Roh H., Quill T.J., Chen G. et al. · ACS Nano · 2025 · 6332-6341
Open a family to keep every result attached to its sample, method and conditions.
Paraphrased for this database from the authors’ stated interpretations — never quoted verbatim — and kept separate from reported measurements.
The Cu-HHTP sensor operates by a bind-and-release mechanism and can be reused at least 10 times after careful rinsing without significant performance decline.
Caveat: Long-term stability, harsher matrices and many-cycle lifetime beyond 10 uses were not reported.
p005 / article p.6336 · MOF-Based PFAS Sensing · Figure S9 · Linked to 1 structured result
Cu-HHTP two-terminal thin-film sensors detect PFOA by EIS down to 5 fM / 0.002 ng/L and show PFOS response at similarly ultralow concentrations.
Caveat: Selectivity among different PFAS or other oxidative pollutants was not fully established.
p005 / article p.6336 · MOF-Based PFAS Sensing · Figure 3 · Linked to 5 structured results
Selectivity is a challenging unresolved issue because other oxidative pollutants might have a similar effect on Cu-HHTP, especially in groundwater samples.
p004 / article p.6335 · MOF-Based PFAS Sensing
Layer-by-layer growth on UV-ozone-treated substrates yields continuous, ordered, homogeneous Cu-HHTP thin films with honeycomb Cu-HHTP diffraction features.
Caveat: Authors note these films were not as crystalline and phase-pure as Cu-HHTP grown on LSMO substrates with longer growth times.
p003 / article p.6334 · MOF Structure Characterization · Figure 2; Figure S2 · Linked to 6 structured results
The observed resistance/conductance response is specific to Cu-HHTP/PFAS interaction rather than only electrolyte/PFOA effects, because bare ITO controls show no CV redox activity and bare-channel resistance increases.
Caveat: Control excludes bare ITO/PFOA redox in tested window but does not exhaustively test all electrolyte/background interferents.
p005 / article p.6336 · MOF-Based PFAS Sensing · Figures S5 and S10 · Linked to 4 structured results
Pristine Cu-HHTP contains Cu1+ and Cu2+ states in a neutral MO4-coordinated structure, enabling redox-sensitive PFAS response.
Caveat: The Cu1+/Cu2+ ratio is inferred from XPS peak positions/ratios; no absolute oxidation-state fraction is reported.
p003-p004 / article pp.6334-6335 · MOF Structure Characterization · Figure 2d · Linked to 3 structured results
PFAS sensing is proposed to proceed through oxidation of Cu-HHTP Cu1+ to Cu2+ while PFAS molecules undergo partial defluorination, producing new metal-F coordination.
Caveat: Mechanism combines XPS and DFT evidence; PFOS reaction was assumed to proceed analogously to PFOA and selectivity remains to be systematically investigated.
p006-p007 / article pp.6337-6338 · PFAS Sensing Mechanism · Figure 4; Figure S11-S17 · Linked to 7 structured results
Names and aliases are kept exactly within the paper’s own identity model.
| Material | Composition | Structure context | Source |
|---|---|---|---|
| Bare patterned ITO substrate/control | ITO | unknown · UnknownCommercial ITO stripe substrate used as non-MOF control electrode/channel. | p003 and p007 / article pp.6334 and 6338 · Results and Discussion; Materials and Methods - Substrate Treatment · Figure S5; Figure S10 |
| Cu-HHTP 2D conductive MOFBrowse family: Cu₃(HHTP)₂ / Cu–HHTP | Cu-HHTP; copper hexahydroxy triphenylene frameworkCopper nodes in CuO4 coordination; Cu present as Cu1+ and Cu2+ in the neutral framework · Hexahydroxytriphenylene / hexahydroxy triphenylene (HHTP) | 2D · Pristine2D conductive honeycomb Cu-HHTP thin film with diffraction indexed to (100), (200), (210), and broad (002) reflections. | p002-p003 / article pp.6333-6334 · Results and Discussion - Materials Processing and Device Fabrication; MOF Structure Characterization · Figures 1-2 |
| Finite cluster model of Cu-HHTPBrowse family: Cu₃(HHTP)₂ / Cu–HHTP | Cu-HHTP cluster extracted from periodic Cu-HHTPOne Cu node with truncated HHTP-linker environment · Two linker molecules from periodic Cu-HHTP, hydrogen-terminated at truncated bonds | 0D · Model SystemComputational finite cluster derived from the full periodic Cu-HHTP structure for PFAS binding and defluorination modelling. | p007 / article p.6338 · Materials and Methods - Density Functional Theory (DFT) Calculations · Figure 4e; Figure S16-S17 |
Sample form, processing state and composition status define the context for measurements.
