Primary studyCore evidenceTransport Physics

Ultrathin MOF nanosheet-based resistive sensors for highly sensitive detection of methanol

Dai F., Cui X., Luo Y. et al. · Chemical Communications · 2022 · 11543-11546

1materials
3samples
3synthesis routes
7measurements
40results
4claims and caveats

Evidence map

Open a family to keep every result attached to its sample, method and conditions.

Author interpretations and caveats

Paraphrased for this database from the authors’ stated interpretations — never quoted verbatim — and kept separate from reported measurements.

Application RelevanceSupport assessment: High

The Co-TCPP-Ac NS thin-film sensor detects methanol at room temperature with high response, low detection limit, repeatability, stability, and selectivity.

Caveat: Application values are first-hand device measurements; raw data are not provided in the supplied documents.

4 · summary · Fig. 3 · Linked to 6 structured results

Phase AssignmentSupport assessment: High

Co-TCPP-Ac nanosheets retain the same crystal structure as Co-TCPP-Ac bulk crystals.

Caveat: Powder XRD and electron diffraction support phase retention; full single-crystal refinement was performed on bulk crystals, not nanosheets.

2 · main text · Fig. S2a · Linked to 3 structured results

Structure Property LinkSupport assessment: Medium

High methanol selectivity is attributed to interactions between methanol and Co-TCPP-Ac NSs, abundant unsaturated Co sites, ultrathin morphology, and suitable conductivity.

Caveat: Mechanistic attribution is plausible and supported by spectroscopy, but adsorption energetics or direct site quantification were not reported.

4 · main text · Fig. 4 · Linked to 5 structured results

Transport MechanismSupport assessment: Medium

Co-TCPP-Ac NSs are inferred to be n-type semiconductors because resistance decreases upon exposure to reducing methanol gas.

Caveat: The claim is mechanistic inference from sensing response and UPS/FTIR, not a direct Hall measurement.

3 · main text · Fig. 4 · Linked to 2 structured results

Material identities

Names and aliases are kept exactly within the paper’s own identity model.

MaterialCompositionStructure contextSource
Co-TCPP-Ac[Co3(TCPP)(Ac)]n.(CH3CH3N+); empirical formula C50H27Co3N4O11 in Table S1Co2+ porphyrin centres and Co2 paddlewheel secondary building units · 5,10,15,20-tetra(carboxyphenyl)porphyrin (H6TCPP/TCPP) with acetate/acetic acid axial connectors3D · PristineOrthorhombic Cmmm, non-interpenetrated 3D framework, 4,6-c fsc topology.2 · main text · Fig. 1; Table S1 cited

Sample register

Sample form, processing state and composition status define the context for measurements.

Show 3 sample records
SampleForm and roleProcessing and geometrySource
Co-TCPP-Ac bulk crystalsresearch_0585__mat__co_tcpp_acSingle Crystal · Pristine Control · Pristine FrameworkRed crystalline blocks collected by filtration, washed with DMA and ethanol, dried in air.2 · Experimental Section · Fig. S1
Co-TCPP-Ac NSsresearch_0585__mat__co_tcpp_acNanosheet · Target Sample · Pristine FrameworkSurfactant-assisted solvothermal nanosheets prepared with PVP.10 +/- 2 nm by AFM2 · main text · Fig. 2; Fig. S2
Co-TCPP-Ac NS thin film-based sensorresearch_0585__mat__co_tcpp_acElectrode · Target Sample · Pristine FrameworkCo-TCPP-Ac NS thin film spin-coated at 800 rpm for 30 s and oven-dried at 60 degC for 3 h.Planar rigid printed circuit board with Cu/Ni interdigital electrodes4 · Fabrication of gas sensors · Fig. S5