.50 min.

Temperature: 298
Atmosphere: dry air carrier/baseline with target gases
Geometry: HITP doped Cu-HHTP-10C grown on sapphire substrate with Au interdigital electrodes
Context: doped EC-MOF chemiresistor series
Measurement source: p001-p002 / SI pp.1-2 · Gas sensor characterisations

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Quartz chamber fill time	~0.50 min	—	—	Text Approximate	p001 / SI p.1 · Gas sensor characterisations
Sensor bias voltage	5 V	—	—	Text Exact Reported	p002 / SI p.2 · Gas sensor characterisations
Gas sensor total flow	200 ml min-1	—	—	Text Exact Reported	p002 / SI p.2 · Gas sensor characterisations

Chemiresistive selectivity comparison for reducing gases versus NH3

x mol% HITP doped Cu-HHTP-10C nanofilm series · Thin Film

100 ppm NH3 and benzene response comparison; additional gases NH3, triethylamine, methane, benzene, ethylbenzene, hydrogen, butanone and acetone.

Temperature: 298
Atmosphere: dry air carrier/baseline
Geometry: sapphire/interdigital Au chemiresistors
Context: doped EC-MOF chemiresistor series
Measurement source: p003-p004 / article pp.440-441 · Results and discussion · Fig. 3(d-f)

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Maximum benzene vs NH3 selectivity improvementMarked as a best value within this paper	~ 220% at 10.0 mol% HITP; abstract/conclusion says over 220%	—	—	Text Approximate	p003 / article p.440 · Results and discussion · Fig. 3(d)
Benzene response range across HITP dopants	between 75% and 90%	—	range 75-90%	Text Range	p003 / article p.440 · Results and discussion · Fig. 3(d)
NH3 response decreases with HITP doping	from ~240% to ~80%	—	—	Text Approximate	p003 / article p.440 · Results and discussion · Fig. 3(d)
Approximate selectivity improvement for other gases vs NH3	~ 100% S improvement	—	—	Text Approximate	p004 / article p.441 · Results and discussion · Fig. 3(f)
Maximum triethylamine vs NH3 selectivity improvementMarked as a best value within this paper	up to ~ 227% at 10.0 mol% HITP	—	—	Text Approximate	p004 / article p.441 · Results and discussion · Fig. 3(f)