| Sample | Form and role | Processing and geometry | Source |
|---|---|---|---|
| Bare ITO channel/control electroderesearch_0301__mat__mat_bare_ito | Electrode · Pristine Control · Unknown | ITO working electrode/channel without Cu-HHTP film, tested with and without PFOA.Commercial patterned ITO substrate | p004 and p007 / SI pp.4 and 7 · Supporting Figures · Figure S5; Figure S10 |
| Cu-HHTP finite cluster with PFAS adsorbateresearch_0301__mat__mat_cu_hhtp_cluster_model | Model · Model System · Model | DFT model of Cu-HHTP with PFOA or PFOS in conductor-like polarizable continuum water solvent. | p006-p007 / article pp.6337-6338 · PFAS Sensing Mechanism; Materials and Methods - DFT Calculations · Figure 4e; Figure S16-S17 |
| Cu-HHTP thin-film sensor on patterned ITOresearch_0301__mat__mat_cu_hhtp | Electrode · Target Sample · Pristine Framework | UV-ozone-treated ITO substrate; Cu-HHTP grown by alternating copper acetate/HHTP ethanol dips; annealed at 80 C in N2-filled glovebox.Commercial patterned ITO substrate with 3 mm channel length · Target about 100 nm for sensing; growth about 10 nm per cycle; around 10 growth layers/cycles selected from Figure S6. | p003 and p007 / article pp.6334 and 6338 · Materials Processing and Device Fabrication; Materials and Methods - MOF Film Growth · Figure 1; Figure S6 |
| Cu-HHTP thin-film device exposed to PFOAresearch_0301__mat__mat_cu_hhtp | Electrode · Target Sample · Guest Loaded | Cu-HHTP films/devices exposed to PFOA in PBS, water, or drop-cast PFOA solution; some samples subjected to electrochemical cycling.Patterned ITO for sensing; Cu-HHTP film for XPS exposure studies · Sensor films about 100 nm; XPS drop-cast study used 50 nm Cu-HHTP film. | p004-p006 / article pp.6335-6337 · MOF-Based PFAS Sensing; PFAS Sensing Mechanism · Figures 3-4; Figures S5-S12 and S14-S15 |
| Cu-HHTP thin-film device exposed to PFOSresearch_0301__mat__mat_cu_hhtp | Electrode · Target Sample · Guest Loaded | Cu-HHTP films/devices exposed to PFOS in PBS/water or stock PFOS droplet.Patterned ITO for sensing; MOF-coated glass for optical PFOS contact visualisation · Not separately specified; sensing films use the same target 100 nm Cu-HHTP film platform. | p005-p006 / article pp.6336-6337 · MOF-Based PFAS Sensing; PFAS Sensing Mechanism · Figure 3f; Figures S11 and S13 |
| Pristine Cu-HHTP thin films for structural and spectroscopic characterisationresearch_0301__mat__mat_cu_hhtp | Thin Film · Pristine Control · Pristine Framework | Surface-grown and annealed Cu-HHTP films measured before PFAS exposure.Cleaned glass, ITO-coated glass, or Si substrates depending on characterisation method · Main Figure 2b labels a 100 nm Cu-HHTP film; SI Figure S12 uses a 50 nm film for PFOA drop-cast XPS. | p003 / article p.6334 · MOF Structure Characterization · Figure 2 |