Sensing Application — Copper-Based Two-Dimensional Conductive Metal-Organic Framework Thin Films for Ultrasensitive Detection of Perfluoroalkyls in Drinking Water

4 measurement groups · 9 results

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

EIS bare-channel control

Impedance spectroscopy

Bare ITO channel/control electrode · Electrode

Bare channel without MOF layer measured in PBS, 1 pM PFOA, and 1 uM PFOA.

Atmosphere: aqueous PBS electrolyte
Geometry: Bare channel without Cu-HHTP MOF layer
Context: non-MOF control
Measurement source: p007 / SI p.7 · Supporting Figure S10 · Figure S10

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Bare-channel resistance trend with PFOA	Bare channel resistance increases in the presence of PFOA.	—	—	Caption Qualitative	p007 / SI p.7 · Supporting Figure S10 · Figure S10

Electrochemical impedance spectroscopy (EIS) PFOA sensing

Impedance spectroscopy

Cu-HHTP thin-film device exposed to PFOA · Electrode

Bio-Logic SP-300, 10 mV sinusoidal AC amplitude, 1 Hz to 1 MHz; sensing analysed at high frequencies 1 kHz to 1 MHz in 0.1x PBS with varying PFOA concentrations.

Atmosphere: 0.1x PBS aqueous electrolyte
Geometry: Two-terminal resistance-dominated Cu-HHTP chemiresistive device; channel immersed in contaminated PBS
Context: PFOA-exposed Cu-HHTP sensor versus pristine PBS
Measurement source: p004-p005 and p008 / article pp.6335-6336 and 6339 · MOF-Based PFAS Sensing; Statistics · Figure 3c-e; Figures S7-S8

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Conductance-log(PFAS) calibration correlation	R2 > 0.968; figure caption states R2 value of 0.968 from 10 different devices	—	—	Caption Rounded Reported	p004-p005 / article pp.6335-6336 · MOF-Based PFAS Sensing · Figure 3e
High-frequency impedance-analysis window	1 kHz - 1 MHz	—	—	Text Exact Reported	p005 / article p.6336 · MOF-Based PFAS Sensing · Figure 3c-d
PFOA detection limit in molar unitsMarked as a best value within this paper	as low as 5 fM of PFOA	5e-15 M	—	Text Exact Reported	p005 / article p.6336 · MOF-Based PFAS Sensing · Figure 3d-e
PFOA detection limit in mass concentrationMarked as a best value within this paper	0.002 ng/L of PFOA	—	—	Text Exact Reported	p005 / article p.6336 · MOF-Based PFAS Sensing · Figure 3d-e
Independent measurements per concentration	10 independent measurements for each concentration	—	error bars are standard deviations	Caption Exact Reported	p004 / article p.6335 · MOF-Based PFAS Sensing · Figure 3e
Detection relative to health advisory level	PFOA and PFOS detected nearly 4 orders of magnitude below 10 ng/L advisory level	—	—	Text Approximate	p005 / article p.6336 · MOF-Based PFAS Sensing · Figure 3e-f

Electrochemical impedance spectroscopy (EIS) PFOS sensing

Impedance spectroscopy

Cu-HHTP thin-film device exposed to PFOS · Electrode

Bode plots recorded from the Cu-HHTP MOF channel when different amounts of PFOS were added into PBS solution.

Atmosphere: PBS aqueous electrolyte
Geometry: Two-terminal Cu-HHTP MOF channel
Context: PFOS-exposed Cu-HHTP sensor versus pristine PBS
Measurement source: p004-p005 / article pp.6335-6336 · MOF-Based PFAS Sensing · Figure 3f

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
PFOS concentration range shown in Bode plot	PBS, 10^-14 M, 10^-11 M, 10^-8 M, and 10^-5 M PFOS	—	—	Figure Axis Rounded Reported	p004 / article p.6335 · MOF-Based PFAS Sensing · Figure 3f

Repeated-use EIS sensing/rinse test

Impedance spectroscopy

Cu-HHTP thin-film device exposed to PFOA · Electrode

Cu-HHTP sensor used repeatedly for 10 nM PFOA with careful rinsing between sensing cycles.

Atmosphere: aqueous ambient
Geometry: Cu-HHTP-based sensor
Context: Repeated PFAS adsorption/release on Cu-HHTP
Measurement source: p007 / SI p.7 · Supporting Figure S9 · Figure S9

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Repeated-use cycles without significant decline	at least 10 times without significant decline in performance	—	—	Text Exact Reported	p005 / article p.6336 · MOF-Based PFAS Sensing · Figure S9