Primary studyCore evidenceTransport Physics

Ultrasensitive levofloxacin electrochemical biosensor based on semiconducting covalent organic framework/poly-L-cysteine/triangular Ag nanoplates modified glassy carbon electrode

Sun L., Guo H., Liu B. et al. · Microchimica Acta · 2023 · 346

5materials
7samples
5synthesis routes
19measurements
71results
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 final composite sensor provides sensitive LEV detection across 0.05-600 uM with a 0.00610 uM LOD and acceptable recoveries in human serum and urine.

Caveat: Real-sample evidence includes main Table 2 and low-dilution SI Table S1; all are standard-addition spike recoveries.

p001 · Abstract · Linked to 6 structured results

CaveatSupport assessment: High

The office SI text is incomplete at Table S1, but the rendered SI surrogate provides the figures, chronocoulometry/electroactive-area details, robustness values, and low-dilution Table S1 rows.

Caveat: Use rendered SI provenance for SI-only figure/table values; the office text alone would be incomplete.

p010 · S7. Real sample analysis · Table S1 · Linked to 3 structured results

Composite RoleSupport assessment: High

The final TABQ-CHHO-COF/Poly-L-Cys/Tri-AgNP composite combines COF conductivity/porosity with poly-L-cysteine/Tri-AgNP active sites to accelerate electron transfer and improve LEV response.

Caveat: Evidence is electrochemical rather than direct microscopic proof of all interfacial interactions.

p008 · Conclusions · Linked to 3 structured results

Phase AssignmentSupport assessment: High

FT-IR, PXRD, and XPS data support successful synthesis of TABQ-CHHO-COF by condensation of CHHO and TABQ.

Caveat: XPS figure itself is in the SI; main text reports the assignments and rendered SI verifies the figure/caption.

p004 · Physical characterizations of the modified materials · Fig. 1; Fig. S2 · Linked to 5 structured results

Structure Property LinkSupport assessment: High

The pristine semiconducting TABQ-CHHO-COF improves electrode conductivity and lowers charge-transfer resistance relative to bare GCE.

Caveat: Conductivity measurement geometry is not given.

p005 · Electrochemical characterization of the modified electrodes · Fig. 2 · Linked to 3 structured results

Transport MechanismSupport assessment: Medium

LEV oxidation on the final composite electrode is an irreversible, adsorption-controlled process involving approximately two electrons and two protons.

Caveat: Mechanistic assignment is inferred from electrochemical regressions and Laviron analysis.

p006-p007 · Optimization of the experiment conditions · Scheme 2; Fig. S5 · Linked to 4 structured results

Material identities

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

MaterialCompositionStructure contextSource
glassy carbon electrodeCunknown · Model SystemCommercial glassy carbon working electrode, 3 mm diameter.p003 · Apparatus and instruments
Poly-L-Cys/Tri-AgNPNot specifiedTriangular Ag nanoplates · electropolymerised L-cysteine filmunknown · CompositeTriangular Ag nanoplates confined within porous poly-L-cysteine cavities through thiol-involved ligand exchange.p002 · Introduction
TABQ-CHHO-COFNot specifiednone · cyclohexanehexaone/cyclohexanehexone (CHHO) and tetraminophenone/tetraaminobenzoquinone (TABQ) condensation units2D · PristineNitrogen-rich semiconducting covalent organic framework with benzoquinone and triquinoxalinylene units, carbonyl and pyrazine groups, and PXRD peaks assigned to (220), (201), and (002) planes.p002 · Introduction
TABQ-CHHO-COF/Poly-L-Cys/Tri-AgNPNot specifiedTriangular Ag nanoplates as nanoparticle component; no framework metal nodes · TABQ-CHHO-COF plus electropolymerised L-cysteine2D · CompositeTernary nanocomposite combining semiconducting TABQ-CHHO-COF, poly-L-cysteine, and triangular Ag nanoplates for GCE modification.p002 · Introduction
triangular Ag nanoplatesAgAg nanoplates0D · PristineShape-controlled triangular silver nanoplates used as a redox mediator and electroactive component.p002 · Introduction

Sample register

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

Show 7 sample records
SampleForm and roleProcessing and geometrySource
bare GCEresearch_0406__mat__mat_gceElectrode · Pristine Control · ModelPolished with alumina powder, washed with ethanol and double-distilled water, and dried with nitrogen gas.glassy carbon electrodep004 · Fabrication of TABQ-CHHO-COF/Poly-L-Cys/Tri-AgNP/GCE
TABQ-CHHO-COF/Poly-L-Cys/Tri-AgNP/GCEresearch_0406__mat__mat_tabq_chho_cof_poly_l_cys_tri_agnpElectrode · Target Sample · CompositeTABQ-CHHO-COF/GCE coated with electropolymerised poly-L-cysteine, then 4 uL Tri-AgNP suspension drop-cast, incubated, and dried at room temperature.glassy carbon electrodep004 · Fabrication of TABQ-CHHO-COF/Poly-L-Cys/Tri-AgNP/GCE
Poly-L-Cys/Tri-AgNP/GCEresearch_0406__mat__mat_poly_l_cys_tri_agnpElectrode · Pristine Control · CompositeControl electrode containing poly-L-cysteine and triangular Ag nanoplates on GCE; detailed separate preparation not given in the main text.glassy carbon electrodep004 · Electrochemical characterization of the modified electrodes · Fig. 2
TABQ-CHHO-COF/GCEresearch_0406__mat__mat_tabq_chho_cofElectrode · Pristine Control · Pristine Framework5 uL TABQ-CHHO-COF suspension drop-cast on pretreated GCE and dried under an infrared lamp.glassy carbon electrodep004 · Fabrication of TABQ-CHHO-COF/Poly-L-Cys/Tri-AgNP/GCE
TABQ-CHHO-COF/Poly-L-Cys/GCE intermediateresearch_0406__mat__mat_tabq_chho_cof_poly_l_cys_tri_agnpElectrode · Composite Sample · CompositeCysteine electropolymerised on TABQ-CHHO-COF/GCE from 0.02 M cysteine at pH 1.0 over 25 cycles.glassy carbon electrodep004 · Fabrication of TABQ-CHHO-COF/Poly-L-Cys/Tri-AgNP/GCE
TABQ-CHHO-COF powderresearch_0406__mat__mat_tabq_chho_cofPowder · Composite Component · Pristine FrameworkBlack powder rinsed with water, methanol, and acetone, Soxhlet washed with methanol/water for 24 h, and annealed at 200 C for 5 h under nitrogen.p003-p004 · Synthesis of TABQ-CHHO-COF
Tri-AgNP suspensionresearch_0406__mat__mat_tri_agnpUnknown · Composite Component · UnknownInk-blue triangular Ag nanoplate suspension obtained after repeated centrifugation.p004 · Synthesis of Tri-AgNP