Primary studyCore evidenceTransport Physics

Novel 2D CuFe-MOF-based immunoprobe: Addressing antifouling electrochemical immunosensing inadequate sensitivity challenge

Jiang X., Yao T., Wang S. et al. · Sensors and Actuators B: Chemical · 2024 · 135410

7materials
11samples
8synthesis routes
19measurements
84results
6claims 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 hydrophilic ST-HA hydrogel coating provides superior antifouling performance in real serum compared with bare and BSA-modified GCE.

Caveat: Only the 100% serum gel contamination value is reported exactly in text; other gel and BSA bars are not numerically tabulated.

7 · 3.5 Antifouling performance · Fig. 4 · Linked to 3 structured results

Application RelevanceSupport assessment: High

Spike recovery results indicate the proposed immunosensor is suitable for SCCA detection in real serum samples.

Caveat: Clinical serum comparison table S1 is mentioned but the SI text layer does not include the table body.

8 · 3.9 Application · Table 2 · Linked to 2 structured results

Application RelevanceSupport assessment: High

The CuFe-MOF immunoprobe/hydrogel immunosensor enables fg mL-1-level SCCA detection over a broad linear range.

Caveat: Application sensing performance, not an intrinsic transport property of the MOF.

7 · 3.7 Analytical performance · Fig. 5; Table 1 · Linked to 4 structured results

CaveatSupport assessment: High

No first-hand direct electrical transport, thermoelectric or porosity measurements for pristine CuFe-MOF were reported.

Caveat: The conductive role is assessed only through electrochemical behaviour of composite electrodes and qualitative discussion.

5 · 3.4 Electrochemical characterization · Fig. 3A,B

Structure Property LinkSupport assessment: Medium

The planar conjugated BDC ligand and 2D MOF nanosheet architecture are proposed to improve conductivity at the antifouling sensing interface.

Caveat: The paper does not report a direct electrical conductivity, resistivity, mobility or thermoelectric measurement for CuFe-MOF.

1 · Abstract · Linked to 1 structured result

Transport MechanismSupport assessment: Medium

Fe-Cu bimetallic sites are claimed to promote electron transfer from Cu(I) to Fe(III), accelerate Fe(III)/Fe(II) conversion and enhance Fenton-like catalytic activity.

Caveat: Mechanistic hydroxyl-radical/electron-transfer claim is inferred from catalytic sensing behaviour and literature rather than direct radical quantification in the extracted text.

8 · 4. Conclusion · Linked to 3 structured results

Material identities

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

MaterialCompositionStructure contextSource
Au-Thi@ST-HA antifouling hydrogelST-HA gel with Au nanoparticles and thionineAu nanoparticles · 5-serotonin hydrochloride and hyaluronic acid crosslinked with PEIunknown · CompositeHydrophilic hydrogel with amide-bond formation verified by FTIR and Au distribution verified by SEM/EDS.2 · 2.3 Preparation of antifouling hydrogel substrate
BSA/Ab2/CuFe-MOF immunoprobeBSA/Ab2/CuFe-MOFCu and Fe in CuFe-MOF · BDC in CuFe-MOF; biomolecular BSA and antibody Ab22D · CompositeCuFe-MOF modified with labeling antibody Ab2 and BSA blocking layer.2 · 2.4 Preparation of immunoprobe
Cu2O nanocubesCu2OCu0D · PristineCu2O precursor crystals matched the Cu2O standard card COD-1000063 by XRD.5 · 3.3 Characterization of immunoprobe · Fig. 2A
Cu-BDC bulkCu-BDCCu · 1,4-benzenedicarboxylate (BDC) from H2BDCunknown · PristineBulk Cu-BDC XRD peaks indexed to COD-687690.1.3 Experimental
Cu-BDC nanosheetsCu-BDCCu · 1,4-benzenedicarboxylate (BDC) from H2BDC2D · Pristine2D Cu-BDC nanosheets with shifted/disappearing XRD peaks relative to bulk Cu-BDC; lamellar nanosheet morphology by SEM/TEM.4 · 2.4 Preparation of immunoprobe
2D CuFe-MOFCuFe-MOF; Cu/Fe-BDCCu and Fe · 1,4-benzenedicarboxylate (BDC) from H2BDC2D · PristineMixed-metal 2D MOF nanosheets; XRD peaks ascribed to Cu-BDC bulk and FeO2 reference peaks, with Fe incorporation supported by XPS and EDS.1 · Abstract
Glassy carbon electrode platformCunknown · Model SystemElectrode substrate used for electrochemical measurements.1.2 Apparatus

Sample register

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

Show 11 sample records
SampleForm and roleProcessing and geometrySource
Au-Thi@ST-HA hydrogelresearch_0571__mat__au_thi_st_ha_gelThin Film · Composite Sample · CompositeST-HA hydrogel crosslinked with PEI and loaded with Au nanoparticles/thionineGCE when cast as sensing substrate2 · 2.3 Preparation of antifouling hydrogel substrate
Bare GCEresearch_0571__mat__gce_platformElectrode · Pristine Control · Modelpolished and cleaned electrodeglassy carbon electrode2 · 2.5 Fabrication of immunosensor
BSA/Ab2/CuFe-MOF immunoproberesearch_0571__mat__bsa_ab2_cufe_immunoprobeNanosheet · Composite Sample · CompositeCuFe-MOF activated by EDC/NHS, labelled with Ab2, blocked with BSA2 · 2.4 Preparation of immunoprobe
Cu2O nanocubesresearch_0571__mat__cu2o_precursorPowder · Composite Component · Unknownprecursor powder/nanocubes2 · 2.4 Preparation of immunoprobe
Cu-BDC bulkresearch_0571__mat__cu_bdc_bulkPowder · Pristine Control · Pristine Frameworksolvothermal bulk powder dried at 60 C overnight1.3 Experimental
Cu-BDC nanosheetsresearch_0571__mat__cu_bdc_nanosheetsNanosheet · Pristine Control · Pristine Frameworkwashed blue solid re-dispersed in methanol2 · 2.4 Preparation of immunoprobe
2D CuFe-MOFresearch_0571__mat__cu_fe_mofNanosheet · Target Sample · Mixed Metalbrown product washed and vacuum-dried2 · 2.4 Preparation of immunoprobe
CuFe-MOF feed-ratio seriesresearch_0571__mat__cu_fe_mofNanosheet · Target Sample · Mixed MetalCu:Fe feed ratios: Cu-BDC, 1:0.25, 1:0.5, 1:0.75, 1:1, 1:25 · 3.3 Characterization of immunoprobe · Fig. 2L
GCE-Gel-Ab1-Antigen-Probe immunosensorresearch_0571__mat__gce_platformElectrode · Composite Sample · CompositeGCE coated with Au-Thi@ST-HA gel, Ab1, BSA, antigen, and BSA/Ab2/CuFe-MOF probeglassy carbon electrode2 · 2.5 Fabrication of immunosensor
BSA-modified GCEresearch_0571__mat__gce_platformElectrode · Pristine Control · CompositeGCE modified with BSA antifouling layerglassy carbon electrode6 · 3.5 Antifouling performance of immunosensor · Fig. 4
GCE-Gelresearch_0571__mat__gce_platformElectrode · Composite Sample · CompositeGCE modified with Au-Thi@ST-HA hydrogelglassy carbon electrode6 · 3.5 Antifouling performance of immunosensor · Fig. 4