Sensing Application — A Dual-Ligand Porous Coordination Polymer Chemiresistor with Modulated Conductivity and Porosity

Measurement evidence

Sensing Application

A Dual-Ligand Porous Coordination Polymer Chemiresistor with Modulated Conductivity and Porosity · Yao M.-S., Zheng J.-J., Wu A.-Q. et al. · Angewandte Chemie - International Edition · 2020 · 172-176

1 measurement group · 8 results

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

Room-temperature chemiresistive gas sensing in a home-made dynamic sensing setup

Cu3(HHTP)(THQ) nanowire thick-film gas sensor · Thin Film

Target gas generated by certified mixtures or bubbling/drying; dry air carrier; constant flow 100 mL min-1; 5 V bias; current recorded with Keithley 2602B.

Temperature: room temperature
Atmosphere: Dry air with NH3, ethanol or acetone challenge gases
Geometry: Nanowire thick film on glass/Au interdigital electrodes
Context: pristine dual-ligand MOF thick-film device
Measurement source: 2-3 · Gas sensor characterizations · Figure 4; Figures S14-S17

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
NH3 limit of detection from linear plot at 3RMS	approximately 0.35 ppm	—	3 RMS	Text Approximate	175 · Results and discussion · Figure 4b; Table S4
NH3 theoretical limit of detection from log-log plotMarked as a best value within this paper	approximately 0.02 ppm	—	—	Text Approximate	175 · Results and discussion · Figure 4b; Table S4
Recovery time from 10 ppm NH3Marked as a best value within this paper	2.57 min	—	—	Text Exact Reported	174 · Results and discussion · Figure 4a; Figure S14
Response time to 10 ppm NH3Marked as a best value within this paper	1.65 min	—	—	Text Exact Reported	174 · Results and discussion · Figure 4a; Figure S14
Recovery after saturated NH3 exposure	~88% recovery after 80 min	—	after 80 min	Text Approximate	13 · Figure S15 caption · Figure S15
Response time to saturated NH3	2.50 min	—	—	Text Exact Reported	13 · Figure S15 caption · Figure S15
Selectivity toward NH3 over ethanol and acetone	Good selectivity toward NH3; ethanol and acetone responses lower in Figure 4b at high concentrations	—	—	Qualitative Qualitative	175 · Results and discussion · Figure 4b; Figures S16-S17
NH3 low-concentration detection range	1-100 ppm	—	—	Text Range	174 · Results and discussion · Figure 4a,b